General Category > Lisa Troubleshooting and Repair
Lisa Sun Remarketing scsi card 92 error
Kelly king:
I use internal hookup for my scsi board no problems but I’am
using a mechanical scsi hard drive. Never got the BlueSCSI to work
on external port.
bmwcyclist:
Interesting!
I don't know if I still have a SCSI drive around....
sigma7:
Sorry I wasn't clear... I meant pin 1 to pin 7 and pin 1 to pin 14 on the terminator part itself, but I think measuring 1 to 14 on the DB25 and comparing to a terminator is satisfactory to show the terminator is the correct part.
Even so, I would try removing the terminators, or disable the BlueSCSI terminators so there is only one set in use.
The SCSI expansion card does work in all 3 slots normally.
You can examine the expansion card ROM from service mode.
Once in service mode, type one of the following lines according to which slot the card is in:
The first "1" selects "Display memory" so it won't be shown on the screen. The second <return> is a null entry to the "Count?" query, which defaults to 0x10 bytes.
Slot 1
--- Code: ---1FC0000<return><return>
--- End code ---
Slot 2
--- Code: ---1FC4000<return><return>
--- End code ---
Slot 3
--- Code: ---1FC8000<return><return>
--- End code ---
Like almost all Lisa expansion cards, the SCSI expansion card ROM is 8 bits wide, so only half of each word displayed is coming from the ROM. That's the low byte (the right two characters of each word displayed).
The ID byte of the SCSI ROM is at offset 1 in the ROM, and should be 0x1B in this case. The rest of the ROM is zeros.
eg. if in slot 2, I would expect you to see
00FC4000 xx00 xx1B xx00 xx00 xx00 etc.
where xx is data not coming from the ROM (it might be random or coming from some other hardware on the card), so can be ignored in this case.
For completeness: if you had a QuickBoot ROM installed on the SCSI card instead of the SunRemarketing SCSI ROM, you'd see
00FC4000 xxE0 xx1B xx01 xx01 xx60 etc.
sigma7:
--- Quote from: Kelly king on June 07, 2025, 12:04:03 pm ---Never got the BlueSCSI to work on external port.
--- End quote ---
I have used the 25 pin BlueSCSI on the SR SCSI card successfully; feel free to start a new thread if you'd like some help troubleshooting.
bmwcyclist:
--- Quote from: sigma7 on June 07, 2025, 01:51:56 pm ---You can examine the expansion card ROM from service mode.
For completeness: if you had a QuickBoot ROM installed on the SCSI card instead of the SunRemarketing SCSI ROM, you'd see
00FC4000 xxE0 xx1B xx01 xx01 xx60 etc.
--- End quote ---
You are a national treasure! Thank you!
So... What are the ramifications of installing a QuickBoot ROM and are they available?
.
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