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Re: video mem access with oskit-mach


From: Roland McGrath
Subject: Re: video mem access with oskit-mach
Date: Wed, 3 Oct 2001 16:09:37 -0400 (EDT)

> MiG doesn't know unsigned short, so I am afraid that I have to use int.

MiG is indeed pretty unhelpful, though there is a MACH_MSG_TYPE_INTEGER_16
code.

> The conversion from signed shorts to unsigned shorts is implementation
> defined (or can raise a signal even), so I am out of luck here  (unless we
> forbid ports higher than 7fff).

Say what?  Conversions from one bitpattern (integer) type to another
bitpattern type of the same size are always fine.



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