Atari XL

Advanced Graphics
rO-l-o-r-o,--OTo--ro-l-o-r--,
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- -- .._- --- --- -- _. _.. _. -.-._- ---
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165
2 'EXTRA' SCAN
LINES
The Character p as Displayed in Mode 0.5
and will insert two blank scan lines before the
character is displayed.
You will need to use the previous program as a
subroutine to set up the display list in any program
you write to use this mode.
MIXING MODES
With more programming, it is possible to mIX
several graphics modes in the screen at once. You
have seen examples of such mixed modes when a
mode 0 text window is displayed at the foot of a
graphics display, and also in the displays used in
self-test mode.
As an introduction, let's examine the display list of
a mode 2
screen, using the following program.
10 DIM LST(25)
20 GRAPHICS 2
30 DL=PEEK(560)+256*PEEK(561)
40 FOR Z=O TO 23
50 LST(Z)=PEEK(DL+Z)
60 NEXT Z