Re: More //c woes...

[Stephen Shaw <stephen@apple2.org.invalid.za>]

On 21 Jun 2002 00:08:35 GMT, O Aaland wrote:

> << Simon Williams wrote:
>
>> Seems like the //c is getting a lot of airplay these days, so here's
>> my two bits (should that be 8?)
>>
>> I've found that when I'm fiddling about in AppleSoft on my //c (can't
>> remember which version, but the one that supports UniDisk,
>> anyway...)...
>>
>> Uh, where was I ??? Yes, fiddling.
>> After a while the //c starts to ignore my input. I'll be programming
>> away, LIST the program and voila! The last n lines are missing. This
>> is infuriating.
>>
>> So I type: SAVE MY.PROGRAM
>> //c sez: SYNTAX ERROR
>> I say: PR#6
>> //c sez: SYNTAX ERROR etc... you see the pattern.
>>
>> Typically this ends with me turning off the computer and turning it
>> back on after a minute or so, at which point the machine is acting
>> like it never happened and everything is still fine between us...
>>
>> The computer is well ventillated and does not heat up appreciably... I
>> tried to open it up the other day, but even after pulling all the
>> screws the case would not yield (which is probably for the best, since
>> that was as far as my plan went).
>>
>> Any thoughts?
> >>
>
>
> If you have a IIc that supports a 3.5 drive, any one ecept the earliest
> version, you can run the built in diagnostics. It is posible that you have
> a defective memory chip that causes problems when you try to use that area
> of memory.
>
> Hold down the option (closed apple) key while turning on the computer to
> run the dianostics. If nothing happens except random paterns on the screen
> you have the early ROM with no diagnotics. If after a minute or two you see
> SYSTEM GOOD or some other message then you have a self diagnosing machine.
> Early machines cane be updated by changing thr ROM chip.

I don't think the Apple IIC had the diagnostics in the EPROM. If I remember you
get a random generated graphic screen.

>
> Owen A

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