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Custom Subroutines Printer Driver:
Choosing this printer driver selection
causes Word Processing to call user-codes, user-installed subroutines to output
to the printer, input from the printer (for communications protocols), and
determine whether' the printer is busy.
This choice may be used when the
CP/M list device won't work (e.g. because a communications protocol, and thus
printer character input, is required) and the port driver won't work (e.g.
because an unusual printer uses several data or status ports).
820-11 Word
Processing is installed in this format for the Xerox 20 cps or 40 cps Printer.
After selecting "Custom Subroutines" during the INSTALL program, it is up to
the user to code and install the necessary routines.
13.2.4
Recap of Printer-Related Installation Selections
OEM Printer
None of the complications discussed in this section are
pertinent.
Choose
"I/o
Master / OEM Printer" at the INSTALL program's
printer menu (as will be described in Section 13.4.4). INSTALL will present no
further printer-related selections.
Teletype-like (non-daisy) Printer: If your operating system can already drive
the printer, specify "Teletype-like" at the printer choice menu, specify "None"
for communications protocol, and specify "CP/M list output device" for printer
driver. Alternately, you may wish to use the port driver for better keyboard
response during concurrent editing and printing.
(Serial) Dais Wheel or Similar Printer Interfaced at 300 Baud {30 characters
per second or Less: If your operating system can already drive the printer,
choose the specific printer type at the printer menu, specify "None" for
communications protocol, and specify "CP/M list output device" for printer
driver. Or use the port driver if desired, for better keyboard response during
concurrent editing and printing. You will want to change your printer to 1200
baud as soon as possible so Word Processing will print faster.
(Serial) Daisy Wheel or Similar Printer Interfaced at 1200 Baud (120 characters
per second): You will need to use a communications protocol and a driver that
can input as well as output characters. See Appendix A: Specific Printers for
specific discussion of your printer. Specify the particular printer type at the
printer menu.
Specify Xon/Xoff ETX/ ACK protocol, and set the printer to
match, unless unusual considerations dictate using a different protocol.
For printer driver, we suggest using the port driver. However, you may wish
to consider using the TTY: or CRT: alternate console driver. The CP/M list
output device printer driver cannot be used with a communications protocol
unless you patch in your own Printer Character Input routine.
Exception: If your 1200 baud printer is a NEC Spinwriter 5510/5520, you may
be able to use a special cable instead of using a communications protocol (see
Appendix A: Specific Printers). If you use the special cable, you may specify
"None" for protocol and "List output device" or "Port driver" for printer
driver.
REFERENCE
13-7
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