CompuServe Messages

Larry, I've seen the situation before that the 2090 driver can get lost, especially on large reads. I believe this is why the MaxTransfer trick works. When you're using TDebug, does it tell you where the data is being sent? I think that DPaint goes right to CHIP mem, where UShow may buffer to FAST first. From what I understand of the origional problem, the 2090 DMA overran the 64byte FIFO when talking to a SCSI device. That caused a R/W error that was especially bad when loading very large files. The later drivers attempted to fix this by internally trapping the error and reissuing the read command (driver to SCSI device) until the data was recieved properly. DMA'ing to CHIP memory when in 4 bitplane hires is the worst case. I think I know what the problem actually is with the 2090, and I believe it to be a hardware fault. One of these days I'll trace the circuit out and find out if I'm right. -Dean