Vector Graphic Bitstreamer II, User Manual

Page: 29 / 54

Many peripherals hold either or both lines 4 and 20 at +12 VOC. This
allows an alternate method of providing the peripheral with +12 VDC on lines
5, 6,and/or
a.Simply make the appropriate connection(s} at the back of
the peripheral. This can be done by soldering jumpers within the DB-25
connector or external to it. For example, to p12 VDC on lines 5 and
6, you can connect pin 4 to 5, and pin 6 to 20. TDis eliminates ~~e need
for the extra wires in your external cable, though it is a less elegant
solution. Again, this is only necessary if you are not using a 25-wire
ribbon cable.
The following describes the external cabling required by three commonly
used peripherals. In each case, we are referring to the serial interface
version of the peripheral. In each case, do not forget to set the
appropriate channel (usually Channel C) on the 8i tstreamer I I board to the
same baud rate that your are setting the printer.
Use a 25-wire ribbon cable. Alternately, create a 3-wire cable
connecting lines 2, 3, and 7 straight through.
Ignore the instruction in the Hazeltine 1400 Video Display Terminal
Reference Manual (May 1978) in Section 5.5 which direct you to cross lines 2
and 3 if connecting directly to a computer. (That instruction ass~~s you
are connecting to a computer channel configured as Data Terminal Equipment.)
Also
ignore the instruction to connect line 1 and ignore the absence of an
instruction to connect line 7.
(2) Diablo 16H' or 1620 printers, NEe Spinwriter with Diablo protocol, Qune
Sprint 5, or DataProducts letter quality printer with Diablo protocol:
Alternately, you can create a 6~wire cable connecting lines 2, 3, 5, 6,
7, and 8 straight through. However, if you are not using the ASCII
acknowledgement signals sent by these printers and you are not using a
keyboard built into the printer, you do not have to connect lines 2 and 5.
Since roostVector Graphic software makes use of the acknowledgement signals
(emulating the Diablo protocol), you should connect ~~ese two lines when
using a Vector Graphic computer.
Wi th at least the Q1..une, you can use a 3-wire cable connecting only lines
2, 3, and 7 if you connect pins 5, 6, and 8 to pin 20 at the baCK of the
printer.
Note ~~at some roodels of these printers have female sockets in their
rear, in which case you will have to configure a cable with male connectors
at both ends.