I figured out what my problem was. The Jade NOS backplane I was using was not completely S100 standard compliant. Pin 3 (XRDY) is tied to ground on this backplane, pulling wait low and locking up the cpu.
I cut a few traces, and the problem is solved. I guess you really have to be aware that some of the older stuff may not adhere to the standard. Ed On Saturday, August 9, 2014 12:54:36 PM UTC-5, Edward Snider wrote: > > Hello all, > > I am in the process of trying to get my Z80 cpu card running, and I've > noticed that > there are definitely 2 different pcbs marked "Z80 CPU BOARD VERSION 02", > I have them both in front of me. > > The one I built does not have a JP10 or K3 jumpers. Is this actually a V1 > board then? > I'm trying to figure out which schematics I should be looking at. > > Anyone know of any other differences, jumper settings, issues, etc, I > should be aware of > with this board? So far I'm just trying to get the cpu into halt with an > eprom full of 76's > and not having any luck. Probably don't understand the jumper settings > well enough. > > > Thanks, > > Ed > -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
