Sprite test disarm1 fails

[dirkwhoffmann]

Likely related to #715.

The test draws all seven sprites and utilizes the Copper to write into SPRxCTL around the same time the register is written by DMA.

A500 ECS:

Latest vAmiga:

The error might be due to dropped register writes on the real machine.

Next step:

The sprdrop test folder already contains tests for verifying the correct write-dropping behaviour for SPRxPTL and SPRxPTH. Write similar tests for SPRxPOS and SPRxCTL.

[dirkwhoffmann]

The tests have been replaced by better ones: interfere1 to interfere6 and interfere1b to interfere6b in folder Denise/Sprites/sprma (vAmigaTS repo).

Together, the tests suggest the following:

• Writes to SPRxPOS and SPRxCTL are delayed by 2 DMA cycles.
• A DMA write to SPRxPOS and SPRxCTL is dropped when SPRxCTL was written one cycle earlier.

The latest version on the dev branch passes all 12 interfere tests.

[dirkwhoffmann]

Fixed in v2.5b1