Autor: Piotr Kozłowski (siwus_at_promail.pl)
Data: Wed 27 Jan 1999 - 17:41:48 MET
Dnia Wed, 27 Jan 1999 01:05:39 +0100, BlueByte napisał(a):
>skšd te bzdury o wielkości max. 4MB.
Ludzie piszący drivery do tej karty chyba wiedzą co nieco o niej ?
Masz cytacik z README.tseng z dystrybucji XFree86-3.3.2:
12. ET6000 memory size facts and fiction
The ET6000 uses a special kind of video memory called MDRAM
(multi-bank DRAM). It may have a non-power-of-two amount of
MDRAM: 2.25 or even 4.50 MB. Especially 2.25 MB MDRAM is popular,
since this can support 1024x768 at 24bpp with- out needing 4MB of
RAM.
First of all, All memory above the 4 MB limit is a waste of
money, because the ET6000 cannot use this memory for anything at
all. There are boards with 4.5 MB around, but that extra 0.5 MB
is a waste. The ET6000 can only refresh 4 MB of (M)DRAM (refresh
register). It can only access 64 banks of 64KB in VGA mode (bank
select register). All accelerated commands use a 22-bit address
(=4MB) inside the video memory. You get the idea... There is no
way for the ET6000 to use anything above the 4Mb limit.
>Chcesz screena z PowerStripa z karty z 4.5MB pamięci (4x 1.125MB).
Daruj sobie :-)
Pozdrawiam
-- Piotr Kozłowski siwus_at_promail.pl * UIN:14466572 http://priv.onet.pl/ka/siwus/
To archiwum zostało wygenerowane przez hypermail 2.1.7 : Tue 18 May 2004 - 18:08:12 MET DST