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-rw-r--r--sys/i386/isa/ic/nec765.h73
1 files changed, 68 insertions, 5 deletions
diff --git a/sys/i386/isa/ic/nec765.h b/sys/i386/isa/ic/nec765.h
index df6c337482aa..c02e6ef362ba 100644
--- a/sys/i386/isa/ic/nec765.h
+++ b/sys/i386/isa/ic/nec765.h
@@ -30,8 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * from: @(#)nec765.h 7.1 (Berkeley) 5/9/91
- * $Id: nec765.h,v 1.2 1993/10/16 13:48:50 rgrimes Exp $
+ * @(#)nec765.h 7.1 (Berkeley) 5/9/91
*/
/*
@@ -47,26 +46,90 @@
#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))