On the 710, I had a 256-80 that did the same darn thing. The problem turned
out to be a RAM chip. You might try going into the monitor (don't know the
SYS off the top of my head), and dumping the several banks of RAM to look
for bits that are suspiciously ON or OFF all the time (the values, by
default will alternate).
- Bo
> -----Original Message-----
> From: owner-cbm-hackers@cling.gu.se
> [mailto:owner-cbm-hackers@cling.gu.se]On Behalf Of Adrian Vickers
> Sent: Tuesday, February 12, 2002 5:21 PM
> To: cbm-hackers@cling.gu.se
> Subject: 8250LP - fault, how to fix?
>
>
> Hi,
>
> As per the subject, I've just picked up one of these drives in excellent
> cosmetic condition. Trouble is, the LEDs flash red - 5 times, pause, 5
> times, etc.
>
> According to the FAQ, this means:
>
> "Zero Page - 6530, K3, 6504, H3"
>
> Unfortunately, I've not a clue what this means....
>
> The 710 I had the drive hooked up to hangs if you try to access any disk
> functions (e.g. ds$, diR, run/stop, etc.). I've verified using a
> different
> drive (8050) that both the 710 and the connectors are in fine
> fettle. Also,
> the drive flashes away when not connected to anything...
>
> I've tried re-seating all the pluggable chips, both on the
> mainboard & the
> little daughterboard. All to no avail.
>
> I'm *guessing* that maybe an EPROM's gone wonky on me? OTOH, that
> is just a
> guess, and I've not a clue where to go from here. So, any help most
> gratefully accepted!
>
> Thanks in advance!
> --
> Cheers, Ade.
> Be where it's at, B-Racing!
> http://b-racing.co.uk
>
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