Memory block at specified physical address

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#16375

From: Roelof Steyn
Date: Tue, 20 May 2003 06:03

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Hi

I need to assign a block of memory at a specified address in physical memory
(I'm using dual port RAM on an EISA card).
I need to do something like this:
#define BufSize 2048
#define Address 0xB8000
volatile WORD *mem = malloc(BufSize,Address);
Can anybody help?
I'm working on Win2000.

I have tried doing this:
  volatile WORD *mem[BufSize];
  for(int i=0; i<BufSize; i++)
  {
   (int*)AA[i] = (int*)(Address + i*2); // Assign address
   *(AA[i])    = 0x0000; // Initialize to 0
  }

Problems with this:
1. I'm not confident that Win2000 assigned this block to actual, real
physical address B8000.
2. It works OK, until I quit the program, then I get the error "Invalid
pointer operation" - how do I "free" this memory block?

Thanks!

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