Apple Logic Board Technical Information PDF herunterladen (Seite 40)

VII. SUMMARY OF AVAILABLE FUNCTIONS

RAMEXPAND provides the following functions (specified as the

first value in the command string)

0 — no operation

1 — store complete program in extended RAM

2 — fetch and run program from RAM

3 — store subroutine or program segment in extended RAM

4 — fetch subroutine or program segment from extended RAM

5 — store contents of an array in extended RAM

6 — fetch contents of an array from extended RAM

7 — exchange contents of an array between normal RAM and

extended RAM

8 — delete extended RAM segment (makes space available again)

9 — connect new block of extended RAM to enable RAMEXPAND to

use it.

10 — disconnect block of extended RAM to prevent RAMEXPAND

from using it.

11 — fetch total amount of free space in extended RAM

12 — fetch name of “next” segment

13 — (not implemented yet) preload BASIC program from disk file

into extended RAM

14 — initialize RAMEXPAND

15 — store contents of Applesoft string array in extended

RAM

16 — fetch contents of Applesoft string array from extended

RAM

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Apple Logic Board Technical Information Seite 40