nanogui: Thread: will thias work

Could I get nano-X to work on a 286 cga with 1mb ram?

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Anurodh Pokharel
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  -----Original Message-----
  From: Anurodh Pokharel ####@####.####
  Sent: 11 January 2000 11:23
  To: nanogui
  Subject: will thias work


  Could I get nano-X to work on a 286 cga with 1mb ram?

  I'm not aware that anyone has written a cga mode driver for nano-X.
(what's the graphics ability of a cga card?)  But via elks or dos it's
entirely feasible that microwindows/nanox will run perfectly.  I suggest you
investigate ELKS for an OS and then nano-X on top of that.  I alsu suspect
that you will have to write some code of your own to get cga running :)

      -Darran
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   Darran D. Rimron            European Research & Development Manager
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On Tuesday, January 11, 2000 4:23 AM, Anurodh Pokharel  wrote:
: Could I get nano-X to work on a 286 cga with 1mb ram?
: 
Yes, if you run DOS.  Victor just submitted a DJGPP/GRX
port of Microwindows.  I don't know if DJGPP supports 286
or just 386...

Greg

Just 386+ PM code.  I've modified AT&T-2-Intel ASM converter that I found
to take x86 GAS .S files and turn them into valid DOS 64K .COM NASM ASM
files.  You can find this util at <http://fdcoder.n3.net/a2i/> in a zip
file.  Otherwise, there is no way to get GCC/DJGPP output even real mode
code.

Louis

------------------------------------------------------------------
"If a frog had wings, he wouldn't bump his a$$ when he hopped!"
                          - Red Foreman of That '70s Show

On Tue, 11 Jan 2000, Greg Haerr wrote:

> On Tuesday, January 11, 2000 4:23 AM, Anurodh Pokharel  wrote:
> : Could I get nano-X to work on a 286 cga with 1mb ram?
> : 
> Yes, if you run DOS.  Victor just submitted a DJGPP/GRX
> port of Microwindows.  I don't know if DJGPP supports 286
> or just 386...
> 
> Greg
> 
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: Yes, if you run DOS.  Victor just submitted a DJGPP/GRX
: port of Microwindows.  I don't know if DJGPP supports 286
: or just 386...

As Darran just mentioned, you will have to hack a CGA driver, 
which will be some work.  Take the scr_bios.c driver and 
grab an old IBM book and find the bios mode for 320x200,
and pass that to int10.  In addition, the drawline readpixel
address calculations are slightly different, I think.

I'd write it for you but I don't have any CGA machines
anymore ...

Greg

On Tue, 11 Jan 2000, Greg Haerr wrote:
> I'd write it for you but I don't have any CGA machines
> anymore ...

I thought (S)VGA cards had a CGA backwards compatibility mode?

--------------- Linux- the choice of a GNU generation. --------------
: Alex Holden (M1CJD)- Caver, Programmer, Land Rover nut, Radio Ham :
-------------------- http://www.linuxhacker.org/ --------------------

Modes 0x00 - 0x06 are part of the CGA spec and have their memory located
at 0xB800:0x0000. I have two 8088s with CGAs that I'd be willing to test
DOS programs on.  The following is from RBIL w/irrelevant parts snipped...

Louis

     text/ text pixel	pixel	colors disply scrn  system
     grph resol	 box  resolution       pages  addr
 00h = T  40x25	 8x8   320x200	16gray	  8   B800 CGA,PCjr,Tandy
 01h = T  40x25	 8x8   320x200	 16	  8   B800 CGA,PCjr,Tandy
 02h = T  80x25	 8x8   640x200	16gray	  4   B800 CGA,PCjr,Tandy
 03h = T  80x25	 8x8   640x200	 16	  4   B800 CGA,PCjr,Tandy
 04h = G  40x25	 8x8   320x200	  4	  .   B800 CGA,PCjr,EGA,MCGA,VGA
 05h = G  40x25	 8x8   320x200	 4gray	  .   B800 CGA,PCjr,EGA
 06h = G  80x25	 8x8   640x200	  2	  .   B800 CGA,PCjr,EGA,MCGA,VGA
 

------------------------------------------------------------------
"If a frog had wings, he wouldn't bump his a$$ when he hopped!"
                          - Red Foreman of That '70s Show

On Tue, 11 Jan 2000, Greg Haerr wrote:

> : Yes, if you run DOS.  Victor just submitted a DJGPP/GRX
> : port of Microwindows.  I don't know if DJGPP supports 286
> : or just 386...
> 
> As Darran just mentioned, you will have to hack a CGA driver, 
> which will be some work.  Take the scr_bios.c driver and 
> grab an old IBM book and find the bios mode for 320x200,
> and pass that to int10.  In addition, the drawline readpixel
> address calculations are slightly different, I think.
> 
> I'd write it for you but I don't have any CGA machines
> anymore ...
> 
> Greg
> 
> 
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> To unsubscribe, e-mail: ####@####.####
> For additional commands, e-mail: ####@####.####
> 

They do but they support it as if they were VGA cards which sometimes
changed the resolution & color characteristics.

Louis

------------------------------------------------------------------
"If a frog had wings, he wouldn't bump his a$$ when he hopped!"
                          - Red Foreman of That '70s Show

On Tue, 11 Jan 2000, Alex Holden wrote:

> On Tue, 11 Jan 2000, Greg Haerr wrote:
> > I'd write it for you but I don't have any CGA machines
> > anymore ...
> 
> I thought (S)VGA cards had a CGA backwards compatibility mode?
> 
> --------------- Linux- the choice of a GNU generation. --------------
> : Alex Holden (M1CJD)- Caver, Programmer, Land Rover nut, Radio Ham :
> -------------------- http://www.linuxhacker.org/ --------------------
> 
> 
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> To unsubscribe, e-mail: ####@####.####
> For additional commands, e-mail: ####@####.####
>