57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
|
/* const.h - constants for db.
|
||
|
|
*
|
||
|
|
* $Id: const.h,v 1.0 1990/10/06 12:00:00 cwr Exp cwr $
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* general constants */
|
||
|
|
#define FALSE 0
|
||
|
|
#undef NULL
|
||
|
|
#define NULL 0
|
||
|
|
#define TRUE 1
|
||
|
|
|
||
|
|
/* C tricks */
|
||
|
|
#define EXTERN extern
|
||
|
|
#define FORWARD static
|
||
|
|
#define PRIVATE static
|
||
|
|
#define PUBLIC
|
||
|
|
|
||
|
|
/* ASCII codes */
|
||
|
|
#define CAN 24
|
||
|
|
#define CR 13
|
||
|
|
#define EOF (-1)
|
||
|
|
#define LF 10
|
||
|
|
#define XOFF 19
|
||
|
|
|
||
|
|
/* hardware processor-specific for 8088 through 80386 */
|
||
|
|
#ifndef HCLICK_SIZE
|
||
|
|
#define HCLICK_SIZE 0x10
|
||
|
|
#endif
|
||
|
|
#define IF 0x0200 /* interrupt disable bit in flags */
|
||
|
|
#define INT_BREAKPOINT 0xCC /* byte for breakpoint interrupt */
|
||
|
|
#define LINEARADR(seg, off) \
|
||
|
|
(HCLICK_SIZE * (physoff_t) (segment_t) (seg) + (off))
|
||
|
|
#define TF 0x0100 /* trap bit in flags */
|
||
|
|
|
||
|
|
/* hardware processor-specific for 80386 and emulated for others */
|
||
|
|
#define BS 0x4000 /* single-step bit in dr6 */
|
||
|
|
|
||
|
|
/* use hardware codes for segments for simplest decoding */
|
||
|
|
#define CSEG 0x2E /* 8088 through 80386 */
|
||
|
|
#define DSEG 0x3E
|
||
|
|
#define ESEG 0x26
|
||
|
|
#define FSEG 0x64
|
||
|
|
#define GSEG 0x65 /* 80386 only */
|
||
|
|
#define SSEG 0x36
|
||
|
|
|
||
|
|
/* software machine-specific for PC family */
|
||
|
|
#define BIOS_DATA_SEG 0x40
|
||
|
|
# define KB_FLAG 0x17 /* offset to 16-bits of keyboard shift flags */
|
||
|
|
|
||
|
|
/* switches to handle non-conforming compilers */
|
||
|
|
#define UCHAR_BUG /* compiler converts unsigned chars wrong */
|
||
|
|
|
||
|
|
#ifdef UCHAR_BUG
|
||
|
|
# define UCHAR(x) ((x) & 0xFF)
|
||
|
|
#endif
|
||
|
|
|