Xref: utzoo comp.lang.c:26774 comp.lang.pascal:3207
Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!mailrus!ames!eos!woody
From: woody@eos.UUCP (Wayne Wood)
Newsgroups: comp.lang.c,comp.lang.pascal
Subject: thanks for the memories
Keywords: VGA TASM SEGMENTS
Message-ID: <6418@eos.UUCP>
Date: 11 Mar 90 01:03:11 GMT
Followup-To: poster
Organization: NASA Ames Research Center, California
Lines: 23


okay, heres two questions.

1]  how can i access memory outside of the current program CS at run time?
    i have a data array that exceeds 64K so i need to be able to manipulate
    memory on my own.  
    
    system : COMPAQ 386/25
    memory : 5 meg.
    vga card in 640x480 mode.

2] this ties in with question #1... how can i reliably READ the video memory
   on a VGA?  i have no trouble writing to it directly, but i need to
   read from it directly.  the problem is one of speed.

any pointers on this problem in C, assembler or pascal would be appreciated.
i'm using borland products for all three languages.


/***   woody   ****************************************************************
*** ...tongue tied and twisted, just an earth bound misfit, I...            ***
*** -- David Gilmour, Pink Floyd                                            ***
****** woody@eos.arc.nasa.gov *** my opinions, like my mind, are my own ******/