| Name: | HDMA layer 3 position in status bar IRQ |
| Author: | spooonsss |
| Added: | |
| Tool: | Asar |
| Requires Free Space: | Yes |
| Bug Fix: | No |
| Featured: | No |
| Description: | Uses HDMA in IRQ to update Layer 3 position. This fixes visual issues when HDMA is used to update positions on other layers (e.g. Effect Tool parallax), which may interleave with the CPU storing to position registers in the status bar IRQ routine. It also saves h-blank time, so more HDMA transfers may be used. Mode 7 rooms are unchanged. Uses 5 bytes of free RAM. Not SA-1 compatible. Requires FastROM. |
| Tags: | hdma lorom timing |
| Comments: | 2 (jump to comments) |
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2.00 KiB | 103 downloads
Comments (2)
A version for SA-1 might be possible, but that would require changes to the SA-1 pack's version of the IRQ routine.