From: baldo AT chasque DOT apc DOT org
Message-Id: <3.0.1.32.19970725050105.0068c1a0@chasque.apc.org>
Date: Fri, 25 Jul 1997 05:01:05 -0300
To: Myke AT cyberdude DOT com (Ricardo Cunha)
Subject: Re: Vesa 2.0 is slower than 1.2 on my video card !!!!!
Cc: djgpp AT delorie DOT com
In-Reply-To: <33d79d82.403618@news1.telepac.pt>
References: <199707221500 DOT IAA26318 AT adit DOT ap DOT net>
 <h9b6bEAOrn1zEwLf AT netbook DOT demon DOT co DOT uk>
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At 08:14 PM 24/07/1997 GMT, you wrote:
>>No SIR!
>>VESA is a software API. SDD >is< VESA 2.0, not an emulation.
>>The difference between SDD and your card is that SDD goes TSR, but your
>>card is in ROM from the start.
>>
>>Guess why it's in ROM, folks.. it's software :)
>>VESA is an API, which means that instead of having a gazillion different
>>calls to put a pixel on a screen, you only do one, and VESA picks the
>>right one for your video card.
>>
>>VESA translates, but not from 2.0 > 1.2 - it translates VESA calls to
>>direct hardware writes.
>
>That's right but...
>
>When a board suports Vesa 2 Vesa calls to direct hardware writes but a
>board only supports Vesa 1.2 and we use a emulator then the emulator
>translates Vesa 2 Calls to Vesa 1.2 and send the information to the
>board that calls direct hardware calls. As you see the emulator spends
>time converting from Vesa 2 to Vesa 1.2

	That last is not true! (this is my opinion, sorry).

Ivan Baldo: baldo AT chasque DOT apc DOT org - http://www.chasque.apc.org/baldo