[vcf-midatlantic] Good source for eproms?

Jason Perkins perkins.jason at gmail.com
Wed May 25 07:14:16 EDT 2016

The EPROM on the drive now doesn't have a window. I thought that means
it's only one time programmable?

Dave, I'll drop you a line off-list. Thanks for the offer!


On Tue, May 24, 2016 at 11:54 PM, Dave McGuire via vcf-midatlantic
<vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
>   Yes.  The problem with EPROMs forgetting their contents is charge
> leakage from the floating gates, not chip failure.
>   I have a metric assload of EPROMs (literally thousands) of nearly
> every type, especially the really common ones like 2764s, if anyone
> needs them.
>               -Dave
> On 05/24/2016 11:52 PM, Ian Primus via vcf-midatlantic wrote:
>> Even if an EPROM has gotten corrupted, the chip itself should still be
>> fine. Just erase and reprogram. I've yet to have a problem with doing
>> this, it's quite rare to have a dead EPROM.
>> Almost every EPROM I have has been scavenged from some sort of junk
>> board or another. 2764's and 2732's are quite common, should not be
>> hard to find.
>> -Ian
>> On Tue, May 24, 2016 at 11:22 PM, Jason Perkins via vcf-midatlantic
>> <vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
>>> I'm trying to get a Plus HardCard going again. Like many the ROM has
>>> forgotten some of its bits so I want to try installing a freshly
>>> flashed one.
>>> What's a good source for 7264s? Is it worth trying to get used ones on
>>> eBay? While I'm at it I'd like to track down a 2732 for an Apple
>>> ProFile formatting rom.
>>> Thanks,
>>> --
>>> Jason Perkins
> --
> Dave McGuire, AK4HZ
> New Kensington, PA

Jason Perkins
313 355 0085

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