[hbelusca] 65422: [NTVDM] - Rename flags; - Improve VgaUpdateTextCursor a bit (and fix a bug); - Improve a DPRINT and monitor CGA ports (for debugging purposes); - Code styling.
16 Nov
2014
16 Nov
'14
10:19 p.m.
Author: hbelusca
Date: Sun Nov 16 22:19:32 2014
New Revision: 65422
URL: http://svn.reactos.org/svn/reactos?rev=65422&view=rev
Log:
[NTVDM]
- Rename flags;
- Improve VgaUpdateTextCursor a bit (and fix a bug);
- Improve a DPRINT and monitor CGA ports (for debugging purposes);
- Code styling.
Modified:
trunk/reactos/subsystems/ntvdm/hardware/vga.c
trunk/reactos/subsystems/ntvdm/hardware/vga.h
Modified: trunk/reactos/subsystems/ntvdm/hardware/vga.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/hardware/…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/hardware/vga.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/hardware/vga.c [iso-8859-1] Sun Nov 16 22:19:32 2014
@@ -268,19 +268,20 @@
static BYTE VgaAcIndex = VGA_AC_PAL_0_REG;
static BYTE VgaAcRegisters[VGA_AC_MAX_REG];
+static BYTE VgaDacMask = 0xFF;
+
+static BOOLEAN VgaDacReadWrite = FALSE;
+static WORD VgaDacIndex = 0;
+static BYTE VgaDacRegisters[VGA_PALETTE_SIZE];
+
// static VGA_REGISTERS VgaRegisters;
-static BYTE VgaDacMask = 0xFF;
-static WORD VgaDacIndex = 0;
-static BOOLEAN VgaDacReadWrite = FALSE;
-static BYTE VgaDacRegisters[VGA_PALETTE_SIZE];
-
-static BOOLEAN InVerticalRetrace = FALSE;
+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 @@
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 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 @@
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 @@
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 @@
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 @@
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 @@
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 @@
{
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 @@
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 @@
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 @@
}
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 @@
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 @@
/* 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 @@
/* 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 @@
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;
}
Modified: trunk/reactos/subsystems/ntvdm/hardware/vga.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/ntvdm/hardware/…
==============================================================================
--- trunk/reactos/subsystems/ntvdm/hardware/vga.h [iso-8859-1] (original)
+++ trunk/reactos/subsystems/ntvdm/hardware/vga.h [iso-8859-1] Sun Nov 16 22:19:32 2014
@@ -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
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