Deja Vu #09 13 ноября 1999

Железо

drop of solder - a dot-matrix printers.

(C) DT
__________________________________________



   Let's start from the beginning. In 1996
I purchased the printer under the ridiculous price of 200 p.
Unaware that he had not CENTRONICS
interface, and the ill-fated RS-232C, I went home happy. Home, 
sorting out the documentation, I was horrified, and even in the 
supplements my PROFI no COM-port, it was full "paragraph". But 
I'm not used to retreat and decided to go to zheleznyachih 
maker - Zhenya. He looked up and promised to remake

full cassette interface, but to my
Unfortunately, the Tagil get a chip UB
856 turned out to be a problem, and my printer, I
tossed in a drawer. A year later, I decided: either to connect 
it, or take a sledgehammer, and sending him to proottsam! And 
boil the work was reread the mountain of books, delved into the 
sea instructions to the editors. As a result, in February 1998, 
my printer has issued the first peep under the direction of the 
text editor TLW 2, this is an old editor specially calculated 
Printer robotron, because they a completely different table 
than the Epson. Next, I set is-DOS, and took the driver

for LPRINT, I forward I / O ports. And now I come to the most 
important: to ensure communication with the printer I using the 
simplest protocol DTR, it requires only 3 wires.


RxD-line data
DTR-line ban / permit transfer
GND-ground

(NOTE: Data Rate 1200
baud).

   These signals are taken from the printer and pass through 
the circuit interface with a computer. The fact that the 
printer needed data to the printer came in the following 
format: logic 0-12V.; logic 1 in 12. (Not required 12 volts - 
the main thing that was change with the "+" - "and the voltage 
more than 3 volts).


   Busy signal-12c. ready in 12. I have this
signal is connected directly to KR580VV55A.
Next, I plugged RxD signals to the 18 th leg
KR580VV55A (this printer port in Profi), and
DTR signal to the 14 foot KR580VV55A and, accordingly, "earth". 
If you work in is-DOS, then initialize controller command from 
the BASIC OUT 127,153 and run iS-DOS, and then I work as a 
common printer. 

   Changes in driver robotron CM 6329.
01 is in the file robo.lpr.

   WARNING! The file descriptor is not changed,
that does not affect his work,
the only drawback is the driver
that when you press BREAK - System
freezes or resets. If anyone interested in more information, 
write, address at the end.


   I want to note about the article in DV # 08
about the RAM disk. There is an easier way
creating an electronic disk and much faster - it ram_copy.com, 
read the help to program and all will be o'key.


   Thank you for your attention!


       624250 N.tagil-39,

       st. Nedelina, 4-64

             * DT *