13 Apr
2011
13 Apr
'11
9:04 a.m.
On Mon, 11 Apr 2011, Steven Hirsch wrote:
Update: I took the plunge (so to speak) and soaked the motherboard and I/O
board in vinegar for a few hours to neutralize any remaining battery
leakage (had previously cleaned it with PCB flux solvent). This seems to
have done the trick, so there must have been some crud embedded where I
could not see it.
LisaTest is now happy with the ProFile. Onward to system installation (as
soon as I receive some disk copies that are on their way).
What I gather from this is that Lisa OS and LisaTest are far fussier in
their interaction with the ProFile than MacWorksXL. Perhaps the line
carrying the parity bit was not making contact and MacWorks wasn't
checking it?
The edge connectors on the rear of the chassis have been getting
progressively flakier as I've inserted and removed the motherboard and
card-cage. I'm going to have to take a divergence and replace the wiring
harnesses before going any further. It appears that the CRT will need to
come out in order to do this - fun!
Finally, does anyone know if there are later copies of the Profile
formatter EPROM floating around? I have one that works on 5M ProFiles,
but the formatter utility always complains about the version being
backlevel. At least one site on the web shows this procedure with no
complaints, so someone must have it. Would appreciate a copy or leads to
anyone who can help.
Steve
--
On Mon, 11 Apr 2011, Mr Ian Primus wrote:
> --- On Sun, 4/10/11, Steven Hirsch <snhirsch at gmail.com> wrote:
>
>> If I try to repair the disk, it tells me to contact a
>> service specialist and mentions error 200/662. There's
>> no error 200 listed in the Lisa repair manual, but 662 is
>> ProFile parity error. It's hard to believe that, since
>> the drive passes format and certify on an Apple /// and
>> MacWorksXL on the Lisa has no problem with it.
>>
Does the
Profile pass the test when running LisaTest?
No, it fails under LisaTest with the same odd symptoms: No sign that it's
even trying to access the disk! Just goes away for a a bit and announces a
fail. I never see the ProFile light flicker.
I'm starting to wonder if Lisa OS has stricter timing or perhaps checks
parity while MacOS does not.