[Coco] DLOAD mystery

[Robert Gault]

Roger,

If you have said which model Coco is running your DLOAD, I've missed it. If 
you are using a Coco3, don't forget that part of the DLOAD code was written 
over and does not exist. You will need to look at the Unravelled series to 
see what was lost and perhaps write a new DLOAD program.

Roger Taylor wrote:
> Can someone tell me what the deal is with the DLOAD command?  It starts 
> out trying to send a 138 out using (8-N-1, I hope), but the PC is not 
> receiving this code correctly.  I mainly keep getting a value of 10 
> which is 138 minus the upper bit.  That makes me believe that DLOAD is 
> somehow missing on sending the first bit of the data.  Every now and 
> then the PC does receive a value of 138.
> 
> However, the DLOAD SendChar routine works fine, though.  If you call it 
> from another ML routine, it will send all 8 bits over to the PC every 
> time.  This is strange, since DLOAD loads a value of 138 into the A 
> register then calls the same routine to send out the character.
> 
> There's two things that might be the problem....?  First, DLOAD is using 
> 44 for the delay for 1200bps when it should be 41.  I've tried matching 
> this on the PC by setting the bps to values from 1000 to 1200, but I 
> can't seem to match it.  Also, DLOAD might not be using 8-N-1 like I think?
> 
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