From: Marcel de Kogel <m.dekogel@student.utwente.nl>
Subject: TDOS/80 columns

Hello all,

A while ago, Steve Pitman sent me this idea for the ADAMEm
emulator:
>I've been playing with some of the CP/M emulators for the PC, 
>but I haven't found any as good as TDOS.  TDOS is 80 columns 
>(but you have to scroll to see it all),  how hard would it be 
>to make all 80 colums visible when using Adamem?  It seems 
>like it wouldn't be hard to do. This would be great to have!  
>I could then use my Adam CP/M stuff without scrolling the
>screen all the time.  forget the  80 column cards for the Adam
>(that cost $200 or more),  we could do this for free on the 
>PC,  well I shouldn't say "we could",  I couldn't, but you're 
>the expert.


He's quite right of course. TDOS maintains an off-screen buffer
containing all 80 columns and if I could find a way to detect 
the address of this buffer at runtime I could make the emulator 
switch to 80x25 text or maybe a super VGA mode and display all 
80 columns without having to implement serial port- and terminal
emulation. Does anyone know how to detect the address of this 
buffer ?

Marcel

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