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Article #8981Re: Another question on the 80286- er, 68000 memory models
From: Michael
Date: Thu, 26 May 1988 05:26
Date: Thu, 26 May 1988 05:26
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1533 bytes
In article <2869@polya.STANFORD.EDU> rokicki@polya.Stanford.EDU (Tomas G. Rokicki) writes: > Always use 16-bit relative; no sense not to, since > the long ones are taken care of automatically, and > smaller code size is usually good. Again, in IF you are passing pointers to functions and using them for comparisons, THEN you should (must?) use LARGE CODE model. (At least for large programs) Reason: Otherwise, you will be comparing the address of the jump table in some cases with the address of the routine itself in other cases. (The pointer will still be 32 bits, but if you are close to the routine you will get a pointer to the code, while if you are far, you will get a pointer to the jump table. At least this was true in the past, and I think its still true, never did check recently) : --- : Michael Gersten uunet.uu.net!denwa!stb!michael : ihnp4!hermix!ucla-an!denwa!stb!michael : sdcsvax!crash!gryphon!denwa!stb!michael : "Machine Takeover? Just say no." : "Sockets? Just say no." <-- gasoline
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att!ihnp4!cbmvax!vu-vlsi!devon!stb!michael From: michael@stb.UUCP (Michael) Newsgroups: comp.sys.amiga.tech Subject: Re: Another question on the 80286- er, 68000 memory models Message-ID: <10354@stb.UUCP> Date: 26 May 88 05:26:41 GMT References: <8805182223.AA20918@cory.Berkeley.EDU> <2653@louie.udel.EDU> <2869@polya.STANFORD.EDU> Reply-To: michael@stb.UUCP (Michael) Organization: STB BBS, La, Ca, Usa, +1 213 459 7231 Lines: 20