TF536 compatibility with A2091 SCSI Card

68030 + SDRAM + IDE

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Asmodeusbell
Posts: 2
Joined: Sat Jul 31, 2021 7:58 pm

Re: TF536 compatibility with A2091 SCSI Card

Post by Asmodeusbell » Sun Aug 01, 2021 8:48 pm

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 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.

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.

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GadgetUK164
Posts: 373
Joined: Fri Jan 04, 2019 2:26 pm

Re: TF536 compatibility with A2091 SCSI Card

Post by GadgetUK164 » Mon Aug 02, 2021 1:24 pm

Asmodeusbell wrote:
Sun Aug 01, 2021 8:48 pm
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 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.

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.
Thanks! The only 245's I've swapped out in the zorro area are the two at the bottom which buffer the databus. And the two on the A2091. The long file copy issue with the A2091 tends to occur copying from one drive to another (on the same controller) - even partition to partition would cause it. It's possible its related to the DMAC version - honestly no idea, what I do know is I found a few other people that had exactly that same problem with the A2091. And as I say - this has nothing to do with the TF536! That did have a similar issue which was resolved with RC3 I think. The GVP cards dont have the same issue.
My YouTube Channel - www.youtube.com/GadgetUK164

matt020
Posts: 226
Joined: Sun Sep 29, 2019 9:17 am
Location: West Australia

Re: TF536 compatibility with A2091 SCSI Card

Post by matt020 » Mon Aug 02, 2021 2:00 pm

GadgetUK164 wrote:
Mon Aug 02, 2021 1:24 pm
And as I say - this has nothing to do with the TF536! That did have a similar issue which was resolved with RC3 I think. The GVP cards dont have the same issue.
I haven't upgraded to RC3 yet, but I do have a problem with the TF536 and GVP HC8+. I went out and sourced this card specifically to get around this problem, and yeah, they don't gel (don't get along).

pipper
Posts: 40
Joined: Tue Apr 23, 2019 5:55 am

Re: TF536 compatibility with A2091 SCSI Card

Post by pipper » Sun Aug 08, 2021 12:25 am

This is what you're looking for: http://aminet.net/package/driver/media/vbak2091
I had a chance to try this, but it didn't help with the performance. It may be due to the device driver used for the A590.
With a 3.2. Kick ROM installed I can see that the TF536's IDE scsi.device has version 47.4, while the 2nd.scsi.device responsible for the A590 carries version 37.41. (i guess thats what is stored in the A590's ROM?)

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