Yet another VT-100 emulator

[Mark Meiss]

On Dec 17, 2007 6:47 PM, Dave Dunfield <dave06a at dunfield.com> wrote:

>
> As far as I know there are no **STANDARD** PC text video modes that give
> 132 columns.


There's certainly no such mode on the MDA/CGA/EGA/VGA cards as used in the
PC and PS/2.Yes, at 720 dots, you can do a 5 point wide font for 132 columns
on a Herc.,


> Does anyone know if any of the more modern (ie: VGA) cards support
> enhanced
> 132 column text modes?


I think this is a "maybe".  At [
http://www.columbia.edu/~em36/wpdos/textmode.html ], there's a link to a
program that scans for a series of 132-column VESA text modes.  It couldn't
find any on the laptop I tried it on (no surprise), but apparently there are
a number of NVIDIA cards that support these modes.  I don't know what how
the layout compares to the character/attribute pairs for 80-column modes,
but here's the Pascal code they use to try entering the modes:

PROGRAM VesaTest;
   USES Dos;
    VAR ok  : Boolean;
        Reg : Registers;
        i   : Word;
BEGIN
  i := 0;
  IF ParamStr (1) = '132x60' THEN i := 268;
  IF ParamStr (1) = '132x50' THEN i := 267;
  IF ParamStr (1) = '132x43' THEN i := 266;
  IF ParamStr (1) = '132x25' THEN i := 265;
  IF ParamStr (1) = '080x60' THEN i := 264;
  Reg.ax := $4F02; Reg.bx := i;
  Intr (16, Reg);               {VesaTextmodus einschalten}
  ok := (Reg.ah = 0);
  Reg.ax := $0003;
  IF ok THEN Intr (16, Reg)     {auf 80x25 zurckschalten}
  ELSE Halt (1);
END.