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More VGA register definitions

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Jeff Parsons 2015-05-26 15:17:04 -07:00 • committed by jeffpar
commit 9f03bfb049
1 changed files with 16 additions and 6 deletions
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22
modules/pcjs/lib/video.js
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@ -1186,20 +1186,30 @@ Card.ATC = {
},
PALETTE_REGS: 0x10, // 16 total palette registers
MODE: {
INDX: 0x10 // MODE CONTROL
INDX: 0x10, // Mode Control Register
GRAPHICS: 0x01, // bit 0: set for graphics mode, clear for alphanumeric mode
MONOEM: 0x02, // bit 1: set for monochrome emulation mode, clear for color emulation
TEXTGRCC: 0x04, // bit 2: set for line graphics in character codes 0xC0-0xDF, clear otherwise
TEXTBLINK: 0x08, // bit 3: set for text blink attribute, clear for background intensity attribute
RESERVED: 0x10, // bit 4: reserved
PANCOMPAT: 0x20, // bit 5: set for PEL panning compatibility
PELWIDTH: 0x40, // bit 6: set for 256-color modes, clear for all other modes
COLORSEL: 0x80 // bit 7: set for P5,P4 mapped to bits 1,0 of the Color Select register
},
OVRSCAN: {
INDX: 0x11 // OVERSCAN COLOR
INDX: 0x11 // Overscan Color Register
},
PLANES: {
INDX: 0x12, // COLOR PLANES
INDX: 0x12, // Color Plane Enable Register
MASK: 0x0F,
MUX: 0x30
MUX: 0x30,
RESERVED: 0xC0
},
HORZPAN: {
INDX: 0x13 // HORZ PANNING
INDX: 0x13, // Horizontal PEL Panning Register
SHIFT_LEFT: 0x0F // bits 0-3 indicate # of PELs to shift left
},
COLOR_SELECT: {
COLORSEL: {
INDX: 0x14, // VGA ONLY: Color Select Register
S_COLOR_7: 0x08, // selects bit 7 of 8-bit color values sent to DAC (except 256-color modes)
S_COLOR_6: 0x04, // selects bit 6 of 8-bit color values sent to DAC (except 256-color modes)