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Video (TG-16)
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Video Color Encoder (HuC6260)
The VCE has two functions:
- supply the picture on your television.
- define the location of the palettes in memory.
- Note: all registers are 16 bit.
$0400 - CR - Control Register
Write only register.
| Bit(s) | Description | Values |
|---|---|---|
| 0 - 1 | PCC - Pixel Clock Control |
00 = 5.3693175 MHz 01 = 7.15909 MHz 10 = 10.738635 MHz 11 = 10.738635 MHz |
| 2 | Frame/Field Configuration |
0 = 262-line frame 1 = 263-line frame |
| 3 - 6 | ??? | ??? |
| 7 | Strip Colorburst |
0 = Colorburst intact 1 = Strip colorburst |
| 8 - 15 | (unused) |
$0402 - CTA - Color Table Address Register
Write only register.
| Bit(s) | Description | Values |
|---|---|---|
| 0 - 8 | index for the color table | 0 to 511 |
| 9 - 15 | (unused) |
Note: This register is auto-incremented after each access to the color data register.
$0404 - CTW - Color Table Write Register / CTR - Color Table Read Register
Write/Read register.
Access (read/write) to this register causes CTA register to increment.
| Bit(s) | Description |
|---|---|
| 0 - 2 | Blue |
| 3 - 5 | Red |
| 6 - 8 | Green |
| 9 - 15 | (unused) |