RE: MDA text console does only 80x25

Soeren Sonnenburg (sonnenburg@informatik.hu-berlin.de)
Mon, 1 Feb 1999 20:19:57 +0100


> > My vga-console size is 132x60.
> > Since the hercules card is not able to do this (well infact
> i've seen 80x50
> > on such cards, with SoftIce for WinNT) the console driver only
> displays a
> > part of the screen (left top 80x25 rectangle).
>
> Hercules isn´t MDA in some cases.
>
> An Hercules or MDA can be detected by looking on the 7th bit of the
> status register on port 0x3BA. MDA doesn´t use this bit, Hercules
> does. On the vertical Retrace Hercules set this to ´0´
> (Source (don´t laugh!!): Bomanns, "Das große GW-BASIC Buch" 1991, DATA
> BECKER)

8-)

> On a MDA you cannot use graphic-modes, on Hercules you can (720x348, 2
> colors).
> I think, more than 25 lines is a special graphics mode, so MDA cannot
> show it.

Well, I have seen 80x50 (but no more) on 3 different cards that were not
explicitely labeled hercules (At least I think most of the monochrome cards
were hercules-compatible, as were these). Implementing 80x50 would be a neat
feature.
But what I wanted to know is whether the clipping that occurs is correct (or
should not a message consisting of 100 characters be word-wrapped to 80
chars on the first line and 20 on the second, i mean behave differently from
the output on vga-cards that are doing 132x60 ?)
All the syslog that is displayed on the monochrome device is 35 lines
'older':

80x25 (small window)
------------
| | |
|___| |60
| |
| |
------------
132

There must be a way to get everything displayed on the small window (and not
virtually or clipped )!

Thanks,
Soeren.
----
Und nicht vergessen:Pupi in the lapi ist nicht gleich pupi in the schnulko !

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