Re: Apple IIgs Crashed

["Bill Garber" <willy46pa@comcast.net>]

<kirkmitchell@gmail.com> wrote in message 
1124673118.523229.35660@g14g2000cwa.googlegroups.com">news:1124673118.523229.35660@g14g2000cwa.googlegroups.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.

The MicroDrive and MicroDrive Turbo IDE card manuals specifically
state to use an external power supply to power the hard drives.

Bill Garber

>>     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