UHRES sprite vertical display stop
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPRHWRM | 0 | 0 | 0 | 0 | 0 | V10 | V9 | V8 | V7 | V6 | V5 | V4 | V3 | V2 | V1 |
SPRHWRM = Swaps the polarity of ARW* when the SPRHDAT comes out so that external devices can detect the RGA and put things into memory. (ECS and later chips only)