32K PRAM BOARD, 562-305
The 32K PRAM memory board has three switch packages. Switch package Sl is used to set the board number
and address range. Switch packages S2 and S3 are used to select RAM or PROM memory chips.
Before setting the switches, let’s look at a PROM label. PROMS are located in IC sockets 9 through 24. The first
‘line of information on the label is the program number. The second line tells what card this is and what IC socket
this chip goes into. The third line is the date the chip was programmed. For example,
H901102C
cl
PROGRAM NUMBER
CARD2lC9
PRAM BOARD 2 AND THIS CHIP GOES INTO IC SOCKET 9
3-l 5-83
THIS CHIP WAS PROGRAMMED ON MARCH 15,1983
To set the switches on switch package Sl , use the illustration above and Table B.
To set the switches on switch packages S2 and S3 you must first determine the status of IC sockets 9 through
24. Each of these will either be occupied by a RAM or PROM chip, or will be empty. Use the illustration above
and Table C to set the switches.
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