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[NTVDM]

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- Rename flags;
- Improve VgaUpdateTextCursor a bit (and fix a bug);
- Improve a DPRINT and monitor CGA ports (for debugging purposes);
- Code styling.

svn path=/trunk/; revision=65422
This commit is contained in:
Hermès Bélusca-Maïto 2014-11-16 22:19:32 +00:00
parent 4a12998fb3
commit f4bed99915
2 changed files with 40 additions and 31 deletions
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67
reactos/subsystems/ntvdm/hardware/vga.c
View file

@ -268,19 +268,20 @@ static BOOLEAN VgaAcPalDisable = TRUE;
static BYTE VgaAcIndex = VGA_AC_PAL_0_REG;
static BYTE VgaAcRegisters[VGA_AC_MAX_REG];
// static VGA_REGISTERS VgaRegisters;
static BYTE VgaDacMask = 0xFF;
static BYTE VgaDacMask = 0xFF;
static WORD VgaDacIndex = 0;
static BOOLEAN VgaDacReadWrite = FALSE;
static WORD VgaDacIndex = 0;
static BYTE VgaDacRegisters[VGA_PALETTE_SIZE];
static BOOLEAN InVerticalRetrace = FALSE;
// static VGA_REGISTERS VgaRegisters;
static BOOLEAN InVerticalRetrace = FALSE;
static BOOLEAN InHorizontalRetrace = FALSE;
static BOOLEAN NeedsUpdate = FALSE;
static BOOLEAN ModeChanged = FALSE;
static BOOLEAN CursorMoved = FALSE;
static BOOLEAN CursorChanged = FALSE;
static BOOLEAN PaletteChanged = FALSE;
static
@ -610,13 +611,13 @@ static inline DWORD VgaTranslateReadAddress(DWORD Address)
if (VgaSeqRegisters[VGA_SEQ_MEM_REG] & VGA_SEQ_MEM_C4)
{
/* The lowest two bits are the plane number */
Plane = Offset & 3;
Plane = Offset & 0x03;
Offset >>= 2;
}
else if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
/* The LSB is the plane number */
Plane = Offset & 1;
Plane = Offset & 0x01;
Offset >>= 1;
}
else
@ -656,7 +657,7 @@ static inline DWORD VgaTranslateWriteAddress(DWORD Address)
static inline BYTE VgaTranslateByteForWriting(BYTE Data, BYTE Plane)
{
BYTE WriteMode = VgaGcRegisters[VGA_GC_MODE_REG] & 3;
BYTE WriteMode = VgaGcRegisters[VGA_GC_MODE_REG] & 0x03;
BYTE BitMask = VgaGcRegisters[VGA_GC_BITMASK_REG];
if (WriteMode == 1)
@ -668,7 +669,7 @@ static inline BYTE VgaTranslateByteForWriting(BYTE Data, BYTE Plane)
if (WriteMode != 2)
{
/* Write modes 0 and 3 rotate the data to the right first */
BYTE RotateCount = VgaGcRegisters[VGA_GC_ROTATE_REG] & 7;
BYTE RotateCount = VgaGcRegisters[VGA_GC_ROTATE_REG] & 0x07;
Data = LOBYTE(((DWORD)Data >> RotateCount) | ((DWORD)Data << (8 - RotateCount)));
}
else
@ -693,7 +694,7 @@ static inline BYTE VgaTranslateByteForWriting(BYTE Data, BYTE Plane)
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;
BYTE LogicalOperation = (VgaGcRegisters[VGA_GC_ROTATE_REG] >> 3) & 0x03;
if (LogicalOperation == 1) Data &= VgaLatchRegisters[Plane];
else if (LogicalOperation == 2) Data |= VgaLatchRegisters[Plane];
@ -774,6 +775,7 @@ static VOID VgaWriteCrtc(BYTE Data)
case VGA_CRTC_END_HORZ_DISP_REG:
case VGA_CRTC_VERT_DISP_END_REG:
case VGA_CRTC_OVERFLOW_REG:
case VGA_CRTC_MAX_SCAN_LINE_REG:
{
/* The video mode has changed */
ModeChanged = TRUE;
@ -785,8 +787,8 @@ static VOID VgaWriteCrtc(BYTE Data)
case VGA_CRTC_CURSOR_START_REG:
case VGA_CRTC_CURSOR_END_REG:
{
/* Set the cursor moved flag */
CursorMoved = TRUE;
/* Set the cursor changed flag */
CursorChanged = TRUE;
break;
}
}
@ -1244,8 +1246,8 @@ static VOID VgaUpdateFramebuffer(VOID)
BYTE HighPlaneData = VgaMemory[(BankNumber + 2) * VGA_BANK_SIZE + LOWORD(Offset * AddressSize)];
/* Extract the two bits from each plane */
LowPlaneData = (LowPlaneData >> (6 - ((j % 4) * 2))) & 3;
HighPlaneData = (HighPlaneData >> (6 - ((j % 4) * 2))) & 3;
LowPlaneData = (LowPlaneData >> (6 - ((j % 4) * 2))) & 0x03;
HighPlaneData = (HighPlaneData >> (6 - ((j % 4) * 2))) & 0x03;
/* Combine them into the pixel */
PixelData = LowPlaneData | (HighPlaneData << 2);
@ -1422,8 +1424,11 @@ static VOID VgaUpdateTextCursor(VOID)
{
COORD Position;
CONSOLE_CURSOR_INFO CursorInfo;
BYTE CursorStart = VgaCrtcRegisters[VGA_CRTC_CURSOR_START_REG] & 0x3F;
BYTE CursorEnd = VgaCrtcRegisters[VGA_CRTC_CURSOR_END_REG] & 0x1F;
BOOL CursorVisible = !(VgaCrtcRegisters[VGA_CRTC_CURSOR_START_REG] & 0x20);
BYTE CursorStart = VgaCrtcRegisters[VGA_CRTC_CURSOR_START_REG] & 0x1F;
BYTE CursorEnd = VgaCrtcRegisters[VGA_CRTC_CURSOR_END_REG] & 0x1F;
DWORD ScanlineSize = (DWORD)VgaCrtcRegisters[VGA_CRTC_OFFSET_REG] * 2;
BYTE TextSize = 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
WORD Location = MAKEWORD(VgaCrtcRegisters[VGA_CRTC_CURSOR_LOC_LOW_REG],
@ -1435,18 +1440,18 @@ static VOID VgaUpdateTextCursor(VOID)
if (CursorStart < CursorEnd)
{
/* Visible cursor */
CursorInfo.bVisible = TRUE;
CursorInfo.dwSize = (100 * (CursorEnd - CursorStart)) / TextSize;
CursorInfo.bVisible = CursorVisible;
CursorInfo.dwSize = (100 * (CursorEnd - CursorStart)) / TextSize;
}
else
{
/* No cursor */
/* Hidden cursor */
CursorInfo.bVisible = FALSE;
CursorInfo.dwSize = 0;
CursorInfo.dwSize = 1; // The size needs to be non-null in order SetConsoleCursorInfo to succeed.
}
/* Add the cursor skew to the location */
Location += (VgaCrtcRegisters[VGA_CRTC_CURSOR_END_REG] >> 5) & 3;
Location += (VgaCrtcRegisters[VGA_CRTC_CURSOR_END_REG] >> 5) & 0x03;
/* Find the coordinates of the new position */
Position.X = (SHORT)(Location % ScanlineSize);
@ -1458,8 +1463,8 @@ static VOID VgaUpdateTextCursor(VOID)
SetConsoleCursorInfo(TextConsoleBuffer, &CursorInfo);
SetConsoleCursorPosition(TextConsoleBuffer, Position);
/* Reset the cursor move flag */
CursorMoved = FALSE;
/* Reset the cursor changed flag */
CursorChanged = FALSE;
}
static BYTE WINAPI VgaReadPort(USHORT Port)
@ -1704,7 +1709,7 @@ static VOID WINAPI VgaWritePort(USHORT Port, BYTE Data)
}
default:
DPRINT1("VgaWritePort: Unknown port 0x%X\n", Port);
DPRINT1("VgaWritePort: Unknown port 0x%X, Data 0x%02X\n", Port, Data);
break;
}
}
@ -1778,14 +1783,14 @@ VOID VgaRefreshDisplay(VOID)
InVerticalRetrace = TRUE;
/* If nothing has changed, just return */
// if (!ModeChanged && !CursorMoved && !PaletteChanged && !NeedsUpdate)
// if (!ModeChanged && !CursorChanged && !PaletteChanged && !NeedsUpdate)
// return;
/* Change the display mode */
if (ModeChanged) VgaChangeMode();
/* Change the text cursor location */
if (CursorMoved) VgaUpdateTextCursor();
/* Change the text cursor appearance */
if (CursorChanged) VgaUpdateTextCursor();
/* Retrieve the current resolution */
Resolution = VgaGetDisplayResolution();
@ -1903,7 +1908,7 @@ VOID VgaWriteMemory(DWORD Address, LPBYTE Buffer, DWORD Size)
/* Check if this is chain-4 mode */
if (VgaSeqRegisters[VGA_SEQ_MEM_REG] & VGA_SEQ_MEM_C4)
{
if (((Address + i) & 3) != j)
if (((Address + i) & 0x03) != j)
{
/* This plane will not be accessed */
continue;
@ -1913,7 +1918,7 @@ VOID VgaWriteMemory(DWORD Address, LPBYTE Buffer, DWORD Size)
/* Check if this is odd-even mode */
if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
if (((Address + i) & 1) != (j & 1))
if (((Address + i) & 0x01) != (j & 1))
{
/* This plane will not be accessed */
continue;
@ -2070,6 +2075,10 @@ BOOLEAN VgaInitialize(HANDLE TextHandle)
RegisterIoPort(0x3CE, VgaReadPort, VgaWritePort); // VGA_GC_INDEX
RegisterIoPort(0x3CF, VgaReadPort, VgaWritePort); // VGA_GC_DATA
/* CGA ports for compatibility, unimplemented */
RegisterIoPort(0x3D8, VgaReadPort, VgaWritePort); // CGA_MODE_CTRL_REG
RegisterIoPort(0x3D9, VgaReadPort, VgaWritePort); // CGA_PAL_CTRL_REG
/* Return success */
return TRUE;
}

4
reactos/subsystems/ntvdm/hardware/vga.h
View file

@ -76,7 +76,7 @@
#define VGA_MISC_RAM_ENABLED (1 << 1)
// #define VGA_MISC_CSEL1 (1 << 2)
// #define VGA_MISC_CSEL2 (1 << 3)
#define VGA_MISC_OE_INVERT (1 << 5)
#define VGA_MISC_OE_PAGESEL (1 << 5)
#define VGA_MISC_HSYNCP (1 << 6)
#define VGA_MISC_VSYNCP (1 << 7)
@ -102,7 +102,7 @@
/* Sequencer memory register bits */
#define VGA_SEQ_MEM_EXT (1 << 1)
#define VGA_SEQ_MEM_OE (1 << 2)
#define VGA_SEQ_MEM_OE_DIS (1 << 2)
#define VGA_SEQ_MEM_C4 (1 << 3)
enum