From: Tim Newsham <newsham@lava.net>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] vga and vmware
Date: Mon, 17 Aug 2009 08:30:10 -1000 [thread overview]
Message-ID: <Pine.BSI.4.64.0908170828060.12479@malasada.lava.net> (raw)
In-Reply-To: <8d5e7486d802dd452d2f54d3b2dc1039@quanstro.net>
>> /dev/vgactl says 0xe0000000 has 0x3c0000 mapped. Enough for
>> 1024x768x4 bytes but not enoug hfor 1280x1024x4 bytes. I
>> patched vgavmware.c line 179 to allocate 2*vmrd(vm, Rfbsize)
>> instead of vmrd(vm, Rfbsize) and now I'm able to go into 1280x1024x8
[...]
> why would 8 bit color require 4 bytes-per-pixel?
I don't know. I just know that the libdraw primitives were
going off the edge of allocated memory and the ctl file said
something about "x8r8g8b8" so I got out the calculator and
noticed that if there are 4 bytes per pixel then I would
expect 1024x768 to fit and 1280x1024 not to. I plead ignorance
on how the plan9 vga system is actually set up.
> - erik
Tim Newsham
http://www.thenewsh.com/~newsham/
prev parent reply other threads:[~2009-08-17 18:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-16 20:35 Tim Newsham
2009-08-17 0:23 ` Devon H. O'Dell
2009-08-17 2:41 ` Tim Newsham
2009-08-17 13:39 ` erik quanstrom
2009-08-17 18:30 ` Tim Newsham [this message]
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