Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!rpi!uupsi!grebyn!ckp
From: ckp@grebyn.com (Checkpoint Technologies)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Dual Serial Boards
Message-ID: <20079@grebyn.com>
Date: 25 May 90 16:18:34 GMT
References: <2787@crash.cts.com>
Reply-To: ckp@grebyn.UUCP (Checkpoint Technologies)
Organization: Grebyn Timesharing, Vienna, VA, USA
Lines: 28

In article <2787@crash.cts.com> hawk@pnet01.cts.com (John Anderson) writes:
>
>   I just purchased the Sharp JX 100 color scanner (incredible results) and am
>now in the need for a dual serial board so my modem can simultaneously be
>hooked up at the same time.  I have heard of two of them, actually three.  The
>first two are all serial boards.  One is from ASDG and lists for $300 but can
>be had for less through ABel Supply, and the other is from Checkpoint
>technologies and lists for $200, and can also be had for less.  My question
>is: has anybody used any of these before and waht are the differences besides
>that the ASDG board comes with 2 AT size serial ports and the Checkpoint board
>comes with one full size and one AT size?  Are there any problems with any? 

ASDG has a "Serial Dispatcher" which presents a port requester when a
program opens serial.device, and they have an AUX: handler.  We
(Checkpoint) have "NewPort", which checks an application, then
makes a tiny (~500 bytes) stub loader that loads in the application and
redirects it to our device name, and we have a "serial preferences"
utility for the new serial ports.  We hook to readily-available MIDI 
interfaces and offers a 100% correct 31250 baud rate.  Neither offer any
problems, except that neither work with programs that bang the
Amiga's built-in serial port hardware directly.  Both are competent
and will do just what you want.  Since I'm speaking
for Checkpoint here, of course I'll say you should buy ours. :-)
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