9 Jul
2013
9 Jul
'13
11:40 a.m.
At 05:13 PM 7/8/2013, you wrote:
Not the same thing, but more years ago than I care to remember, I
modifed a M1 to take 4164 RAMs and have 48K on the CPU board. I also
'obtained' a dump of thr M3 ROM, burned it into EPROM and fitted that to
the M1. It worked. Of coruse I didn;t have any of the M3 features, in
fact even thigns like the bilinking cursor didn't as there's no clock
interrupt in an M1.
My intention at the time was to wire-wrap the extra bits, including a
disk controller and a serial port. One thing stopped me from doing that.
I want to a radio rally (Hamfest) to see if I could find any useful bits
(like PCBs with WD disk cotnrolelr chips, flippy drives, etc). And I
bought a complete M3. Oh well...
I still have the hacked M1 somewhere...
-tony
I am curious about the "Model 3 in a Model I
case." I've never
heard of this
transplant. Was it a commercial kit, a common
hack or a one-off
feat? Was any
additional hardware needed to make it work?
jht,
Yes it was a comercial kit from back in the day. It has everthing on
one circuit board the size of the Mod I's cpu board. As far a
hacking, you only had to cut
some of the plastic vains off to allow access for some of the
cables. You used the
Model I's monitor for the display.