Xref: utzoo comp.sys.amiga.hardware:8183 comp.sys.amiga.programmer:2616
Path: utzoo!utgpu!news-server.csri.toronto.edu!eecg.toronto.edu!leblanc
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.programmer
From: leblanc@eecg.toronto.edu (Marcel LeBlanc)
Subject: Accessing BUSY, SEL, and POUT via "parallel.device"?
Message-ID: <1991Apr12.165832.12620@jarvis.csri.toronto.edu>
Summary: Is it possible?
Keywords: Parallel, centronics
Distribution: na
Date: 12 Apr 91 20:58:32 GMT
Lines: 25

[]

The parallel port on the Amiga (and other computers) includes a few
bi-directional I/O lines other than the 8 data lines (BUSY, SEL, and POUT
connected to the 'other' CIA device).  Is it possible to read and write
these using the parallel.device, or is it necessary to write to CIA A
directly?  I have the 1.2 Libraries and Devices reference, but it doesn't
mention anything about this (unless I missed it, of course).

I am building a ROM emulator for my hardware prototyping (which I do
regularly), and I'd like to be able to quickly transfer the ROM code to the
emulator via the Amiga's parallel port.  Since I'm using the Amiga for all
my software development, it makes sense to plug the emulator into the Amiga
for instant ROM updates (and not some dumb clone).

Can these lines be set to ouput, and written via the 2.0 parallel.device?  I
am using KS 2.02 (I forget the KS version number).  If anyone can describe
to me how this is done (or where to find references I missed in the 1.2
RKM), I'd be very greatful!!!  I don't want to acces the CIAs directly!!!

Thanks for any info!

Marcel A. LeBlanc  --  Electrical Eng. Computer Group, Univ. of Toronto
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