Re: Apple IIgs Crashed

["kirkmitchell@gmail.com" <kirkmitchell@gmail.com>]

Bryan Parkoff wrote:
> Apple IIgs with ROM 01 has been running for 1 to 3 hours.  It can go
> wrong while byte by byte in the memory are modified without my authorization
> which it is like byte by byte garbage.  For example, I have written
> AppleSoft BASIC with 200 lines.  I typed, "RUN" command about 20 to 30
> times.  It failed to run after 20 to 30 times.  It is like to report,
> "SYNTAX ERROR" or it goes to monitor prompt at random time.
>     Another example, I was on ProDOS 8.  I type, "LOAD TEST".  ProDOS 8
> reports, "FILE NOT FOUND", but it works fine several minutes earlier.
>     I suspect that Applesoft routines and ProDOS 8 routines may have already
> overwritten with byte by byte garbage.  The result could be the power
> supply's outage less than one second at random time.  The power supply can
> cause to damage or overwrite sector by sector in error on 3.5 / 5.25 floppy
> disk and hard drive.  It can corrupt the root directory and/or partition
> information.  It would require to reformat from the beginning.

While it may be the power supply, you may want to try pushing loose
chips back into their sockets, particularly on the memory card.  The
CPU is another chip that can come loose.

>     My power supply is Vulcan.  It has two 2 GB hard drives inside Vulcan
> power supply with Turbo IDE card which it was modified by myself.  I believe
> that two hard drives may have stolen too much power which it causes not to
> give enough power to the Apple IIgs' motherboard.

Try running it without the lid on as well, to see if it might be a heat
problem.

>     I have found naked 3" X 5" power supply board from any electronic store
> which it has same +/-5V and +/-12V.  It can replace the half defective power
> supply board inside Vulcan unit.
>     I can't be certain how much maximum AMPs are required to sustain enough
> power.
>     If it does not resolve the problem, I would have to use standard power
> supply and put two hard drives externally to the Turbo IDE card.  I may be
> required to replace thin wire to thick wire inside standard power supply.
> Please advise.
>

I've run a GS on an AT powersupply for years.  Disadvantages are having
a silver brick itting beside your GS.  Advantage is that the heat isn't
being dumped inside the GS case.

Try reseating your socketed chips first.

Kirk