Autor: Marcin Debowski (agatek_at_chem.pg.gda.pl)
Data: Fri 12 Apr 1996 - 09:32:09 MET DST
Marcin Debowski (agatek_at_chem.pg.gda.pl) wrote:
: Czy to cecha chip'a czy driverow ? Moze sa jakies mniej pamieciozerne ?
: I w ogole to czemu tak wlasnie jest ... z tego co mowi kaleki user's
: guide nie wszystkie karty maja takie wymagania.
pogrzebalem w archiwach s3 i znalazlem takie czesciowe wyjasnienie :
(End User FAQ)
Why do the S3 Windows drivers support
more color depths than the S3 OS/2
drivers on the same hardware?
There are two reasons why a color depth/resolution combination
might be supported in Windows and other operating systems, but
unsupported in OS/2 with the S3 driver.
1.The Windows and OS/2 drivers both need some off-screen
memory for caching fonts, etc. However, the OS/2 driver
needs some off-screen memory for both the Presentation
Manager and Win-OS/2. This additional display memory
overhead prevents some color/resolution combinations from
being displayed unless you have more video memory.
i dodatkowo
2.The S3 OS/2 driver does not currently support 24-bits per
pixel for 16.7 million color (true-color) modes. For 16.7M
colors, the OS/2 drivers use 32-bits per pixel only. In
true-color mode, each pixel only requires 24 bits, so 8 bits are
unused for each pixel when using 32-bit color modes. This
prevents 640x480 at 16.7M colors from being displayed on
1MB video hardware and 1280x1024 at 16.7M colors from
being displayed with 4MB. In contrast, the S3 Windows
drivers support both 32-bit and 24-bit color modes.
co nie wyjasnia czemu inne chipy moga
pozdrawiam
--
Marcin Debowski
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> http://www.pg.gda.pl/~agatek/mdhp.html >>>>
To archiwum zostało wygenerowane przez hypermail 2.1.7 : Tue 18 May 2004 - 12:42:27 MET DST