| 1 | ; File name : MenuCharOut.asm |
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| 2 | ; Project name : Assembly Library |
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| 3 | ; Created date : 15.7.2010 |
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| 4 | ; Last update : 12.10.2010 |
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| 5 | ; Author : Tomi Tilli |
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| 6 | ; Description : Character out function for printing withing menu window. |
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| 7 | |
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| 8 | ; Section containing code |
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| 9 | SECTION .text |
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| 10 | |
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| 11 | ;-------------------------------------------------------------------- |
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| 12 | ; MenuCharOut_MenuTeletypeOutputWithAutomaticLineChange |
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| 13 | ; MenuCharOut_MenuTeletypeOutput |
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| 14 | ; Parameters: |
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| 15 | ; AL: Character to output |
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| 16 | ; AH: Attribute to output |
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| 17 | ; DS: BDA segment (zero) |
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| 18 | ; ES:DI: Ptr to video memory where to output |
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| 19 | ; [DISPLAY_CONTEXT.wCharOutParam]: |
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| 20 | ; Low byte = First column offset (after CR) |
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| 21 | ; High byte = Last column offset (when using automatic line change) |
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| 22 | ; Returns: |
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| 23 | ; DI: Incremented for next character |
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| 24 | ; Corrupts registers: |
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| 25 | ; AX, DX |
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| 26 | ;-------------------------------------------------------------------- |
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| 27 | ALIGN JUMP_ALIGN |
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| 28 | MenuCharOut_MenuTeletypeOutputWithAutomaticLineChange: |
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| 29 | call CharOutLineSplitter_IsCursorAtTheEndOfTextLine |
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| 30 | jnc SHORT MenuCharOut_MenuTeletypeOutput |
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| 31 | cmp al, ' ' |
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| 32 | jb SHORT ReturnSinceNoNeedToStartLineWithControlCharacter |
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| 33 | call CharOutLineSplitter_MovePartialWordToNewTextLine |
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| 34 | ; Fall to MenuCharOut_MenuTextTeletypeOutputWithAttribute |
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| 35 | |
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| 36 | ALIGN JUMP_ALIGN |
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| 37 | MenuCharOut_MenuTeletypeOutput: |
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| 38 | cmp al, CR |
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| 39 | je SHORT PrintCRandAdjustOffsetForStartOfLine |
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| 40 | jmp DisplayCharOut_TeletypeOutputWithAttribute |
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| 41 | |
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| 42 | |
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| 43 | ;-------------------------------------------------------------------- |
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| 44 | ; MenuCharOut_PrintLFCRandAdjustOffsetForStartOfLine |
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| 45 | ; PrintCRandAdjustOffsetForStartOfLine |
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| 46 | ; Parameters: |
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| 47 | ; DS: BDA segment (zero) |
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| 48 | ; ES:DI: Ptr to cursor location |
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| 49 | ; [DISPLAY_CONTEXT.wCharOutParam]: |
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| 50 | ; Low byte = First column offset (after CR) |
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| 51 | ; High byte = Last column offset (when using automatic line change) |
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| 52 | ; Returns: |
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| 53 | ; ES:DI: Ptr to beginning of new line |
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| 54 | ; Corrupts registers: |
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| 55 | ; AX, DX |
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| 56 | ;-------------------------------------------------------------------- |
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| 57 | ALIGN JUMP_ALIGN |
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| 58 | MenuCharOut_PrintLFCRandAdjustOffsetForStartOfLine: |
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| 59 | mov al, LF |
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| 60 | call DisplayCharOut_BiosTeletypeOutput |
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| 61 | ; Fall to PrintCRandAdjustOffsetForStartOfLine |
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| 62 | |
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| 63 | ALIGN JUMP_ALIGN |
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| 64 | PrintCRandAdjustOffsetForStartOfLine: |
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| 65 | mov al, CR |
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| 66 | call DisplayCharOut_BiosTeletypeOutput |
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| 67 | eMOVZX ax, BYTE [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCharOutParam] |
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| 68 | add di, ax |
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| 69 | ReturnSinceNoNeedToStartLineWithControlCharacter: |
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| 70 | ret |
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