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pun.h
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C/C++ Source or Header
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1993-11-25
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1KB
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37 lines
/* This file defines the pun_info structure used in several kinds of hard disk
* driver software. Basically it gives info for the first 16 bios drives.
* Since it gives physical partition starts it's rather useful. Only snag is
* the 'first 16 bios drives' bit.
*/
#define MAXUNITS 16
struct pun_info {
unsigned short puns; /* Number of HD's */
unsigned char pun[MAXUNITS]; /* AND with masks below: */
#define PUN_DEV 0x1f /* device number of HD */
/* Note: I think this is right. It is a bit mask for the bits of 'pun' which
* refer to a device. Bits 0-2 are unit number, bit 3=0 for ACSI bus and 1 for
* TT SCSI bus. Device numbers 0x10, (and possibly 0x11) are for Falcon IDE
* bus and maybe third party IDE interfaces too. So it looks like bits 0-4 are
* used for now; so a mask of 0x1f is used. Bit 6 means 'removable'.
*/
#define PUN_UNIT 0x7 /* Unit number */
#define PUN_SCSI 0x8 /* 1=SCSI 0=ACSI */
#define PUN_IDE 0x10 /* Falcon IDE */
#define PUN_REMOVABLE 0x40 /* Removable media */
#define PUN_VALID 0x80 /* zero if valid */
long partition_start[MAXUNITS];
long cookie; /* 'AHDI' if following valid */
long *cookie_ptr; /* Points to 'cookie' */
unsigned short version_num; /* AHDI version */
unsigned short max_sect_siz; /* Max logical sec size */
long reserved[16]; /* Reserved */
};
#define PUN_PTR (*((struct pun_info **)0x516))