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Annotation of ntddk/src/video/displays/xga/hardware.c, revision 1.1.1.1

1.1       root        1: /******************************Module*Header*******************************\
                      2: * Module Name: hardware.c
                      3: *
                      4: * Hardware dependent initialization
                      5: *
                      6: * Copyright (c) 1992 Microsoft Corporation
                      7: *
                      8: \**************************************************************************/
                      9: 
                     10: 
                     11: #include "driver.h"
                     12: 
                     13: 
                     14: /****************************************************************************
                     15:  *
                     16:  ***************************************************************************/
                     17: BOOL DevSetPalette(HANDLE hDriver, PPALETTEENTRY lpPalette,
                     18:         DWORD iIndex, DWORD iCount)
                     19: {
                     20: 
                     21:     ULONG ReturnedDataLength;
                     22:     PVIDEO_CLUT pClut;
                     23:     ULONG iSize;
                     24:     ULONG iSizeClut;
                     25: 
                     26:     iSizeClut = (iCount + 2) * sizeof(ULONG);
                     27:     pClut = (PVIDEO_CLUT) LocalAlloc(LPTR, iSizeClut);
                     28: 
                     29:     pClut->NumEntries = (USHORT) iCount;
                     30:     pClut->FirstEntry = (USHORT) iIndex;
                     31: 
                     32:     iSize = iCount * sizeof(ULONG);
                     33:     memcpy(pClut->LookupTable, lpPalette, iSize);
                     34: 
                     35:     if (!DeviceIoControl(hDriver,
                     36:                          IOCTL_VIDEO_SET_COLOR_REGISTERS,
                     37:                          (PVOID) pClut, // input buffer
                     38:                          iSizeClut,
                     39:                          NULL,    // output buffer
                     40:                          0,
                     41:                          &ReturnedDataLength,
                     42:                          NULL)) {
                     43: 
                     44:         RIP("XGA.DLL: Initialization error-Set color registers");
                     45: 
                     46:     }
                     47: 
                     48:     LocalFree(pClut);
                     49: 
                     50:     return(TRUE);
                     51: 
                     52: }
                     53: 
                     54: 
                     55: /****************************************************************************
                     56:  * vWaitForCoProcessor
                     57:  ***************************************************************************/
                     58: VOID vWaitForCoProcessor(PPDEV ppdev, ULONG ulDelay)
                     59: {
                     60: 
                     61:     ULONG i;
                     62:     ULONG j;
                     63:     volatile ULONG iWait = 0x5555;
                     64: 
                     65:     DISPDBG((3, "XGA.DLL!vWaitForCoProcessor - Entry\n"));
                     66: 
                     67:     while (ppdev->pXgaCpRegs->XGACoprocCntl & 0x80)
                     68:     {
                     69:         for (i = 0; i < ulDelay; i++)
                     70:         {
                     71:             if (iWait & 0x80)
                     72:                 j++;
                     73:         }
                     74:     }
                     75: }
                     76: 

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