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may be connected to Port #l) to the code stream sent to the video screen. PR#0
“unhooks” Port #I from the video signal chain by sending ALL printing only
to the screen.
Most other BASICS use a special word such as LPRINT to send codes directly
(and exclusively) to the printer. A separate PRINT statement must be used to
send codes exclusively to the video screen.
A few computers even have a dual command that allows use of just PRINT,
but everything that goes to the screen also goes to the printer port. The
computer you use determines which scheme you select.
If you’re not using an Apple, peel and slice the Apple programs in this manual
as needed. If you know your own computer, it should be easy. If this causes
gastric acidity, I respectfully suggest referring to a copy of the second edition of
The BASIC Handbook, by your humble servant.
If you are using an Apple computer, continue straight ahead. If it’s a TRS-80,
System 80, PMC-80, or any other machine using a similar Microsoft-type
BASIC, GOSUB immediately to Appendix D. Atari users GOSUB to Appendix
E.
If it’s any other computer that requires a special interface to drive a parallel
printer, GOSUB to any instructions that might come with that special inter-
face kit.
Non-Apple users should ignore the few sections that are clearly written for the
Apple, like the following paragraph, unless of course you want to learn some-
thing about another computer - which isn’t a bad idea.
The Apple Stem
Apple users verify that the power is OFF, then place the Epson Parallel
Interface card in slot 1 (not 0) of the computer’s mother board. Connect the
printer cable as shown in Figure 2-l.
Figure 2-1
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