Operation
P ri m o B it E m ul at io n
8
Primo Bit Emulation
Handshake:
Activates the DTR line, when less than 32 free bytes are available in the input buffer.
Since a TxD (printer data output) does not exist, neither a software handshake, nor a
transmission error message is possible.
Paper End:
Since an extra handshake line at the printer is not available, the TXD line is used.
Whene-
ver there is no paper, the printer changes TXD to inactive: -12V. Operational = +12V
Pri mo Bit
uses the following control commands :
Command
Description
Comment
DLE (10 hex)
Data Line Escape
Erase Memory
LF (0A hex)
Line Feed
Line Feed
CR (0D hex)
Carriage Return
Trigger Printing with Feed
SO (0E hex)
Shift out
Wide Format Print Off
SI (0F hex)
Shift in
Wide Format Print On
Character Sets:
Primo Bit. Works with 25 or 12 characters / line
Virtual print width is set to 400 pixels , 50 bytes:
Standard Print :
25 Z/Z = 16x24 font standard
Wide Format Print :
12 Z/Z = 16x24 font standard double width
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 8/ 12
Connecti on
No.GPT-44 43
Signal
Directio n
Comment
Con nec tion No.
at Prim o Bit
Signal
Primo Bit
2
3
TXD
RXD
OUT
IN
paper end or cassette removed
printer data input
20
3
DTR
RXD
5
6
GND
DTR
---
OUT
signal ground
handsha ke output of the printer
7
4
GND
RTS
Connecting the Serial Interface RS232 (V.24) to the SUB-D 9 Pin Socket
