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Chapter 5
The Saki flowed like melting snow from Mt. Fuji when they contrived that wild
scheme. Let's see if we can wring it out.
Suppose we want to shoot 100 columns of graphics to the printer, on one row.
What numbers would we use for N1 and N2?
CHR$ (l00) CHR$ (0)
Ok, so we got lucky.
How about 300 columns? Well, 300-256=44. Let's try:
CHR$ (44) CHR$ (1)
Since N2 = CHR$ (1), 256 is added to N1. 44 + 256 = 300.
Not really so bad. Pass the Saki!
Enter these lines, but don't RUN:
9 PR #1
10 PRINT CHR$ (27) "K" CHR$ (50) CHR$ (0);
TRS-80 Model I use:
10 LPRINT CHR$ (27) "K" CHR$ (50) CHR$ (2) ;
The Model I can't send CHR$ (0) reliably, and ANY EVEN number is inter-
preted as a zero in the ESC K sequence here in Graphtrax II.
How many columns is line 10 reserving, 50 or 306?
Answer=50. Don't RUN yet.
Firing the Pins
There are 9 pins in the MX-70 print head. In graphics mode, we have control of
the top 8 (the middle 7 for 7 bit computers).
42
for 100 columns
(Apple)
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