J56QC@CUNYVM.BITNET (02/06/91)
This may sound stupid but I have been using CAPE2.5 for about 6 months and I'm
lways stuck with something.. this something is CNOP,, could someone out there h
lp me understand what CNOP actually does!!..I really don't know when to use it.
so any help would be great thanks!!! :)
James T. Romano
o o
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\___________/markv@kuhub.cc.ukans.edu (02/08/91)
In article <91037.084243J56QC@CUNYVM.BITNET>, J56QC@CUNYVM.BITNET writes: This may sound stupid but I have been using CAPE2.5 for about 6 months and I'm >lways stuck with something..this something is CNOP,, could someone out there h >lp me understand what CNOP actually does!!..Ireally don't know when to use it. > so any help would be great thanks!!! :) CNOP stands for Conditional NOP. It can be used for aligning code or data to a particular boundry. In the form most commonly used, you say: CNOP 0, X Where x is the alignment you want in bytes (ie: 2 for word, 4 for longword, 8 for double longword). It will generate NOP instructions if needed to pad out to this boundry. On 68000 machines non-byte sized values need to be at word boundries, DOS stuff needs to be at long word boundries, so you can do things like: String1: DC.B "This is a string I dont care how long",0 CNOP 0,2 Int1: DS.L 1 ;This needs to be word aligned. CNOP 0,4 BSTR: DS.B 255 ;This needs to be longword aligned. Get it? -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mark Gooderum Only... \ Good Cheer !!! Academic Computing Services /// \___________________________ University of Kansas /// /| __ _ Bix: mgooderum \\\ /// /__| |\/| | | _ /_\ makes it Bitnet: MARKV@UKANVAX \/\/ / | | | | |__| / \ possible... Internet: markv@kuhub.cc.ukans.edu ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~