[Coco] CoHR doesn't support cursor position

[Ken H.]

minted doesn't work because it uses the Tandy escape codes which are
different.
Though it shouldn't be hard to modify CoHR to accept the Tandy codes as
well.


On Mon, Feb 3, 2014 at 6:02 PM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> does minted work fine too ?
>
> On Mon, Feb 3, 2014 at 10:57 AM, Ken H. <dragon.atv at gmail.com> wrote:
> > Hi,
> > The CoHR level1 51 column driver source has full support for escape
> > characters (GotoXY, cursor positions, underline on/off, reverse on/off
> etc).
> > For example   DISPLAY 1B 41 X Y  - move  cursor to position X(0-50),
> > Y(0-23).
> >
> > But this escape code feature has been broken in NitrOS9 for a long time
> > (did it ever work?)
> >
> > I have investigated this problem, and the bug is actually is the VTIO
> > module.
> > VTIO does not pass the 1B escape code to CoHR, and instead generates a
> 246
> > (Not Ready) error.
> >
> > The following 4 line patch to VTIO provides a fix for this problem.
> >
> > Write    ldb   <V.NGChr,u are we in the process of getting parameters?
> >             bne   PrmHandl   yes, go process
> >             sta   <V.WrChr,u save character to write
> >             ldb   V.51EscSeq,u                                      **<<
> > ADD: In Escape sequence?
> >            bcc   GoCo
> > **<< ADD: Yes, send to COHR
> >            cmpa  #C$SPAC    space or higher?
> >            bcc   GoCo       yes, normal write
> >           cmpa  #$1B
> **<<
> > ADD: COHR Escape Code?
> >           bcc   GoCo
> > **<< ADD: Yes, send to COHR
> >           cmpa  #$1E       escape sequence $1E or $1F?
> >
> >
> > The nice thing about this fix is that we can finally run Dynacalc in 51
> > columns mode on a level 1 CoCo.
> >
> > The CoHR escape codes are based on the Dragon's GO51 display functions.
> > Therefore, Tandy's version of Dynacalc will not work, but the Dragon
> > version of Dynacalc (
> >
> http://archive.worldofdragon.org/archive/index.php?dir=Disks/Dragon/&file=Dragon%20Data%20Ltd%20-%20OS-9%20Dynacalc.zip
> )
> > works fine also on the CoCo.
> >
> > Even better, the STYLOGRAPH word processor (also on the dragon archive)
> > also finally works with this patch!
> > AFAIK, Stylograph (arguably the best wp for OS9), isn't otherwise
> available
> > for the CoCo.
> >
> > You do need a stripped down build of NitrOS9 to have enough free memory
> to
> > run these programs.  I was able to run them with a minimal boot disk with
> > 129 pages free.
> >
> > As far as I could tell this fix doesn't break anything else, but before
> we
> > commit this change maybe someone else can test it out?
> >
> > Cheers,
> > Ken
> >
> >
> >
> >
> > On Mon, Apr 15, 2013 at 8:41 PM, Luis Antoniosi (CoCoDemus) <
> > retrocanada76 at gmail.com> wrote:
> >
> >> Hi,
> >>
> >> Why CoHR doesn't support home, cursors position and other terminal
> commands
> >> ? The only supported feature seem to be the the clear screen.
> >>
> >> It wouldn't be hard to implement them but I ask why it wasn't made
> before ?
> >> This kills completely its utility as no screen based program will ever
> run
> >> on it. I can't think why people would use CoHR if dynacalc doesn't run
> on
> >> it.
> >>
> >> Also, for CoVDG, it doesn't support line delete and insert 1F 30 and 1F
> 31.
> >> We could make better applications for them if they were all supported.
> >>
> >> I think that I going to patch them :)
> >>
> >> Felipe.
> >>
> >> --
> >> Long live the CoCo
> >>
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> >>
> >
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>
>
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