I haven't had any need for transferring that large about of data around on the Amiga at this time. Thanks for the heads up. I am new to Amiga and still getting familiar with the system. I am currently using a parallel port connected floppy drive on a windows xp PC to write to mf2dd disks to get media on the Amiga.GadgetUK164 wrote: ↑Sun Aug 01, 2021 6:01 pm Worth trying a long file copy (not related to the 536) but the A2091. eg. copy say 500Mb of files from one drive to another. That's where I found I needed ALS chips on my A2091, and at the databus end on the A2000. You might be lucky in that your A2000 has other differences somewhere. But no matter what I did, the A2091 always failed on large file copies on 3 x A2000 boards. That's no using the 536 - any other processor that problem occured with.
SCSI when using the 536 will however be dead slow - eg. 100KB/s or less. Whilst it might not feel slow, benchmark it with SysInfo and you should see it's pretty slow.
I will give it a try if I can find a way to get that amount of data on the drive to move around. Is this transfer from one drive to another on the same controller or a drive on another controller?
Do any of the GVP ram/scsi cards have the same issue?
Will try with a 68k and 68010 as well.
With the 74ALS245N, you change out the two on the A2091 and the 6 on the A2000 between the CPU slot and first ZII slot?
Have watched a few of your videos, how came to realize that one of the A2091s I have, has a dead DMAC chip.