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From: hsu@cvl.UUCP (Dave Hsu)
Newsgroups: net.micro.apple
Subject: Re: Help, what is a print port address likely to be?
Message-ID: <53@cvl.UUCP>
Date: Tue, 19-Feb-85 11:16:45 EST
Article-I.D.: cvl.53
Posted: Tue Feb 19 11:16:45 1985
Date-Received: Thu, 21-Feb-85 05:26:02 EST
References: <5282@root44.UUCP>
Organization: Computer Vision Lab, U. of Maryland, College Park
Lines: 24

> 
> He has an Apple II e, or Apple II +. He wishes to connect a printer to it
> but does not know the printer port address. Please can you help.
> 

Egads...it is necessary to specify which interface is being used.  i.e.
is he using a generic parallel card? a multifunction card? maybe a serial
card?

For the most part, you don't mess with the hardware ports unless you plan
to write a custom device driver, which in this case doesn't sound likely.
Stick to issuing PR#n where n is the slot number; this way is much simpler.

Assuming he hasn't got the tech manual, the port addresses are found at
hex address C0x0 through C0xF where x = 8 + slot number.  For example,
a printer card in slot 1 (or phantomed there) uses C090 through C09F.

Good luck,

=Dave Hsu=   "...very dangerous. You go first."  (301) 454-4526
ARPA: hsu@cvl  hsu@umd2                  USnail: Computer Vision Laboratory
CSNET: hsu@cvl                                   Center for Automation Research
BITNET: hsu@umd2                                 University of Maryland
UUCP: {seismo,allegra,brl-bmd}!umcp-cs!cvl!hsu   College Park, MD 20742