Radio Shack TRS-80 Model 100 Basic Manual page 107

Experiment #2
Printing Text Anywhere On The LCD
The
PRINT
@ (PRINT AT) statement allows printing of text in any of 320 positions
on the display. These positions correspond to eight 40 character lines as illustrated in
the table below:
Columns
1 2 3
4 ... .... 39 40
Line 1 0
1 2 3 .... ·
..
38 39
Line 2 40 41 42 43 ....
· ..
78 79
Line 3
80
81 82 83 ....
· .. 118
119
Line 8 280 281 282 283 ....
· .. 318
319
Table 8-1. of PRINT
@
positions
Clear the display and print the name "RADIO SHACK" in the center of the display
by entering:
CLS
(ENTER)
PRINT @ 135, "RADIO SHACK"
(ENTER)
You should see:
Ok
PRINT
@
135,
IIRADIO SHACK II
RADIO SHACK
Ok
•
Note that the name "RADIO SHACK" begins printing in the 15th column of line 4.
The PRINT@ position would be computed as:
40
*
(4 -
1)
+
15
=
135.
In general, to print in line L and column C, use PRINT@ position
40
*
(L - 1)
+
C
101