16 Oct
2015
16 Oct
'15
11:06 a.m.
The Heathkit ET-3400 (another SBC trainer) also used the M6800 CPU. Now I
realize that the two machines probably have fairly different ROMs, but
otherwise some of the 3400 materials / programs should cross-over to the
u68. It might even simply be a matter of translating ROM calls..
Anyway, I have a full set of docs for the ET-3400. If you're interested, I
can find a way to get a copy to you.
-Bill
On Fri, Oct 16, 2015 at 11:16 AM, 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