From: jhorigan AT mipos2 DOT intel DOT com (John Horigan)
Subject: Re: Multiple go32's
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Date: Tue, 16 Mar 93 8:42:29 PST


..

> I vote AGAINST physical mapping of whole video RAM into system's address space,
> because by the end of this year most of PCs will already have 16MB memory
> installed, and this continuous mapping is non-standard feature (although it
> appears in most of modern chipsets).
> 

You're missing the point. Physical mapping of the whole video page will
always have to be optional, 64K video memory banks will always have
to be supported. Also, the 16MB limitation is specific to my
chipset (the Western Digital 90C31), other chipsets probably support
a 32 bit address space, certainly go32v2 should support physical mapping
to any 1MB block regardless of the limitations of individual chipsets,
unsupportable requests would be ignored. People who don't want physical 
mapping can simply disable the feature. 

------------------------------------------------------------------------
John W. Horigan     GRP Engineer   P7 architecture  M/S: RN2-27
Intel, Santa Clara  (408)765-4773  jhorigan AT mipos2 DOT intel DOT com