Atari 400 - Page 309

741,742 MEMTOP
743,744 MEMLO
Appendix E. 307
The highest address in the
free memory address will
be returned by PEEK (741) +
PEEK (742) * 256 - 1.
These
locations contain the
lowest address in the free
memory area.
Screen Addresses
82 LMARGIN This address gives the col-
umn position of the left
margin in graphics 0 mode.
The default value is O.
83 RMARG/N This address gives the col-
umn position of the right
margi n of the screen in
graphics 0 mode . The de-
fault value is 39.
84 ROWCRS This address gives the cur-
rent row position.
85,86 COLCRS This address gives the cur-
rent column position.
87 D/NDEX This address gives the cur-
rent screen mode.
90 OLDROW This address specifies the
starting graphics cursor row
for DRAWTO and X/018
statements.
91,92
OLDCOL
This address gives the be-
ginning graphics cursor
column for DRAWTO and
XIO 18 statements.