File: msc_peek.c

package info (click to toggle)
c-cpp-reference 2.0.2-6
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k, lenny
  • size: 8,012 kB
  • ctags: 4,612
  • sloc: ansic: 26,960; sh: 11,014; perl: 1,854; cpp: 1,324; asm: 1,239; python: 258; makefile: 115; java: 77; awk: 34; csh: 9
file content (48 lines) | stat: -rwxr-xr-x 929 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
/*
**  For MSC which lacks these very basic (sic) functions
**
**  public domain by Bob Stout
*/

#include <dos.h>

#ifndef MK_FP
 #define MK_FP(seg,offset) \
        ((void _far *)(((unsigned long)(seg)<<16) | (unsigned)(offset)))
#endif

unsigned char peekb(unsigned seg, unsigned ofs)
{
        unsigned char _far *ptr;

        FP_SEG(ptr) = seg;
        FP_OFF(ptr) = ofs;
        return *ptr;
}

unsigned peek(unsigned seg, unsigned ofs)
{
        unsigned _far *ptr;

        FP_SEG(ptr) = seg;
        FP_OFF(ptr) = ofs;
        return *ptr;
}

void pokeb(unsigned seg, unsigned ofs, unsigned char ch)
{
        unsigned char _far *ptr;

        FP_SEG(ptr) = seg;
        FP_OFF(ptr) = ofs;
        *ptr = ch;
}

void poke(unsigned seg, unsigned ofs, unsigned num)
{
        unsigned _far *ptr;

        FP_SEG(ptr) = seg;
        FP_OFF(ptr) = ofs;
        *ptr = num;
}