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APPENDIX A:
SPECIFIC PRINTERS
A.I Daisy Wheel and Similar Printers
Features:
All printers described in this section support all of Word
Processing's print enhancements and other features, except as noted in
individual descriptions below.
All printers described here will print
bidirectionally', "formed" text will be printed with Justification.
Choice of Typewheels:
The interchangeable typewheels for daisy printers
come in many choices of characters and character arrangements. The printed
characters will match those seen on the screen during editing only if the
typewheel in use contains the standard ASCII characters in the standard ASCII
order. Some typewheels have other character graphics; many have a different
character arrangement so that, for example, a period in the document will
print as some other character. Some compatible typewheels for each printer
are listed below.
A.I.I
OEM Daisy Wheel and Similar Printers
Word
Processing can drive
the following
"OEM
(Original
Equipment
Manufacturer) daisy wheel and similar printer models.
Diablo Hy-Type II 1300 Series
Qume Sprint 3 (with cable adapter)
Nec Spinwriter 5500
The OEM printers provide simple installation and unexcelled performance with
Word Processing and are generally the least expensive to buy; their chief
disadvantage is that they are more difficult to drive from other software than
other types of printers.
The above printers have a 24-bit parallel interface using a very different
command structure from that of all other printers supported by Word
Processing. One installation selection specifies any of these printers, selects
the OEM printers driver in Word Processing, and specifies the "I/O Master"
interface board. When installed for an OEM printer, Word Processing accesses
the printer interface directly.
No operating system routines are used, and
many installation complications are thus avoided.
A "printer busy test" is
provided, resulting in good response when editing and printing simultaneously.
Interfacing: For any of the OEM printers listed above, use an interface board
with the OEM printer ports addressed at F8 though FA hex.
Connect the
interface board to the printer with a cable (using an adapter as noted below
with the Qume Sprint 3).
An IMSAI Pio-4 board addressed at ports F8 though FB may be used; the cable
required is the same as the cable previously supplied by IMSAI, plus an
additional conductor bringing the printer's "data 1/2" bit to bit 4 or port F9.
REFERENCE
13-28
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