Laser 128 - 0- 40-Column Display; Parallel;Serial Printer

Port number
0
2
3
4
5
6
7
INPUT/OUTPUT PORTS
1/0 device or interface
Built - in 40-column display
Parallel/Serial printer
interface
Serial communication
interface
Built-in 80- column display
Mouse interface
I Mcgbyte expansion RAM
interface
Built-in 5.25" disk drive
interface
3.5" disk drive interface
Table 6-1
1/ 0 port assignment
6.1.1 Port 0 - 40-column display
The 40-column text display capability of the
computer has already been described in
section 5.2.l.l. To . enter 40-column text mode
in BASIC, type the following s tatement:
]PR#O<CR>
When the computer is in 40-column text
mode (indicated by a flashing checker-board
cursor), the following control-characters will
be recognized as special commands :
CTRL-G:
"Beeps" the speaker.
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