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3D printed programmers switches; Random SE/30 reboots
- Thread starter Mk.558
- Start date
Me neither. I was just trying to illustrate that original ROM's come up every now and again. Personally, I'd have no qualms about replacing with a custom or later ROM, but some folk crave "originality".
The reason I wish to retain the original ROMs is for:
A) Compatibility
B) I'd like to use a 030 accelerator on it, for which the designer stated that original ROMs are ideal
C) having a few minor quirks like switching to 32-bit mode just makes it a bit more authentic. Ish.
Hard drives though? Well I've touched 4 dead hard drives in the past 2 days on 3 different machines.
As for the SE/30, I think I narrowed down on the problem. The original idea some years ago was to have 20MiB of RAM. That is:
[4MB][4MB][4MB][4MB][1MB][1MB][1MB][1MB]
However I think what happened was 3 things:
A) This probably happened at some point:
[4MB][4MB][4MB][4MB][4MB][4MB][1MB][1MB]
.... or:
[4MB][4MB][4MB][4MB][1MB][1MB][4MB][4MB]
... or some other combination that is unacceptable.
B) One pairing of those 4MB modules is probably bad. Although I believe I tested every single module pair on a LCII with Snooper, putting that one said pair back into it so the LCII would have 10MiB of memory instead of 6MiB means that it bombs with a bad F-line instruction error with MacTCP upon bootup.
C) Although the original ROM SIMM checksums OK and did work for a bit, I really don't want to fight it anymore because of how long this has been down, but also with previous Sad Mac errors. So it may be OK, but I can't prove it and with the "meh" condition of the contacts, considering I have the newer ROM SIMM programmed in, why not use it.
It's running Snooper with 20MiB as we speak, with RAM modules that passed tests on the LCII, on test 12 with 0 failed.
As for that UK ROM SIMM, yeah I'd consider that a hard pass. Should anyone around my area need a ROM programmer, they're free to use it, as I won't need it much.
A) Compatibility
B) I'd like to use a 030 accelerator on it, for which the designer stated that original ROMs are ideal
C) having a few minor quirks like switching to 32-bit mode just makes it a bit more authentic. Ish.
Hard drives though? Well I've touched 4 dead hard drives in the past 2 days on 3 different machines.
As for the SE/30, I think I narrowed down on the problem. The original idea some years ago was to have 20MiB of RAM. That is:
[4MB][4MB][4MB][4MB][1MB][1MB][1MB][1MB]
However I think what happened was 3 things:
A) This probably happened at some point:
[4MB][4MB][4MB][4MB][4MB][4MB][1MB][1MB]
.... or:
[4MB][4MB][4MB][4MB][1MB][1MB][4MB][4MB]
... or some other combination that is unacceptable.
B) One pairing of those 4MB modules is probably bad. Although I believe I tested every single module pair on a LCII with Snooper, putting that one said pair back into it so the LCII would have 10MiB of memory instead of 6MiB means that it bombs with a bad F-line instruction error with MacTCP upon bootup.
C) Although the original ROM SIMM checksums OK and did work for a bit, I really don't want to fight it anymore because of how long this has been down, but also with previous Sad Mac errors. So it may be OK, but I can't prove it and with the "meh" condition of the contacts, considering I have the newer ROM SIMM programmed in, why not use it.
It's running Snooper with 20MiB as we speak, with RAM modules that passed tests on the LCII, on test 12 with 0 failed.
As for that UK ROM SIMM, yeah I'd consider that a hard pass. Should anyone around my area need a ROM programmer, they're free to use it, as I won't need it much.
