P3 = 74LS32
P4 = 74LS373
P5 = 6116 RAM(2k*8 static RAM)
P6 = 2003
P7 = 8039H CPU(MCS-48 family of 8-bit microcontrollers, on-chip oscillator, 2 8-bit timers, 27 i/o ports and 128 bytes of RAM. Requires external ROM to operate)
P8 = 2732 ROM (8DE-1)
P9 = 7404
P10 = 74LS74
P11 = Intel 8243(MCS-48 INPUT/OUTPUT EXPANDER) P12 = 2732 EPROM (32k -4kb*8) (NOT FITTED)
SW1 dipswitch (accessible on outside)
two fuses