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From: indra@brahms.amd.com (Indra Singhal)
Newsgroups: comp.windows.ms
Subject: Re: Dropped characters in Win. Comm programs at 19200 baud
Message-ID: <1990Dec20.221110.18376@amd.com>
Date: 20 Dec 90 22:11:10 GMT
Sender: usenet@amd.com (NNTP Posting)
Organization: Advanced Micro Devices, Inc.
Lines: 42

Eric (ej@rci.dk) writes:
>rommel@lan.informatik.tu-muenchen.dbp.de (Kai-Uwe Rommel) writes:
>
>>Earlier Indra Singhal wrote:
>>>I have used Terminal, WinQVT, UniCOM and Microphone II. They all drop
>>>single characters randomly. Outside Windows, Qmodem 4.2b never drops any
>>>characters.
>
>>This is a problem of the COMM.DRV driver shipped with windows.
>
>We are experiencing dropped characters at 19200 baud also outside windows
>and have found that the DOS 3.30 keyboard driver (keyb.com) is the problem.
>
>Are characters dropped only when you use the keyboard, and have you tried
>not to load the keyboard driver?
>
>The reason that Qmodem and other comm programs don't drop characters is, I
>suspect, that they use their own keyboard interrupt routine in order to be
>able to remap the keyboard.

In a separate posting, someone indicated that the dropped characters
only occured in standard mode and not in real mode nor enhanced mode. I
tried the s/w packages in real mode and found that while the frequencyr
of dropped characters is lower, characters were dropped. There is yet another
gentleman at att, who I was unable to send mail to, who has used terminal.exe
without problems at 19200. I do not have any information about the h/w he isr
using. [I have a 286, I cant verify enhanced mode operation :-(]

The theory about the keyb.com, keyboard driver is one I need more information
about. Does Windows 3 require the use of the keyboard driver? How would I
disable it, if at all? I know I do not load it from my config.sys.

I would like this issue to be settled by identifying where the problem is
and if possible encouraging the vendor to fix or patch it.

Some time back, there was someone surveying what we would pay for a decent
comm driver... did anyone keep the address of the poster around?

--
iNDRA | indra@amd.com or {ames apple uunet}!amd!indra
      | (Indra Singhal) (408) 749-5445; Advanced Micro Devices
      | MS 167; Box 3453; 901, Thompson Pl., Sunnyvale, CA 94088