pieces of metal and plastic - test-drb@ccmp.vtda.org

27 Jun 1997

...
  Of course if you were a real hacker you had an M-code
box that let you
 write the native 10 bit (?) instructions for the 41's CPU (I forget what
 it's called). 
I got more into the guts of the HP-71, which was a 20-bit, nybble-oriented.
It had a Saturn chip (I think), on which I programmed in FORTH. A FORTH
chip was talked about for the HP-41 (never heard it called a coco, though)
but I don't know if it jelled.