From: "da Silva, Joe" 

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Hmmm ... If the program _doesn't_ mess around with the
UART registers, it _can't_ use anything higher than 19k2.
If it _does_ mess around with them, then it will bypass X00
anyway. So, how can X00 help solve the "I can't get more
than 19200 baud" problem? I know there has been lots of
discussion involving lots of software, etc. that I'm unfamiliar
with, but I thought the original problem was an inability to
go beyond 19k2. Perhaps the software in question can be
configured to _either_ use Int 14h to set baud rate or mess
around with the UART registers. In that case, it needs to be
configured to do the latter, because AFAIK, Int 14h doesn't
support > 19200 baud (or 9600 for XT). Or have I missed
something here ... ?

Joe.

> -----Original Message-----
> From:	shadow{at}shadowgard.com [SMTP:shadow{at}shadowgard.com]
> Sent:	Wednesday, February 18, 2004 7:32 AM
> To:	opendos{at}delorie.com
> Subject:	RE: X00 and other stuff, com speed with m$dos 6.22
> 
> On 17 Feb 2004 at 16:56, da Silva, Joe wrote:
> 
> > 
> > Well ... that's just about all programs, they all mess around with 
> > the UART registers to set baud rates > 9600 (XT) or > 19200 (AT) 
> > because, AFAIK, the Int 14h services do not cater for baud rates 
> > higher than this. I wonder if that's the problem - the software here 
> > relies on Int 14h services to set baud rate and hence cannot set 
> > anything beyond 19200? 
> 
> That's *why* I suggested X00. If the progran is using Int 14 services 
> as opposed to directly accessing the UART, then X00 will *ignore the 
> command to change the baud rate and leave it at what it was "locked" 
> at.
> 
> --
> Leonard Erickson (aka shadow)
> shadow at krypton dot rain dot com
> 

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RE: X00 and other stuff, com speed with m$dos 6.22



Hmmm ... If the program _doesn't_ mess around
with the
UART registers, it _can't_ use anything higher
than 19k2.
If it _does_ mess around with them, then it will
bypass X00
anyway. So, how can X00 help solve the
"I can't get more
than 19200 baud" problem? I know there
has been lots of
discussion involving lots of software, etc. that
I'm unfamiliar
with, but I thought the original problem was an
inability to
go beyond 19k2. Perhaps the software in question
can be
configured to _either_ use Int 14h to set baud
rate or mess
around with the UART registers. In that case, it
needs to be
configured to do the latter, because AFAIK, Int
14h doesn't
support > 19200 baud (or 9600 for XT). Or
have I missed
something here ... ?


Joe.


-----Original
Message-----
From:  
shadow{at}shadowgard.com
[SMTP:shadow{at}shadowgard.com]
Sent:  
Wednesday, February 18, 2004 7:32
AM
To:    
opendos{at}delorie.com
Subject:       
RE: X00 and other stuff, com
speed with m$dos 6.22


On 17 Feb 2004 at 16:56,
da Silva, Joe wrote:


> 
> Well ...
that's just about all programs, they all mess around with 
> the UART
registers to set baud rates > 9600 (XT) or > 19200 (AT)

> because,
AFAIK, the Int 14h services do not cater for baud rates 
> higher than
this. I wonder if that's the problem - the software here 
> relies on Int
14h services to set baud rate and hence cannot set 
> anything
beyond 19200? 


That's *why* I suggested
X00. If the progran is using Int 14 services 
as opposed to directly
accessing the UART, then X00 will *ignore the 
command to change the
baud rate and leave it at what it was "locked"

at.


--
Leonard Erickson (aka
shadow)
shadow at krypton dot
rain dot com




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