x68000:crtc_registers
Differences
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| x68000:crtc_registers [2017/08/14 09:14] – neko68k | x68000:crtc_registers [2019/08/27 20:45] (current) – external edit 127.0.0.1 | ||
|---|---|---|---|
| Line 52: | Line 52: | ||
| └───────────────┴───────────────┘ | └───────────────┴───────────────┘ | ||
| HSYNC period × horiz width | HSYNC period × horiz width | ||
| - | R00 = ───────────────── -1 | + | R00 = ────────────────────────── -1 |
| - | | + | |
| ※LSB must be 1 | ※LSB must be 1 | ||
| Line 62: | Line 62: | ||
| └───────────────┴───────────────┘ | └───────────────┴───────────────┘ | ||
| HSYNC pulse width × horiz width | HSYNC pulse width × horiz width | ||
| - | R01 = ─────────────────── -1 | + | R01 = ───────────────────────────────── -1 |
| - | Display period × 8 | + | Display period × 8 |
| CRTC R02($e80004): | CRTC R02($e80004): | ||
| Line 71: | Line 71: | ||
| └───────────────┴───────────────┘ | └───────────────┴───────────────┘ | ||
| (HSYNC pulse width ＋ horiz back porch) × horiz width | (HSYNC pulse width ＋ horiz back porch) × horiz width | ||
| - | R02 = ───────────────────────────── -5 | + | R02 = ───────────────────────────────────────────────────── -5 |
| - | Display period × 8 | + | Display period × 8 |
| CRTC R03($e80006): | CRTC R03($e80006): | ||
| Line 80: | Line 80: | ||
| └───────────────┴───────────────┘ | └───────────────┴───────────────┘ | ||
| (HSYNC pulse width － horiz front porch) × horiz width | (HSYNC pulse width － horiz front porch) × horiz width | ||
| - | R03 = ────────────────────────────── -5 | + | R03 = ────────────────────────────────────────────────────── -5 |
| - | Display period × 8 | + | Display period × 8 |
| CRTC R04($e80008): | CRTC R04($e80008): | ||
| Line 89: | Line 89: | ||
| └───────────────┴───────────────┘ | └───────────────┴───────────────┘ | ||
| VSYNC period | VSYNC period | ||
| - | R04 = ──────── -1 | + | R04 = ──────────── -1 |
| HSYNC period | HSYNC period | ||
| Line 98: | Line 98: | ||
| └───────────────┴───────────────┘ | └───────────────┴───────────────┘ | ||
| VSYNC pulse width | VSYNC pulse width | ||
| - | R05 = ────────── -1 | + | R05 = ───────────────── -1 |
| - | | + | HSYNC period |
| CRTC R06($e8000c): | CRTC R06($e8000c): | ||
| Line 107: | Line 107: | ||
| └───────────┴───────────────────┘ | └───────────┴───────────────────┘ | ||
| VSYNC pulse width ＋ Vertical back porch | VSYNC pulse width ＋ Vertical back porch | ||
| - | R06 = ─────────────────── -1 | + | R06 = ──────────────────────────────────────── -1 |
| - | | + | HSYNC period |
| CRTC R07($e8000e): | CRTC R07($e8000e): | ||
| Line 116: | Line 116: | ||
| └───────────┴───────────────────┘ | └───────────┴───────────────────┘ | ||
| VSYNC pulse width － vertical front porch | VSYNC pulse width － vertical front porch | ||
| - | R07 = ────────────────── -1 | + | R07 = ───────────────────────────────────────── -1 |
| - | | + | HSYNC period |
| CRTC R08($e80010): | CRTC R08($e80010): | ||
| Line 131: | Line 131: | ||
| └───────────┴───────────────────┘ | └───────────┴───────────────────┘ | ||
| VSYNC pulse width + vertical back porch | VSYNC pulse width + vertical back porch | ||
| - | R09 = ─────────────────── ＋ raster number | + | R09 = ────────────────────────────────────────── ＋ raster number |
| - | HSYNC period | + | HSYNC period |
| = R06 +1 ＋ raster number | = R06 +1 ＋ raster number | ||
| Line 160: | Line 160: | ||
| └───────────┴───────────────────┘ | └───────────┴───────────────────┘ | ||
| ※In 512x512 mode bits 0~8 are effective. | ※In 512x512 mode bits 0~8 are effective. | ||
| + | |||
| CRTC R14($e8001c): | CRTC R14($e8001c): | ||
| bit 15 10 | bit 15 10 | ||
| Line 218: | Line 219: | ||
| %0 : Display | %0 : Display | ||
| %1 : Buffer(bit 10～8 are invalid) | %1 : Buffer(bit 10～8 are invalid) | ||
| - | (G-VRAM has the same structure | + | (G-VRAM |
| - | bit 10 SIZE Real screen | + | bit 10 SIZE GVRAM size |
| %0 : 512× 512 pixel | %0 : 512× 512 pixel | ||
| %1 : 1024×1024 pixel | %1 : 1024×1024 pixel | ||
| - | bit 9～8 COL Color mode | + | bit 9～8 COL GVRAM Color mode |
| %00 : 16 colors | %00 : 16 colors | ||
| %01 : 256 colors | %01 : 256 colors | ||
x68000/crtc_registers.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1