16 Oct
2015
16 Oct
'15
11:17 a.m.
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 <unclefalter at 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