Texas Instruments 880 User Manual page 89

Appendix E
Options and Accessories
E.1 OPTIONAL CHARACTER SET ROMS
Optional character set ROMs are available only for
the Model 880 Printer (not the Model 880 DP) and,
once installed, can be selected from the control
panel in the menu mode, or by the software in
escape sequences.
E.2 INPUT BUFFERS
Optional input buffers are used by both the serial
and parallel interfaces for storage of input data.
E.2.1 4K Input Buffer
The input buffer can be optionally expanded to
4096 bytes.
E.2.2 16K Input Buffer
The input buffer can be optionally expanded to
16384 bytes.
E.3 PAPER TEAR BAR
An optional tear bar is available to assist the oper-
ator in tearing the paper. It is used on forms up to
389 mm (15.3 in) wide and tears the forms 856 mm
(3-15/16 in) above the top dot of the current print
line.
E.4 PRINTER STAND
A printer stand is available as an option.
E.5 STAND-MOUNTED PAPER TRAY
A paper tray, designed to be mounted to the
printer stand, is available as an option.
E.6 PRINTER-MOUNTED PAPER TRAY
An optional paper tray, designed to be mounted
to the printer, is available.
E.7 CURRENT LOOP INTERFACE
The Current Loop Interface option is a half-size
board which plugs into the communication con-
troller slot. The interface uses a four-wire, pas-
sive, neutral current loop which does not interfere
with the standard RS-232-C serial interface. Data
can be received from either interface, provided the
other interface is in a spacing condition or its con-
nector is unplugged.
E.8 RS422 INTERFACE
The RS422 Interface is a four-wire serial commun-
ication system which is electrically balanced to
provide better performance at high speeds and
longer distances than is possible for RS-232-C.
Operation at 9600 baud at distances up to
1200 meters (4000 feet) is possible with this
option.
The RS422 Interface option is a half-size board
which plugs into the communication controller
slot.
E.9 RIBBON
Replacement ribbons are available in economical
six-packs (TI Part No. 2246601-0002).
E-1