Atari 400 - Page 308

306 User 's Handbook to the Atari 400/ 800 Computers
Appendix E. Atari PEEK and POKE Locations
This appendix lists me mory addresses that BASIC programmers
may wish to access via the PEEK or POKE statements.
In BASIC, memory addresses as well as the contents at those
addresses are given in decimal
notation. Each address contains a
value
between 0 and 255.
Two consecutive addresses are required to store numbers
greater than 256. I n these instances, the val ue of the fi rst add ress
plus the va lue of the second address multiplied by 256will result
in the total va lu e. For example, PEEK (97) + 256 * PEEK (98) will
return the ending graphics cursor co lumn.
Most Atari me mory locations are referred to by name as well as
by decimal memory address. Both are given in Appendix E.
Decimal
Address
Name Description
Memory Addresses
14 , 15 APPMH I
These addresses
contain
the highest address that can
be used
for program lines
and variables.
88,89
SAVMSC
These
addresses
contain
the lowest screen memory
address. The contents of
that address wi ll be dis-
played in the screen's
upper
right -hand corner.
128 , 129
LOMEM
The
BASIC low memory
pointer.
144,145 MEMTOP
The BASIC top of memory
pointer.