[ColorForth] Graphic compability

["Jimmy Söderman" <hiraganagos@xxxxxxxxxxx>]

Regarding hints on that Graphics modification, ill have to get back to you, 
becuase i havnt understood the complete source myself, far from it, so i 
rather not mess with it yet, also a problem i code in NASM, not MASM (lots 
of names there), timeconsuming.
I just wante to get some wheels turning while im trying aswell.
The more the merrier ;)

But what i do know is this, that snippet has never ever failed me this on 
setting a graphics mode, even portables from 1999+ no problems, so its 
defintly worth a shoot, & indeed opens up who can use ColorFORTH if its the 
graphics thats the problem.

Btw. while im at it i want to mention a MASM2NASM converter wich i 
unfortunly couldnt get to work as i wanted, anyone else up for it?
NASM is nicer, cleaner, simpler syntax, and open source , wich follows FORTH 
philosphy more too imho.
With this said i hope many others than me would like to see a NASM 
conversion of ColorFORTH.

Link: http://strawberry.cs.uwyo.edu/~cosc2150/files/m2nasm/

for the heck of it ill post other translators, those allways gets handy:
http://www.niksula.cs.hut.fi/~mtiihone/intel2gas/
http://membres.lycos.fr/placr/a2i.html
http://www.bumba.net/~hmaon/a2i/



> From: Bob Shafer <bobsh@xxxxxxxxx>
> Reply-To: ColorForth@xxxxxxxxxxxxxxxxxx
> To: "ColorForth List Member"  <ColorForth@xxxxxxxxxxxxxxxxxx>
> Subject: [ColorForth] Graphic compability
> Date: Sun, 16 Jun 2002 12:21:18 -0700
>
> I've made a couple of quick attempts at fixing up the source to do things 
> like you describe. Unfortunately, I really don't know what I'm doing, 
> assembler-wise (more hints would be appreciated :-). It would be really 
> neat if this modification would open colorForth up to more people. Has 
> anyone tried this technique, got it working where colorForth already works, 
> and then taken it to a machine where the original doesn't work, with 
> success?
>
> At 09:46 AM 6/16/02 +0000, you wrote:
>
> > As i discovered there is more or less serious incompability with 
> > graphiccards & ColorFORTH, and i hope ive spotted the "problem",
> > i might be wrong though., Ok im now going rather technical, so here we go:
> >
> > It seem to use (VESA) VBE BIOS to set its graphicsmode, but hardware 
> > probing for getting the actual startaddress of grahics.
> > VBE utilizes a standarzed way to get to that, without probing, ill post a 
> > snippet ill used succesfully in my own projects, and Chuck, or someone 
> > else might wanna test it.
> >
> > As its a standard way since 1996-1998 and now works on 99.9% graphics 
> > cards (S3 and onwards).
> >
> > Put into Boot.asm (i guess would need other changes too, so its just an 
> > suggestion.)
> > mov di,ModeInfoTable  ; 256 byte table needs reserved anywhere in memory.
> > mov ax,04f01h
> > mov cx,4114h     ; 800x600 ( use 4117h if you want 1024x768 )
> > int 10h
> > mov ax,04f02h
> > mov bx,4114h     ; 800x600 ( use 4117h if you want 1024x768 )
> > int 10h
> >
> > And now, later when in 32bit mode, and you want to have the 
> > graphicaddress, just fetch 32bit-address at ModeInfoTable+20h, no 
> > hardwarespecific probing needed.
> >
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