[Coco] DLOAD/HyperTerminal mystery

[Gene Heskett]

On Sunday 12 March 2006 04:09, Roger Taylor wrote:
>At 11:54 PM 3/11/2006, you wrote:
>>I'd suspicion thats not 7N1 but 7E1 or 7O1, making use of the parity
>>bit.
>>
>> >It looks like the last bit in the byte is random because I keep
>> > getting bit #7 high when it should be low sometimes, and
>> > vise-versa. This is why the DLOAD "RequestFile" code of 138 comes
>> > in as a 10 on the PC sometimes, and sometimes a 138, when DLOAD is
>> > set to 1200bps.
>>
>>That would be typical of using a parity bit, either odd or even.
>
>It's only typical for a random bit to be in the parity position when
> the other bits are different... as in a 138 being sent, the parity
> bit should be the same each time, no?  Parity is not random, but the
> msbit seems to be.

Thats true indeed.  So I have no further insight into this unforch.  I 
think I'd try different hardware as the first attack on this.

-- 
Cheers, Gene
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