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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: papa_november on July 31, 2009, 11:13:08 PM

Title: Blizzard 1260 memory issues
Post by: papa_november on July 31, 2009, 11:13:08 PM

I'm working on an A1200T with a Mediator busboard and Blizzard 1260 accelerator. It seems to work perfectly, except I'm getting errors when I run ICD MemTest.

    It came with a 64MB SIMM in the onboard socket and an 8MB SIMM in the SCSI-KIT socket. I've tried a whole bunch of SIMMs and they all seem to have problems - either they are seen as the wrong size or they have errors as well.

    I can't test the machine without the Mediator as that's the only way it gets power. Could the Mediator be causing false alarms or is there something wrong with the accelerator?

Title: Re: Blizzard 1260 memory issues
Post by: xyzzy on August 01, 2009, 01:27:21 AM

Have you tried just the 64MB simm by itself?

Title: Re: Blizzard 1260 memory issues
Post by: amigadave on August 01, 2009, 06:39:10 AM

Quote from: papa_november;517581

I'm working on an A1200T with a Mediator busboard and Blizzard 1260 accelerator. It seems to work perfectly, except I'm getting errors when I run ICD MemTest.

    It came with a 64MB SIMM in the onboard socket and an 8MB SIMM in the SCSI-KIT socket. I've tried a whole bunch of SIMMs and they all seem to have problems - either they are seen as the wrong size or they have errors as well.

    I can't test the machine without the Mediator as that's the only way it gets power. Could the Mediator be causing false alarms or is there something wrong with the accelerator?

Dumb question, but could the problem be with the memtest you are using, which may only be designed to work with the very old ICD memory add-on board(s)?

Title: Re: Blizzard 1260 memory issues
Post by: papa_november on August 04, 2009, 08:12:52 PM

I tried a couple of other memory testing programs and they aren't reporting any problems. I've been using ICD MemTest because it seems to work on a wide variety of systems(so far), but maybe it's possible it doesn't like 060 machines? It was written before the 060 was available, so that could definitely be a possibility.

It's given a false negative once before on an Oktagon SCSI card, but I guess that isn't an isolated case. Maybe it's seeing non-RAM areas as RAM?

Title: Re: Blizzard 1260 memory issues
Post by: Prosatanos on August 04, 2009, 08:51:11 PM

Quote from: papa_november;518024

It's given a false negative once before on an Oktagon SCSI card, but I guess that isn't an isolated case. Maybe it's seeing non-RAM areas as RAM?

Your system can work properly, (without crashes, strange things) even some bit errors exists. If all memory seems to be bad, then possible the test prg is wrong, or socket contacts, or the controller is faulty. In this case Your system should be hard crashes, hangs allways.
 
Check memory timings. If ok, and all works fine, i bet: the test prg.