Tube Time
Tube Time
or just time out and release the bus arbitration lines. then try again with the DMA operation later.
I'll have to spend some time thinking about it. Another possibility is to add an external RC delay although that is less precise.
I'd like to design a 16MB SIMM, but I don't have any way of testing it. In principle it should be relatively simple.
If any of you know someone who owns a 16MB SIMM, it would be helpful to get a scan of the front and back.
Nobody has sent any photos, and since I don't have any GVP devices that use the 16MB SIMMS, there's no way I can deduce the pin connections.
16MB version (beta) is now available.