Apple Logic Board Información técnica descargar pdf (Pagina 34)

2 [slot #] + 128 [to indicate that this is a 54K or 128K

board] + 8 F 12K block designation #1 + 256 [ 1st “32K

section” designation #] = 394.

b) This block selection parameter is supplied as the second

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

executed. Thus in the above example, CM$ “9,394,A,0,0”,

where A = error status variable

Additional calls to RAMEXPAND (function #9) may be used to

connect other blocks of memory as desired. More than one block

within in a given memory card can be attached with a single call

to RAMEXPAND, by adding the corresponding block numbers, “32K

section” designation numbers along with the slot # +l28 to

generate the block selection parameter. Thus, to specify the

first and second 12K blocks of a Saturn 128K RAM board in slot

#2, the block selection parameter is:

2 + 128 + 8 + 16 + 256 = 410

| | | | |

slot# 12K 12K 1st block

block block 32K selection

section parameter

and CM$ + “9,410,A,0,0”

As a second example, to specify the first four 12K blocks of

a Saturn 128K board in slot #2, the block selection parameter is:

2 + 128 + 8 + 16 + 256 + 512 = 922

| | | | | |

slot# 12K 12K 1st 2nd block

block block 32k 32K selection

section section parameter

and CM$ = “9,922,A,0,0”

When the connect function (#9) is executed, these blocks

will be attached to RAMEXPAND. Additional connect function calls

to RAMEXPAND should be executed for each expansion memory board

to be used by RAMEXPAND. Some of the more common block selection

parameter values are given in section VIII, under the subsection

describing the “connect” function (#9) syntax.

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Apple Logic Board Información técnica Pagina 34