Return to vgaregs.asm CVS log

Up to [WindowsNT SDKs] / ntddk / src / video / displays / vga / i386

Annotation of ntddk/src/video/displays/vga/i386/vgaregs.asm, revision 1.1

1.1     ! root        1: ;---------------------------Module-Header------------------------------;
        !             2: ; Module Name: vgaregs.asm
        !             3: ;
        !             4: ; Copyright (c) 1992 Microsoft Corporation
        !             5: ;-----------------------------------------------------------------------;
        !             6: ;-----------------------------------------------------------------------;
        !             7: ; VOID vInitRegs(void)
        !             8: ;
        !             9: ; Sets the VGA's data control registers to their default states.
        !            10: ;
        !            11: ;-----------------------------------------------------------------------;
        !            12: 
        !            13:         .386
        !            14: 
        !            15: 
        !            16: ifndef  DOS_PLATFORM
        !            17:         .model  small,c
        !            18: else
        !            19: ifdef   STD_CALL
        !            20:         .model  small,c
        !            21: else
        !            22:         .model  small,pascal
        !            23: endif;  STD_CALL
        !            24: endif;  DOS_PLATFORM
        !            25: 
        !            26:         assume cs:FLAT,ds:FLAT,es:FLAT,ss:FLAT
        !            27:         assume fs:nothing,gs:nothing
        !            28: 
        !            29:         .xlist
        !            30:         include stdcall.inc             ;calling convention cmacros
        !            31:         include i386\egavga.inc
        !            32:         include i386\strucs.inc
        !            33:         .list
        !            34: 
        !            35:         .code
        !            36: 
        !            37: cProc vInitRegs
        !            38: 
        !            39: ;       Initialize sequencer to its defaults (all planes enabled, index
        !            40: ;       pointing to Map Mask).
        !            41: 
        !            42:         mov     dx,VGA_BASE + SEQ_ADDR
        !            43:         mov     ax,(MM_ALL shl 8) + SEQ_MAP_MASK
        !            44:         out     dx,ax
        !            45: 
        !            46: ;       Initialize graphics controller to its defaults (set/reset disabled for
        !            47: ;       all planes, no rotation & ALU function == replace, write mode 0 & read
        !            48: ;       mode 0, color compare ignoring all planes (read mode 1 reads always
        !            49: ;       return 0ffh, handy for ANDing), and the bit mask == 0ffh, gating all
        !            50: ;       bytes from the CPU.
        !            51: 
        !            52:         mov     dl,GRAF_ADDR
        !            53:         mov     ax,(0 shl 8) + GRAF_ENAB_SR
        !            54:         out     dx,ax
        !            55: 
        !            56:         mov     ax,(DR_SET shl 8) + GRAF_DATA_ROT
        !            57:         out     dx,ax
        !            58: 
        !            59:         mov     ax,((M_PROC_WRITE or M_DATA_READ) shl 8) + GRAF_MODE
        !            60:         out     dx,ax
        !            61: 
        !            62:         mov     ax,(0 shl 8) + GRAF_CDC
        !            63:         out     dx,ax
        !            64: 
        !            65:         mov     ax,(0FFh shl 8) + GRAF_BIT_MASK
        !            66:         out     dx,ax
        !            67: 
        !            68:         cRet    vInitRegs
        !            69: 
        !            70: 
        !            71: endProc vInitRegs
        !            72: 
        !            73:         end
        !            74: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.