[sdiy] Prophet 5 Rev 3

Michael E Caloroso mec.forumreader at gmail.com
Sun Nov 30 06:54:37 CET 2014


I have read that shorting all the pins on static RAMs like 6508s will
restore them.  Haven't tried it but...

MC

On 11/29/14, John Henson <synthnerd at eircom.net> wrote:
> Hi All,
> I have two Rev3 P5's in for rebuilds at the moment and my problem is
> this. One of them definitely has problems with faulty RAM (6508's) and
> the other may have. The ideal solution would be to use 2716 EPROM's in
> two of the available sockets and to use a 6116 in the third socket to
> replace the 6508's (with some necessary rewiring of address and read
> write and enable lines). This would also allow the removal of two now
> unnecessary regulators from the power supply. That's all great but does
> anyone have the Binaries for the 8.1C firmware so that I could program
> either 2716 or 2732 EPROMs. I can't read 2708's with my hardware.
> Regards,
> John.
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