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From: ABN.ISCAMS%usc-isid@sri-unix.UUCP
Newsgroups: net.micro
Subject: Wang PC Port Addresses
Message-ID: <14852@sri-arpa.UUCP>
Date: Tue, 27-Dec-83 00:05:00 EST
Article-I.D.: sri-arpa.14852
Posted: Tue Dec 27 00:05:00 1983
Date-Received: Sat, 24-Dec-83 11:04:38 EST
Lines: 24

I'm struggling through Wang documentation and my first exposure to 16-bit
mnemonics (ugh, yet interesting) in an attempt to get good old KERMIT (the
IBM PC/Z100 version) running on a Wang Professional Computer running
MS-DOS.  Documentation does NOT discuss the actual addresses of the serial
port so I can't go straight at it to check status, IN, OUT, etc.  And having
NEVER worked in an interrupt-driven system before, the details on interrupts
and some of the fancy fancy system calls just blow my mind!

Can some kind soul give me some pointers.  If I just knew where to start
LOOKING for that stupid port, maybe I could trial and error my way into
direct access.  Lord, those interrupts scare me!  Got clever, wrote a little
BASIC program to access the port in various ways; compiled it (nice compiler
that Wang has - pretty clean code); then DEBUGged the source trying to find
just what it does.  If no one can help, I THINK I'll find some answers there
(terribly proud of myself for that hack), but I know there are better ways.
Nope, no got a real disassembler for 16-bit.  Yep, got a communications
package with it (proprietary and no source), but it doesn't error-check,
and sure won't mate with KERMIT or MDM71x for other than straight terminal
mode.

Thanks in advance,

David Kirschbaum
Toad Hall