Question about modems

Jim Brain brain at
Fri Nov 15 16:29:08 CST 2019

On 11/15/2019 1:38 PM, Jim Brain wrote:
> On 11/15/2019 3:12 AM, Brent Hilpert via cctalk wrote:
>> (If it is of any consequence at this point)
>> If those vertical groups of 4 are intended to correspond to the first 
>> group of AT/at/At/aT, then you have the case bit (0x20) inverted, 
>> uppercase are bit 0x20 OFF (lower value), lower case are 0x20 ON 
>> (higher value).
> Well, the above values are what an 8N1 connections sees when the other 
> end is set to the various 7 bit parms.  I verified that the numbers 
> above are correct, case and all.

My apologies.  The case is indeed backwards... The caps lock appears to 
have become stuck on in the test machine KB.  Argh!  I know I was 
pressing a shifted A


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