Printer

▀ Reply to message from Vladimir Krasnoperov --> Roman Zagorskih
▀ Date: 30 Nov 98
▀ Subject: Printer

Greetings, Vladimir!

VK>>> What subzh can be screwed to the spec?
VK>>> Any EPSON standard? Or a special one?

Any Epson compatible. Lizhby it had a parallel interface
CENTRONICS.

RZ>> Yes, it seems like any EPSON (or compatible with it). I
RZ>> Russian MC6313 (Good, almost completely ESON compatible
RZ>> printer).
RZ>> What kind of interface will you make? Serial or
RZ>>parallel? (I have a parallel one, it seems easier)

VK> I don’t know. I have a Pentagon 128 with a built-in controller. A
VK> I don’t know which one it is.

Probably ZX LPRINT III. There it is connected via parallel CENTRONICS or
serial RS-232TTL. HO! The serial interface is organized purely in software, i.e. The time frame is set by delays, and therefore the serial
interface is practically not applicable in this design. So it remains
parallel. Data to the printer D0, D1, D2, D3, D4, D5, D6, D7 is supplied from the
register on the Pentagon board (D55) respectively from legs 2, 5, 6, 9, 12, 15, 16,
19. The BUSY signal from the printer is supplied to leg 2 LP8 (D66). The /STROBE signal to the
printer is taken from the 6th leg of TM2 (D67).

Wiring of a standard IBM printer cable(the end that
plugs into the computer):

1 /STROBE
2 DATA BIT 0
3 DATA BIT 1
4 DATA BIT 2
5 DATA BIT 3
6 DATA BIT 4
7 DATA BIT 5
8 DATA BIT 6
9 DATA BIT 7
10 /ACKNOWLEDGE
11 BUSY
12 PAPER OUT
13 SELECT
14 /AUTO FEED
15 /ERROR
16 /INITIALIZE PRINTER
17 /SELECT INPUT
18 GND
19 GND
20 GND
21 GND
22 GND
23 GND
24 GND
25 GND

Soldering of the same cable but from the printer side:

1 /STROBE
2 DATA BIT 0
3 DATA BIT 1
4 DATA BIT 2
5 DATA BIT 3
6 DATA BIT 4
7 DATA BIT 5
8 DATA BIT 6
9 DATA BIT 7
10 /ACKNOWLEDGE
11 BUSY
12 PAPER OUT
13 SELECT
14 /AUTOFEED XT
15 {OSCXT}
16 SIGNAL GND
17 FRAME GND
18 +5V
19 -\
.. GND
30 -/
31 /PRIME
32 /ERROR
33 SIGNAL GND
34 N/C
35 N/C
36 N/C

VK> Q: Sorry for the late reply. There was no time.

VK> ЗЗЫ: I heard the moderator hit the jam day. So..I ...
VK> here.." happy birthday, I wish you happiness in your personal
VK> life - Pooh" ;))).

I join in the congratulations, I wish ... all the best and all that...
;)

P.S. Useful information about the printer is available in Spectrophone N9.
PPS When you connect, connect 1 leg of D65 on the compass board to ground
through the printer connector. It will giveThe controller is able to determine whether the printer is connected to the computer or not. In the diagram this signal is called /ENPR

See you later. Jan Zagorskikh.