[Coco] 64/80 column version of Dynacalc?

[Bruce W. Calkins]

On 05/18/2018 02:40 PM, rcrislip wrote:
 > On Fri, 18 May 2018 11:24:54 +0100
 > Tony Jewell <tonyjewell at gmail.com> wrote:
 >
 >> Hi - I'm running it under OS/9, but I should have mentioned I'm
 >> running it on a Dragon too. I'm wondering if the versions of OS/9
 >> that I'm seeing are all 'tweaked' for the 51 column display that
 >> comes with our OS/9 version. Where did you find the version you're
 >> running at 80 columns? I'll grab that and see if it works!
 >>
 >> Many thanks, Tony

<Snip>
 >>
 >
 > OK, That explains it to me. You're running OS9 V1 for the Dragon
 > equivalent of the  CoCo2 which has at most 64k. I know of no way to do
 > 80 columns on that machine. Other might. Anyone???
 >
There is a modification using the graphic screen to have OS-9 using 51 
columns on a CoCo 1/2.  It required Level 1 Revision 2 and some 
manipulation of drivers.  It has been nearly 15 since I had that setup 
running, so the details are a bit foggy now.  That said; the CoCo 1/2 
and dragon used the 6847 Video Display Generator, 80 columns is not 
possible.  Now there was the Word-Pak that used a different Video 
Display Generator that defaulted to 80 columns.  However that also 
needed drivers for OS-9.
Bruce W.