[Coco] RE: [Color Computer] Building an embedded OS9 system from CoCo OS9
KnudsenMJ at aol.com
KnudsenMJ at aol.com
Wed Jun 23 23:11:41 EDT 2004
In a message dated 6/23/04 2:15:57 PM Eastern Daylight Time,
lamune at doki-doki.net writes:
> I have a ton of 68xx chips that I've been meaning to do something with. Sure
> PICs are great, but I already have these and I want to use them!
One place that tons of 68xx chips are still used, especially 8-bit
peripherals and 680x CPUs, is in pinball machines. Since 1978 pinballs have used
microprocessors in place of the older relays and stepping switches. Lots of
> I already have experience with OS/9. I have the CoCo versions of the
> software... it seems logical that if I build a little single board computer
> that's very similar to the CoCo I've already got a working, debugged,
> realtime OS I can run without having to write something myself. Heck I've
> even got BASIC09!
Yep, you could debug a BASIC09 program, compact it into I-code, and burn it
into an EPROM as an OS-9 Module and have it execute -- no need to write
everything in assembly or C. Of course your ROMs would have to include RUNB. I
believe this was all quite standard procedure in OS9's heyday.
> I picture using these boards for rather mundane purposes; data collectors,
> process controllers, Nixie clocks, stuff like that. Nothing practical, just
I'd like to build such things for MIDI organ controllers, MIDI merge boxes,
etc. If I still had my ROM-blowing equipment (well I do, but no manual!) I'd
probably be doing stuff like that right now.
> Whatever I build though will not likely have any sort of floppy controller
If you can re-blow ROMs easily enough and just pop them in and out of a
socket, no need for a floppy. Of course, sometimes it's cool to have a serial port
and some code that will let you download new code into the beast and run it.
I used to do all that stuff at Bell Labs. In later years we, uh, outgrew
that sort of technology. NOW I know why I lost interest in my job ... Mike K.
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