Operation
U N I B it E m ul at io n
9
UNI Bit Emulation
Handshake:
The printer activates the feedback DTR, whenever paper is missing. At the same time,
X-OFF is transmitted on the TxD line. If less than 32 free bytes are available in the input
buffer, the DTR line is activated as well. X-OFF is sent on the TxD line.
Un i-B it
uses the following control commands:
Command
Description
Comment
LF (0A hex)
Line Feed
Line Feed
CAN (18 hex)
Cancel
Erase Buffer
ESC z 2 01h
Data Mode
ESC z 2 02h
Text Mode
SI (0F hex)
Shift in
40% Reduced Print
DC2 (12 hex)
Device Control 2
Stop Comp. Print
DC4 (14 hex)
Device Control 4
Stop Wide Format Print
ESC W1
Double Width
Until Canceled
ESC W0
Double Width
Until Canceled
SO (0E hex)
Shift Out
Print Double Width
CR, LF, DC4 or CAN
Cancels Wide Print
Character Sets:
The
Uni Bit
works with 40 or 80 characters / line. The 132 cpl font is cannot be realized
and is processed as 80 cpl.
Virtual print width is set to 560 pixels, 70 bytes:
Standard Print :
80 cpl = 7x16 font standard double height
Wide Format Print : 40 cpl = 7x16 font standard double height double width
Condensed Print:
80 cpl = 7x16 font standard double height
Cyrillic character set
only requires 20h – 7Fh (not implemented yet)
Standard Print :
80 cpl = 7x16 font cyr double height
Wide Format Print : 40 cpl = 7x16 font cyr double height double width
Condensed Print:
80 cpl = 7x16 font cyr double height
G e B E E +F G m b H • w w w . o e m - p r i n te r . c o m • G e B E D o c . N o . S M A N - E - 487 - V 1. 1 • G P T - 444 3 • P ag e 9/ 12
Connecti on
No. GPT-4443
Signal
Directio n
Comment
Connecti on
No. at Uni Bit
Signal
Uni Bit
2
3
TXD
RXD
OUT
IN
printer data output
printer data input
4a
6a
TXD
RXD
5
6
GND
DTR
---
OUT
signal ground
PE / handshak e printer output
2c, 4c, 6c
2a
GND
DTR
Connecting the Serial Interface RS232 (V.24) to the SUB-D 9 Pin Socket
