| 1 | ; File name : PrintString.asm
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| 2 | ; Project name : IDE BIOS
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| 3 | ; Created date : 19.3.2010
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| 4 | ; Last update : 31.3.2010
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| 5 | ; Author : Tomi Tilli
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| 6 | ; Description : Functions for printing strings used in this IDE BIOS.
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| 7 |
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| 8 |
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| 9 | ; Section containing code
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| 10 | SECTION .text
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| 11 |
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| 12 | ;--------------------------------------------------------------------
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| 13 | ; Prints string with formatting parameters.
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| 14 | ; Do not call PrintString_JumpToFormat!!! Jump there only!
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| 15 | ;
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| 16 | ; PrintString_JumpToFormat
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| 17 | ; Parameters:
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| 18 | ; DH: Number of bytes pushed to stack
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| 19 | ; CS:SI: Ptr to string to format
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| 20 | ; Stack: Parameters for formatting placeholders.
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| 21 | ; Parameter for first placeholder must be pushed last
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| 22 | ; (to top of stack).
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| 23 | ; High word must be pushed first for 32-bit parameters.
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| 24 | ; Returns:
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| 25 | ; Nothing
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| 26 | ; Corrupts registers:
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| 27 | ; AX, CX, DX, SI
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| 28 | ;--------------------------------------------------------------------
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| 29 | ALIGN JUMP_ALIGN
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| 30 | PrintString_JumpToFormat:
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| 31 | mov cx, ds ; Backup DS
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| 32 | push cs ; Push string segment...
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| 33 | pop ds ; ...and pop it to DS
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| 34 | mov dl, ' ' ; Min length character
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| 35 | call Print_Format
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| 36 | mov ds, cx ; Restore DS
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| 37 | eMOVZX ax, dh ; Bytes in stack
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| 38 | add sp, ax ; Clean stack
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| 39 | ret
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| 40 |
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| 41 |
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| 42 | ;--------------------------------------------------------------------
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| 43 | ; Prints STOP terminated string from wanted segment.
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| 44 | ;
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| 45 | ; PrintString_FromCS
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| 46 | ; PrintString_FromES
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| 47 | ; PrintString_FromDS
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| 48 | ; Parameters:
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| 49 | ; SI: Offset to string to print
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| 50 | ; Returns:
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| 51 | ; Nothing
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| 52 | ; Corrupts registers:
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| 53 | ; AX, DX
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| 54 | ;--------------------------------------------------------------------
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| 55 | ALIGN JUMP_ALIGN
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| 56 | PrintString_FromCS:
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| 57 | push ds
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| 58 | push cs ; Push string segment...
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| 59 | pop ds ; ...and pop it to DS
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| 60 | call PrintString_FromDS
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| 61 | pop ds
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| 62 | ret
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| 63 |
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| 64 | ALIGN JUMP_ALIGN
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| 65 | PrintString_FromES:
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| 66 | push ds
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| 67 | push es ; Push string segment...
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| 68 | pop ds ; ...and pop it to DS
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| 69 | call PrintString_FromDS
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| 70 | pop ds
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| 71 | ret
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| 72 |
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| 73 | ALIGN JUMP_ALIGN
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| 74 | PrintString_FromDS:
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| 75 | mov dx, si ; DS:DX now points to string
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| 76 | PRINT_STR_LEN
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| 77 | ret
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