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port.c File Reference

#include "stdarg.h"
#include "stdio.h"
#include "ntddk.h"
#include "fsvga.h"
#include "fsvgalog.h"

Go to the source code of this file.

Functions

VOID GetHardwareScrollReg (PDEVICE_EXTENSION deviceExtension)
VOID SetGRAMWriteMode (PDEVICE_EXTENSION deviceExtension)
VOID SetGRAMCopyMode (PDEVICE_EXTENSION deviceExtension)
VOID SetGRAMInvertMode (PDEVICE_EXTENSION deviceExtension)
VOID set_opaque_bkgnd_proc (PDEVICE_EXTENSION deviceExtension, PUCHAR FrameBuffer, WORD Attributes)
VOID ColorSetGridMask (PDEVICE_EXTENSION deviceExtension, BYTE BitMask)
VOID ColorSetDirect (PDEVICE_EXTENSION deviceExtension, PUCHAR FrameBuffer, BYTE ColorFg, BYTE ColorBg)

Function Documentation

VOID ColorSetDirect (  PDEVICE_EXTENSION  deviceExtension,
PUCHAR  FrameBuffer,
BYTE  ColorFg,
BYTE  ColorBg
) 
 

Definition at line 257 of file port.c.

References AccessGRAM_WR(), _DEVICE_EXTENSION::DeviceRegisters, DR_SET, DR_XOR, GRAPH_ADDR_MASK, GRAPHAddressPort, IND_DATA_ROTATE, IND_SET_RESET, and IND_SET_RESET_ENABLE.

Referenced by FsgWriteToScreenCommonLVB(), and set_opaque_bkgnd_proc(). 

00275 {
00276     //
00277     // Set up to write data without interacting with the latches.
00278     //
00279     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00280                       MAKEWORD(IND_DATA_ROTATE, DR_SET));
00281 
00282     //
00283     // Put the background color in the Set/Reset register.
00284     //
00285     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00286                       MAKEWORD(IND_SET_RESET, ColorBg));
00287 
00288     //
00289     // That color is used for all planes.
00290     //
00291     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00292                       MAKEWORD(IND_SET_RESET_ENABLE, GRAPH_ADDR_MASK));
00293 
00294     //
00295     // This gets our background color into the latches.
00296     //
00297     AccessGRAM_WR(FrameBuffer, GRAPH_ADDR_MASK);
00298 
00299     //
00300     // Change the Set/Reset register to be all zeroes.
00301     //
00302     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00303                       MAKEWORD(IND_SET_RESET, 0));
00304 
00305     //
00306     // The Set/Reset enable register now flags where the foreground/background colors are the same.
00307     //
00308     ColorFg = ~(ColorFg ^ ColorBg);
00309     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00310                       MAKEWORD(IND_SET_RESET_ENABLE, ColorFg));
00311 
00312     //
00313     // Color differences will be xor'd with the latches.
00314     //
00315     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00316                       MAKEWORD(IND_DATA_ROTATE, DR_XOR));
00317 
00318 
00319 }

VOID ColorSetGridMask (  PDEVICE_EXTENSION  deviceExtension,
BYTE  BitMask
) 
 

Definition at line 225 of file port.c.

References _DEVICE_EXTENSION::DeviceRegisters, DR_SET, GRAPH_ADDR_MASK, GRAPHAddressPort, IND_BIT_MASK, IND_DATA_ROTATE, IND_SET_RESET, and IND_SET_RESET_ENABLE.

Referenced by FsgWriteToScreenCommonLVB(). 

00229 {
00230 
00231     //
00232     // That color is used for all planes.
00233     //
00234     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00235                       MAKEWORD(IND_SET_RESET_ENABLE, GRAPH_ADDR_MASK));
00236 
00237     //
00238     // Change the Set/Reset register to be all set.
00239     //
00240     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00241                       MAKEWORD(IND_SET_RESET, 0x07));
00242 
00243     //
00244     // Use specified pixel positions.
00245     //
00246     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00247                       MAKEWORD(IND_BIT_MASK, BitMask));
00248 
00249     //
00250     // Set up to write data without interacting with the latches.
00251     //
00252     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00253                       MAKEWORD(IND_DATA_ROTATE, DR_SET));
00254 }

VOID GetHardwareScrollReg (  PDEVICE_EXTENSION  deviceExtension  ) 
 

Definition at line 31 of file port.c.

References CRTCAddressPortColor, CRTCDataPortColor, _DEVICE_EXTENSION::DeviceRegisters, _DEVICE_EXTENSION::EmulateInfo, high, IND_LINE_COMPARE, IND_LINE_COMPARE8, IND_LINE_COMPARE9, IND_START_ADRS_H, IND_START_ADRS_L, _EMULATE_BUFFER_INFORMATION::LineCompare, low, and _EMULATE_BUFFER_INFORMATION::StartAddress.

Referenced by FsgVgaInitializeHWFlags(). 

00037                    :
00038 
00039     This routine gets the hardware scrolls register value.
00040 
00041 Arguments:
00042 
00043 Return Value:
00044 
00045 --*/
00046 
00047 {
00048     UCHAR low;
00049     UCHAR high;
00050     UCHAR mid;
00051 
00052     WRITE_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCAddressPortColor],
00053                       IND_START_ADRS_L);
00054     low = READ_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCDataPortColor]);
00055 
00056     WRITE_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCAddressPortColor],
00057                       IND_START_ADRS_H);
00058     high = READ_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCDataPortColor]);
00059 
00060     deviceExtension->EmulateInfo.StartAddress = MAKEWORD(low, high);
00061 
00062     WRITE_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCAddressPortColor],
00063                       IND_LINE_COMPARE);
00064     low = READ_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCDataPortColor]);
00065 
00066     WRITE_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCAddressPortColor],
00067                       IND_LINE_COMPARE8);
00068     mid = READ_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCDataPortColor]);
00069     mid = (mid >> 4) & 1;
00070 
00071     WRITE_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCAddressPortColor],
00072                       IND_LINE_COMPARE9);
00073     high = READ_PORT_UCHAR(deviceExtension->DeviceRegisters[CRTCDataPortColor]);
00074     high = (high >> 5) & 2;
00075 
00076     high |= mid;
00077     deviceExtension->EmulateInfo.LineCompare = MAKEWORD(low, high);
00078 }

VOID set_opaque_bkgnd_proc (  PDEVICE_EXTENSION  deviceExtension,
PUCHAR  FrameBuffer,
WORD  Attributes
) 
 

Definition at line 186 of file port.c.

References BYTE, _EMULATE_BUFFER_INFORMATION::ColorBg, _EMULATE_BUFFER_INFORMATION::ColorFg, ColorSetDirect(), _DEVICE_EXTENSION::EmulateInfo, and LOBYTE.

Referenced by FsgWriteToScreen(), and FsgWriteToScreenCommonLVB(). 

00203 {
00204     BYTE ColorFg = LOBYTE(Attributes) & 0x0f;
00205     BYTE ColorBg = (LOBYTE(Attributes) & 0xf0) >> 4;
00206 
00207     if (Attributes & COMMON_LVB_REVERSE_VIDEO)
00208     {
00209         Attributes = ColorBg;
00210         ColorBg = ColorFg;
00211         ColorFg = (BYTE)Attributes;
00212     }
00213 
00214     if (deviceExtension->EmulateInfo.ColorFg == ColorFg &&
00215         deviceExtension->EmulateInfo.ColorBg == ColorBg)
00216         return;
00217 
00218     deviceExtension->EmulateInfo.ColorFg = ColorFg;
00219     deviceExtension->EmulateInfo.ColorBg = ColorBg;
00220 
00221     ColorSetDirect(deviceExtension, FrameBuffer, ColorFg, ColorBg);
00222 }

VOID SetGRAMCopyMode (  PDEVICE_EXTENSION  deviceExtension  ) 
 

Definition at line 121 of file port.c.

References _DEVICE_EXTENSION::DeviceRegisters, DR_SET, GRAPHAddressPort, IND_COLOR_DONT_CARE, IND_DATA_ROTATE, IND_GRAPH_MODE, M_COLOR_READ, and M_LATCH_WRITE.

Referenced by MoveGRAM(). 

00127                    :
00128 
00129     This routine sets the copy mode of graphics register.
00130 
00131 Arguments:
00132 
00133 Return Value:
00134 
00135 --*/
00136 
00137 {
00138     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00139                       MAKEWORD(IND_GRAPH_MODE, M_LATCH_WRITE+M_COLOR_READ));
00140 
00141     //
00142     // Set up to write data without interacting with the latches.
00143     //
00144     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00145                       MAKEWORD(IND_DATA_ROTATE, DR_SET));
00146 
00147     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00148                       MAKEWORD(IND_COLOR_DONT_CARE, 0));
00149 }

VOID SetGRAMInvertMode (  PDEVICE_EXTENSION  deviceExtension  ) 
 

Definition at line 152 of file port.c.

References BIT_MASK_DEFAULT, _DEVICE_EXTENSION::DeviceRegisters, DR_XOR, GRAPHAddressPort, IND_BIT_MASK, IND_COLOR_DONT_CARE, IND_DATA_ROTATE, IND_GRAPH_MODE, IND_SET_RESET, M_AND_WRITE, and M_COLOR_READ.

Referenced by FsgInvertCursor(), and FsgReverseMousePointer(). 

00158                    :
00159 
00160     This routine sets the invert mode of graphics register.
00161 
00162 Arguments:
00163 
00164 Return Value:
00165 
00166 --*/
00167 
00168 {
00169     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00170                       MAKEWORD(IND_GRAPH_MODE, M_AND_WRITE+M_COLOR_READ));
00171 
00172     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00173                       MAKEWORD(IND_DATA_ROTATE, DR_XOR));
00174 
00175     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00176                       MAKEWORD(IND_BIT_MASK, BIT_MASK_DEFAULT));
00177 
00178     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00179                       MAKEWORD(IND_COLOR_DONT_CARE, 0));
00180 
00181     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00182                       MAKEWORD(IND_SET_RESET, 0xff));
00183 }

VOID SetGRAMWriteMode (  PDEVICE_EXTENSION  deviceExtension  ) 
 

Definition at line 81 of file port.c.

References BIT_MASK_DEFAULT, _DEVICE_EXTENSION::DeviceRegisters, DR_SET, GRAPH_ADDR_MASK, GRAPHAddressPort, IND_BIT_MASK, IND_DATA_ROTATE, IND_GRAPH_MODE, IND_MAP_MASK, M_DATA_READ, M_PROC_WRITE, and SEQUAddressPort.

Referenced by FsgInvertCursor(), FsgReverseMousePointer(), FsgVgaInitializeHWFlags(), FsgWriteToScreenCommonLVB(), and MoveGRAM(). 

00087                    :
00088 
00089     This routine sets the write mode of graphics register.
00090 
00091 Arguments:
00092 
00093 Return Value:
00094 
00095 --*/
00096 
00097 {
00098     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00099                       MAKEWORD(IND_GRAPH_MODE, M_PROC_WRITE+M_DATA_READ));
00100 
00101     //
00102     // Set up to write data without interacting with the latches.
00103     //
00104     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00105                       MAKEWORD(IND_DATA_ROTATE, DR_SET));
00106 
00107     //
00108     // Enable all the available EGA planes.
00109     //
00110     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[SEQUAddressPort],
00111                       MAKEWORD(IND_MAP_MASK, GRAPH_ADDR_MASK));
00112     //
00113     // Use all pixel positions.
00114     //
00115     WRITE_PORT_USHORT(deviceExtension->DeviceRegisters[GRAPHAddressPort],
00116                       MAKEWORD(IND_BIT_MASK, BIT_MASK_DEFAULT));
00117 
00118 }

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