static CONST DWORD MemoryBase[] = { 0xA0000, 0xA0000, 0xB0000, 0xB8000 };
static CONST DWORD MemoryLimit[] = { 0xAFFFF, 0xAFFFF, 0xB7FFF, 0xBFFFF };
+
+/*static*/ CONST COLORREF EgaPalette[VGA_MAX_COLORS / 4] =
+{
+ RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0xAA), RGB(0x00, 0xAA, 0x00), RGB(0x00, 0xAA, 0xAA),
+ RGB(0xAA, 0x00, 0x00), RGB(0xAA, 0x00, 0xAA), RGB(0xAA, 0xAA, 0x00), RGB(0xAA, 0xAA, 0xAA),
+ RGB(0x00, 0x00, 0x55), RGB(0x00, 0x00, 0xFF), RGB(0x00, 0xAA, 0x55), RGB(0x00, 0xAA, 0xFF),
+ RGB(0xAA, 0x00, 0x55), RGB(0xAA, 0x00, 0xFF), RGB(0xAA, 0xAA, 0x55), RGB(0xAA, 0xAA, 0xFF),
+ RGB(0x00, 0x55, 0x00), RGB(0x00, 0x55, 0xAA), RGB(0x00, 0xFF, 0x00), RGB(0x00, 0xFF, 0xAA),
+ RGB(0xAA, 0x55, 0x00), RGB(0xAA, 0x55, 0xAA), RGB(0xAA, 0xFF, 0x00), RGB(0xAA, 0xFF, 0xAA),
+ RGB(0x00, 0x55, 0x55), RGB(0x00, 0x55, 0xFF), RGB(0x00, 0xFF, 0x55), RGB(0x00, 0xFF, 0xFF),
+ RGB(0xAA, 0x55, 0x55), RGB(0xAA, 0x55, 0xFF), RGB(0xAA, 0xFF, 0x55), RGB(0xAA, 0xFF, 0xFF),
+ RGB(0x55, 0x00, 0x00), RGB(0x55, 0x00, 0xAA), RGB(0x55, 0xAA, 0x00), RGB(0x55, 0xAA, 0xAA),
+ RGB(0xFF, 0x00, 0x00), RGB(0xFF, 0x00, 0xAA), RGB(0xFF, 0xAA, 0x00), RGB(0xFF, 0xAA, 0xAA),
+ RGB(0x55, 0x00, 0x55), RGB(0x55, 0x00, 0xFF), RGB(0x55, 0xAA, 0x55), RGB(0x55, 0xAA, 0xFF),
+ RGB(0xFF, 0x00, 0x55), RGB(0xFF, 0x00, 0xFF), RGB(0xFF, 0xAA, 0x55), RGB(0xFF, 0xAA, 0xFF),
+ RGB(0x55, 0x55, 0x00), RGB(0x55, 0x55, 0xAA), RGB(0x55, 0xFF, 0x00), RGB(0x55, 0xFF, 0xAA),
+ RGB(0xFF, 0x55, 0x00), RGB(0xFF, 0x55, 0xAA), RGB(0xFF, 0xFF, 0x00), RGB(0xFF, 0xFF, 0xAA),
+ RGB(0x55, 0x55, 0x55), RGB(0x55, 0x55, 0xFF), RGB(0x55, 0xFF, 0x55), RGB(0x55, 0xFF, 0xFF),
+ RGB(0xFF, 0x55, 0x55), RGB(0xFF, 0x55, 0xFF), RGB(0xFF, 0xFF, 0x55), RGB(0xFF, 0xFF, 0xFF)
+};
+
static CONST COLORREF VgaDefaultPalette[VGA_MAX_COLORS] =
{
RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0xAA), RGB(0x00, 0xAA, 0x00), RGB(0x00, 0xAA, 0xAA),
static BOOLEAN DoubleVision = FALSE;
static BYTE VgaLatchRegisters[VGA_NUM_BANKS] = {0, 0, 0, 0};
+
static BYTE VgaMiscRegister;
+static BYTE VgaFeatureRegister;
static BYTE VgaSeqIndex = VGA_SEQ_RESET_REG;
static BYTE VgaSeqRegisters[VGA_SEQ_MAX_REG];
-static BYTE VgaGcIndex = VGA_GC_RESET_REG;
-static BYTE VgaGcRegisters[VGA_GC_MAX_REG];
-
static BYTE VgaCrtcIndex = VGA_CRTC_HORZ_TOTAL_REG;
static BYTE VgaCrtcRegisters[VGA_CRTC_MAX_REG];
-static BYTE VgaAcIndex = VGA_AC_PAL_0_REG;
+static BYTE VgaGcIndex = VGA_GC_RESET_REG;
+static BYTE VgaGcRegisters[VGA_GC_MAX_REG];
+
static BOOLEAN VgaAcLatch = FALSE;
+static BYTE VgaAcIndex = VGA_AC_PAL_0_REG;
static BYTE VgaAcRegisters[VGA_AC_MAX_REG];
+// static VGA_REGISTERS VgaRegisters;
+
+static BYTE VgaDacMask = 0xFF;
static WORD VgaDacIndex = 0;
static BOOLEAN VgaDacReadWrite = FALSE;
static BYTE VgaDacRegisters[VGA_PALETTE_SIZE];
static inline BYTE VgaTranslateByteForWriting(BYTE Data, BYTE Plane)
{
BYTE WriteMode = VgaGcRegisters[VGA_GC_MODE_REG] & 3;
- BYTE LogicalOperation = (VgaGcRegisters[VGA_GC_ROTATE_REG] >> 3) & 3;
- BYTE RotateCount = VgaGcRegisters[VGA_GC_ROTATE_REG] & 7;
BYTE BitMask = VgaGcRegisters[VGA_GC_BITMASK_REG];
if (WriteMode == 1)
if (WriteMode != 2)
{
/* Write modes 0 and 3 rotate the data to the right first */
+ BYTE RotateCount = VgaGcRegisters[VGA_GC_ROTATE_REG] & 7;
Data = LOBYTE(((DWORD)Data >> RotateCount) | ((DWORD)Data << (8 - RotateCount)));
}
else
if (WriteMode != 3)
{
/* Write modes 0 and 2 then perform a logical operation on the data and latch */
+ BYTE LogicalOperation = (VgaGcRegisters[VGA_GC_ROTATE_REG] >> 3) & 3;
+
if (LogicalOperation == 1) Data &= VgaLatchRegisters[Plane];
else if (LogicalOperation == 2) Data |= VgaLatchRegisters[Plane];
else if (LogicalOperation == 3) Data ^= VgaLatchRegisters[Plane];
DPRINT("VgaReadMemory: Address 0x%08X, Size %lu\n", Address, Size);
/* Ignore if video RAM access is disabled */
- if (!(VgaMiscRegister & VGA_MISC_RAM_ENABLED)) return;
+ if ((VgaMiscRegister & VGA_MISC_RAM_ENABLED) == 0) return;
/* Loop through each byte */
for (i = 0; i < Size; i++)
DPRINT("VgaWriteMemory: Address 0x%08X, Size %lu\n", Address, Size);
/* Ignore if video RAM access is disabled */
- if (!(VgaMiscRegister & VGA_MISC_RAM_ENABLED)) return;
+ if ((VgaMiscRegister & VGA_MISC_RAM_ENABLED) == 0) return;
/* Also ignore if write access to all planes is disabled */
if ((VgaSeqRegisters[VGA_SEQ_MASK_REG] & 0x0F) == 0x00) return;
BYTE WINAPI VgaReadPort(ULONG Port)
{
- DPRINT("VgaReadPort: Port 0x%08X\n", Port);
+ DPRINT("VgaReadPort: Port 0x%X\n", Port);
switch (Port)
{
- case VGA_AC_INDEX:
+ case VGA_MISC_READ:
+ return VgaMiscRegister;
+
+ case VGA_INSTAT0_READ:
+ return 0; // Not implemented
+
+ case VGA_INSTAT1_READ_MONO:
+ case VGA_INSTAT1_READ_COLOR:
{
- return VgaAcIndex;
+ BYTE Result = 0;
+
+ /* Reset the AC latch */
+ VgaAcLatch = FALSE;
+
+ /* Set a flag if there is a vertical or horizontal retrace */
+ if (InVerticalRetrace || InHorizontalRetrace) Result |= VGA_STAT_DD;
+
+ /* Set an additional flag if there was a vertical retrace */
+ if (InVerticalRetrace) Result |= VGA_STAT_VRETRACE;
+
+ /* Clear the flags */
+ InHorizontalRetrace = InVerticalRetrace = FALSE;
+
+ return Result;
}
+ case VGA_FEATURE_READ:
+ return VgaFeatureRegister;
+
+ case VGA_AC_INDEX:
+ return VgaAcIndex;
+
case VGA_AC_READ:
- {
return VgaAcRegisters[VgaAcIndex];
- }
case VGA_SEQ_INDEX:
- {
return VgaSeqIndex;
- }
case VGA_SEQ_DATA:
- {
return VgaSeqRegisters[VgaSeqIndex];
- }
+
+ case VGA_DAC_MASK:
+ return VgaDacMask;
case VGA_DAC_READ_INDEX:
- {
/* This returns the read/write state */
- return VgaDacReadWrite ? 0 : 3;
- }
+ return (VgaDacReadWrite ? 0 : 3);
case VGA_DAC_WRITE_INDEX:
- {
- return VgaDacIndex / 3;
- }
+ return (VgaDacIndex / 3);
case VGA_DAC_DATA:
{
break;
}
- case VGA_MISC_READ:
- {
- return VgaMiscRegister;
- }
-
- case VGA_CRTC_INDEX:
- {
+ case VGA_CRTC_INDEX_MONO:
+ case VGA_CRTC_INDEX_COLOR:
return VgaCrtcIndex;
- }
- case VGA_CRTC_DATA:
- {
+ case VGA_CRTC_DATA_MONO:
+ case VGA_CRTC_DATA_COLOR:
return VgaCrtcRegisters[VgaCrtcIndex];
- }
case VGA_GC_INDEX:
- {
return VgaGcIndex;
- }
case VGA_GC_DATA:
- {
return VgaGcRegisters[VgaGcIndex];
- }
-
- case VGA_STAT_MONO:
- case VGA_STAT_COLOR:
- {
- BYTE Result = 0;
-
- /* Reset the AC latch */
- VgaAcLatch = FALSE;
-
- /* Set a flag if there is a vertical or horizontal retrace */
- if (InVerticalRetrace || InHorizontalRetrace) Result |= VGA_STAT_DD;
- /* Set an additional flag if there was a vertical retrace */
- if (InVerticalRetrace) Result |= VGA_STAT_VRETRACE;
-
- /* Clear the flags */
- InHorizontalRetrace = InVerticalRetrace = FALSE;
-
- return Result;
- }
+ default:
+ DPRINT1("VgaReadPort: Unknown port 0x%X\n", Port);
+ break;
}
-
+
return 0;
}
VOID WINAPI VgaWritePort(ULONG Port, BYTE Data)
{
- DPRINT("VgaWritePort: Port 0x%08X, Data 0x%02X\n", Port, Data);
+ DPRINT("VgaWritePort: Port 0x%X, Data 0x%02X\n", Port, Data);
switch (Port)
{
+ case VGA_MISC_WRITE:
+ {
+ VgaMiscRegister = Data;
+
+ if (VgaMiscRegister & 0x01)
+ {
+ /* Color emulation */
+ DPRINT1("Color emulation\n");
+
+ /* Register the new I/O Ports */
+ RegisterIoPort(0x3D4, VgaReadPort, VgaWritePort); // VGA_CRTC_INDEX_COLOR
+ RegisterIoPort(0x3D5, VgaReadPort, VgaWritePort); // VGA_CRTC_DATA_COLOR
+ RegisterIoPort(0x3DA, VgaReadPort, VgaWritePort); // VGA_INSTAT1_READ_COLOR, VGA_FEATURE_WRITE_COLOR
+
+ /* Unregister the old ones */
+ UnregisterIoPort(0x3B4); // VGA_CRTC_INDEX_MONO
+ UnregisterIoPort(0x3B5); // VGA_CRTC_DATA_MONO
+ UnregisterIoPort(0x3BA); // VGA_INSTAT1_READ_MONO, VGA_FEATURE_WRITE_MONO
+ }
+ else
+ {
+ /* Monochrome emulation */
+ DPRINT1("Monochrome emulation\n");
+
+ /* Register the new I/O Ports */
+ RegisterIoPort(0x3B4, VgaReadPort, VgaWritePort); // VGA_CRTC_INDEX_MONO
+ RegisterIoPort(0x3B5, VgaReadPort, VgaWritePort); // VGA_CRTC_DATA_MONO
+ RegisterIoPort(0x3BA, VgaReadPort, VgaWritePort); // VGA_INSTAT1_READ_MONO, VGA_FEATURE_WRITE_MONO
+
+ /* Unregister the old ones */
+ UnregisterIoPort(0x3D4); // VGA_CRTC_INDEX_COLOR
+ UnregisterIoPort(0x3D5); // VGA_CRTC_DATA_COLOR
+ UnregisterIoPort(0x3DA); // VGA_INSTAT1_READ_COLOR, VGA_FEATURE_WRITE_COLOR
+ }
+
+ // if (VgaMiscRegister & 0x02) { /* Enable RAM access */ } else { /* Disable RAM access */ }
+ break;
+ }
+
+ case VGA_FEATURE_WRITE_MONO:
+ case VGA_FEATURE_WRITE_COLOR:
+ {
+ VgaFeatureRegister = Data;
+ break;
+ }
+
case VGA_AC_INDEX:
+ // case VGA_AC_WRITE:
{
if (!VgaAcLatch)
{
/* Toggle the latch */
VgaAcLatch = !VgaAcLatch;
-
break;
}
break;
}
+ case VGA_DAC_MASK:
+ {
+ VgaDacMask = Data;
+ break;
+ }
+
case VGA_DAC_READ_INDEX:
{
VgaDacReadWrite = FALSE;
break;
}
- case VGA_MISC_WRITE:
- {
- VgaMiscRegister = Data;
- break;
- }
-
- case VGA_CRTC_INDEX:
+ case VGA_CRTC_INDEX_MONO:
+ case VGA_CRTC_INDEX_COLOR:
{
/* Set the CRTC index register */
if (Data < VGA_CRTC_MAX_REG) VgaCrtcIndex = Data;
break;
}
- case VGA_CRTC_DATA:
+ case VGA_CRTC_DATA_MONO:
+ case VGA_CRTC_DATA_COLOR:
{
/* Call the CRTC function */
VgaWriteCrtc(Data);
VgaWriteGc(Data);
break;
}
+
+ default:
+ DPRINT1("VgaWritePort: Unknown port 0x%X\n", Port);
+ break;
}
}
/* Set the global handle */
TextConsoleBuffer = TextHandle;
+ /* Register the I/O Ports */
+ RegisterIoPort(0x3CC, VgaReadPort, NULL); // VGA_MISC_READ
+ RegisterIoPort(0x3C2, VgaReadPort, VgaWritePort); // VGA_MISC_WRITE, VGA_INSTAT0_READ
+ RegisterIoPort(0x3CA, VgaReadPort, NULL); // VGA_FEATURE_READ
+ RegisterIoPort(0x3C0, VgaReadPort, VgaWritePort); // VGA_AC_INDEX, VGA_AC_WRITE
+ RegisterIoPort(0x3C1, VgaReadPort, NULL); // VGA_AC_READ
+ RegisterIoPort(0x3C4, VgaReadPort, VgaWritePort); // VGA_SEQ_INDEX
+ RegisterIoPort(0x3C5, VgaReadPort, VgaWritePort); // VGA_SEQ_DATA
+ RegisterIoPort(0x3C6, VgaReadPort, VgaWritePort); // VGA_DAC_MASK
+ RegisterIoPort(0x3C7, VgaReadPort, VgaWritePort); // VGA_DAC_READ_INDEX
+ RegisterIoPort(0x3C8, VgaReadPort, VgaWritePort); // VGA_DAC_WRITE_INDEX
+ RegisterIoPort(0x3C9, VgaReadPort, VgaWritePort); // VGA_DAC_DATA
+ RegisterIoPort(0x3CE, VgaReadPort, VgaWritePort); // VGA_GC_INDEX
+ RegisterIoPort(0x3CF, VgaReadPort, VgaWritePort); // VGA_GC_DATA
+
/* Clear the VGA memory */
VgaClearMemory();
Address += ScanlineSize;
}
- /* Register the I/O Ports */
- RegisterIoPort(VGA_AC_WRITE , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_AC_READ , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_SEQ_INDEX, VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_SEQ_DATA , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_DAC_READ_INDEX , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_DAC_WRITE_INDEX, VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_DAC_DATA , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_MISC_READ , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_MISC_WRITE, VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_CRTC_INDEX, VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_CRTC_DATA , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_GC_INDEX, VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_GC_DATA , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_STAT_MONO , VgaReadPort, VgaWritePort);
- RegisterIoPort(VGA_STAT_COLOR, VgaReadPort, VgaWritePort);
-
/* Return success */
return TRUE;
}
projects / reactos.git / blobdiff