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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.mac.programmer
Subject: Re: New SetDepth call
Keywords: System 6.0.5, Graphics Devices Manager
Message-ID: <1990Jul27.133539.25998@eng.umd.edu>
Date: 27 Jul 90 13:35:39 GMT
References: <1990Jul26.183633.10926@portia.Stanford.EDU>
Sender: news@eng.umd.edu (The News System)
Organization: College of Engineering, Maryversity of Uniland, College Park
Lines: 19

In article <1990Jul26.183633.10926@portia.Stanford.EDU> rick@jessica.Stanford.EDU (Rick Wong) writes:
>Tech Note 276 details a new call available in System 6.0.5 to set the
>bit-depth of a device, called SetDepth.

>pascal short SetDepth(GDHandle gd, short newDepth,
>    short whichFlags, short newFlags)
>    = {0x203C, 0x000A, 0x0013, 0xAB1D};
>
>#define    kSysEnvVersion    1
>#define    kSystem6_0_5    0x0605

>    if (gWorld.systemVersion >= kSystem6_0_5 && gWorld.hasColorQD)    {

Do you have 32-bit Quickdraw installed?  'AB1D' is a trap implemented by
32-bit quickdraw, not (I don't think) System 6.05 itself.
--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
][, ][+, ///, ///+, //e, //c, IIGS, //c+ --- Any questions?
		Hey!  Bush has NO LIPS!