[vcf-midatlantic] Mystery 1702A(?) EPROM Programmer

Jonathan Chapman lists at glitchwrks.com
Mon Nov 1 23:18:57 UTC 2021


Reformed the big capacitors, tested the power supply, replaced all electrolytics on the control board (two were leaking) with hermetically sealed axial tantalums, and powered up on the variac today. Seems to be largely working at least for reads!

Thanks,
Jonathan

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On Saturday, October 30th, 2021 at 16:25, Jonathan Chapman via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org> wrote:

> Bill,
>
> I haven't brought the power supply up yet, but it's got your typical crazy high 1702A voltages.
>
> I pulled the control board and have been going through it, it looks to have a fair bit of similarity to the Intel MP7-03 1702A programming card for the MCS-4/MCS-8 families.
>
> Thanks,
>
> Jonathan
>
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>
> On Saturday, October 30th, 2021 at 15:32, Bill Degnan billdegnan at gmail.com wrote:
>
> > I assume you have already thought to/started checking the voltages to the pins as this would tell you if it's for the 1702, 2708, or newer 27xx family proms.
> >
> > On Sat, Oct 30, 2021 at 1:11 PM Jonathan Chapman via vcf-midatlantic vcf-midatlantic at lists.vcfed.org wrote:
> >
> > > Does anyone recognize this EPROM programmer:
> > >
> > > https://imgur.com/a/GcmefTl
> > >
> > > It appears to be for 1702A EPROMs. Working on cleaning it up and figuring it out!
> > >
> > > Thanks,
> > >
> > > Jonathan


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