| 1 | ; Project name : IDE BIOS |
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| 2 | ; Description : Functions for printing strings used in this IDE BIOS. |
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| 3 | |
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| 4 | ; Section containing code |
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| 5 | SECTION .text |
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| 6 | |
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| 7 | ;-------------------------------------------------------------------- |
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| 8 | ; Prints string with formatting parameters. |
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| 9 | ; Do not call PrintString_JumpToFormat!!! Jump there only! |
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| 10 | ; |
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| 11 | ; PrintString_JumpToFormat |
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| 12 | ; Parameters: |
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| 13 | ; DH: Number of bytes pushed to stack |
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| 14 | ; CS:SI: Ptr to string to format |
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| 15 | ; Stack: Parameters for formatting placeholders. |
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| 16 | ; Parameter for first placeholder must be pushed last |
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| 17 | ; (to top of stack). |
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| 18 | ; High word must be pushed first for 32-bit parameters. |
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| 19 | ; Returns: |
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| 20 | ; Nothing |
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| 21 | ; Corrupts registers: |
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| 22 | ; AX, CX, DX, SI |
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| 23 | ;-------------------------------------------------------------------- |
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| 24 | ALIGN JUMP_ALIGN |
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| 25 | PrintString_JumpToFormat: |
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| 26 | mov cx, ds ; Backup DS |
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| 27 | push cs ; Push string segment... |
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| 28 | pop ds ; ...and pop it to DS |
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| 29 | mov dl, ' ' ; Min length character |
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| 30 | call Print_Format |
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| 31 | mov ds, cx ; Restore DS |
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| 32 | eMOVZX ax, dh ; Bytes in stack |
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| 33 | add sp, ax ; Clean stack |
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| 34 | ret |
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| 35 | |
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| 36 | |
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| 37 | ;-------------------------------------------------------------------- |
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| 38 | ; Prints STOP terminated string from wanted segment. |
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| 39 | ; |
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| 40 | ; PrintString_FromCS |
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| 41 | ; PrintString_FromES |
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| 42 | ; PrintString_FromDS |
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| 43 | ; Parameters: |
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| 44 | ; SI: Offset to string to print |
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| 45 | ; Returns: |
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| 46 | ; Nothing |
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| 47 | ; Corrupts registers: |
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| 48 | ; AX, DX |
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| 49 | ;-------------------------------------------------------------------- |
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| 50 | ALIGN JUMP_ALIGN |
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| 51 | PrintString_FromCS: |
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| 52 | push ds |
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| 53 | push cs ; Push string segment here... |
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| 54 | SKIP2B ax ; mov ax, <next 2 bytes/instructions> |
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| 55 | PrintString_FromES: |
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| 56 | push ds |
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| 57 | push es ; ...or here... |
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| 58 | pop ds ; ...and pop it to DS |
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| 59 | call PrintString_FromDS |
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| 60 | pop ds |
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| 61 | ret |
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| 62 | |
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| 63 | ALIGN JUMP_ALIGN |
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| 64 | PrintString_FromDS: |
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| 65 | mov dx, si ; DS:DX now points to string |
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| 66 | PRINT_STR_LEN |
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| 67 | ret |
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