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
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Message-ID: <5e54vt$pp1@news.cableinet.net>
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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.