Hi Brad, I have a MEK6800 so not quite the same board but I know a little bit about 6800s ... I would suggest referring back to the original publications from Mot ... there is a M6800 Applications Manual and a M6800 Programming Manual ... those are canonical and you should be able to find both on Bitsavers ... a nice "third party" book is "The 6800 Microprocessor" by Jack Quinn on Merrill press ... you should be able to find a copy cheap ... few bucks.
Once you get into it a little bit, I think you'll find they're pretty friendly to interface and program ... I/O is all memory-mapped ... and you will appreciate having that extra accumulator and the 16-bit index register handy if you're used to playing with the 6502 ... :O Best, Sean On Fri, Oct 16, 2015 at 12:16 PM, Brad <unclefal...@yahoo.ca> wrote: > Hey guys, > > > > Posting this to various forums in the hopes of finding someone in the know > - > I have this ASCI u68 system (6800 cpu) that I understand was used in > educational environments. I kind of have it running but know little about > assembly language programming, etc. Or the unit itself. Have any of you > ever messed with these? It looks like it has a serial connector on its > mainboard.. was trying to figure out a way if I could patch it to one of my > terminals. > > > > Also trying to find some simple 6800 assembly programs/routines to test it > and see if it really works properly. There is an MC6821S chip on it (there > are three of them actually) and one in the middle is marked 'BAD'. I > understand those handle peripherals. > > > > I'd also heard rumours there was a second board available for these that > gave them BASIC. I've never seen such a board for sale anywhere - wondered > if anyone had seen one in the wild. > > > > Brad > > > > > >
