Path: utzoo!mnetor!uunet!husc6!bloom-beacon!mit-eddie!rutgers!mtunx!whuts!homxb!antique!cjp
From: cjp@antique.UUCP (Charles Poirier)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Memory Types???
Message-ID: <2187@antique.UUCP>
Date: 19 Apr 88 23:10:52 GMT
References: <8804182055.AA15423@cory.Berkeley.EDU>
Reply-To: cjp@vax135.UUCP (Charles Poirier)
Organization: AT&T Bell Labs, Holmdel, NJ
Lines: 33
Summary: Sort of

In article <8804182055.AA15423@cory.Berkeley.EDU> dillon@CORY.BERKELEY.EDU.UUCP writes:
|:    Can someone please tell me the proper memory nomenclature?  What I want to
|:define are three different catagories of memory request:
|:
|:                CHIP   :   must be chip memory.
|
|	ptr = AllocMem(bytes, MEMF_PUBLIC|MEMF_CHIP);
|:
|:                FAST   :   must be fast memory.
|:
|	ptr = AllocMem(bytes, MEMF_PUBLIC|MEMF_FAST);

Huh?  What I understood was that this construct gives the same result
as the request below without MEMF_FAST, giving CHIP when insufficient
FAST is available.  One solution (suboptimal, but hey) would be to
request MEMF_FAST, then check the returned pointer with TypeOfMem()
(sp?  was just recently the subject of a posting), and if it's CHIP,
FreeMem it and fail.  You'd want to think carefully about using this,
as many Amigas have only CHIP memory.

By the way, did Matt really mean to imply that *every* AllocMem should
ask for MEMF_PUBLIC?

|:                FSCH   :   fast if possible, if not the chip if possible.
|
|	ptr = AllocMem(bytes, MEMF_PUBLIC);
|
|	I.E. EXEC searches for space in fast memory before chip memory.

-- 
	Charles Poirier   (decvax,ihnp4,attmail)!vax135!cjp

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