A4000 and GVP scsi

[adolescent]

700k/s doesn't sound that bad for the HC+8. Remember, the card is a ZorroII/16bit card and just isn't very fast.  I think I've seen benchmarks showing slightly over 1M/s but nothing more.  (and, that might have been the result of a GuruROM)

[adolescent]

I stand corrected.   I thought the Zorro II bus limit was less than it is (a little over 3.5M/s).

However, a quick search reminded me of the Zorro II DMA problem with certain versions of the A3640 (rev 3.1 and before).  The GuruROM documenation mentions this also.  I'd look here first.

[adolescent]

Lo wrote:

Whats this Guru Rom documentation site?

Not sure if he meant GVPbut a GURU ROM is very hard to find! :-x

I meant to look into the A3640 DMA problem first.   Sorry, my post didn't make much sense.  If you want to upgrade to a Guru ROM, they still show at www.softhut.com.  But, I think it won't help your problem.  I'd suggest upgrading your A3640 to rev3.2

[adolescent]

Debaser wrote:
Hey folks, a bit off the original topic but reguarding the A3640. I am toying with the idea of fitting my A3000 with my dead 4000's A3640 rev3.1. (lacks the LARGE heatsink) How hard is this really. I think Im in the clear because its a rev.3.1. And what should I fear with heat issues?

It will fit physically, but it mightl run a bit hot.  I'd watch the temps and see if they seem too high, and add a fan if needed (you might be able to find a 486 fan/heatsink that will fit under the drives).  

I thought the DMA problem was eleviated with rev.3.1 + anyhow..am I correct on this?

According to the Big Book of Amiga Hardware rev 3.1 has the Z2-DMA bug.