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https://github.com/reactos/reactos.git
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[NTVDM]
Implement an 800x600 256-color mode for testing purposes. Its register values and mode information should be correct already. Properly reset the VCLKs and the MCLK. Clear the screen after switching to an extended video mode. Fix the screen size computation in "High Resolution" modes. svn path=/trunk/; revision=71830
This commit is contained in:
Aleksandar Andrejevic
parent
103794988b
commit
cb085e5f4a
3 changed files with 173 additions and 36 deletions
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@ -24,32 +24,114 @@
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/* PRIVATE VARIABLES **********************************************************/
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static const VBE_MODE Modes[VBE_MODE_COUNT] = {
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{ 0x14, 0xFFFF, NULL /* TODO */, NULL },
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{ 0x54, 0x10A, NULL /* TODO */, NULL /* TODO */ },
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{ 0x55, 0x109, NULL /* TODO */, NULL /* TODO */ },
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{ 0x58, 0x102, NULL /* TODO */, NULL /* TODO */ },
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{ 0x5C, 0x103, NULL /* TODO */, NULL /* TODO */ },
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{ 0x5D, 0x104, NULL /* TODO */, NULL /* TODO */ },
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{ 0x5E, 0x100, NULL /* TODO */, NULL /* TODO */ },
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{ 0x5F, 0x101, NULL /* TODO */, NULL /* TODO */ },
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{ 0x60, 0x105, NULL /* TODO */, NULL /* TODO */ },
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{ 0x64, 0x111, NULL /* TODO */, NULL /* TODO */ },
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{ 0x65, 0x114, NULL /* TODO */, NULL /* TODO */ },
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{ 0x66, 0x110, NULL /* TODO */, NULL /* TODO */ },
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{ 0x67, 0x113, NULL /* TODO */, NULL /* TODO */ },
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{ 0x68, 0x116, NULL /* TODO */, NULL /* TODO */ },
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{ 0x69, 0x119, NULL /* TODO */, NULL /* TODO */ },
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{ 0x6C, 0x106, NULL /* TODO */, NULL /* TODO */ },
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{ 0x6D, 0x107, NULL /* TODO */, NULL /* TODO */ },
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{ 0x71, 0x112, NULL /* TODO */, NULL /* TODO */ },
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{ 0x72, 0xFFFF, NULL /* TODO */, NULL },
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{ 0x73, 0xFFFF, NULL /* TODO */, NULL },
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{ 0x74, 0x117, NULL /* TODO */, NULL /* TODO */ },
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{ 0x75, 0x11A, NULL /* TODO */, NULL /* TODO */ },
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{ 0x76, 0xFFFF, NULL /* TODO */, NULL },
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{ 0x78, 0x115, NULL /* TODO */, NULL /* TODO */ },
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{ 0x79, 0x118, NULL /* TODO */, NULL /* TODO */ },
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static const VBE_MODE_INFO VbeMode_800x600x256_Info =
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{
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/* Attributes */
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VBE_MODE_SUPPORTED
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| VBE_MODE_OPTIONAL_INFO
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// | VBE_MODE_BIOS_SUPPORT
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| VBE_MODE_COLOR
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| VBE_MODE_GRAPHICS,
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/* Window A attributes */
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VBE_WINDOW_EXISTS | VBE_WINDOW_READABLE | VBE_WINDOW_WRITABLE,
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/* Window B attributes */
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0,
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16, /* Window granularity, in KB */
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64, /* Window size, in KB */
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0xA000, /* Window A segment, or zero if not supported */
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0x0000, /* Window B segment, or zero if not supported */
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0x00000000, /* Window position function pointer */
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800, /* Bytes per scanline */
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800, /* Width */
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600, /* Height */
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8, /* Character cell width */
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16, /* Character cell height */
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1, /* Number of memory planes */
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8, /* Bits per pixel */
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1, /* Number of banks */
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VBE_MODEL_PACKED, /* Memory model */
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0, /* Bank size */
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7, /* Number of image pages */
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0, /* Reserved field */
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0, /* Red mask size */
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0, /* Red field position */
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0, /* Green mask size */
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0, /* Green field position */
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0, /* Blue mask size */
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0, /* Blue field position */
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0, /* Reserved mask size */
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0, /* Reserved field position */
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0, /* Direct color info */
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};
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static SVGA_REGISTERS VbeMode_800x600x256_Registers =
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{
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/* Miscellaneous Register */
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0x63,
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/* Hidden Register */
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0x00,
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/* Sequencer Registers */
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{
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0x03, 0x21, 0x0F, 0x00, 0x0E, 0x00, 0x12, 0x11, 0x00, 0x00, 0x18, 0x23,
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0x23, 0x23, 0x23, 0x98, 0x00, 0x00, 0x04, 0x00, 0x00, 0x04, 0x00, 0x20,
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0x00, 0x00, 0x00, 0x14, 0x14, 0x14, 0x14, 0x2D
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},
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/* CRTC Registers */
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{
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0x7D, 0x63, 0x63, 0x80, 0x6B, 0x1A, 0x98, 0xF0, 0x00, 0x60, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x7D, 0x23, 0x57, 0x64, 0x40, 0x57, 0x98, 0xC3,
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0xFF, 0x00, 0x00, 0x22, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0xFF,
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0x80, 0x00, 0x20, 0xB8
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},
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/* GC Registers */
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{
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0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x05, 0x0F, 0xFF, 0x00, 0x00, 0x20,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00
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},
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/* AC Registers */
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{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
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0x0C, 0x0D, 0x0E, 0x0F, 0x41, 0x00, 0x0F, 0x00, 0x00
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}
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};
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static const VBE_MODE Modes[VBE_MODE_COUNT] =
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{
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{ 0x14, 0xFFFF, NULL , NULL /* TODO */ },
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{ 0x54, 0x10A , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x55, 0x109 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x58, 0x102 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x5C, 0x103 , &VbeMode_800x600x256_Info, &VbeMode_800x600x256_Registers },
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{ 0x5D, 0x104 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x5E, 0x100 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x5F, 0x101 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x60, 0x105 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x64, 0x111 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x65, 0x114 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x66, 0x110 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x67, 0x113 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x68, 0x116 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x69, 0x119 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x6C, 0x106 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x6D, 0x107 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x71, 0x112 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x72, 0xFFFF, NULL , NULL /* TODO */ },
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{ 0x73, 0xFFFF, NULL , NULL /* TODO */ },
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{ 0x74, 0x117 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x75, 0x11A , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x76, 0xFFFF, NULL , NULL /* TODO */ },
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{ 0x78, 0x115 , NULL /* TODO */ , NULL /* TODO */ },
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{ 0x79, 0x118 , NULL /* TODO */ , NULL /* TODO */ },
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};
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/* PRIVATE FUNCTIONS **********************************************************/
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@ -207,6 +289,9 @@ BOOLEAN WINAPI VbeSetExtendedVideoMode(BYTE ModeNumber)
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/* Update the current video mode in the BDA */
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Bda->VideoMode = ModeNumber;
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/* Clear the screen */
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VgaClearMemory();
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return TRUE;
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}
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@ -218,16 +303,54 @@ VOID WINAPI VbeResetExtendedRegisters(VOID)
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BOOLEAN Interrupts = getIF();
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setIF(0);
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/* Reset the extended sequencer registers */
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for (i = SVGA_SEQ_EXT_MODE_REG; i < SVGA_SEQ_MAX_REG; i++)
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/* Turn the video off */
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IOWriteB(VGA_SEQ_INDEX, VGA_SEQ_CLOCK_REG);
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IOWriteB(VGA_SEQ_DATA , IOReadB(VGA_SEQ_DATA) | VGA_SEQ_CLOCK_SD);
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/* Synchronous reset on */
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IOWriteB(VGA_SEQ_INDEX, VGA_SEQ_RESET_REG);
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IOWriteB(VGA_SEQ_DATA , VGA_SEQ_RESET_AR );
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/* Clear the extended sequencer registers, except for the VCLKs and MCLK */
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for (i = SVGA_SEQ_EXT_MODE_REG; i < SVGA_SEQ_VCLK0_DENOMINATOR_REG; i++)
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{
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if (i != VGA_SEQ_MAX_REG && i != SVGA_SEQ_UNLOCK_REG)
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if (i != VGA_SEQ_MAX_REG && i != SVGA_SEQ_UNLOCK_REG
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&& (i < SVGA_SEQ_VCLK0_NUMERATOR_REG || i > SVGA_SEQ_VCLK3_NUMERATOR_REG))
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{
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IOWriteB(VGA_SEQ_INDEX, i);
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IOWriteB(VGA_SEQ_DATA, 0x00);
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}
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}
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/* Reset the VCLKs */
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK0_NUMERATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x66);
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK0_DENOMINATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x3B);
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK1_NUMERATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x5B);
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK1_DENOMINATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x2F);
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK2_NUMERATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x45);
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK2_DENOMINATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x30);
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK3_NUMERATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x7E);
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_VCLK3_DENOMINATOR_REG);
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IOWriteB(VGA_SEQ_DATA, 0x33);
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/* Reset the MCLK */
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IOWriteB(VGA_SEQ_INDEX, SVGA_SEQ_MCLK_REG);
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IOWriteB(VGA_SEQ_DATA, 0x1C);
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/* Synchronous reset off */
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IOWriteB(VGA_SEQ_INDEX, VGA_SEQ_RESET_REG);
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IOWriteB(VGA_SEQ_DATA , VGA_SEQ_RESET_SR | VGA_SEQ_RESET_AR);
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/* Reset the extended CRTC registers */
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for (i = SVGA_CRTC_INTERLACE_END_REG; i < SVGA_CRTC_MAX_REG; i++)
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{
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@ -256,6 +379,10 @@ VOID WINAPI VbeResetExtendedRegisters(VOID)
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for (i = 0; i < 4; i++) IOReadB(VGA_DAC_MASK);
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IOWriteB(VGA_DAC_MASK, 0x00);
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/* Turn the video on */
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IOWriteB(VGA_SEQ_INDEX, VGA_SEQ_CLOCK_REG);
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IOWriteB(VGA_SEQ_DATA , IOReadB(VGA_SEQ_DATA) & ~VGA_SEQ_CLOCK_SD);
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/* Restore interrupts */
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setIF(Interrupts);
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}
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@ -356,7 +483,7 @@ VOID WINAPI VbeService(LPWORD Stack)
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WORD VesaNumber = getBX();
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setAL(0x4F);
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if (getBX() <= BIOS_MAX_VIDEO_MODE)
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if (VesaNumber <= BIOS_MAX_VIDEO_MODE)
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{
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/* Call the VGA BIOS */
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setAH(0x00);
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@ -90,13 +90,15 @@ typedef struct _VBE_MODE_INFO
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C_ASSERT(sizeof(VBE_MODE_INFO) % sizeof(WORD) == 0);
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typedef const struct _VBE_MODE_INFO *PCVBE_MODE_INFO;
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#pragma pack(pop)
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typedef struct _VBE_MODE
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{
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BYTE Number;
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WORD VesaNumber;
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PVBE_MODE_INFO Info;
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PCVBE_MODE_INFO Info;
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PSVGA_REGISTERS Registers;
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} VBE_MODE, *PVBE_MODE;
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@ -1673,6 +1673,13 @@ COORD VgaGetDisplayResolution(VOID)
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Resolution.Y++;
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if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
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{
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/* In "High Resolution" mode, the width of a character is always 8 pixels */
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if (VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES)
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{
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Resolution.X *= 8;
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}
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else
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{
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/* Multiply the horizontal resolution by the 9/8 dot mode */
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Resolution.X *= (VgaSeqRegisters[VGA_SEQ_CLOCK_REG] & VGA_SEQ_CLOCK_98DM)
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@ -1681,6 +1688,7 @@ COORD VgaGetDisplayResolution(VOID)
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/* The horizontal resolution is halved in 8-bit mode */
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if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT) Resolution.X /= 2;
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}
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}
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if (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & VGA_CRTC_MAXSCANLINE_DOUBLE)
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{
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