Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!apple!keith
From: keith@Apple.COM (Keith Rollin)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Isn't there an OpenResFile where you supply a VRe
Keywords: OpenResFile HOpenResFile
Message-ID: <52221@apple.Apple.COM>
Date: 1 May 91 01:45:25 GMT
References: <1655@babcock.cerc.wvu.wvnet.edu> <1991Apr30.070640.744@husc3.harvard.edu>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 24

In article <1991Apr30.070640.744@husc3.harvard.edu> wysocki@husc9.harvard.edu (Christopher Wysocki) writes:
>In article <1655@babcock.cerc.wvu.wvnet.edu> un020070@vaxa.wvnet.edu writes:
>
>>If there is such a procedure, when was it introduced?  With
>>the MacPlus ROM?
>
>HOpenResFile is implemented as a glue routine with THINK C, so I'm not sure if
>it is in the 128k ROM found in the Mac Plus.  I do believe that it is in the
>ROM of the Mac II and later machines, though.

HOpenResFile was first implemented as glue in MPW 3.0. Symantec incorporated
it into their THINK products soon after.

HOpenResFile is not in any ROM. However, there is a trap number
allocated for it. The glue checks to see if that trap is implemented.
If it is, the glue calls it. If not, the glue emulates it.


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