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Ilia Sharin 2026-04-26 14:46:18 -04:00
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01_hardware/ocs_a500/custom_registers.md
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@ -103,7 +103,7 @@ bit 15: HIRES (1 = 640 pixel wide)
bit 14-12: BPU2-0 (number of bitplanes: 0–6)
bit 11: HAM (1 = Hold-And-Modify mode)
bit 10: DPF (dual playfield)
bit 9: COLOR (0 = monochrome, 1 = colour)
bit 9: COLOR (0 = monochrome, 1 = color)
bit 8: GAUD (genlock audio)
bit 7-4: (various, OCS = 0)
bit 1: ERSY (external sync)
@ -165,16 +165,16 @@ bit 0: ECSENA (ECS enable — must be 0 on OCS)
| $09E | ADKCON | W | Audio / disk control (write) |
| $07C | DSKSYNC | W | Disk sync word |
## Colour Registers
## Color Registers
| Offset | Name | Dir | Description |
|---|---|---|---|
| $180 | COLOR00 | W | Background / colour 0 |
| $182 | COLOR01 | W | Colour 1 |
| $180 | COLOR00 | W | Background / color 0 |
| $182 | COLOR01 | W | Color 1 |
| ... | | | |
| $1BE | COLOR31 | W | Colour 31 |
| $1BE | COLOR31 | W | Color 31 |
OCS colours: 12-bit RGB (4 bits per component, $0RGB format).
OCS colors: 12-bit RGB (4 bits per component, $0RGB format).
## References