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- Newsgroups: comp.sys.ibm.ps2.hardware
- Path: sparky!uunet!seas.gwu.edu!ilan
- From: ilan@seas.gwu.edu (Ilan Berkner)
- Subject: Re: XGA Questions
- Message-ID: <1992Nov6.135405.25824@seas.gwu.edu>
- Sender: news@seas.gwu.edu
- Organization: George Washington University
- References: <AeyTfY600iUxE_=bZI@andrew.cmu.edu>
- Date: Fri, 6 Nov 1992 13:54:05 GMT
- Lines: 32
-
- In article <AeyTfY600iUxE_=bZI@andrew.cmu.edu> sl31+@andrew.cmu.edu (Stephen M. Lacy) writes:
- >really don't know about it, and I do know that its not supported on any
- >of the 85xx and 95xx monitors.
-
- I get mixed reports on this one. I thought the XGA-2 can work with the
- 8513, but only at a max resolution of 640x480x256.
-
-
- >I've got an XGA-2 on order, I'll let you all know when it gets in.
-
- I'd like to know whether there is a difference between these two
- routines on an XGA-2:
-
- mov ax,0b800h
- mov es,ax
- mov cx,4000 shr 2
- mov di,0
- mov eax,0
- rep stosd
-
- and:
-
- mov ax,0b800h
- mov es,ax
- mov cx,4000 shr 1
- mov di,0
- mov ax,0
- rep stosw
-
- The first one clears the screen in 32-bit chunks. The second one does it
- in 16-bit chunks. This code might need some fine-tuning, but you get
- the idea.
-