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memory board.

1. Saturn 32K and standard 16K RAM boards:

The following procedure is used for attaching blocks of

memory on a Saturn 32K board, or a 16K RAM card.

To attach a single block to RAMEXPAND, the chosen block and

slot number containing the memory card are stipulated as follows:

a) A block selection parameter is calculated by adding the

slot # of the memory card to the block designation # (given

in section I.D.l). For example, the block selection para-

meter of the first 12K block of a Saturn 32K RAM board in

slot 2 is 2 [slot #3 + 8 [block designation #] = 10.

b) This block selection parameter is supplied as the second

parameter in CM$ when the connect function (#9) is executed.

Thus in above example, CM$ = “9,lO,A,O,O” where A= error

status variable.

Additional calls to RAMEXPAND may be used to connect other

blocks of memory as desired. More than one block within a given

memory card can be attached with a single call to RAMEXPAND, by

merely adding the corresponding block numbers along with the

slot# to generate the block selection parameter. Thus, to

specify the first and second 12K block of a Saturn 32K board in

slot #2, the block selection parameter is:

2 + 8 + 16 = 26

| | | |

slot# 12K 12K block

block block selection

parameter

and CM$ = “9,26,A,0,0”.

2. Saturn 64K and 128K RAM boards:

The following procedure is used for attaching blocks of

memory on a Saturn 64k or 128K RAM board to RAMEXPAND.

To attach a single block to RAMEXPAND, the chosen block and

slot number containing the memory card are stipulated as follows:

a) A block selection parameter is calculated by adding the

slot # +128 to the block designation # and the “32K section”

designation given in I.D.2. Thus, for example, the block

selection parameter of the 1st 12K block of a Saturn 64K

(or 128K) board in slot 2 is calculated:

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Apple Logic Board Technical Information Seite 33