Date: Thu, 6 Oct 94 09:01:16 -0400
From: Mike Gore <magore AT icr2 DOT uwaterloo DOT ca>
To: djgpp AT sun DOT soe DOT clarkson DOT edu, eliz AT is DOT elta DOT co DOT il
Subject: Re: Q: Memory Access to DOS area running a go32 exec under windows ?

I was asked more detail on my problem so here is a code fragment. Note
that 0xe0000000 offsets also cause the same result... Any help would
be welcome [ I am trying to access a TSR in the DOS memory area ]

/* Test memory access */
#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include <sys/farptr.h>

#define peek16(a) _farpeekw(0,a)
#define poke16(a,b) _farpokew(0,a,b)

main (int argc, char *argv[])
{
        int ret;
        long which = 12;
        ret = peek16(which*4);
        printf("Result: %x\n", ret);
}

/* Result is same for a bias of 0xe0000000

C:\LIBGNU>go32 test1
go32 version 1.12.maint2 Copyright (C) 1994 DJ Delorie
General Protection Fault at eip=1c2
eax=00000000 ebx=00051d18 ecx=00000000 edx=00000030 esi=00000000 edi=00000000
ebp=00051d04 esp=00051d04 cs=af ds=a7 es=a7 fs=0 gs=bf ss=b7 cr2=00001fe3
Call frame traceback EIPs:
  0x000001c2
*/