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Re: [colorforth] Where to find AGP details

Thanks Nick,
Ray here-- Hi all

I'm off line again. Not sure when I can return, possibly mid October,
I hope. When it's a choice between meds and webs, meds win, no matter
how many times you flip the w to an m and the b to a d. I've been able
to get quick 30 minute sessions when I have occasion to pass the
library, about 3-4 miles from the house. I can get a two hour block
reserved and as soon as I have that much info to add to the wiki or
what not, then I'll do that.

Speaking of which... I can get to the library on foot now. This is new
for me. Since the day I fell near dead at work, just about 3 years ago
now, this is the farthest i've set afield, on my own. The last few
months I've been building up to the task, knowing one day I might not
be able to pay the cable bill. Wish I could pay the Fiber bill. It's
being installed in our area currently. Can't wait for that.

My Pentium 4's original Harddrive, the one that was giving me so much
trouble has finally released it's magic smoke. Not having another
harddrive of that size about the house, I finally settled for a very
much smaller one. One I'm not able to get Windows on. I was able (
don't ask me how 'cus' it's quite involved) to get an old linux Debian
Woody booted. That gave me enough tools to get a Ubuntu disk made (
how do you access the CDROM in linux again!?!?!?!?!) booted that and
the very next day my cable cut me off. It's a fairly bare installation
with out web.

In the mean time, I've borrowed a few books on the subject from the
library and I hope to be a pretty Penguin pretty soon.

God - the universal spirit ( insert your favorite diety here ) seems
to be trying to tell me that my computer and inter-next web
connections are not going to be reliable or some such. The tea is
still too cloudy to read. It is quite possible that the Ultimate Power
That Is has something in-store for me to do. Like everything else,
I'll have to prob'ly step in it to find it.

My wife has started to put applications for new positions around. For
the first time in years, I feel like I might could work somewhere
outside of the house now. I can go about 4 hours with out rest or
falling over dizzy now. This is very exciting for me. Much more then
having a web connection. If anybody knows of a good business to start
in the home, I could try that.

If I had my dreams...
I'd get that Charles Childers' RetroForth10, Charles, a few others,
and begin to develop Forth software that will run on Everything!
Everything? Everything. PDA's, Mac's, X86 windows or linux, phones....
Everything.

In the past I had developed an organizer that I call UMN-FOLENDAR (
read as hUMaN Fol-e (folly) Ndar( end-er) ). It has developed over the
years into a full blown product at this point and I'd like to
incorporate it into RetroForth and then run on EVERYTHING!

Life. Get in the game, baby!
Ray

On Sun, Sep 14, 2008 at 12:36 AM, Nick Maroudas
<alice@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Here is another snippet on PCI details - from a
> tutorial
> that Ray and I are working on.
>
> A Tutorial on the PCI block 46
> ___________________{{_________
>
> The pci bus is the one that most other PCI devices hang
> from:  graphics, souncard, ethernet, usb, etc.  The PCI
> ADDRESS system is a bit confusing at first, but Chuck's
> code is elegantly simple.  Also, he has set it out
> better in his original CF of 2001 than in his later
> release of 2005.  Accordingly, we shall start with
> block 46 of CF01 and show how this explains some things
> in CF05.
>
> Firstly, to address any pci device, one has to WRITE
> its
> REGISTER ADDRESS into pci bus port  CF8  then  R/W data
> to/from that device register via pci bus port  CFC
>
> By register address we mean the address (on the bus) of
> any one of the 64 (or 256?) registers which belong to
> (are bound to) a particular pci device.  So Chuck, in
> CF01, defines the word  ADD  (for pci ADDress)
>
>            : ADD  CF8 a!  CFC a! ;
>
> which loads the COLORFORTH address register (a!) with
> the PCI bus addresses  cf8  and  cfc.
>
> Now suppose we wish to query one of a particular
> device's registers (say the one at regaddr) and read
> its data.  CF01 has the word  Q  (for Query); it adds a
> 1 to the msb of regadr then puts the resultant 4byte
> regadr into cf8 and fetches the 4byte regdata from cfc
>
>        regaddr-- : Q  80000000 +  ADD 4@ ;  --regdata
>
> Now, as a dangerous tutorial exercise, we can define
> our own word  P  to write our data to a device register
>
> regdata regadr--  : P  80000000 +  ADD 4! ;
>
> Now that we know about CFO1, we can appreciate what is
> happening on block 46 of CF05.  Firstly, regaddr has
> been redefined as a 4byte address 8regaddr so its msb
> is already set.  Accordingly Q has been redefined as
> PCI  which does the same query job
>
>        8regaddr--  <PCI>   --regdata
>
> But where is this new word  PCI  defined? Unfortunately
> not in block 46; it must have been written somewhere
> else in assembly code - a retrograde step from CF01.
> On the other hand CF05 has a new word  PCI!  which does
> the same put job as our  P  above
>
>   regdata 8regaddr--  : PCI!  pci drop 4! ;
>
> The reason why PCI is predefined in assembly in CF05
> might be that CF05 begins with a new block 20 for USB
> which needs PCI - but CF words for PCI will only come
> later, in block 46.
>
> Incidentally the word "k" in CF05 46, which is supposed
> to find
> all the PCI devices, does not find the USB controller
> on
> my new
> Intel board.  This is because CF05 has been set to
> search in steps
> of 800h (like CF01); I soon found this USB controller
> by
> searching
> upwards in steps of 200, and adjusted the address "USB"
> in block
> 46 accordingly.  But there was no difficulty with
> finding the AGP
> video card on my old ASUS P2 with "k", and its
> registers
> with "ok" after putting the right address into the
> variable "AGP".  Nor was there much problem adjusting
> for the nVidia Force video card in my new Intel board.
> Once the address had been found (by Linux) I added the
> following word to block 30:
>
>   : display 40000000 3e8 ! ;  display
>
> I guess CF address 3E8 must hold the display address, in
> Josh's CF05 image that I use.
>
> Hope it helps - anyway, got that off my chest,
>
> 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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-- 
Raymond St. Marie ii,
public E-mail Ray.stmarie@xxxxxxxxx
a quickstart guide http://colorforthray.info
Community Blog http://colorForth.net
Community Wiki http://ForthWorks.com/c4th

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