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- From: smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC)
- Newsgroups: sci.electronics
- Subject: Re: Par pc-port bidirecti
- Date: 13 Nov 1992 13:29:26 GMT
- Organization: SunConnect
- Lines: 30
- Sender: smckinty@France.Sun.COM (Steve McKinty - Sun ICNC)
- Distribution: world
- Message-ID: <1e0ajnINN9kp@grapevine.EBay.Sun.COM>
- References: <gate.4ZT6TB1w165w@toz.buffalo.ny.us>
- NNTP-Posting-Host: hardy.france.sun.com
-
- In article <gate.4ZT6TB1w165w@toz.buffalo.ny.us>, cyberman@toz.buffalo.ny.us (Cyberman) writes:
- >
- > Pascal Roobrouck Sh53 entitled a message as 'Par pc-port bidirectional',
- > on the 11-10-92 14:05 to All.
- > PRS> I have a development kit for MCU's with a programmer that plugs into
- > PRS> the Centronics port of a PC. In the manual they say you need an AT.
- > PRS> However at home I have still an XT. The programmer software always
- > PRS> hangs on my XT when he tries to READ something from the Parallel port.
- > PRS> (a blank check..) On an AT at my office, it works fine ...
- >
- > If I remember the XT's port is implemented with some discret
- > TTL parts and the AT utilizes an 8255. BIG difference.
-
- The standard PC/XT parallel port is write-only, its just intended for
- driving a printer. ATs usually have bidirectional ports.
- >
- > PRS> Here my question : is there a difference in hardware between the
- > PRS> centronics port implementation in the XT and the AT PCs or is it only
- > PRS> the manufacturers 'fault'. Maybe I could buy an extra parallel port
- > PRS> for my XT that works well ??
-
- Probably, but make sure it is a read/write port.
-
- steve
-
- --
- Steve McKinty
- SUN Microsystems ICNC
- 38240 Meylan, France
- email: smckinty@france.sun.com BIX: smckinty
-