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Path: utzoo!linus!vaxine!wjh12!genrad!decvax!harpo!ulysses!burl!we13!ihnp4!zehntel!zinfandel!dave
From: dave@zinfandel.UUCP
Newsgroups: net.micro.cbm
Subject: Re: 1200 baud modem won't work on 64. - (nf)
Message-ID: <1413@zehntel.UUCP>
Date: Sat, 14-Apr-84 04:32:36 EST
Article-I.D.: zehntel.1413
Posted: Sat Apr 14 04:32:36 1984
Date-Received: Sun, 15-Apr-84 01:57:26 EST
Sender: berry@zehntel.UUCP
Organization: Zehntel Inc., Walnut Creek, CA
Lines: 31

#R:vaxwalle:-14200:zinfandel:19800005:000:1257
zinfandel!dave    Apr 12 14:42:00 1984

As far as being able to type in commands successfully but receiving 80
percent garbage goes, I think I know what the problem is.

When I was writing my assembly language 1200 baud program, I followed
instructions in the Commodore Reference Manual for setting up baud rate,
word length, parity, etc.  When I ran the program, I was able to type
in commands (and have them understood) but the information I *received* 
was, indeed, about 80 percent trashed.  I finally used a machine language
monitor to examine all the 'parameter' registers that are used by RS232.
When I looked at the one that contains the word length, it was set 
to $09.  My program tries to set it to $08 (via the appropriate kernal
calls).  For some reason, I can't set it to $08 (or anything else for that
matter) by using the kernal call.  As a fix, I specifically placed an '08'
in the proper register and the program worked fine (zero garbage).

I apologize for not giving the specific addresses and calls, but I don't
have the Reference Manual in front of me.  If anyone is interested, let
me know and I'll look them up.

Dave Funk
Zehntel, Inc.
2625 Shadelands Drive
Walnut Creek, CA  92598
(415) 932-6900 x309

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