Re: Apple ][+ gravely ill - seeking assistance :(

[stockhunt8 <stockhunt8@gmail.com>]

On Jun 1, 11:01 am, Alex Freed <al...@mirrow.com> wrote:
> N.N. Thayer wrote:
> > FIXED.  (As far as I can tell.)
>
> > Since I couldn't even reset, I replaced the F8 ROM with one from a
> > Language Card I had sitting around, and presto!
>
> Interesting. AFAIK those were mask ROMS, not EPROMS. Aren't they
> supposed to last forever?
>
> Back in the early 80's the UV erasable EPROMS were supposed to retain
> the data for "about 10 years". Didn't bother me at the time as computer
> years are like dog years :) I don't think I ever kept a PC for over a
> few years, so who cares? I didn't think at the time that the longevity
> of an Apple 2 would interest me well into the next century...
>
> But seriously, why do mask-programmed PROMS fail so often?
>
> -Alex.

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