[3] | 1 | ; File name : print.asm |
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| 2 | ; Project name : Print library |
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| 3 | ; Created date : 6.10.2009 |
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[77] | 4 | ; Last update : 4.1.2011 |
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| 5 | ; Author : Tomi Tilli, |
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| 6 | ; : Krister Nordvall (optimizations) |
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| 7 | ; Description : ASM library for character and string |
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[3] | 8 | ; printing related functions. |
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| 9 | |
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| 10 | ;--------------- Equates ----------------------------- |
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| 11 | |
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| 12 | ; String library function to include |
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| 13 | %define USE_PRINT_FORMAT ; Print_Format |
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| 14 | %define USE_PRINT_NEWLINE ; Print_Newline |
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| 15 | ;%define USE_PRINT_CHARBUFFER ; Print_CharBuffer |
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| 16 | %define USE_PRINT_REPEAT ; Print_Repeat |
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| 17 | ;%define USE_PRINT_BOOL ; Print_Bool |
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| 18 | ;%define USE_PRINT_INTSW ; Print_IntSW |
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| 19 | %define USE_PRINT_INTUW ; Print_IntUW |
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| 20 | ;%define USE_PRINT_INTUDW ; Print_IntUDW |
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| 21 | %define USE_PRINT_INTHEXB ; Print_IntHexB |
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| 22 | %define USE_PRINT_INTHEXW ; Print_IntHexW |
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| 23 | ;%define USE_PRINT_INTHEXDW ; Print_IntHexDW |
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| 24 | |
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| 25 | |
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| 26 | ; Text mode character attribute byte bits for CGA+ |
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| 27 | FLG_CGA_FG_B EQU (1<<0) |
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| 28 | FLG_CGA_FG_G EQU (1<<1) |
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| 29 | FLG_CGA_FG_R EQU (1<<2) |
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| 30 | FLG_CGA_FG_I EQU (1<<3) |
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| 31 | FLG_CGA_BG_B EQU (1<<4) |
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| 32 | FLG_CGA_BG_G EQU (1<<5) |
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| 33 | FLG_CGA_BG_R EQU (1<<6) |
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| 34 | FLG_CGA_BG_I EQU (1<<7) |
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| 35 | FLG_CGA_BG_BLNK EQU (1<<7) ; Blinking is default |
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| 36 | |
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| 37 | ; Text mode character attribute bytes for MDA/Hercules (mono) |
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| 38 | ; *Not displayed on some monitors |
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| 39 | ATTR_MDA_HIDDEN EQU 00h ; Not displayed |
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| 40 | ATTR_MDA_ULINE EQU 01h ; Underlined |
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| 41 | ATTR_MDA_NORMAL EQU 07h ; Normal (white on black) |
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| 42 | ATTR_MDA_INT_U EQU 09h ; High intensity, underlined |
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| 43 | ATTR_MDA_INT EQU 0Fh ; High intensity |
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| 44 | ATTR_MDA_REVERSE EQU 70h ; Reverse video (black on white) |
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| 45 | ATTR_MDA_BLNK EQU 87h ; Blinking white on black* |
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| 46 | ATTR_MDA_BLNK_INT EQU 8Fh ; Blinking high intensity* |
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| 47 | ATTR_MDA_BLNK_REV EQU 0F0h; Blinking reverse video |
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| 48 | |
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| 49 | |
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| 50 | ;-------------- Private global variables ------------- |
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| 51 | ; Section containing initialized data |
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| 52 | ;SECTION .data |
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| 53 | |
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| 54 | g_rgbHex: db "0123456789ABCDEF" ; Hexadecimal printing |
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| 55 | g_rgbFormat: ; Placeholders for Print_Format |
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| 56 | %ifdef USE_PRINT_INTSW |
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| 57 | db 'd' ; Prints signed 16-bit integer (WORD) |
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| 58 | %endif |
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| 59 | %ifdef USE_PRINT_INTUW |
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| 60 | db 'u' ; Prints unsigned 16-bit integer (WORD) |
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| 61 | %endif |
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| 62 | %ifdef USE_PRINT_INTUDW |
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| 63 | db 'U' ; Prints unsigned 32-bit integer (DWORD) |
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| 64 | %endif |
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| 65 | %ifdef USE_PRINT_INTHEXW |
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| 66 | db 'x' ; Prints 8- or 16-bit hexadecimal (BYTE, WORD) |
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| 67 | %endif |
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| 68 | %ifdef USE_PRINT_INTHEXDW |
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| 69 | db 'X' ; Prints 32-bit hexadecimal (DWORD) |
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| 70 | %endif |
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| 71 | db 's' ; Prints string (DS segment) |
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| 72 | db 'S' ; Prints string (far pointer) |
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| 73 | %ifdef USE_PRINT_BOOL |
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| 74 | db 'b' ; Prints boolean value 0 or 1 |
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| 75 | %endif |
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| 76 | db 'c' ; Prints character |
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| 77 | db 'C' ; Prints character number of times |
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| 78 | _g_rgbFormatEnd: |
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| 79 | |
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| 80 | ; Number of different placeholders for Print_Format |
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| 81 | CNT_PLCEHLDRS EQU (_g_rgbFormatEnd-g_rgbFormat) |
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| 82 | |
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| 83 | |
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| 84 | |
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| 85 | ;-------------- Public functions --------------------- |
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| 86 | ; Section containing code |
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| 87 | SECTION .text |
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| 88 | |
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| 89 | ; Include one file to use DOS, BIOS or VRAM macros and functions |
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| 90 | ;%include "prntdos.asm" ; Include to use DOS printing functions |
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| 91 | %include "prntbios.asm" ; Include to use BIOS printing functions |
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| 92 | ;%include "prntvram.asm" ; Include to access VRAM directly |
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| 93 | |
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| 94 | |
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| 95 | ;-------------------------------------------------------------------- |
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| 96 | ; Debugging macro that prints wanted character and newline. |
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| 97 | ; |
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| 98 | ; PRINT_DBG_CH |
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| 99 | ; Parameters: |
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| 100 | ; %1: Character to print |
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| 101 | ; Returns: |
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| 102 | ; Nothing |
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| 103 | ; Corrupts registers: |
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| 104 | ; Nothing |
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| 105 | ;-------------------------------------------------------------------- |
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| 106 | %macro PRINT_DBG_CH 1 |
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| 107 | pushf |
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| 108 | push dx |
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| 109 | push ax |
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| 110 | mov dl, %1 |
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| 111 | PRINT_CHAR |
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| 112 | ;mov dl, CR |
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| 113 | ;PRINT_CHAR |
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| 114 | ;mov dl, LF |
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| 115 | ;PRINT_CHAR |
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| 116 | pop ax |
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| 117 | pop dx |
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| 118 | popf |
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| 119 | %endmacro |
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| 120 | |
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| 121 | |
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| 122 | ;-------------------------------------------------------------------- |
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| 123 | ; Simplified printf-style string formatting function. |
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| 124 | ; Strings must end to STOP character. |
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| 125 | ; Supports following formatting types: |
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| 126 | ; %d Prints signed 16-bit integer (WORD) |
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| 127 | ; %u Prints unsigned 16-bit integer (WORD) |
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| 128 | ; %U Prints unsigned 32-bit integer (DWORD) |
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| 129 | ; %x Prints 8- or 16-bit hexadecimal (BYTE, WORD) |
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| 130 | ; %X Prints 32-bit hexadecimal (DWORD) |
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| 131 | ; %s Prints string (DS segment) |
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| 132 | ; %S Prints string (far pointer) |
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| 133 | ; %b Prints boolean value 0 or 1 |
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| 134 | ; %c Prints character |
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| 135 | ; %[num]C Prints character number of times (up to 256, 0=256) |
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| 136 | ; %% Prints '%' character (no parameter pushed) |
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| 137 | ; |
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| 138 | ; Any placeholder can be set to minimum length by specifying |
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| 139 | ; minimum number of characters. For example %8d would append spaces |
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| 140 | ; after integer so that at least 8 characters would be printed. |
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| 141 | ; |
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| 142 | ; NOTE! Caller must clean the stack variables! |
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| 143 | ; |
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| 144 | ; Print_Format |
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| 145 | ; Parameters: |
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| 146 | ; DL: Min length character (usually space) |
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| 147 | ; DS:SI: Pointer to string to format |
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| 148 | ; Stack: Parameters for formatting placeholders. |
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| 149 | ; Parameter for first placeholder must be pushed last |
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| 150 | ; (to top of stack). |
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| 151 | ; High word must be pushed first for 32-bit parameters. |
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| 152 | ; Returns: |
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| 153 | ; Nothing |
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| 154 | ; Corrupts registers: |
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| 155 | ; AX, SI |
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| 156 | ;-------------------------------------------------------------------- |
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| 157 | %ifdef USE_PRINT_FORMAT |
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| 158 | ALIGN JUMP_ALIGN |
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| 159 | Print_Format: |
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| 160 | push es |
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| 161 | push bp |
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| 162 | push di |
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| 163 | push cx |
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| 164 | push dx ; Push min length character |
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| 165 | push cs ; Copy CS... |
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| 166 | pop es ; ...to ES |
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| 167 | mov bp, sp ; Copy SP to BP |
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| 168 | add bp, 2*6 ; Set BP to point first stack parameter |
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| 169 | cld ; Set LODSB to increment SI |
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| 170 | ALIGN JUMP_ALIGN |
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| 171 | .PrintLoop: ; Load characters from string |
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| 172 | lodsb ; Load char from DS:SI to AL, increment SI |
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| 173 | xor cx, cx ; Zero minimum length |
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| 174 | cmp al, STOP ; End of string? |
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| 175 | je .Return ; If so, return |
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| 176 | cmp al, '%' ; Format placeholder? |
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| 177 | je .Format ; If so, jump to format |
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| 178 | ALIGN JUMP_ALIGN |
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| 179 | .PrintChar: ; Prints single character from AL |
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| 180 | mov dl, al ; Copy character to DL |
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| 181 | PRINT_CHAR ; Print character |
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| 182 | mov dx, 1 ; One char printed |
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| 183 | ALIGN JUMP_ALIGN |
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| 184 | .PrintXtraSoMin: ; Checks how many spaces to append |
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| 185 | sub cx, dx ; Number of spaces needed |
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| 186 | jle .PrintLoop ; Read next character if no spaces needed |
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| 187 | pop dx ; Pop min length character to DL |
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| 188 | ALIGN JUMP_ALIGN |
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| 189 | .PrintSpaceLoop: ; Loop to print the required spaces |
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| 190 | PRINT_CHAR |
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| 191 | loop .PrintSpaceLoop |
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| 192 | push dx ; Store min length character |
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| 193 | jmp .PrintLoop ; Jump to read next character |
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| 194 | ALIGN JUMP_ALIGN |
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| 195 | .Return: ; The only return point for this function |
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| 196 | pop dx |
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| 197 | pop cx |
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| 198 | pop di |
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| 199 | pop bp |
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| 200 | pop es |
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| 201 | ret |
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| 202 | ALIGN JUMP_ALIGN |
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| 203 | .UpdateMinLen: ; Updates placeholder minimum length |
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| 204 | mov al, ah ; Copy digit to AL |
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| 205 | mov ah, cl ; Copy previous length to AH |
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| 206 | aad ; AL=10*AH+AL, AH=0 |
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| 207 | mov cx, ax ; Copy new length to CX |
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| 208 | ALIGN JUMP_ALIGN |
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| 209 | .Format: |
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| 210 | lodsb ; Load char from DS:SI to AL, increment SI |
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| 211 | cmp al, STOP |
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| 212 | je .Return ; Invalid string |
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| 213 | mov ah, al ; Copy char to AH |
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| 214 | sub ah, '0' ; Possible digit char to digit |
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| 215 | cmp ah, 9 ; Was valid digit? |
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| 216 | jbe .UpdateMinLen ; If so, jump to update minimum length |
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| 217 | push cx ; Store number of spaces needed |
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| 218 | mov cx, CNT_PLCEHLDRS ; Load number of placeholders to CX |
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| 219 | mov di, g_rgbFormat ; Load offset to format placeholder table |
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| 220 | repne scasb ; Compare AL to [ES:DI] until match |
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| 221 | pop cx ; Restore spaces needed |
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| 222 | jne .PrintChar ; If no match, jump to print character |
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| 223 | sub di, g_rgbFormat+1 ; To placeholder index |
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| 224 | shl di, 1 ; Shift for word lookup |
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| 225 | jmp [cs:di+.g_rgwFormJump] ; Jump to format |
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| 226 | |
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| 227 | %ifdef USE_PRINT_INTSW |
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| 228 | ALIGN JUMP_ALIGN |
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| 229 | .Print_d: ; Print signed 16-bit integer |
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| 230 | mov ax, [bp] ; Load word to print |
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| 231 | times 2 inc bp |
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| 232 | call Print_IntSW |
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| 233 | jmp .PrintXtraSoMin |
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| 234 | %endif |
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| 235 | %ifdef USE_PRINT_INTUW |
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| 236 | ALIGN JUMP_ALIGN |
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| 237 | .Print_u: ; Print unsigned 16-bit integer |
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| 238 | mov ax, [bp] ; Load word to print |
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| 239 | times 2 inc bp |
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| 240 | call Print_IntUW |
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| 241 | jmp .PrintXtraSoMin |
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| 242 | %endif |
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| 243 | %ifdef USE_PRINT_INTUDW |
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| 244 | ALIGN JUMP_ALIGN |
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| 245 | .Print_U: ; Print unsigned 32-bit integer |
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| 246 | mov ax, [bp] ; Load loword |
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| 247 | mov dx, [bp+2] ; Load hiword |
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| 248 | add bp, 4 |
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| 249 | call Print_IntUDW |
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| 250 | jmp .PrintXtraSoMin |
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| 251 | %endif |
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| 252 | %ifdef USE_PRINT_INTHEXW |
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| 253 | ALIGN JUMP_ALIGN |
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| 254 | .Print_x: ; Prints 8- or 16-bit hexadecimal |
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| 255 | mov ax, [bp] ; Load word to print |
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| 256 | times 2 inc bp |
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| 257 | %ifdef USE_PRINT_INTHEXB |
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| 258 | test ah, ah ; 16-bit hexadecimal? |
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| 259 | jnz .Print_x16 ; If so, jump to print it |
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| 260 | call Print_IntHexB |
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| 261 | jmp .PrintXtraSoMin |
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| 262 | .Print_x16: |
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| 263 | %endif |
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| 264 | call Print_IntHexW |
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| 265 | jmp .PrintXtraSoMin |
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| 266 | %endif |
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| 267 | %ifdef USE_PRINT_INTHEXDW |
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| 268 | ALIGN JUMP_ALIGN |
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| 269 | .Print_X: ; Prints 32-bit hexadecimal |
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| 270 | mov ax, [bp] ; Load loword |
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| 271 | mov dx, [bp+2] ; Load hiword |
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| 272 | add bp, 4 |
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| 273 | call Print_IntHexDW |
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| 274 | jmp .PrintXtraSoMin |
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| 275 | %endif |
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| 276 | ALIGN JUMP_ALIGN |
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| 277 | .Print_s: ; Prints string from DS segment |
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| 278 | mov dx, [bp] ; Load offset to string |
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| 279 | times 2 inc bp |
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| 280 | PRINT_STR_LEN ; Print string |
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| 281 | jmp .PrintXtraSoMin |
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| 282 | ALIGN JUMP_ALIGN |
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| 283 | .Print_S: ; Prints string using far pointer |
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| 284 | push ds ; Store DS |
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| 285 | mov dx, [bp] ; Load offset to string |
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| 286 | mov ds, [bp+2] ; Load segment to string |
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| 287 | add bp, 4 |
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| 288 | PRINT_STR_LEN ; Print string |
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| 289 | pop ds ; Restore DS |
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| 290 | jmp .PrintXtraSoMin |
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| 291 | %ifdef USE_PRINT_BOOL |
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| 292 | ALIGN JUMP_ALIGN |
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| 293 | .Print_b: ; Prints boolean value |
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| 294 | mov ax, [bp] ; Load boolean value to print |
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| 295 | times 2 inc bp |
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| 296 | call Print_Bool |
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| 297 | jmp .PrintXtraSoMin |
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| 298 | %endif |
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| 299 | ALIGN JUMP_ALIGN |
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| 300 | .Print_c: ; Prints character |
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| 301 | mov ax, [bp] ; Load character to print |
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| 302 | times 2 inc bp |
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| 303 | jmp .PrintChar ; Jump to print character |
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| 304 | ALIGN JUMP_ALIGN |
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| 305 | .Print_C: |
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| 306 | mov dx, [bp] ; Load character to print |
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| 307 | times 2 inc bp |
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| 308 | ALIGN JUMP_ALIGN |
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| 309 | .CharLoop: |
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| 310 | PRINT_CHAR |
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| 311 | loop .CharLoop |
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| 312 | jmp .PrintLoop |
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| 313 | |
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| 314 | ALIGN JUMP_ALIGN |
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| 315 | .g_rgwFormJump: ; Jump table for Print_Format |
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| 316 | %ifdef USE_PRINT_INTSW |
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| 317 | dw .Print_d |
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| 318 | %endif |
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| 319 | %ifdef USE_PRINT_INTUW |
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| 320 | dw .Print_u |
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| 321 | %endif |
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| 322 | %ifdef USE_PRINT_INTUDW |
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| 323 | dw .Print_U |
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| 324 | %endif |
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| 325 | %ifdef USE_PRINT_INTHEXW |
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| 326 | dw .Print_x |
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| 327 | %endif |
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| 328 | %ifdef USE_PRINT_INTHEXDW |
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| 329 | dw .Print_X |
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| 330 | %endif |
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| 331 | dw .Print_s |
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| 332 | dw .Print_S |
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| 333 | %ifdef USE_PRINT_BOOL |
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| 334 | dw .Print_b |
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| 335 | %endif |
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| 336 | dw .Print_c |
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| 337 | dw .Print_C |
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| 338 | %endif |
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| 339 | |
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| 340 | |
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| 341 | ;-------------------------------------------------------------------- |
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| 342 | ; Prints newline character to change line. |
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| 343 | ; |
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| 344 | ; Print_Newline |
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| 345 | ; Parameters: |
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| 346 | ; Nothing |
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| 347 | ; Returns: |
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| 348 | ; Nothing |
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| 349 | ; Corrupts registers: |
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| 350 | ; Nothing |
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| 351 | ;-------------------------------------------------------------------- |
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| 352 | %ifdef USE_PRINT_NEWLINE |
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| 353 | ALIGN JUMP_ALIGN |
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| 354 | Print_Newline: |
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| 355 | push ax |
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| 356 | push dx |
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| 357 | mov dl, LF |
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| 358 | PRINT_CHAR |
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| 359 | mov dl, CR |
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| 360 | PRINT_CHAR |
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| 361 | pop dx |
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| 362 | pop ax |
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| 363 | ret |
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| 364 | %endif |
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| 365 | |
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| 366 | |
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| 367 | ;-------------------------------------------------------------------- |
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| 368 | ; Prints wanted number of characters. |
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| 369 | ; |
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| 370 | ; Print_CharBuffer |
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| 371 | ; Parameters: |
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| 372 | ; CX: Number of characters to print |
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| 373 | ; ES:DI: Ptr to character buffer |
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| 374 | ; Returns: |
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| 375 | ; Nothing |
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| 376 | ; Corrupts registers: |
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| 377 | ; AX, CX |
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| 378 | ;-------------------------------------------------------------------- |
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| 379 | %ifdef USE_PRINT_CHARBUFFER |
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| 380 | ALIGN JUMP_ALIGN |
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| 381 | Print_CharBuffer: |
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| 382 | jcxz .Return |
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| 383 | push ds |
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| 384 | push si |
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| 385 | push dx |
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| 386 | push es |
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| 387 | pop ds |
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| 388 | mov si, di |
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| 389 | cld ; LODSB to increment SI |
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| 390 | ALIGN JUMP_ALIGN |
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| 391 | .Rep: |
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| 392 | lodsb ; Load from [DS:SI] to AL |
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| 393 | mov dl, al ; Copy to DL for printing |
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| 394 | PRINT_CHAR |
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| 395 | loop .Rep |
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| 396 | pop dx |
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| 397 | pop si |
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| 398 | pop ds |
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| 399 | .Return: |
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| 400 | ret |
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| 401 | %endif |
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| 402 | |
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| 403 | |
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| 404 | ;-------------------------------------------------------------------- |
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| 405 | ; Repeats wanted character. |
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| 406 | ; |
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| 407 | ; Print_Repeat |
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| 408 | ; Parameters: |
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| 409 | ; CX: Number of times to repeat character |
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| 410 | ; DL: Character to repeat |
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| 411 | ; Returns: |
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| 412 | ; Nothing |
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| 413 | ; Corrupts registers: |
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| 414 | ; AX, CX |
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| 415 | ;-------------------------------------------------------------------- |
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| 416 | %ifdef USE_PRINT_REPEAT |
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| 417 | ALIGN JUMP_ALIGN |
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| 418 | Print_Repeat: |
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| 419 | jcxz .Return |
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| 420 | ALIGN JUMP_ALIGN |
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| 421 | .Rep: |
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| 422 | PRINT_CHAR |
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| 423 | loop .Rep |
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| 424 | .Return: |
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| 425 | ret |
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| 426 | %endif |
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| 427 | |
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| 428 | |
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| 429 | ;-------------------------------------------------------------------- |
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| 430 | ; Prints boolean value. |
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| 431 | ; |
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| 432 | ; Print_Bool |
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| 433 | ; Parameters: |
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| 434 | ; AX: Boolean value (0=FALSE, non-zero=TRUE) |
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| 435 | ; Returns: |
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| 436 | ; DX: Number of characters printed |
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| 437 | ; Corrupts registers: |
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| 438 | ; AX |
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| 439 | ;-------------------------------------------------------------------- |
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| 440 | %ifdef USE_PRINT_BOOL |
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| 441 | ALIGN JUMP_ALIGN |
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| 442 | Print_Bool: |
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| 443 | mov dl, '0' ; Assume FALSE |
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| 444 | test ax, ax ; Is FALSE? |
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| 445 | jz .Print ; If so, jump to print |
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| 446 | inc dx ; Increment to '1' |
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| 447 | ALIGN JUMP_ALIGN |
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| 448 | .Print: |
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| 449 | PRINT_CHAR |
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| 450 | mov dx, 1 ; One character printed |
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| 451 | ret |
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| 452 | %endif |
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| 453 | |
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| 454 | |
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| 455 | ;-------------------------------------------------------------------- |
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| 456 | ; Prints signed or unsigned 16-bit integer. |
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| 457 | ; |
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| 458 | ; Print_IntSW Prints signed 16-bit word |
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| 459 | ; Print_IntUW Prints unsigned 16-bit word |
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| 460 | ; Parameters: |
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| 461 | ; AX: Word to print |
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| 462 | ; Returns: |
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| 463 | ; DX: Number of characters printed |
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| 464 | ; Corrupts registers: |
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| 465 | ; AX |
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| 466 | ;-------------------------------------------------------------------- |
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| 467 | %ifdef USE_PRINT_INTSW |
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| 468 | ALIGN JUMP_ALIGN |
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| 469 | Print_IntSW: |
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[77] | 470 | test ax, ax ; Positive integer? |
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| 471 | jns Print_IntUW ; If so, jump to print it |
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[3] | 472 | push di ; Store DI |
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| 473 | push ax ; Store word |
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| 474 | mov dl, '-' ; Print '-' |
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| 475 | PRINT_CHAR |
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| 476 | mov di, 1 ; One character printed |
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| 477 | pop ax ; Restore word |
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| 478 | neg ax ; Negative to positive |
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| 479 | jmp Print_ContinueFromIntSW |
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| 480 | %endif |
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| 481 | |
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| 482 | %ifdef USE_PRINT_INTUW or USE_PRINT_INTSW |
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| 483 | ALIGN JUMP_ALIGN |
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| 484 | Print_IntUW: |
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| 485 | push di ; Store DI |
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| 486 | xor di, di ; Zero character counter |
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| 487 | Print_ContinueFromIntSW: |
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| 488 | push bx ; Store BX |
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| 489 | push cx ; Store CX |
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| 490 | mov bx, 10 ; Load divisor to BX |
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| 491 | mov cx, 5 ; Load number of divisions to CX |
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| 492 | ALIGN JUMP_ALIGN |
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| 493 | .DivLoop: |
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| 494 | xor dx, dx ; Zero DX for division |
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| 495 | div bx ; DX:AX / 10 => AX=quot, DX=rem |
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| 496 | push dx ; Push digit |
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| 497 | loop .DivLoop ; Loop to separate all characters |
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| 498 | xor bx, bx ; First char printed flag |
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| 499 | mov cl, 5 ; Load number of characters to CL |
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| 500 | ALIGN JUMP_ALIGN |
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| 501 | .PrintLoop: |
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| 502 | pop dx ; Pop character to DX |
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| 503 | or bx, dx ; Still skipping zeroes? |
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| 504 | loopz .PrintLoop ; If so, loop |
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| 505 | add dx, '0' ; Digit to character |
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| 506 | PRINT_CHAR ; Print character |
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| 507 | inc di ; Increment chars printed |
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| 508 | test cx, cx ; Characters left |
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| 509 | jnz .PrintLoop ; If so, loop |
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| 510 | mov dx, di ; Copy chars printed to DX |
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| 511 | pop cx |
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| 512 | pop bx |
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| 513 | pop di |
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| 514 | ret |
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| 515 | %endif |
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| 516 | |
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| 517 | |
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| 518 | ;-------------------------------------------------------------------- |
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| 519 | ; Prints unsigned 32-bit integer. |
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| 520 | ; |
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| 521 | ; Print_IntUDW |
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| 522 | ; Parameters: |
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| 523 | ; DX:AX: 32-bit unsigned integer to print |
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| 524 | ; Returns: |
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| 525 | ; DX: Number of characters printed |
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| 526 | ; Corrupts registers: |
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| 527 | ; AX |
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| 528 | ;-------------------------------------------------------------------- |
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| 529 | %ifdef USE_PRINT_INTUDW |
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| 530 | ALIGN JUMP_ALIGN |
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| 531 | Print_IntUDW: |
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| 532 | push di ; Store DI |
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| 533 | push si ; Store SI |
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| 534 | push bx ; Store BX |
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| 535 | push cx ; Store CX |
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| 536 | mov cx, 10 ; Load divider to CX |
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| 537 | mov si, cx ; Load number of divisions (10) to SI |
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| 538 | xor di, di ; Zero DI (char counter) |
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| 539 | ALIGN JUMP_ALIGN |
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| 540 | .DivLoop: |
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| 541 | call Math_DivDWbyW ; DX:AX / 10 => DX:AX=quot, BX=rem |
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| 542 | push bx ; Push digit |
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| 543 | dec si ; Decrement number of divisions |
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| 544 | jnz .DivLoop ; Loop while divisions left |
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| 545 | xor bx, bx ; First char printed flag |
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| 546 | ALIGN JUMP_ALIGN |
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| 547 | .PrintLoop: |
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| 548 | pop dx ; Pop character to DX |
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| 549 | or bx, dx ; Still skipping zeroes? |
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| 550 | loopz .PrintLoop ; If so, loop |
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| 551 | add dx, '0' ; Digit to character |
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| 552 | PRINT_CHAR ; Print character |
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| 553 | inc di ; Increment chars printed |
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| 554 | test cx, cx ; Characters left |
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| 555 | jnz .PrintLoop ; If so, loop |
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| 556 | mov dx, di ; Copy characters printed to DX |
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| 557 | pop cx |
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| 558 | pop bx |
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| 559 | pop si |
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| 560 | pop di |
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| 561 | ret |
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| 562 | %endif |
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| 563 | |
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| 564 | |
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| 565 | ;-------------------------------------------------------------------- |
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| 566 | ; Prints 8-bit byte as hexadecimal string. |
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| 567 | ; |
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| 568 | ; Print_IntHexB |
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| 569 | ; Parameters: |
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| 570 | ; AL: 8-bit BYTE to print |
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| 571 | ; Returns: |
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| 572 | ; DX: Number of characters printed |
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| 573 | ; Corrupts registers: |
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| 574 | ; AX |
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| 575 | ;-------------------------------------------------------------------- |
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| 576 | %ifdef USE_PRINT_INTHEXB |
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| 577 | ALIGN JUMP_ALIGN |
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| 578 | Print_IntHexB: |
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| 579 | push bx |
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| 580 | xor ah, ah ; Zero AH, AX=word to print |
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| 581 | mov bx, 0FFh ; Set to print two digits |
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| 582 | call Print_HexString ; Print hex string |
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| 583 | push dx ; Store number of chars printed |
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| 584 | mov dl, 'h' ; Print 'h' at the end |
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| 585 | PRINT_CHAR |
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| 586 | pop dx ; Restore number of chars printed |
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| 587 | inc dx ; Increment for 'h' |
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| 588 | pop bx |
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| 589 | ret |
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| 590 | %endif |
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| 591 | |
---|
| 592 | |
---|
| 593 | ;-------------------------------------------------------------------- |
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| 594 | ; Prints 16-bit word as hexadecimal string. |
---|
| 595 | ; |
---|
| 596 | ; Print_IntHexW |
---|
| 597 | ; Parameters: |
---|
| 598 | ; AX: 16-bit WORD to print |
---|
| 599 | ; Returns: |
---|
| 600 | ; DX: Number of characters printed |
---|
| 601 | ; Corrupts registers: |
---|
| 602 | ; AX |
---|
| 603 | ;-------------------------------------------------------------------- |
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| 604 | %ifdef USE_PRINT_INTHEXW |
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| 605 | ALIGN JUMP_ALIGN |
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| 606 | Print_IntHexW: |
---|
| 607 | push bx |
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| 608 | xor bx, bx ; Set to print all zeroes... |
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| 609 | dec bx ; ...BX = FFFFh |
---|
| 610 | call Print_HexString ; Print hex string |
---|
| 611 | push dx ; Store number of chars printed |
---|
| 612 | mov dl, 'h' ; Print 'h' at the end |
---|
| 613 | PRINT_CHAR |
---|
| 614 | pop dx ; Restore number of chars printed |
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| 615 | inc dx ; Increment for 'h' |
---|
| 616 | pop bx |
---|
| 617 | ret |
---|
| 618 | %endif |
---|
| 619 | |
---|
| 620 | |
---|
| 621 | ;-------------------------------------------------------------------- |
---|
| 622 | ; Prints 32-bit dword as hexadecimal string. |
---|
| 623 | ; |
---|
| 624 | ; Print_IntHexDW |
---|
| 625 | ; Parameters: |
---|
| 626 | ; DX:AX: 32-bit DWORD to print |
---|
| 627 | ; Returns: |
---|
| 628 | ; DX: Number of characters printed |
---|
| 629 | ; Corrupts registers: |
---|
| 630 | ; AX |
---|
| 631 | ;-------------------------------------------------------------------- |
---|
| 632 | %ifdef USE_PRINT_INTHEXDW |
---|
| 633 | ALIGN JUMP_ALIGN |
---|
| 634 | Print_IntHexDW: |
---|
| 635 | push cx |
---|
| 636 | push bx |
---|
| 637 | push ax ; Store loword |
---|
| 638 | mov ax, dx ; Copy hiword to AX |
---|
| 639 | xor bx, bx ; Set to print all zeroes... |
---|
| 640 | dec bx ; ...BX = FFFFh |
---|
| 641 | call Print_HexString ; Print hex string |
---|
| 642 | mov cx, dx ; Copy number of chars printed |
---|
| 643 | pop ax ; Pop loword |
---|
| 644 | call Print_HexString ; Print hex string |
---|
| 645 | add cx, dx ; Add number of chars printed |
---|
| 646 | mov dl, 'h' ; Print 'h' at the end |
---|
| 647 | PRINT_CHAR |
---|
| 648 | inc cx ; Increment number of chars printed |
---|
| 649 | mov dx, cx ; Copy number of chars printed to DX |
---|
| 650 | pop bx |
---|
| 651 | pop cx |
---|
| 652 | ret |
---|
| 653 | %endif |
---|
| 654 | |
---|
| 655 | |
---|
| 656 | ;-------------- Private functions -------------------- |
---|
| 657 | |
---|
| 658 | ;-------------------------------------------------------------------- |
---|
| 659 | ; Prints hexadecimal character for every nybble for WORD. |
---|
| 660 | ; |
---|
| 661 | ; Print_HexString |
---|
| 662 | ; Parameters: |
---|
| 663 | ; AX: 16-bit WORD to print |
---|
| 664 | ; BX: Mask for zero nybbles to print: |
---|
| 665 | ; FFFFh = prints all digits |
---|
| 666 | ; 0FFFh = does not print digit 3 if it is zero |
---|
| 667 | ; 00FFh = does not print digits 3 and 2 if both are zeroes |
---|
| 668 | ; 000Fh = prints only digit 0 if other are zeroes |
---|
| 669 | ; 0000h = prints nothing if value is zero |
---|
| 670 | ; Returns: |
---|
| 671 | ; DX: Number of characters printed |
---|
| 672 | ; Corrupts registers: |
---|
| 673 | ; AX |
---|
| 674 | ;-------------------------------------------------------------------- |
---|
| 675 | %ifdef USE_PRINT_INTHEXB or USE_PRINT_INTHEXW or USE_PRINT_INTHEXDW |
---|
| 676 | ALIGN JUMP_ALIGN |
---|
| 677 | Print_HexString: |
---|
| 678 | push bp |
---|
| 679 | push di |
---|
| 680 | push si |
---|
| 681 | push cx |
---|
| 682 | |
---|
| 683 | mov di, ax ; Backup WORD to DI |
---|
| 684 | mov cl, 12 ; Prepare to shift nybbles |
---|
| 685 | xor dx, dx ; Zero DX |
---|
| 686 | ALIGN JUMP_ALIGN |
---|
| 687 | .NybbleLoop: |
---|
| 688 | mov bp, bx ; Copy mask to BP |
---|
| 689 | mov si, di ; Copy WORD to SI |
---|
| 690 | shr bp, cl ; Shift wanted mask nybble to BP |
---|
| 691 | shr si, cl ; Shift wanted nybble to SI |
---|
| 692 | and bp, 0Fh ; Clear unwanted mask bits |
---|
| 693 | and si, 0Fh ; Clear unwanted bits |
---|
| 694 | or bp, si ; Skip zeroes in front? |
---|
| 695 | jz .SkipPrint ; If so, skip printing |
---|
| 696 | mov dl, [cs:si+g_rgbHex]; Load char to DL |
---|
| 697 | PRINT_CHAR ; Print character |
---|
| 698 | inc dh ; Increment characters printed |
---|
| 699 | .SkipPrint: |
---|
| 700 | sub cl, 4 ; Prepare to shift next nybble |
---|
| 701 | jnc .NybbleLoop ; Loop while nybbles left |
---|
| 702 | mov dl, dh ; Copy chars printed to DL |
---|
| 703 | xor dh, dh ; Zero DH |
---|
| 704 | |
---|
| 705 | pop cx |
---|
| 706 | pop si |
---|
| 707 | pop di |
---|
| 708 | pop bp |
---|
| 709 | ret |
---|
| 710 | %endif |
---|