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-
- Printers & Interfaces...
- From: TROUBLESOME on DELPHI
-
- I recently acquired a new Xetec SuperGraphix interface to go with my Star
- SR-10 printer and noted that Xetec has been busy making subtle
- improvements.
-
- The most noticeable is the use of a *metal* 36 pin connector in place of
- the plastic one that they usta use, a jacketed and shielded printer cable
- (most likely to comply with the FCC Class B limits) and the termination of
- printer pin 18 inside the interface itself. For those that may not be
- familiar with the Centronics interface, pin 18 on most printers is a 5 volt
- DC supply. It is possible to easily modify the latest version of the Xetec
- to operate from the printer, thus eliminating the need to connect to the
- cassette port (which doesn't exist on an SX-64, by the way).
-
- All that you have to do is open up the interface and find the red lead
- coming from the printer cable. It is soldered to an unused eyelet on the
- printed circuit board. Desolder the lead from the board. Next, locate the
- red lead coming from the serial buss cable. It is soldered to the Vcc buss
- on the interface PC board immediately adjacent to the point where the
- serial buss cable is mechanically anchored. Desolder this lead and cut it
- off or tie it back. Solder the red lead from the printer cable into the
- hole that was vacated by the serial buss lead. Your interface will now
- operate from printer power. You may wish to remove the red lead with the
- cassette port connector from the serial buss DIN plug.
-
- Aside from not having to connect to the cassette port, the modification
- also makes the printer invisible to the computer if the printer is shut
- off. That means that the computer will react with the normal ?DEVICE NOT
- PRESENT error if you attempt to print to a dead printer. This will not be
- the case if the interface is powered by the computer.
-
- If you have a C-128 and you press the RESET button for any reason, you must
- also press the reset button on your interface as well. Otherwise, the
- interface will not respond when attempting to print and you will get the
- ?DEVICE NOT PRESENT error. Pressing the interface reset button also does a
- cold reset of most printers, which will erase any downloaded character sets
- or other user-defined functions.
-
- For those in need of a better printer Computer Centers of America is having
- a printer sale on Star Micronics and other quality printers. For example,
- the Star SR-10 typically sells for 470-500 dollars through mail order. The
- price that CCA is selling it for is about 370 dollars. The Xetec
- SuperGraphix is being sold for about 60 bucks. Their phone number is
- 1-800-631-1003, except in New York state where it is 1-800-221-2760.
-
- I've purchased items from CCA several times and I've been satisfied with
- the manner in which they do business. BTW, the Star SR-10 is a 200
- characters per second printer with NLQ (at 50 CPS), all the usual Star
- operating features, tank-like construction (real heavy duty) and a neat cut
- sheet feeder. I'm * very* pleased with mine.
-
- P.S. If you have an older SuperGraphix interface with a ribbon cable and
- would like to modify it to get operating power from the printer, I will be
- glad to supply printed instructions, complete with a parts list and
- drawing. Contact me via Delphi mail if you are interested. Unfortunately,
- it isn't practical to describe the changes to be made within the confines
- of the Forum.
-
- TROUBLESOME on DELPHI