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From: sverrehu@ifi.uio.no (Sverre H Huseby)
Newsgroups: comp.os.msdos.programmer,comp.sys.ibm.pc.misc
Subject: 386 and EGA-card
Message-ID: <CMM.0.88.663249658.sverrehu@ome.ifi.uio.no>
Date: 7 Jan 91 12:00:58 GMT
Sender: sverrehu@ifi.uio.no (Sverre Holmsen Huseby)
Organization: Dept. of Informatics, University of Oslo, Norway
Lines: 27
Nntp-Posting-Host: ome.ifi.uio.no
Originator: sverrehu@ome.ifi.uio.no

I have tried clearing the EGA graphics screen (mode 10h)
in the following two ways:

    8086:
      xor ax, ax
      mov cx, NUM_BYTES / 2
      rep stosw

    80386:
      xor eax, eax
      mov cx, NUM_BYTES / 4
      rep stosd

The 386-routine takes almost the same amount of time as
does the 8086-routine.

Why???





Sverre.

----------------------------------------
Sverre H. Huseby   (sverrehu@ifi.uio.no)
Student   -   University of Oslo, Norway