[Coco] CoCo bitbanger does 115200 bps !

[Diego Barizo]

Does this, by any chance, open a possibility to use a 56 Kbps external 
modem????

Diego


Roger Taylor wrote:

>
> Hear ye, Hear ye!
>
> I'm proud to announce that the same exact code that I wrote for doing 
> 57600 bps communications over the bitbanger port yields *115200 bps* 
> on a CoCo 3 (or any CoCo with a 68B21) when the clock speed is doubled 
> !!  Yes, it was that easy.  Ofcourse, nothing at all about the process 
> is easy, but doubling the bps rate was a matter of just doubling the 
> CoCo's clock rate... but a 2mhz-rated PIA is required which meant the 
> CoCo 3.
>
> I just confirmed quite a few error-free transmissions from the PC to 
> the CoCo for displaying on the screen, and boy does it arrive fast and 
> look good!  I'm using a laptop and a desktop PC both to transmit in my 
> tests, and I'll be adding more sending devices to the list as soon as 
> I can for more testing.
>
> I'm using 100% 6809 code with no hardware modifications whatsoever to 
> any CoCo.  We're talking original CoCo, original bitbanger port, 
> original CPU, original 6821 PIA,.. you get the point!
>
> Any comments?  :)
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