video RAM (0b800h)

  • Thread starter Thread starter M.El Nahas
  • Start date Start date
M

M.El Nahas

why can't I write on the video RAM (0b800h) using assembly programs,it works
on XP but it doesn't work on vista
 
M.El Nahas said:
why can't I write on the video RAM (0b800h) using assembly programs,it works
on XP but it doesn't work on vista
Click to expand...

That's a DOS trick, I think. I can't imagine that it worked on XP.
Maybe in Win95 compatibility mode?

In general, any program that tries to access hardware directly - which
is exactly what you're doing - will not work in XP or Vista. Also--DOS
mapped video memory to that location, but not XP or Vista.
 
Hi, Tim.

Yeah, that's how we used to do it on the TRS-80! ;^}

I was shocked - happily! - the first time I saw how quickly the screen could
turn white with a Poke command, compared to Print, in BASIC!

RC
--
R. C. White, CPA
San Marcos, TX
(e-mail address removed)
Microsoft Windows MVP
(Running Windows Live Mail 2008 in Vista Ultimate x64)
 
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