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From: siegel@endor.harvard.edu (Rich Siegel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Casting Integer to SignedByte in THINK Pascal
Message-ID: <2806@husc6.harvard.edu>
Date: 9 Oct 89 19:52:35 GMT
References: <5728@tank.uchicago.edu>
Sender: news@husc6.harvard.edu
Reply-To: siegel@endor.UUCP (Rich Siegel)
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Organization: Symantec Language Products Group
Lines: 34

In article <5728@tank.uchicago.edu> gft_robert@gsbacd.uchicago.edu writes:
>
>I want to write out an integer to a specific location in memory, something like
>this:
>

	If you want to write out two bytes, then

	var p : ^Integer;

	p := Pointer(addr);
	p^ := i;

	is the way to do it. They way you wrote it, the high byte of your
value will get written out; there will be no range violation, because the
high byte will never have a value bigger than $FF. At any rate, SignedByte
is not 0..255, it's -127..128, or $ff..$80.

R.




~~~~~~~~~~~~~~~
 Rich Siegel
 Staff Software Developer
 Symantec Corporation, Language Products Group
 Internet: siegel@endor.harvard.edu
 UUCP: ..harvard!endor!siegel

"There is no personal problem which cannot be solved by sufficient
application of high explosives."

~~~~~~~~~~~~~~~