IC44 green spot (sheet 2)
74S288 32 x 8-bit

+----- E, 14, *RD
|+---- D, 13, A0
||+--- C, 12, (NOR(*WR, S8))
|||+-- B, 11, beta (blue PROM, ic46-2)
||||+- A, 10, alpha (blue PROM, ic46-1)
|||||
|||||  +--------- D8, 9, (to stack interrupt)
|||||  |+-------- D7, 7, *WA (RAM write)
|||||  ||+------- D6, 6, *WB (RAM write)
|||||  |||+------ D5, 5, *WC (RAM write)
|||||  ||||+----- D4, 4, *OCA
|||||  |||||+---- D3, 3, *OCB
|||||  ||||||+--- D2, 2, *OCC
|||||  |||||||+-- D1, 1, (NORed with *MB5 makes MB5 A/B)
00000: 01111111 
00001: 11111111 
00010: 01111010 
00011: 01111101 
00100: 01111111 
00101: 11111111 
00110: 01111110 
00111: 01111111 
01000: 01111111 
01001: 11111111 
01010: 01110110 
01011: 01111100 
01100: 01111111 
01101: 11111111 
01110: 01111110 
01111: 01111110 
10000: 01111111 
10001: 11111111 
10010: 01111110 
10011: 01111111 
10100: 01111111 
10101: 11111111 
10110: 01011110 
10111: 01101111 
11000: 01111111 
11001: 11111111 
11010: 01111110 
11011: 01111110 
11100: 01111111 
11101: 11111111 
11110: 00111110 
11111: 01101110