projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 08be3b19 WN |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * William Jolitz. | |
| 7 | * | |
| 8 | * %sccs.include.noredist.c% | |
| 9 | * | |
| 10 | * @(#)wdreg.h 5.1 (Berkeley) %G% | |
| 11 | */ | |
| 12 | ||
| 13 | ||
| 14 | /* | |
| 15 | * Disk Controller register definitions. | |
| 16 | */ | |
| 17 | #define wd_data 0x0 /* data register (R/W - 16 bits) */ | |
| 18 | #define wd_error 0x1 /* error register (R) */ | |
| 19 | #define wd_precomp wd_error /* write precompensation (W) */ | |
| 20 | #define wd_seccnt 0x2 /* sector count (R/W) */ | |
| 21 | #define wd_sector 0x3 /* first sector number (R/W) */ | |
| 22 | #define wd_cyl_lo 0x4 /* cylinder address, low byte (R/W) */ | |
| 23 | #define wd_cyl_hi 0x5 /* cylinder address, high byte (R/W)*/ | |
| 24 | #define wd_sdh 0x6 /* sector size/drive/head (R/W)*/ | |
| 25 | #define wd_command 0x7 /* command register (W) */ | |
| 26 | #define wd_status wd_command /* immediate status (R) */ | |
| 27 | ||
| 28 | #define wd_altsts 0x206 /*alternate fixed disk status(via 1015) (R)*/ | |
| 29 | #define wd_ctlr 0x206 /*fixed disk controller control(via 1015) (W)*/ | |
| 30 | #define wd_digin 0x207 /* disk controller input(via 1015) (R)*/ | |
| 31 | ||
| 32 | /* | |
| 33 | * Status Bits. | |
| 34 | */ | |
| 35 | #define WDCS_BUSY 0x80 /* Controller busy bit. */ | |
| 36 | #define WDCS_READY 0x40 /* Selected drive is ready */ | |
| 37 | #define WDCS_WRTFLT 0x20 /* Write fault */ | |
| 38 | #define WDCS_SEEKCMPLT 0x10 /* Seek complete */ | |
| 39 | #define WDCS_DRQ 0x08 /* Data request bit. */ | |
| 40 | #define WDCS_ECCCOR 0x04 /* ECC correction made in data */ | |
| 41 | #define WDCS_INDEX 0x02 /* Index pulse from selected drive */ | |
| 42 | #define WDCS_ERR 0x01 /* Error detect bit. */ | |
| 43 | ||
| 44 | #define WDCS_BITS "\020\010busy\006rdy\006wrtflt\005seekdone\004drq\003ecc_cor\002index\001err" | |
| 45 | ||
| 46 | #define WDERR_BITS "\020\010badblk\007uncorr\006id_crc\005no_id\003abort\002tr000\001no_dam" | |
| 47 | ||
| 48 | /* | |
| 49 | * Commands for Disk Controller. | |
| 50 | */ | |
| 51 | #define WDCC_READ 0x20 /* disk read code */ | |
| 52 | #define WDCC_WRITE 0x30 /* disk write code */ | |
| 53 | #define WDCC_RESTORE 0x10 /* disk restore code -- resets cntlr */ | |
| 54 | #define WDCC_FORMAT 0x50 /* disk format code */ | |
| 55 | ||
| 56 | #define WD_STEP 0 /* winchester- default 35us step */ | |
| 57 | ||
| 58 | #define WDSD_IBM 0xa0 /* forced to 512 byte sector, ecc */ | |
| 59 |