[Coco] DLOAD/HyperTerminal mystery

[Roger Taylor]

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.



-- 
Roger Taylor