Basically I have been copying files from my CF IDE to spinning rust SCSI drive.
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But it hangs.. The mouse still moves then about half an hour later it pops up...
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I copied files one at a time, and it stopped copying at a ~8.7MB file. The one which did copy before was ~ 6.5MB . So smaller than about 7MB files seem to copy fine. But larger files don't.
I suspect its a write problem to SCSI. The IDE card lights up for a few seconds then nothing happens. I copied the files off the IDE card on my PC and they copied off fine.
I think a huge clue is that if I replace the STram card with a 4MB one, the files copy just fine. I tried 2 different 14MB cards with same copying problems.
The clock patch I used in my first test was a simple noninverting buffer with a PLL to keep the SDMA clock in proper sync with the system clock.
I just changed the clock patch for a V3 type (inverting) and no change. I used delay ON and delay OFF, no change.
This is what seems to be the latest clock patch mentioned by Atari. But so far buffering and delays do not seem to have any effect.. Unless there really has to be some specific delay there which does not happen with the F04 inverter.
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It has the CPU clock in sync with the combel. But inverterts the FPU/SDMA/EXP clock.
So I reconnected the CPU clock back to combel , bypassing the inverter and made no difference either.
While the SDMA clock needs buffering for typical "pops in the audio" it doesn't seem to make any odds with my SCSI file transfer issues.
At this point I'm not sure what else to try
