[2] | 1 | ; Project name : Print library |
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[78] | 2 | ; Description : ASM library for character and string |
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[2] | 3 | ; printing related functions. |
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| 4 | |
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| 5 | ;--------------- Equates ----------------------------- |
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| 6 | |
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| 7 | ; String library function to include |
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| 8 | %define USE_PRINT_FORMAT ; Print_Format |
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| 9 | %define USE_PRINT_NEWLINE ; Print_Newline |
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| 10 | %define USE_PRINT_CHARBUFFER ; Print_CharBuffer |
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| 11 | %define USE_PRINT_REPEAT ; Print_Repeat |
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| 12 | ;%define USE_PRINT_BOOL ; Print_Bool |
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| 13 | ;%define USE_PRINT_INTSW ; Print_IntSW |
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| 14 | %define USE_PRINT_INTUW ; Print_IntUW |
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| 15 | ;%define USE_PRINT_INTUDW ; Print_IntUDW |
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| 16 | %define USE_PRINT_INTHEXB ; Print_IntHexB |
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| 17 | %define USE_PRINT_INTHEXW ; Print_IntHexW |
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| 18 | ;%define USE_PRINT_INTHEXDW ; Print_IntHexDW |
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| 19 | |
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| 20 | |
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| 21 | ; Text mode character attribute byte bits for CGA+ |
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| 22 | FLG_CGA_FG_B EQU (1<<0) |
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| 23 | FLG_CGA_FG_G EQU (1<<1) |
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| 24 | FLG_CGA_FG_R EQU (1<<2) |
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| 25 | FLG_CGA_FG_I EQU (1<<3) |
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| 26 | FLG_CGA_BG_B EQU (1<<4) |
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| 27 | FLG_CGA_BG_G EQU (1<<5) |
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| 28 | FLG_CGA_BG_R EQU (1<<6) |
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| 29 | FLG_CGA_BG_I EQU (1<<7) |
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| 30 | FLG_CGA_BG_BLNK EQU (1<<7) ; Blinking is default |
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| 31 | |
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| 32 | ; Text mode character attribute bytes for MDA/Hercules (mono) |
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| 33 | ; *Not displayed on some monitors |
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| 34 | ATTR_MDA_HIDDEN EQU 00h ; Not displayed |
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| 35 | ATTR_MDA_ULINE EQU 01h ; Underlined |
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| 36 | ATTR_MDA_NORMAL EQU 07h ; Normal (white on black) |
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| 37 | ATTR_MDA_INT_U EQU 09h ; High intensity, underlined |
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| 38 | ATTR_MDA_INT EQU 0Fh ; High intensity |
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| 39 | ATTR_MDA_REVERSE EQU 70h ; Reverse video (black on white) |
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| 40 | ATTR_MDA_BLNK EQU 87h ; Blinking white on black* |
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| 41 | ATTR_MDA_BLNK_INT EQU 8Fh ; Blinking high intensity* |
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| 42 | ATTR_MDA_BLNK_REV EQU 0F0h; Blinking reverse video |
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| 43 | |
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| 44 | |
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| 45 | ;-------------- Private global variables ------------- |
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| 46 | ; Section containing initialized data |
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| 47 | ;SECTION .data |
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| 48 | |
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| 49 | g_rgbHex: db "0123456789ABCDEF" ; Hexadecimal printing |
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| 50 | g_rgbFormat: ; Placeholders for Print_Format |
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| 51 | %ifdef USE_PRINT_INTSW |
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| 52 | db 'd' ; Prints signed 16-bit integer (WORD) |
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| 53 | %endif |
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| 54 | %ifdef USE_PRINT_INTUW |
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| 55 | db 'u' ; Prints unsigned 16-bit integer (WORD) |
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| 56 | %endif |
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| 57 | %ifdef USE_PRINT_INTUDW |
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| 58 | db 'U' ; Prints unsigned 32-bit integer (DWORD) |
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| 59 | %endif |
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| 60 | %ifdef USE_PRINT_INTHEXW |
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| 61 | db 'x' ; Prints 8- or 16-bit hexadecimal (BYTE, WORD) |
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| 62 | %endif |
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| 63 | %ifdef USE_PRINT_INTHEXDW |
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| 64 | db 'X' ; Prints 32-bit hexadecimal (DWORD) |
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| 65 | %endif |
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| 66 | db 's' ; Prints string (DS segment) |
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| 67 | db 'S' ; Prints string (far pointer) |
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| 68 | %ifdef USE_PRINT_BOOL |
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| 69 | db 'b' ; Prints boolean value 0 or 1 |
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| 70 | %endif |
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| 71 | db 'c' ; Prints character |
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| 72 | db 'C' ; Prints character number of times |
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| 73 | _g_rgbFormatEnd: |
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| 74 | |
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| 75 | ; Number of different placeholders for Print_Format |
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| 76 | CNT_PLCEHLDRS EQU (_g_rgbFormatEnd-g_rgbFormat) |
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| 77 | |
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| 78 | |
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| 79 | |
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| 80 | ;-------------- Public functions --------------------- |
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| 81 | ; Section containing code |
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| 82 | SECTION .text |
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| 83 | |
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| 84 | ; Include one file to use DOS, BIOS or VRAM macros and functions |
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| 85 | ;%include "prntdos.asm" ; Include to use DOS printing functions |
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| 86 | %include "prntbios.asm" ; Include to use BIOS printing functions |
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| 87 | ;%include "prntvram.asm" ; Include to access VRAM directly |
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| 88 | |
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| 89 | |
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| 90 | ;-------------------------------------------------------------------- |
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| 91 | ; Debugging macro that prints wanted character and newline. |
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[181] | 92 | ; |
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[2] | 93 | ; PRINT_DBG_CH |
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| 94 | ; Parameters: |
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| 95 | ; %1: Character to print |
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| 96 | ; Returns: |
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| 97 | ; Nothing |
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| 98 | ; Corrupts registers: |
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| 99 | ; Nothing |
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| 100 | ;-------------------------------------------------------------------- |
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| 101 | %macro PRINT_DBG_CH 1 |
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| 102 | pushf |
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| 103 | push dx |
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| 104 | push ax |
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| 105 | mov dl, %1 |
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| 106 | PRINT_CHAR |
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[78] | 107 | ;mov dl, CR |
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| 108 | ;PRINT_CHAR |
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| 109 | ;mov dl, LF |
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| 110 | ;PRINT_CHAR |
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[2] | 111 | pop ax |
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| 112 | pop dx |
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| 113 | popf |
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| 114 | %endmacro |
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| 115 | |
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| 116 | |
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| 117 | ;-------------------------------------------------------------------- |
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| 118 | ; Simplified printf-style string formatting function. |
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| 119 | ; Strings must end to STOP character. |
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| 120 | ; Supports following formatting types: |
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| 121 | ; %d Prints signed 16-bit integer (WORD) |
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| 122 | ; %u Prints unsigned 16-bit integer (WORD) |
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| 123 | ; %U Prints unsigned 32-bit integer (DWORD) |
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| 124 | ; %x Prints 8- or 16-bit hexadecimal (BYTE, WORD) |
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| 125 | ; %X Prints 32-bit hexadecimal (DWORD) |
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| 126 | ; %s Prints string (DS segment) |
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| 127 | ; %S Prints string (far pointer) |
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| 128 | ; %b Prints boolean value 0 or 1 |
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| 129 | ; %c Prints character |
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| 130 | ; %[num]C Prints character number of times (up to 256, 0=256) |
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| 131 | ; %% Prints '%' character (no parameter pushed) |
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| 132 | ; |
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| 133 | ; Any placeholder can be set to minimum length by specifying |
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| 134 | ; minimum number of characters. For example %8d would append spaces |
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| 135 | ; after integer so that at least 8 characters would be printed. |
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| 136 | ; |
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| 137 | ; NOTE! Caller must clean the stack variables! |
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[181] | 138 | ; |
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[2] | 139 | ; Print_Format |
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| 140 | ; Parameters: |
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| 141 | ; DL: Min length character (usually space) |
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| 142 | ; DS:SI: Pointer to string to format |
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| 143 | ; Stack: Parameters for formatting placeholders. |
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| 144 | ; Parameter for first placeholder must be pushed last |
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| 145 | ; (to top of stack). |
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| 146 | ; High word must be pushed first for 32-bit parameters. |
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| 147 | ; Returns: |
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| 148 | ; Nothing |
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| 149 | ; Corrupts registers: |
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| 150 | ; AX, SI |
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| 151 | ;-------------------------------------------------------------------- |
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| 152 | %ifdef USE_PRINT_FORMAT |
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| 153 | ALIGN JUMP_ALIGN |
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| 154 | Print_Format: |
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| 155 | push es |
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| 156 | push bp |
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| 157 | push di |
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| 158 | push cx |
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| 159 | push dx ; Push min length character |
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| 160 | push cs ; Copy CS... |
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| 161 | pop es ; ...to ES |
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| 162 | mov bp, sp ; Copy SP to BP |
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| 163 | add bp, 2*6 ; Set BP to point first stack parameter |
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| 164 | cld ; Set LODSB to increment SI |
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| 165 | ALIGN JUMP_ALIGN |
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| 166 | .PrintLoop: ; Load characters from string |
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| 167 | lodsb ; Load char from DS:SI to AL, increment SI |
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| 168 | xor cx, cx ; Zero minimum length |
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| 169 | cmp al, STOP ; End of string? |
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| 170 | je .Return ; If so, return |
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| 171 | cmp al, '%' ; Format placeholder? |
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| 172 | je .Format ; If so, jump to format |
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| 173 | ALIGN JUMP_ALIGN |
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| 174 | .PrintChar: ; Prints single character from AL |
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| 175 | mov dl, al ; Copy character to DL |
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| 176 | PRINT_CHAR ; Print character |
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| 177 | mov dx, 1 ; One char printed |
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| 178 | ALIGN JUMP_ALIGN |
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| 179 | .PrintXtraSoMin: ; Checks how many spaces to append |
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| 180 | sub cx, dx ; Number of spaces needed |
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| 181 | jle .PrintLoop ; Read next character if no spaces needed |
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| 182 | pop dx ; Pop min length character to DL |
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| 183 | ALIGN JUMP_ALIGN |
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| 184 | .PrintSpaceLoop: ; Loop to print the required spaces |
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| 185 | PRINT_CHAR |
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| 186 | loop .PrintSpaceLoop |
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| 187 | push dx ; Store min length character |
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| 188 | jmp .PrintLoop ; Jump to read next character |
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| 189 | ALIGN JUMP_ALIGN |
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| 190 | .Return: ; The only return point for this function |
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| 191 | pop dx |
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| 192 | pop cx |
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| 193 | pop di |
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| 194 | pop bp |
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| 195 | pop es |
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| 196 | ret |
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| 197 | ALIGN JUMP_ALIGN |
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| 198 | .UpdateMinLen: ; Updates placeholder minimum length |
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| 199 | mov al, ah ; Copy digit to AL |
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| 200 | mov ah, cl ; Copy previous length to AH |
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| 201 | aad ; AL=10*AH+AL, AH=0 |
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| 202 | mov cx, ax ; Copy new length to CX |
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| 203 | ALIGN JUMP_ALIGN |
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| 204 | .Format: |
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| 205 | lodsb ; Load char from DS:SI to AL, increment SI |
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| 206 | cmp al, STOP |
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| 207 | je .Return ; Invalid string |
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| 208 | mov ah, al ; Copy char to AH |
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| 209 | sub ah, '0' ; Possible digit char to digit |
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| 210 | cmp ah, 9 ; Was valid digit? |
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| 211 | jbe .UpdateMinLen ; If so, jump to update minimum length |
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| 212 | push cx ; Store number of spaces needed |
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| 213 | mov cx, CNT_PLCEHLDRS ; Load number of placeholders to CX |
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| 214 | mov di, g_rgbFormat ; Load offset to format placeholder table |
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| 215 | repne scasb ; Compare AL to [ES:DI] until match |
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| 216 | pop cx ; Restore spaces needed |
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| 217 | jne .PrintChar ; If no match, jump to print character |
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| 218 | sub di, g_rgbFormat+1 ; To placeholder index |
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| 219 | shl di, 1 ; Shift for word lookup |
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| 220 | jmp [cs:di+.g_rgwFormJump] ; Jump to format |
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| 221 | |
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| 222 | %ifdef USE_PRINT_INTSW |
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| 223 | ALIGN JUMP_ALIGN |
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| 224 | .Print_d: ; Print signed 16-bit integer |
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| 225 | mov ax, [bp] ; Load word to print |
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| 226 | times 2 inc bp |
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| 227 | call Print_IntSW |
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| 228 | jmp .PrintXtraSoMin |
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| 229 | %endif |
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| 230 | %ifdef USE_PRINT_INTUW |
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| 231 | ALIGN JUMP_ALIGN |
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| 232 | .Print_u: ; Print unsigned 16-bit integer |
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| 233 | mov ax, [bp] ; Load word to print |
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| 234 | times 2 inc bp |
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| 235 | call Print_IntUW |
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| 236 | jmp .PrintXtraSoMin |
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| 237 | %endif |
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| 238 | %ifdef USE_PRINT_INTUDW |
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| 239 | ALIGN JUMP_ALIGN |
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| 240 | .Print_U: ; Print unsigned 32-bit integer |
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| 241 | mov ax, [bp] ; Load loword |
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| 242 | mov dx, [bp+2] ; Load hiword |
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| 243 | add bp, 4 |
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| 244 | call Print_IntUDW |
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| 245 | jmp .PrintXtraSoMin |
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| 246 | %endif |
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| 247 | %ifdef USE_PRINT_INTHEXW |
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| 248 | ALIGN JUMP_ALIGN |
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| 249 | .Print_x: ; Prints 8- or 16-bit hexadecimal |
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| 250 | mov ax, [bp] ; Load word to print |
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| 251 | times 2 inc bp |
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| 252 | %ifdef USE_PRINT_INTHEXB |
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| 253 | test ah, ah ; 16-bit hexadecimal? |
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| 254 | jnz .Print_x16 ; If so, jump to print it |
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| 255 | call Print_IntHexB |
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| 256 | jmp .PrintXtraSoMin |
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| 257 | .Print_x16: |
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| 258 | %endif |
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| 259 | call Print_IntHexW |
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| 260 | jmp .PrintXtraSoMin |
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| 261 | %endif |
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| 262 | %ifdef USE_PRINT_INTHEXDW |
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| 263 | ALIGN JUMP_ALIGN |
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| 264 | .Print_X: ; Prints 32-bit hexadecimal |
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| 265 | mov ax, [bp] ; Load loword |
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| 266 | mov dx, [bp+2] ; Load hiword |
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| 267 | add bp, 4 |
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| 268 | call Print_IntHexDW |
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| 269 | jmp .PrintXtraSoMin |
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| 270 | %endif |
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| 271 | ALIGN JUMP_ALIGN |
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| 272 | .Print_s: ; Prints string from DS segment |
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| 273 | mov dx, [bp] ; Load offset to string |
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| 274 | times 2 inc bp |
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| 275 | PRINT_STR_LEN ; Print string |
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| 276 | jmp .PrintXtraSoMin |
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| 277 | ALIGN JUMP_ALIGN |
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| 278 | .Print_S: ; Prints string using far pointer |
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| 279 | push ds ; Store DS |
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| 280 | mov dx, [bp] ; Load offset to string |
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| 281 | mov ds, [bp+2] ; Load segment to string |
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| 282 | add bp, 4 |
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| 283 | PRINT_STR_LEN ; Print string |
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| 284 | pop ds ; Restore DS |
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| 285 | jmp .PrintXtraSoMin |
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| 286 | %ifdef USE_PRINT_BOOL |
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| 287 | ALIGN JUMP_ALIGN |
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| 288 | .Print_b: ; Prints boolean value |
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| 289 | mov ax, [bp] ; Load boolean value to print |
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| 290 | times 2 inc bp |
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| 291 | call Print_Bool |
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| 292 | jmp .PrintXtraSoMin |
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| 293 | %endif |
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| 294 | ALIGN JUMP_ALIGN |
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| 295 | .Print_c: ; Prints character |
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| 296 | mov ax, [bp] ; Load character to print |
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| 297 | times 2 inc bp |
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| 298 | jmp .PrintChar ; Jump to print character |
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| 299 | ALIGN JUMP_ALIGN |
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| 300 | .Print_C: |
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| 301 | mov dx, [bp] ; Load character to print |
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| 302 | times 2 inc bp |
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| 303 | ALIGN JUMP_ALIGN |
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| 304 | .CharLoop: |
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| 305 | PRINT_CHAR |
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| 306 | loop .CharLoop |
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| 307 | jmp .PrintLoop |
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| 308 | |
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| 309 | ALIGN JUMP_ALIGN |
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| 310 | .g_rgwFormJump: ; Jump table for Print_Format |
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| 311 | %ifdef USE_PRINT_INTSW |
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| 312 | dw .Print_d |
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| 313 | %endif |
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| 314 | %ifdef USE_PRINT_INTUW |
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| 315 | dw .Print_u |
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| 316 | %endif |
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| 317 | %ifdef USE_PRINT_INTUDW |
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| 318 | dw .Print_U |
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| 319 | %endif |
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| 320 | %ifdef USE_PRINT_INTHEXW |
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| 321 | dw .Print_x |
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| 322 | %endif |
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| 323 | %ifdef USE_PRINT_INTHEXDW |
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| 324 | dw .Print_X |
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| 325 | %endif |
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| 326 | dw .Print_s |
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| 327 | dw .Print_S |
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| 328 | %ifdef USE_PRINT_BOOL |
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| 329 | dw .Print_b |
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| 330 | %endif |
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| 331 | dw .Print_c |
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| 332 | dw .Print_C |
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| 333 | %endif |
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| 334 | |
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| 335 | |
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| 336 | ;-------------------------------------------------------------------- |
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| 337 | ; Prints newline character to change line. |
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[181] | 338 | ; |
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[2] | 339 | ; Print_Newline |
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| 340 | ; Parameters: |
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| 341 | ; Nothing |
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| 342 | ; Returns: |
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| 343 | ; Nothing |
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| 344 | ; Corrupts registers: |
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| 345 | ; Nothing |
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| 346 | ;-------------------------------------------------------------------- |
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| 347 | %ifdef USE_PRINT_NEWLINE |
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| 348 | ALIGN JUMP_ALIGN |
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| 349 | Print_Newline: |
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| 350 | push ax |
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| 351 | push dx |
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| 352 | mov dl, LF |
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| 353 | PRINT_CHAR |
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| 354 | mov dl, CR |
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| 355 | PRINT_CHAR |
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| 356 | pop dx |
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| 357 | pop ax |
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| 358 | ret |
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| 359 | %endif |
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| 360 | |
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[181] | 361 | |
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[2] | 362 | ;-------------------------------------------------------------------- |
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| 363 | ; Prints wanted number of characters. |
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[181] | 364 | ; |
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[2] | 365 | ; Print_CharBuffer |
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| 366 | ; Parameters: |
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| 367 | ; CX: Number of characters to print |
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| 368 | ; ES:DI: Ptr to character buffer |
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| 369 | ; Returns: |
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| 370 | ; Nothing |
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| 371 | ; Corrupts registers: |
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| 372 | ; AX, CX |
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| 373 | ;-------------------------------------------------------------------- |
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| 374 | %ifdef USE_PRINT_CHARBUFFER |
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| 375 | ALIGN JUMP_ALIGN |
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| 376 | Print_CharBuffer: |
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| 377 | jcxz .Return |
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| 378 | push ds |
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| 379 | push si |
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| 380 | push dx |
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| 381 | push es |
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| 382 | pop ds |
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| 383 | mov si, di |
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| 384 | cld ; LODSB to increment SI |
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| 385 | ALIGN JUMP_ALIGN |
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| 386 | .Rep: |
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| 387 | lodsb ; Load from [DS:SI] to AL |
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| 388 | mov dl, al ; Copy to DL for printing |
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| 389 | PRINT_CHAR |
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| 390 | loop .Rep |
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| 391 | pop dx |
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| 392 | pop si |
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| 393 | pop ds |
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| 394 | .Return: |
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| 395 | ret |
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| 396 | %endif |
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| 397 | |
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| 398 | |
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| 399 | ;-------------------------------------------------------------------- |
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| 400 | ; Repeats wanted character. |
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[181] | 401 | ; |
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[2] | 402 | ; Print_Repeat |
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| 403 | ; Parameters: |
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| 404 | ; CX: Number of times to repeat character |
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| 405 | ; DL: Character to repeat |
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| 406 | ; Returns: |
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| 407 | ; Nothing |
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| 408 | ; Corrupts registers: |
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| 409 | ; AX, CX |
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| 410 | ;-------------------------------------------------------------------- |
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| 411 | %ifdef USE_PRINT_REPEAT |
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| 412 | ALIGN JUMP_ALIGN |
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| 413 | Print_Repeat: |
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| 414 | jcxz .Return |
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| 415 | ALIGN JUMP_ALIGN |
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| 416 | .Rep: |
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| 417 | PRINT_CHAR |
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| 418 | loop .Rep |
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| 419 | .Return: |
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| 420 | ret |
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| 421 | %endif |
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| 422 | |
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| 423 | |
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| 424 | ;-------------------------------------------------------------------- |
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| 425 | ; Prints boolean value. |
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[181] | 426 | ; |
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[2] | 427 | ; Print_Bool |
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| 428 | ; Parameters: |
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| 429 | ; AX: Boolean value (0=FALSE, non-zero=TRUE) |
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| 430 | ; Returns: |
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| 431 | ; DX: Number of characters printed |
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| 432 | ; Corrupts registers: |
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| 433 | ; AX |
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| 434 | ;-------------------------------------------------------------------- |
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| 435 | %ifdef USE_PRINT_BOOL |
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| 436 | ALIGN JUMP_ALIGN |
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| 437 | Print_Bool: |
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| 438 | mov dl, '0' ; Assume FALSE |
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| 439 | test ax, ax ; Is FALSE? |
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| 440 | jz .Print ; If so, jump to print |
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| 441 | inc dx ; Increment to '1' |
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| 442 | ALIGN JUMP_ALIGN |
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| 443 | .Print: |
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| 444 | PRINT_CHAR |
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| 445 | mov dx, 1 ; One character printed |
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| 446 | ret |
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| 447 | %endif |
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| 448 | |
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| 449 | |
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| 450 | ;-------------------------------------------------------------------- |
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| 451 | ; Prints signed or unsigned 16-bit integer. |
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[181] | 452 | ; |
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[2] | 453 | ; Print_IntSW Prints signed 16-bit word |
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| 454 | ; Print_IntUW Prints unsigned 16-bit word |
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| 455 | ; Parameters: |
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| 456 | ; AX: Word to print |
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| 457 | ; Returns: |
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| 458 | ; DX: Number of characters printed |
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| 459 | ; Corrupts registers: |
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| 460 | ; AX |
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| 461 | ;-------------------------------------------------------------------- |
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| 462 | %ifdef USE_PRINT_INTSW |
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| 463 | ALIGN JUMP_ALIGN |
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| 464 | Print_IntSW: |
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[78] | 465 | test ax, ax ; Positive integer? |
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| 466 | jns Print_IntUW ; If so, jump to print it |
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[2] | 467 | push di ; Store DI |
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| 468 | push ax ; Store word |
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| 469 | mov dl, '-' ; Print '-' |
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| 470 | PRINT_CHAR |
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| 471 | mov di, 1 ; One character printed |
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| 472 | pop ax ; Restore word |
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| 473 | neg ax ; Negative to positive |
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| 474 | jmp Print_ContinueFromIntSW |
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| 475 | %endif |
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| 476 | |
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| 477 | %ifdef USE_PRINT_INTUW or USE_PRINT_INTSW |
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| 478 | ALIGN JUMP_ALIGN |
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| 479 | Print_IntUW: |
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| 480 | push di ; Store DI |
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| 481 | xor di, di ; Zero character counter |
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| 482 | Print_ContinueFromIntSW: |
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| 483 | push bx ; Store BX |
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| 484 | push cx ; Store CX |
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| 485 | mov bx, 10 ; Load divisor to BX |
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| 486 | mov cx, 5 ; Load number of divisions to CX |
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| 487 | ALIGN JUMP_ALIGN |
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| 488 | .DivLoop: |
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| 489 | xor dx, dx ; Zero DX for division |
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| 490 | div bx ; DX:AX / 10 => AX=quot, DX=rem |
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| 491 | push dx ; Push digit |
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| 492 | loop .DivLoop ; Loop to separate all characters |
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| 493 | xor bx, bx ; First char printed flag |
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| 494 | mov cl, 5 ; Load number of characters to CL |
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| 495 | ALIGN JUMP_ALIGN |
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| 496 | .PrintLoop: |
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| 497 | pop dx ; Pop character to DX |
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| 498 | or bx, dx ; Still skipping zeroes? |
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| 499 | loopz .PrintLoop ; If so, loop |
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| 500 | add dx, '0' ; Digit to character |
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| 501 | PRINT_CHAR ; Print character |
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| 502 | inc di ; Increment chars printed |
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[181] | 503 | inc cx ; Characters left |
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| 504 | loop .PrintLoop ; If so, loop |
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[2] | 505 | mov dx, di ; Copy chars printed to DX |
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| 506 | pop cx |
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| 507 | pop bx |
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| 508 | pop di |
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| 509 | ret |
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| 510 | %endif |
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| 511 | |
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| 512 | |
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| 513 | ;-------------------------------------------------------------------- |
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| 514 | ; Prints unsigned 32-bit integer. |
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[181] | 515 | ; |
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[2] | 516 | ; Print_IntUDW |
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| 517 | ; Parameters: |
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| 518 | ; DX:AX: 32-bit unsigned integer to print |
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| 519 | ; Returns: |
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| 520 | ; DX: Number of characters printed |
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| 521 | ; Corrupts registers: |
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| 522 | ; AX |
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| 523 | ;-------------------------------------------------------------------- |
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| 524 | %ifdef USE_PRINT_INTUDW |
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| 525 | ALIGN JUMP_ALIGN |
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| 526 | Print_IntUDW: |
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| 527 | push di ; Store DI |
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| 528 | push si ; Store SI |
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| 529 | push bx ; Store BX |
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| 530 | push cx ; Store CX |
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| 531 | mov cx, 10 ; Load divider to CX |
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| 532 | mov si, cx ; Load number of divisions (10) to SI |
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| 533 | xor di, di ; Zero DI (char counter) |
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| 534 | ALIGN JUMP_ALIGN |
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| 535 | .DivLoop: |
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| 536 | call Math_DivDWbyW ; DX:AX / 10 => DX:AX=quot, BX=rem |
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| 537 | push bx ; Push digit |
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| 538 | dec si ; Decrement number of divisions |
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| 539 | jnz .DivLoop ; Loop while divisions left |
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| 540 | xor bx, bx ; First char printed flag |
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| 541 | ALIGN JUMP_ALIGN |
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| 542 | .PrintLoop: |
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| 543 | pop dx ; Pop character to DX |
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| 544 | or bx, dx ; Still skipping zeroes? |
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| 545 | loopz .PrintLoop ; If so, loop |
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| 546 | add dx, '0' ; Digit to character |
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| 547 | PRINT_CHAR ; Print character |
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| 548 | inc di ; Increment chars printed |
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[181] | 549 | inc cx ; Characters left |
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| 550 | loop .PrintLoop ; If so, loop |
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[2] | 551 | mov dx, di ; Copy characters printed to DX |
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| 552 | pop cx |
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| 553 | pop bx |
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| 554 | pop si |
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| 555 | pop di |
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| 556 | ret |
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| 557 | %endif |
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| 558 | |
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| 559 | |
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| 560 | ;-------------------------------------------------------------------- |
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| 561 | ; Prints 8-bit byte as hexadecimal string. |
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[181] | 562 | ; |
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[2] | 563 | ; Print_IntHexB |
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| 564 | ; Parameters: |
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| 565 | ; AL: 8-bit BYTE to print |
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| 566 | ; Returns: |
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| 567 | ; DX: Number of characters printed |
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| 568 | ; Corrupts registers: |
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| 569 | ; AX |
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| 570 | ;-------------------------------------------------------------------- |
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| 571 | %ifdef USE_PRINT_INTHEXB |
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| 572 | ALIGN JUMP_ALIGN |
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| 573 | Print_IntHexB: |
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| 574 | push bx |
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| 575 | xor ah, ah ; Zero AH, AX=word to print |
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| 576 | mov bx, 0FFh ; Set to print two digits |
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| 577 | call Print_HexString ; Print hex string |
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| 578 | push dx ; Store number of chars printed |
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| 579 | mov dl, 'h' ; Print 'h' at the end |
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| 580 | PRINT_CHAR |
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| 581 | pop dx ; Restore number of chars printed |
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| 582 | inc dx ; Increment for 'h' |
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| 583 | pop bx |
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| 584 | ret |
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| 585 | %endif |
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| 586 | |
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| 587 | |
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| 588 | ;-------------------------------------------------------------------- |
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| 589 | ; Prints 16-bit word as hexadecimal string. |
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[181] | 590 | ; |
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[2] | 591 | ; Print_IntHexW |
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| 592 | ; Parameters: |
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| 593 | ; AX: 16-bit WORD to print |
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| 594 | ; Returns: |
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| 595 | ; DX: Number of characters printed |
---|
| 596 | ; Corrupts registers: |
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| 597 | ; AX |
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| 598 | ;-------------------------------------------------------------------- |
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| 599 | %ifdef USE_PRINT_INTHEXW |
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| 600 | ALIGN JUMP_ALIGN |
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| 601 | Print_IntHexW: |
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| 602 | push bx |
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| 603 | xor bx, bx ; Set to print all zeroes... |
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| 604 | dec bx ; ...BX = FFFFh |
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| 605 | call Print_HexString ; Print hex string |
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| 606 | push dx ; Store number of chars printed |
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| 607 | mov dl, 'h' ; Print 'h' at the end |
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| 608 | PRINT_CHAR |
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| 609 | pop dx ; Restore number of chars printed |
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| 610 | inc dx ; Increment for 'h' |
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| 611 | pop bx |
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| 612 | ret |
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| 613 | %endif |
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| 614 | |
---|
| 615 | |
---|
| 616 | ;-------------------------------------------------------------------- |
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| 617 | ; Prints 32-bit dword as hexadecimal string. |
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[181] | 618 | ; |
---|
[2] | 619 | ; Print_IntHexDW |
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| 620 | ; Parameters: |
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| 621 | ; DX:AX: 32-bit DWORD to print |
---|
| 622 | ; Returns: |
---|
| 623 | ; DX: Number of characters printed |
---|
| 624 | ; Corrupts registers: |
---|
| 625 | ; AX |
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| 626 | ;-------------------------------------------------------------------- |
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| 627 | %ifdef USE_PRINT_INTHEXDW |
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| 628 | ALIGN JUMP_ALIGN |
---|
| 629 | Print_IntHexDW: |
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| 630 | push cx |
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| 631 | push bx |
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| 632 | push ax ; Store loword |
---|
| 633 | mov ax, dx ; Copy hiword to AX |
---|
| 634 | xor bx, bx ; Set to print all zeroes... |
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| 635 | dec bx ; ...BX = FFFFh |
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| 636 | call Print_HexString ; Print hex string |
---|
| 637 | mov cx, dx ; Copy number of chars printed |
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| 638 | pop ax ; Pop loword |
---|
| 639 | call Print_HexString ; Print hex string |
---|
| 640 | add cx, dx ; Add number of chars printed |
---|
| 641 | mov dl, 'h' ; Print 'h' at the end |
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| 642 | PRINT_CHAR |
---|
| 643 | inc cx ; Increment number of chars printed |
---|
| 644 | mov dx, cx ; Copy number of chars printed to DX |
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| 645 | pop bx |
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| 646 | pop cx |
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| 647 | ret |
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| 648 | %endif |
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| 649 | |
---|
| 650 | |
---|
| 651 | ;-------------- Private functions -------------------- |
---|
| 652 | |
---|
| 653 | ;-------------------------------------------------------------------- |
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| 654 | ; Prints hexadecimal character for every nybble for WORD. |
---|
[181] | 655 | ; |
---|
[2] | 656 | ; Print_HexString |
---|
| 657 | ; Parameters: |
---|
| 658 | ; AX: 16-bit WORD to print |
---|
| 659 | ; BX: Mask for zero nybbles to print: |
---|
| 660 | ; FFFFh = prints all digits |
---|
| 661 | ; 0FFFh = does not print digit 3 if it is zero |
---|
| 662 | ; 00FFh = does not print digits 3 and 2 if both are zeroes |
---|
| 663 | ; 000Fh = prints only digit 0 if other are zeroes |
---|
| 664 | ; 0000h = prints nothing if value is zero |
---|
| 665 | ; Returns: |
---|
| 666 | ; DX: Number of characters printed |
---|
| 667 | ; Corrupts registers: |
---|
| 668 | ; AX |
---|
| 669 | ;-------------------------------------------------------------------- |
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| 670 | %ifdef USE_PRINT_INTHEXB or USE_PRINT_INTHEXW or USE_PRINT_INTHEXDW |
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| 671 | ALIGN JUMP_ALIGN |
---|
| 672 | Print_HexString: |
---|
| 673 | push bp |
---|
| 674 | push di |
---|
| 675 | push si |
---|
| 676 | push cx |
---|
| 677 | |
---|
| 678 | mov di, ax ; Backup WORD to DI |
---|
| 679 | mov cl, 12 ; Prepare to shift nybbles |
---|
| 680 | xor dx, dx ; Zero DX |
---|
| 681 | ALIGN JUMP_ALIGN |
---|
| 682 | .NybbleLoop: |
---|
| 683 | mov bp, bx ; Copy mask to BP |
---|
| 684 | mov si, di ; Copy WORD to SI |
---|
| 685 | shr bp, cl ; Shift wanted mask nybble to BP |
---|
| 686 | shr si, cl ; Shift wanted nybble to SI |
---|
| 687 | and bp, 0Fh ; Clear unwanted mask bits |
---|
| 688 | and si, 0Fh ; Clear unwanted bits |
---|
| 689 | or bp, si ; Skip zeroes in front? |
---|
| 690 | jz .SkipPrint ; If so, skip printing |
---|
| 691 | mov dl, [cs:si+g_rgbHex]; Load char to DL |
---|
| 692 | PRINT_CHAR ; Print character |
---|
| 693 | inc dh ; Increment characters printed |
---|
| 694 | .SkipPrint: |
---|
| 695 | sub cl, 4 ; Prepare to shift next nybble |
---|
| 696 | jnc .NybbleLoop ; Loop while nybbles left |
---|
| 697 | mov dl, dh ; Copy chars printed to DL |
---|
| 698 | xor dh, dh ; Zero DH |
---|
| 699 | |
---|
| 700 | pop cx |
---|
| 701 | pop si |
---|
| 702 | pop di |
---|
| 703 | pop bp |
---|
| 704 | ret |
---|
| 705 | %endif |
---|