4500
Industrial Control Unit.
If you _really_ want to use this RRRRISC, try to get the 'MC14500B Industrial
Control Unit Handbook' from Motorola (sorry, no ISBN number).

    +----------+
RST |1  +--+ 16| VCC
 WR |2       15| RR
  D |3       14| X0
 I3 |4       13| X1
 I2 |5  4500 12| JMP
 I1 |6       11| RTN
 I0 |7       10| FLG0
GND |8        9| FLGF
    +----------+

[This information is part of the GIICM]