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/***
*peekpoke.c - Peek or poke absolute memory.
*
* Copyright (c) 1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _peek(), _poke(), and _getvideoaddress().
*
*Revision History:
* 08-21-91 BWM Wrote module.
*
*******************************************************************************/
#include <cruntime.h>
#include <oscalls.h>
#include <stdlib.h>
#include <dos.h>
#if !defined(_DOSX32_)
#error ERROR - ONLY DOSX32 TARGET SUPPORTED!
#endif
/***
*void _peek(src, dst, size) - Peek at memory
*
*Purpose:
*
*Entry:
* _absaddr_t src - address to be peeked
* void * dst - pointer to location to receive copy
* unsigned short size - number of bytes to peek
*
*Exit:
* None
*
*Exceptions:
*
*******************************************************************************/
void _CALLTYPE1 _peek(_absaddr_t aaSrc, void * pvDst, unsigned short cb)
{
PeekAddress((WORD)((aaSrc & 0xffff0000) >> 16),
(WORD) (aaSrc & 0x0000ffff),
pvDst, cb);
}
/***
*void _poke(src, dst, size) - Poke into memory
*
*Purpose:
*
*Entry:
* void * src - pointer to data to be poked
* _absaddr_t dst - address where data will be poked
* unsigned short size - number of bytes to poke
*
*Exit:
* None
*
*Exceptions:
*
*******************************************************************************/
void _CALLTYPE1 _poke(void * pvSrc, _absaddr_t aaDst, unsigned short cb)
{
PokeAddress(pvSrc,
(WORD)((aaDst & 0xffff0000) >> 16),
(WORD) (aaDst & 0x0000ffff), cb);
}
/***
*void _getvideoaddr(region) - Get flat address of video memory
*
*Purpose:
*
*Entry:
* unsigned region - screen memory region:
*
* _ADDR_NO_PALETTE_GRAPHICS - Absolute B800:0000
* _ADDR_PALETTE_GRAPHICS - Absolute A000:0000
* _ADDR_COLOR_TEXT - Absolute B800:0000
* _ADDR_MONO_TEXT - Absolute B000:0000
*
*Exit:
* None
*
*Exceptions:
*
*******************************************************************************/
void * _CALLTYPE1 _getvideoaddr(unsigned dwRegion)
{
return (GetVideoAddress(dwRegion));
}
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