MBL8259A-2 controller equivalent, nmos programmable interrupt controller.
TABLE 1 - PIN DESCRIPTION
Symbl
Pin No. Type
Vee
28
I
GND
14
I
CS
1
I
WR
2
0
RD
3
I
D 7 - Do
4-11
I/O
CASo-CAS2 12,13,15 I/O
SP/EN INT
16
I/O
17
0
IRo-IR7
18-25
I
INTA Ao
26
I
27
I
Name and Function
Supply: +5V Supp.
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