[Coco] CoHR doesn't support cursor position

[Ken H.]

I've got minted working as well with a custom CoHR which includes both the
CoHr/GO51 escape codes and the Tandy COVDG control codes!
Both code sets can be supported simultaneously. The only conflict is $0B
which is erase to EOS on COVDG and Cursor Home on CoHR.  Erase to EOS is
probably not used that much.
Luis - I'll send you a copy for testing later on.
Ken



On Mon, Feb 3, 2014 at 7:39 PM, Ken H. <dragon.atv at gmail.com> wrote:

> 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
>> >>
>> >> --
>> >> Coco mailing list
>> >> Coco at maltedmedia.com
>> >> http://five.pairlist.net/mailman/listinfo/coco
>> >>
>> >
>> > --
>> > Coco mailing list
>> > Coco at maltedmedia.com
>> > http://five.pairlist.net/mailman/listinfo/coco
>>
>>
>>
>> --
>> Long live the CoCo
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>>
>
>