Applix 1617 programmable logic

SPAL16L8 (IC24)

      SPAL
IC26 pin 8 --> 1 PAL
 16L8 
20 VCC  
IC25 pin 8 --> 2 19 --> SD7
A7 --> 3 18 --> EXTDTACK
A6 --> 4 17 --> SRWDAT
A3 --> 5 16 <-- STXRDY
A2 --> 6 15 <- SRXRDY
A1 --> 7 14 --> SRDDAT
R/W --> 8 13 --> SINT2
LDS --> 9 12 --> SCLRINT
  GND 10 11 <-- ZCOMMAND