Article View: comp.sys.atari.st
Article #4845Input thru parallel port
From: Edgar Schwietzke
Date: Sat, 14 Oct 1989 07:02
Date: Sat, 14 Oct 1989 07:02
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1023 bytes
Could somebody please explain whether there is the risk of damaging the soundchip when an output signal from a TTL-compatible (no tri-state or open-collector) device is directly fed to the printer port? As far as I know, the printer port is switched to output mode during system initialization. Therefore, there is a good chance that the port lines are tied to different voltage levels until the port is explicitly switched to input mode. I'm using a A/D converter directly connected to the printer port without any problems so far. Nevertheless, I'd like to know what's going on ... Edgar
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!ucbvax!DBNUOR1.BITNET!SCHWIETZ From: SCHWIETZ@DBNUOR1.BITNET (Edgar Schwietzke) Newsgroups: comp.sys.atari.st Subject: Input thru parallel port Message-ID: <8910140702.AA02424@ucbvax.Berkeley.EDU> Date: 14 Oct 89 07:02:28 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 16 X-Unparsable-Date: Fri, 13 Oct 89 13:22:44 MEZ