diff options
Diffstat (limited to 'sys/dev/ic')
-rw-r--r-- | sys/dev/ic/nec765.h | 72 |
1 files changed, 68 insertions, 4 deletions
diff --git a/sys/dev/ic/nec765.h b/sys/dev/ic/nec765.h index 1895db7..9f93b70 100644 --- a/sys/dev/ic/nec765.h +++ b/sys/dev/ic/nec765.h @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * from: @(#)nec765.h 7.1 (Berkeley) 5/9/91 - * $Id$ + * $Id: nec765.h,v 1.2 1993/10/16 13:48:50 rgrimes Exp $ */ /* @@ -47,26 +47,90 @@ #define NE7_RQM 0x80 /* Diskette Controller ReQuest for Master */ /* Status register ST0 */ -#define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005drv_chck\004drive_rdy\003top_head" +#define NE7_ST0BITS "\020\010invld\007abnrml\006seek_cmplt\005equ_chck\004drive_notrdy\003top_head" + +#define NE7_ST0_IC 0xc0 /* interrupt completion code */ + +#define NE7_ST0_IC_RC 0xc0 /* terminated due to ready changed, n/a */ +#define NE7_ST0_IC_IV 0x80 /* invalid command; must reset FDC */ +#define NE7_ST0_IC_AT 0x40 /* abnormal termination, check error stat */ +#define NE7_ST0_IC_NT 0x00 /* normal termination */ + +#define NE7_ST0_SE 0x20 /* seek end */ +#define NE7_ST0_EC 0x10 /* equipment check, recalibrated but no trk0 */ +#define NE7_ST0_NR 0x08 /* not ready (n/a) */ +#define NE7_ST0_HD 0x04 /* upper head selected */ +#define NE7_ST0_DR 0x03 /* drive code */ /* Status register ST1 */ #define NE7_ST1BITS "\020\010end_of_cyl\006bad_crc\005data_overrun\003sec_not_fnd\002write_protect\001no_am" +#define NE7_ST1_EN 0x80 /* end of cylinder, access past last record */ +#define NE7_ST1_DE 0x20 /* data error, CRC fail in ID or data */ +#define NE7_ST1_OR 0x10 /* DMA overrun, DMA failed to do i/o quickly */ +#define NE7_ST1_ND 0x04 /* no data, sector not found or CRC in ID f. */ +#define NE7_ST1_NW 0x02 /* not writeable, attempt to violate WP */ +#define NE7_ST1_MA 0x01 /* missing address mark (in ID or data field)*/ + /* Status register ST2 */ #define NE7_ST2BITS "\020\007ctrl_mrk\006bad_crc\005wrong_cyl\004scn_eq\003scn_not_fnd\002bad_cyl\001no_dam" +#define NE7_ST2_CM 0x40 /* control mark; found deleted data */ +#define NE7_ST2_DD 0x20 /* data error in data field, CRC fail */ +#define NE7_ST2_WC 0x10 /* wrong cylinder, ID field mismatches cmd */ +#define NE7_ST2_SH 0x08 /* scan equal hit */ +#define NE7_ST2_SN 0x04 /* scan not satisfied */ +#define NE7_ST2_BC 0x02 /* bad cylinder, cylinder marked 0xff */ +#define NE7_ST2_MD 0x01 /* missing address mark in data field */ + /* Status register ST3 */ #define NE7_ST3BITS "\020\010fault\007write_protect\006drdy\005tk0\004two_side\003side_sel\002" +#define NE7_ST3_FT 0x80 /* fault; PC: n/a */ +#define NE7_ST3_WP 0x40 /* write protected */ +#define NE7_ST3_RD 0x20 /* ready; PC: always true */ +#define NE7_ST3_T0 0x10 /* track 0 */ +#define NE7_ST3_TS 0x08 /* two-sided; PC: n/a */ +#define NE7_ST3_HD 0x04 /* upper head select */ +#define NE7_ST3_US 0x03 /* unit select */ + /* Commands */ +/* + * the top three bits -- where appropriate -- are set as follows: + * + * 0x80 - MT multi-track; allow both sides to be handled in single cmd + * 0x40 - MFM modified frequency modulation; use MFM encoding + * 0x20 - SK skip; skip sectors marked as "deleted" + */ +#define NE7CMD_READTRK 0x42 /* read whole track */ #define NE7CMD_SPECIFY 3 /* specify drive parameters - requires unit parameters byte */ #define NE7CMD_SENSED 4 /* sense drive - requires unit select byte */ #define NE7CMD_WRITE 0xc5 /* write - requires eight additional bytes */ #define NE7CMD_READ 0xe6 /* read - requires eight additional bytes */ -#define NE7CMD_FORMAT 0x4c /* format - requires five additional bytes */ #define NE7CMD_RECAL 7 /* recalibrate drive - requires unit select byte */ #define NE7CMD_SENSEI 8 /* sense controller interrupt status */ -#define NE7CMD_SEEK 15 /* seek drive - requires unit select byte +#define NE7CMD_WRITEDEL 0xc9 /* write deleted data */ +#define NE7CMD_READID 0x4a /* read ID field */ +#define NE7CMD_READDEL 0xec /* read deleted data */ +#define NE7CMD_FORMAT 0x4d /* format - requires five additional bytes */ +#define NE7CMD_SEEK 0x0f /* seek drive - requires unit select byte and new cyl byte */ +#define NE7CMD_SCNEQU 0xf1 /* scan equal */ +#define NE7CMD_SCNLE 0xf9 /* scan less or equal */ +#define NE7CMD_SCNGE 0xfd /* scan greater or equal */ + + +/* + * "specify" definitions + * + * acronyms (times are relative to a FDC clock of 8 MHz): + * srt - step rate; PC usually 3 ms + * hut - head unload time; PC usually maximum of 240 ms + * hlt - head load time; PC usually minimum of 2 ms + * nd - no DMA flag; PC usually not set (0) + */ + +#define NE7_SPEC_1(srt, hut) (((16 - (srt)) << 4) | (((hut) / 16))) +#define NE7_SPEC_2(hlt, nd) (((hlt) & 0xFE) | ((nd) & 1)) |