Atari 400 Technical Reference Manual page 530

Mixing Graphics Modes, cont.
II. PROCEDURE TO SET UP SCREEN IN MIXED MODES, cont.:
10. POKE the JUMP instruction followed by the LO byte, then the
HI byte into the Display List. The offset for the JUMP
POKE is the last mode line #
+
1, for LO byte it is
+
2,
for HI byte it is
+
3.
example: (last mode line # was 64)
REMARK
JUMP
LO BYTE
HI BYTE
POKE INSTRUCTION
POKE START
+
65,65
POKE START
+
66, PEEK(560)
POKE START
+
67, PEEK(561)
III. PROCEDURE TO PRINT AND PLOT IN MIXED MODES
1. If the mode line #'s of a mode on the screen fall within
the range of that mode's normal mode line #'s then use the
following procedure:
a. POKE 87 with the mode #
b. Determine the Y coordinate by counting the # of mode
lines from the top of the screen to the current
position.
c. Determine the X position in the normal manner for that
mode.
d. Depending on the mode, either PLOT and DRAWTO, or
POSITION and PRINT.
e. These steps must be done for each mode on the screen
that meets the condition in step 1.
example: MODE 1 POKE 87,1
POSITION 2,I:PRINT #6;"TEXT"
MODE 7 POKE 87,7
COLOR l:PLOT 20,20:DRAWTO 30,30
MODE 2 See step 2
B
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