[Techtoolslist] Fluke & Midway 8080 boards...

[Andrew Welburn]

John, there is no trick to Fluking 8080 Pcbs, they work as normal, no fudging necessary. I use a 9100 however, ymmv.

Are you perhaps using a device that isn't strapped properly on the myriad of jumpers? I think I may have seen what you describe happen before, and it was due to something like having a 2716 EPROM in, but the Pcb was strapped for 9316 roms..

Andrew Welburn (mobile)
www.andys-arcade.com

> On 26 Jun 2014, at 21:42, John Robertson <jrr at flippers.com> wrote:
> 
> Anyone remember what is needed to get valid memory reads on the 8080 boards? I seem to recall one has to set  the gates to a state prior to doing a ROM test, but can't recall the process...perhaps someone has a script they can share?
> 
> At the moment the RAM test works fine, however any ROM space that has FF in it - on the high memory area (FFXh) gets random garbage inserted from the injection of some clock info on the data buss. The valid data locations in the ROM dont' appear to be affected. Tried adding a pullup resistor bank, no change. No ROMs, no change...
> 
> Thanks!
> 
> John :-#)#
> 
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