2 Fire 1 10 Fire 1
3 X1 11 X2
4 COM1 (switches) 12 COM2 (switches)
5 +5V 13 Y2
6 Y1 14 Fire 2
33 *WR 34 *HALT
35 *INT 36 *NMI
37 *BUSRQ 38 *BUSAK39 READY 40 *BRST41 *RSET 42 *ROMEN43 ROMDIS 44 *RAMRD45 RAMDIS 46 CURSOR
47 LPEN 48 *EXP
49 GND 50 CLK4</pre>