74S287 

1024-bit programmable read-only memories
256 4-bit words
3-state outputs
This product has been superceded by the TBP24S10

func pin           pin func
        +---__---+
AD G  1 +        + 16  Vcc 
AD F  2 +        + 15  AD H
AD E  3 +        + 14  *S2
AD D  4 +        + 13  *S1
AD A  5 +        + 12  DO1
AD B  6 +        + 11  DO2
AD C  7 +        + 10  DO3
 GND  8 +        +  9  DO4
        +--------+ 
*) means active low.

reader
bit    addr   data
0       A     DO 1
1       B     DO 2
2       C     DO 3
3       D     DO 4
4       E
5       F
6       G
7       H