Message-ID: <6858@decwrl.UUCP>
Date: Thu, 5-Apr-84 14:41:42 EST
Article-I.D.: decwrl.6858
Posted: Thu Apr  5 14:41:42 1984
Date-Received: Sat, 7-Apr-84 04:48:02 EST
Organization: DEC Engineering Network
Lines: 20


(sacrificial token offering)

	There seem to be a fair number of low-cost printers coming on 
the market these days, but mostly they come with parallel interfaces, 
for use mainly on IBM-type micros.  I think the prices of the RS232 
serializers are outrageously high, so I'd like to ask if anyone in 
net-land knows of a cheap way to build such a device.  Are there neat 
chip sets that could be brewed up into an interface?  Any suggestions 
or pointers to articles in publications would be appreciated.

	If there is enough interest, I will post summaries of replies.

Thanks as always,
Walter Lamia

    UUCP: ...{decvax,allegra,ucbvax}!decwrl!rhea!topcat!lamia

    ARPA: decwrl!rhea!topcat!lamia@SU-Shasta

Message-ID: <12204@sri-arpa.UUCP>
Date: Wed, 11-Apr-84 15:53:52 EST
Article-I.D.: sri-arpa.12204
Posted: Wed Apr 11 15:53:52 1984
Date-Received: Fri, 27-Apr-84 00:13:06 EST
Lines: 9

From:  Tim Gonsalves 


The Apr 84 issue of REMARK (Heath Users Group magazine) has an RS-232 -
Centronics converter circuit.  Uses a UART + 3 TTL chips + crystal.  Supposed
to work at 9600 baud.  Cost ~ $25. (REMARK is available in Heathkit Electronic
Centers).
			Tim Gonsalves
-------

Message-ID: <12207@sri-arpa.UUCP>
Date: Wed, 11-Apr-84 17:41:00 EST
Article-I.D.: sri-arpa.12207
Posted: Wed Apr 11 17:41:00 1984
Date-Received: Fri, 27-Apr-84 00:13:48 EST
Lines: 12

@flame( What you want is a serial to parrallel converter, not a parallel
to serial converter!)

There was an article describing an extremely clever serial to parrallel
converter in the December, 1983 issue of "microcomputing" magazine
('solution to a serial saga', by Frank Sergeant, page 102).  It uses
an 1802 uProcessor, a ROM, a hex inverter, and an 1852 parrallel latch.

The circuit is designed with CoCo in mind, and does rely on the computer
having a hardware handshaking line on its serial port...

BillW