diff options
Diffstat (limited to 'reference/C/CONTRIB/SNIP/noctrlc.c')
| -rwxr-xr-x | reference/C/CONTRIB/SNIP/noctrlc.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/noctrlc.c b/reference/C/CONTRIB/SNIP/noctrlc.c new file mode 100755 index 0000000..bbc8649 --- /dev/null +++ b/reference/C/CONTRIB/SNIP/noctrlc.c @@ -0,0 +1,63 @@ +/****************************************************************/
+/* Name: noctrl() */
+/* Desc: captures interrput 9 so as to ignore ctrl-c,ctrl-break,*/
+/* ctrl-alt-del */
+/****************************************************************/
+
+#include <dos.h>
+
+#if defined(__ZTC__)
+ #define INTERRUPT
+ #define FAR _far
+ #define ENABLE int_on
+ #define INPORTB inp
+ #define OUTPORTB outp
+#else
+ #include <conio.h>
+ #if defined(__TURBOC__)
+ #define INTERRUPT interrupt
+ #define FAR far
+ #define ENABLE enable
+ #define INPORTB inportb
+ #define OUTPORTB outportb
+ #else
+ #define INTERRUPT _interrupt
+ #define FAR _far
+ #define ENABLE _enable
+ #define INPORTB inp
+ #define OUTPORTB outp
+ #endif
+#endif
+
+extern void (INTERRUPT FAR *oldint9)(void); /* Caller must set this */
+
+void INTERRUPT FAR noctrl(void)
+{
+ unsigned char byte;
+ static int flag;
+
+ ENABLE();
+
+ if ((byte = (unsigned char)INPORTB(0x60)) == 29)
+ flag = 1;
+
+ if (byte == 157)
+ flag = 0;
+
+ if (!flag)
+ (*oldint9)();
+ else switch (byte)
+ {
+ case 46 : /* yeah, these should be #defined! */
+ case 70 :
+ case 56 :
+ case 83 :
+ byte = (unsigned char)INPORTB(0x61);
+ OUTPORTB(0x61,byte | 0x80);
+ OUTPORTB(0x61,byte);
+ OUTPORTB(0x20,0x20);
+ break;
+ default :
+ (*oldint9)();
+ }
+}
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