Re: problem reading VGA text fonts

Bender, Bernhard (br@elsa.de)
Wed, 20 Nov 96 14:12:25 -0500

Hi,

Let me say it again: Every single access has the potential to corrupt
memory. There is not workarround. If you do few accesses, you'll seldomly
see the problem.

Bernhard Bender

---
Group Manager Core Technology   ELSA Computer Graphics


ELSA GmbH             		Email: br@elsa.de
Sonnenweg 11                    Fax  : +49 (2405) 450 100
D-52 070 Aachen, Germany        WWW  : http://www.elsa.de




***  Original Message Follows  ***
On Wed, 20 Nov 1996, Bender, Bernhard wrote:


> >>>
> now the interesting question is:  how can we read the BIOS (esp. on 
AXP)
> without currupting video memory ?
> <<<
> 
> Basically, you can't :-(
> 
> The reading of the BIOS ROM itself causes corruption of memory 
contents, 
> no matter how you do it. You can read fast or slow, byte of Dwords, no 
> change.


maybe if using special alignment? eg. only reading the first 64 bits of a
page. Or the last 64 bits.


-- mingo




***  End of Original Message  ***