CS/80 disc geometry

[Al Kossow]

To (partially) answer my own question, there is some info in the NETBSD rd 
driver. (rd.h and rd.c)

I guess no one has tried coding up a SS-80 or CS-80 drive simulator yet..


rd.c

/*
  * Misc. HW description, indexed by sc_type.
  * Used for mapping 256-byte sectors for 512-byte sectors
  */
const struct rdidentinfo {
	u_int16_t ri_hwid;		/* 2 byte HW id */
	u_int16_t ri_maxunum;		/* maximum allowed unit number */
	char	*ri_desc;		/* drive type description */
	int	ri_nbpt;		/* DEV_BSIZE blocks per track */
	int	ri_ntpc;		/* tracks per cylinder */
	int	ri_ncyl;		/* cylinders per unit */
	int	ri_nblocks;		/* DEV_BSIZE blocks on disk */
} rdidentinfo[] = {
	{ RD7946AID,	0,	"7945A",	NRD7945ABPT,
	  NRD7945ATRK,	968,	 108416 },

	{ RD9134DID,	1,	"9134D",	NRD9134DBPT,
	  NRD9134DTRK,	303,	  29088 },

	{ RD9134LID,	1,	"9122S",	NRD9122SBPT,
	  NRD9122STRK,	77,	   1232 },

	{ RD7912PID,	0,	"7912P",	NRD7912PBPT,
	  NRD7912PTRK,	572,	 128128 },

	{ RD7914PID,	0,	"7914P",	NRD7914PBPT,
	  NRD7914PTRK,	1152,	 258048 },

	{ RD7958AID,	0,	"7958A",	NRD7958ABPT,
	  NRD7958ATRK,	1013,	 255276 },

	{ RD7957AID,	0,	"7957A",	NRD7957ABPT,
	  NRD7957ATRK,	1036,	 159544 },

	{ RD7933HID,	0,	"7933H",	NRD7933HBPT,
	  NRD7933HTRK,	1321,	 789958 },

	{ RD9134LID,	1,	"9134L",	NRD9134LBPT,
	  NRD9134LTRK,	973,	  77840 },

	{ RD7936HID,	0,	"7936H",	NRD7936HBPT,
	  NRD7936HTRK,	698,	 600978 },

	{ RD7937HID,	0,	"7937H",	NRD7937HBPT,
	  NRD7937HTRK,	698,	1116102 },

	{ RD7914CTID,	0,	"7914CT",	NRD7914PBPT,
	  NRD7914PTRK,	1152,	 258048 },

	{ RD7946AID,	0,	"7946A",	NRD7945ABPT,
	  NRD7945ATRK,	968,	 108416 },

	{ RD9134LID,	1,	"9122D",	NRD9122SBPT,
	  NRD9122STRK,	77,	   1232 },

	{ RD7957BID,	0,	"7957B",	NRD7957BBPT,
	  NRD7957BTRK,	1269,	 159894 },

	{ RD7958BID,	0,	"7958B",	NRD7958BBPT,
	  NRD7958BTRK,	786,	 297108 },

	{ RD7959BID,	0,	"7959B",	NRD7959BBPT,
	  NRD7959BTRK,	1572,	 594216 },

	{ RD2200AID,	0,	"2200A",	NRD2200ABPT,
	  NRD2200ATRK,	1449,	 654948 },

	{ RD2203AID,	0,	"2203A",	NRD2203ABPT,
	  NRD2203ATRK,	1449,	1309896 }
};

rd.h/* HW ids */
#define	RD7946AID	0x220	/* also 7945A */
#define	RD9134DID	0x221	/* also 9122S */
#define	RD9134LID	0x222	/* also 9122D */
#define	RD7912PID	0x209
#define RD7914CTID	0x20A
#define	RD7914PID	0x20B
#define	RD7958AID	0x22B
#define RD7957AID	0x22A
#define	RD7933HID	0x212
#define	RD7936HID	0x213	/* just guessing -- as of yet unknown */
#define	RD7937HID	0x214
#define RD7957BID	0x22C	/* another guess based on 7958B */
#define RD7958BID	0x22D
#define RD7959BID	0x22E	/* another guess based on 7958B */
#define RD2200AID	0x22F
#define RD2203AID	0x230	/* yet another guess */

/* SW ids -- indicies into rdidentinfo, order is arbitrary */
#define	RD7945A		0
#define	RD9134D		1
#define	RD9122S		2
#define	RD7912P		3
#define	RD7914P		4
#define	RD7958A		5
#define RD7957A		6
#define	RD7933H		7
#define	RD9134L		8
#define	RD7936H		9
#define	RD7937H		10
#define RD7914CT	11
#define RD7946A		12
#define RD9122D		13
#define RD7957B		14
#define RD7958B		15
#define RD7959B		16

#define	NRD7945ABPT	16
#define	NRD7945ATRK	7
#define	NRD9134DBPT	16
#define	NRD9134DTRK	6
#define	NRD9122SBPT	8
#define	NRD9122STRK	2
#define	NRD7912PBPT	32
#define	NRD7912PTRK	7
#define	NRD7914PBPT	32
#define	NRD7914PTRK	7
#define	NRD7933HBPT	46
#define	NRD7933HTRK	13
#define	NRD9134LBPT	16
#define	NRD9134LTRK	5

/*
  * Several HP drives have an odd number of 256 byte sectors per track.
  * This makes it rather difficult to break them into 512 and 1024 byte blocks.
  * So...we just do like HPUX and don't bother to respect hardware track/head
  * boundries -- we just mold the disk so that we use the entire capacity.
  * HPUX also sometimes doesn't abide by cylinder boundries, we attempt to
  * whenever possible.
  *
  * DISK		REAL (256 BPS)		HPUX (1024 BPS)		BSD (512 BPS)
  * 		SPT x HD x CYL		SPT x HD x CYL		SPT x HD x CYL
  * -----	---------------		---------------		--------------
  * 7936:	123 x  7 x 1396		 25 x  7 x 1716		123 x  7 x  698
  * 7937:	123 x 13 x 1396		 25 x 16 x 1395		123 x 13 x  698
  *
  * 7957A:	 63 x  5 x 1013		 11 x  7 x 1036		 22 x  7 x 1036
  * 7958A:	 63 x  8 x 1013		 21 x  6 x 1013		 36 x  7 x 1013
  *
  * 7957B:	 63 x  4 x 1269		  9 x  7 x 1269		 18 x  7 x 1269
  * 7958B:	 63 x  6 x 1572		 21 x  9 x  786		 42 x  9 x  786
  * 7959B:	 63 x 12 x 1572		 21 x  9 x 1572		 42 x  9 x 1572
  *
  * 2200A:	113 x  8 x 1449		113 x  2 x 1449		113 x  4 x 1449
  * 2203A:	113 x 16 x 1449		113 x  4 x 1449		113 x  8 x 1449
  */
#define	NRD7936HBPT	123
#define	NRD7936HTRK	7
#define	NRD7937HBPT	123
#define	NRD7937HTRK	13
#define	NRD7957ABPT	22
#define	NRD7957ATRK	7
#define	NRD7958ABPT	36
#define	NRD7958ATRK	7
#define	NRD7957BBPT	18
#define	NRD7957BTRK	7
#define	NRD7958BBPT	42
#define	NRD7958BTRK	9
#define	NRD7959BBPT	42
#define	NRD7959BTRK	9
#define	NRD2200ABPT	113
#define	NRD2200ATRK	4
#define	NRD2203ABPT	113
#define	NRD2203ATRK	8