Tom StepletonApr 11
POV: #PERQ hardware debugging, as usual. The #Z80 (serving as an I/O coprocessor) is behaving strangely: fetching instruction bytes without toggling the M1 pin, jumping to random locations at around 47uS after coming out of reset; what's going on here?
Show threadSkeezics BoondoggleApr 11
@stepleton Hardcopy of the schematics and code listing, *spiral bound*? 🔥
Show threadTom Stepleton
@skeezicsb yes of course 😎
For all the fixes I've had to put in to the EIO board, I wish I'd had it printed much sooner...
Apr 11 at 7:39pmWeb
Show threadTom StepletonApr 11

@skeezicsb It's also a testament to how terribly slow Firefox PDF rendering is...

Even reading the schematics with Acrobat on the Pentium-powered logic analyser is a lot faster!