MOTORSELECT = 3f2h
DISKSTATUS = 3f4h
DISKDATA = 3f5h
INPUTSTATUS = 3F6H
RATECONFIG = 3F7H

FLOPPY_DMA = 2
SECTORSIZE = 1024
SECTORSHIFT = 10

HEADSEL_BIT = 2

CMD_SPECIFY = 3
CMD_RECALIBRATE = 7
CMD_SENSE = 8
CMD_SEEK = 0FH
CMD_READID = 4ah
CMD_FORMAT = 04DH
CMD_WRITE = 0C5H
CMD_READ = 0E6H

CSR_READY = 80h
CSR_READ = 40h

MTR_NOSELECT = 0fch
MTR_DMA	= 8
MTR_NORESET = 4
MTR_MASKOFF = 0fh

DTIME_MUL = 182
DTIME_DIV = 100

CHANGEABLE = 80h
MULTIHEAD = 1

struc	stdparams
cmd	db	?
drivehead db	?
cylinder db	?
head	db	?
sector	db	?
size	db	?
eot	db	?
gaplen	db	?
cusize	db	?
ends	stdparams

SR0_UNUSED =	7
SR0_ABTERM = 	6
SR0_SEEK   =	5
SR0_RECALFAIL =	4

SR1_SECTOOBIG = 7
SR1_CRC	=	5
SR1_OVERRUN =	4
SR1_NODATA  =	2
SR1_WRITEPROT = 1
SR1_NOADDRESS = 0

SR2_BADSEC =	6
SR2_CRC	=	5
SR2_WRONGCYL =	4
SR2_BADCYL =	1
SR2_MISSADDRESS = 0

struc	stdresponse
sr0	db	?
sr1	db 	?
sr2	db	?
cylinder db	?
head	db	?
sector	db	?
size	db	?
ends	stdresponse

DERR_NONE	=	0
DERR_INVFUNC	=	1
DERR_NOADDRESS	=	2
DERR_WRITEPROT	=	3
DERR_NOSECT	=	4
DERR_CHANGED	=	6
DERR_DMAOVER	=	8
DERR_DMABOUND	=	9
DERR_BADMEDIA	=	0CH
DERR_BADCRC	=	10H
DERR_CTRLFAIL	=	20H
DERR_SEEKFAIL	=	40H
DERR_TIMEOUT	=	80H

STRUC	diskparm
steploadul	dw	4 DUP (?)
media		db	4 DUP (?)
turnoff		db	4 DUP (?)
hptchange	db	4 DUP (?)
tpd		db	4 DUP (?)
bpsspt		dw	4 DUP (?)
fglfill		dw	4 DUP (?)
settle		db	4 DUP (?)
pup		db	4 DUP (?)
ENDS	diskparm