ZZ9000 Zorro 3 locking up

Hello

I have an A3000 with a ZZ9000 working fine. It’s an 030 model with 16MB Fast RAM.

I have another A3000 which locks up when drawing Workbench windows. I can accurately cause this to happen by running Intuispeed and it will lock up 100% of the time on any of the Workbench window tests (layers, resizing, moving). Outside of this benchmark, it seems to work fine but then will just lock up randomly when opening a drawer or starting an app after just a couple of minutes.

This A3000 has a A3660 but otherwise is the same.

I have tried rolling back to 1.8 firmware and drivers. I have tried the no fast firmware.

These 3000s are in Checkmate cases so they have a custom daughterboard. However it’s electrically the same, it just has 3 slots not 4. It works with other Zorro 2 and Zorro 3 cards such as Picasso 2, X-Surf 100. Also, the first 3000 works fine and I’ve swapped daughterboards with no improvement.

Are there any 060 compatibility issues? The only other difference between the machines is the working one has Ramsey 07, the unstable one Ramsey 04.

It seems focused on Intuition drawing, other graphics benchmarks like Linedrawing seem to work OK.

The Bus Test in ZZTop crashes instantly.

  • Amiga model: A3000
  • 680x0 CPU: 68RC060
  • RAM Configuration: 2MB Chip, 16MB Fast in ZIP
  • Kickstart, AmigaOS Versions: 3.2
  • ZZ9000 Firmware version: 1.9.1
  • ZZ9000 Driver version: 1.9
  • Monitor model: Dell 2410 (supports 50Hz)
  • Other Zorro cards: none