Re: [colorforth] Where to find AGP details

[Nick Maroudas <alice@xxxxxxxxxxxxxxxxxxxxxxx>]

Dear Jason,

For what it's worth, I found the Video Electronics
Standards Association (VESA) publication VBE3 very
useful.   VESA BIOS EXTENSION (VBE Core Functions
Standard  Version: 3.0).  If you use Linux, it has
words that reveal the video addresses.  Karig of CF
commentary fame had an appendix on the same website
which illustrates the use of VESA codes.  Also the great
Mark Slicker, who is no longer with us, has site with a
CFO1 that incorporates VBE core functions (I wish I had
access to Mark's site, to download that version; if
anyone can help?)

Sorry not to add more detail, but if any of the above
seems worth pursuing I would try to fill in specifics.
Certainly VDU has been the main cause of CF hardware
incompatability in my limited experience; as Chuck
wrote, you have to find that address.

Caritas,

Nick 

Quoting Jason Kemp <jason.kemp@xxxxxxxxxxxxxxxx>:

>... " Good morning all,
>... " 
>... " I am trying to understand a little about how the
>... " AGP works.  How are the 
>... " AGP memory addresses determined?  0x0f0000000 is
>... " for a fujitsu, 
>... " 0xE8000000 seems to work on my ATI with Josh
>... " Grams's 2005 source. Can 
>... " anyone please point me to a datasheet or article
>... " that explains AGP 
>... " configuration, or is this more a BIOS set-up
>... " thing?  It appears that ATI 
>... " don't give away any technical info.  I've found
>... " 
>... "
http://download.intel.com/design/chipsets/datashts/25302704.pdf
>... " but this 
>... " doesn't shed much light (may be I have to spend
>... " more time on that though?)
>... " 
>... " Thanks,
>... " Jason
>... " 
>... " 
>... "
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-- 
Dr Nicolas George Maroudas
Avigdor Meiri 9/1 
Sea View 
Haifa 3 55 00 
Israel 
Tel +972 048 337 315 

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