[Coco] Writting a Rs-232 Pack Emulator .dll

[RETRO Innovations]

On 12/28/2019 7:25 PM, Robert Gault wrote:
> Phil,
>
> I'm not sure exactly what you are asking. At the very least, you 
> should obtain the following:
>
> http://www.colorcomputerarchive.com/coco/Documents/Manuals/Hardware/Deluxe%20RS-232%20Operation%20Manual%20(Tandy).pdf 
>
>
> http://www.colorcomputerarchive.com/coco/Documents/Manuals/Hardware/Deluxe%20RS-232%20Program%20Pak%20Schematic%20(Tandy).pdf 
>
>
> These manuals will show you what is inside the RS-232 pak and the 
> bytes at which it receives and sends data: $FF68-$FF6B.
>
> You might want to look at the NitrOS-9 code that communicates with /P 
> and /T# as the RS-232 pak is used for both printing and terminal use.
> scbbp.asm   for printing
> scbbt.asm   for terminal use
> sc6551.asm  driver
>
> Robert

I'd also suggest the 6551 datasheet: 
http://www.princeton.edu/~mae412/HANDOUTS/Datasheets/6551_acia.pdf