pin  name  description           direction
------------------------------------------
 0   Vcc     5 V                   output
 1   Vcc     5 V                   output
 2   M1    machine cycle 1         output
 3   MREQ  memory request          output
 4   IORQ  IO request              output
 5   IORES IO reset                output 
 6   WAIT  wait cycle request       input
 7   INT   interrupt request        input
 8   WR    write data              output
 9   RD    read data               output
10   BNK1  bank select pin         output
11   BNK0  bank select pin         output
12   ROM2  ROM 2 enabled?          output
13   RAM2  RAM 2 enabled?          output
14   D7    data pin                in/out
15   D6    data pin                in/out
16   D5    data pin                in/out
17   D4    data pin                in/out
18   D3    data pin                in/out
19   D3    data pin                in/out
20   D1    data pin                in/out
21   D0    data pin                in/out
22   A15   address pin             output
23   A14   address pin             output
24   A13   address pin             output
25   A12   address pin             output
26   A11   address pin             output
27   A10   address pin             output
28   A9    address pin             output
29   A8    address pin             output
30   A7    address pin             output
31   A6    address pin             output
32   A5    address pin             output
33   A4    address pin             output
34   A3    address pin             output
35   A2    address pin             output
36   A1    address pin             output
37   A0    address pin             output
38   GND   ground                  output
39   GND   ground                  output