[Coco] DLOAD mystery
Arthur Flexser
flexser at fiu.edu
Tue Mar 7 04:42:42 EST 2006
Why do you think it should be 41? Because the printer constant is 41 for 1200
baud? Does DLOAD use the same loop for timing that the printer routine uses and
have the same number of cycles per bit of overhead as for the printer? For
the printer, I believe the 300 baud constant is 180, which is neither 4*41 or
4*44. That is, the timing constant isn't exactly directly proportional to the
time per bit because of the fixed overhead for each bit; it's a linear
relationship, but the line doesn't pass through the origin.
Art
On Mon, 6 Mar 2006, Roger Taylor wrote:
> Well, what do you know....
>
> DLOAD is setting the bps value to 44 for 1200bps instead of 41. It's
> setting it to 44*4 for 300bps.
>
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> Roger Taylor
>
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