Apple IIe - Page 110

110 Apple lie Users Handbook
•
Applesoft
HIMEM
• Integer
The HIMEM statement defines the address of the highest
memory location available to a BASIC program .
Configuration
HIMEM: number
number
is a numeri c constant or numeric expression_: The value
of number should indicate the highest available memory address.
Th
.i s value must lie between -65535 to 65535 (-32767 to 32767 in
Integer BASIC).
The
current value of HIMEM can be displayed by entering :
PRINT
PEEK (116) *256 +PEEK (115) for Applesoft
PRINT PEEK (77) *256 +PEEK (76) for Integer BASIC
If the HIMEM : is set lower than LOMEM or set so low that there is
not enough room for the program to run , an out of memory
error will occur.
HIMEM can only be used in the immediate mode in Integer
BASIC.
The value of HIMEM is not changed by the commands NEW,
CLEAR, RUN, and
DEL.
The HIMEM statement is generally used to reserve memory for a
machine language subroutine called by the BASIC program. The
HIMEM statement keeps BASIC variable and array storage
separate
from the machine langua~ subrout i ne .