From:	jb3207 AT eclipse DOT co DOT uk (Jason Barstow)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: VBE 2.0 Pmode Bank Switching...
Date:	Sat, 15 Feb 1997 20:02:43 GMT
Organization:	Jabber Interactive
Lines:	16
Message-ID:	<5e54vt$pp1@news.cableinet.net>
References:	<Pine DOT SUN DOT 3 DOT 95 DOT 970208215834 DOT 13653A-100000 AT linknet DOT kitsap DOT lib DOT wa DOT us> <o9ZZ4BAs0j$yEw+O AT talula DOT demon DOT co DOT uk>
Reply-To:	jb3207 AT eclipse DOT co DOT uk
NNTP-Posting-Host:	p10.callisto.eclipse.co.uk
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

>Also, some cards use memory-mapped IO, in which case you have to create
>a pmode selector for accessing the required addresses, and put it in %es
>before calling the switch routine. You can determine if this is the case
>by looking at the IOPrivInfo field in the PM_INFO structure.

Can you give an example of a card that uses MMIO?
I've written the MMIO bank switch routines but I'm still using
the old INT method until I get a chance to test it out.

Also, is it only the bank swith code that requires %es?
I don't remember seeing MMIO alternatives for other VESA
functions.

Thanks,
Jason.

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