General Category > Lisa Troubleshooting and Repair
Lisa Sun Remarketing scsi card 92 error
bmwcyclist:
--- Quote from: sigma7 on June 07, 2025, 01:51:56 pm ---Even so, I would try removing the terminators, or disable the BlueSCSI terminators so there is only one set in use.
You can examine the expansion card ROM from service mode.
--- End quote ---
Terminators removed.
Slot 1 Test 1, BlueSCSI plugged in but no external power
007F BBFF 007F.... etc.
Slot 1 Test 2, BlueSCSI plugged in with power on.
007F EF7F 007F.... ect.
sigma7:
--- Quote from: bmwcyclist on June 07, 2025, 07:51:01 pm ---Slot 1 Test 1, BlueSCSI plugged in but no external power
--- End quote ---
When the Lisa CPU is reading an expansion card's ROM, in most (and perhaps all) cases, external devices attached to the expansion card are not involved (so it shouldn't matter if there is a BlueSCSI attached, or a parallel drive/printer attached to a dual parallel card, etc.)
--- Quote from: bmwcyclist on June 07, 2025, 07:51:01 pm ---007F BBFF 007F.... etc.
...
007F EF7F 007F.... ect.
--- End quote ---
... that indicates a problem... the SCSI card ROM shouldn't be reading as 7F FF 7F, nor as 7F 7F 7F.
And perhaps it indicates two problems, since a blank ROM would be FF FF FF and if everything else is ok, the ROM data should be repeatable.
The problem with the high bit may be due to a poor contact at the edge connector... sliding the card up and down slightly after installation can help "wipe" the contacts and improve the connection.
If the high bit is still unreliable, try the other slots to see if it is slot dependent.
If you have another 2716 EPROM (from eg. a Dual Parallel card) with known contents, I suggest you install that in the SCSI card to see if service mode can read that ROM properly.
bmwcyclist:
--- Quote from: sigma7 on June 07, 2025, 11:35:05 pm ---
... that indicates a problem... the SCSI card ROM shouldn't be reading as 7F FF 7F, nor as 7F 7F 7F.
And perhaps it indicates two problems, since a blank ROM would be FF FF FF and if everything else is ok, the ROM data should be repeatable.
The problem with the high bit may be due to a poor contact at the edge connector... sliding the card up and down slightly after installation can help "wipe" the contacts and improve the connection.
If the high bit is still unreliable, try the other slots to see if it is slot dependent.
If you have another 2716 EPROM (from eg. a Dual Parallel card) with known contents, I suggest you install that in the SCSI card to see if service mode can read that ROM properly.
--- End quote ---
Ok. so cleaned all of the slots with DeoxIT and the card. All look bright and clean.
Insterted card BROKE plastic clip and I was not strong-arming it. Does anyone have a 3D print file for these?
Ran test 3 times, results in attached photos.
Still not happy about booting with the card installed.
sigma7:
--- Quote from: bmwcyclist on June 08, 2025, 12:08:52 pm ---Ran test 3 times, results in attached photos.
--- End quote ---
Try the other slots to see if there is any difference (maybe you already did, but I think the pics show slot 2 only). The problem may be the card or it may be the slot.
edit: earlier on you had tried slot 1, so try slot 3 if you haven't yet. And/or if you have another expansion card (eg. Dual Parallel) that would be useful to check the slots are in working order.
Trying a known good EPROM (from some other device) in the SCSI card will also be helpful to determine if it is the card or the EPROM that is the issue.
After all these years, the yellow cams on the ZIF sockets do break pretty easily. If you are extremely careful to slide and hold the card all the way in before closing the ZIF you can minimize the chance of breaking a cam.
As mentioned later-on in the thread "Sun Remarketing SCSI card: A cautionary tale", I've been experimenting with 3D printed replacement cams. I had posted there about trying GF Nylon SLS -- I've concluded it wasn't the right material to use, so ordered and have received the Aluminum SLS variety, which I think will be the winner, more to come.
bmwcyclist:
I have tried all of the slots, no good.
I do not have a ROM chip or other Lisa cards.
Any sources to recommend?
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