From:	yurick AT oblik DOT dp DOT ua
Newsgroups:	comp.os.msdos.djgpp
Subject:	__djgpp_map_physical_memory - some questions
Date:	Wed, 30 May 2001 21:29:47 +0300
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

       Hi!

   I have some questions about __djgpp_map_physical_memory() function.

1. Info says that all three arguments of this function must be page-aligned.
So must I align all this arguments manually? Is this code correct (see below)?
------------------------------------------------------------------
#define PAGE_SIZE 0x1000
// already aligned
#define MEM_SIZE  0x4000
#define MEM_ADDR  0xeb000000

char *buf=(char*)malloc(MEM_SIZE+PAGE_SIZE);
size_t aligned=(size_t)buf;
aligned=(1+(dptr-1)/PAGE_SIZE)*PAGE_SIZE; // align to PAGE_SIZE

int res=__djgpp_map_physical_memory((char*)aligned, MEM_SIZE, MEM_ADDR);
printf("result: %d\n", res);
------------------------------------------------------------------

2. I've tried this with djgpp 2.03 under Win95OSR2. Is it supports
this call (DPMI 0508)?

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