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/------------------------------------------------------
/	SYMBOL TABLE DR8EA, FD1771
/	ROBERT KRAUSE	09-MAY-1983
/
/MUST BE THE FIRST FILE IN ASSEMPLER INPUT !
/------------------------------------------------------


/------------------------------------------------------
/DR8EA COMMANDS
/------------------------------------------------------

DBDI=	6500	/DISABLE INTERRUPT
DBEI=	6501	/ENABLE INTERRUPT
DBSK=	6502	/SKIP ON DONE FLAG
DBCI=	6503	/CLEAR SELECTIVE INPUT REGISTER
DBRI=	6504	/TRANSFER INPUT TO AC
DBCO=	6505	/CLEAR SELECTIVE OUTPUT REGISTER
DBSO=	6506	/SET SELECTIVE OUTPUT REGISTER
DBRO=	6507	/TRANSFER OUTPUT TO AC


/------------------------------------------------------
/FD1771 COMMANDS
/------------------------------------------------------

QSR=	2	/STEP RATE 10MS
QVE=	4	/VERIFY FLAG
QHL=	10	/HEAD LOAD FLAG
QEN=	4	/ENABLE HLD
QMR=	20	/MULTIPLE RECORD FLAG
QM0=	0	/FB DATA MARK
QM1=	1	/FA USER DEFINED MARK
QM2=	2	/F9 USER DEFINED MARK
QM3=	3	/F8 DELETED DATA MARK
QSY=	1	/SYNCHRONIZE FLAG
QI0=	1	/INTERRUPT NOT READY TO READY TRANSITION
QI1=	2	/    "     READY TO NOT READY TRANSITION
QI2=	4	/    "     INDEX PULSE
QI3=	10	/    "     IMMEDIATE

FDRS=	000!QSR	/RESTORE
FDSE=	020!QSR	/SEEK
FDST=	060!QSR	/STEP
FDSI=	120!QSR	/STEP IN
FDSO=	160!QSR	/STEP OUT
FDRD=	210	/READ COMMAND
FDWR=	250	/WRITE COMMAND
FDRA=	300	/READ ADDRESS
FDRT=	344	/READ TRACK
FDWT=	364	/WRITE TRACK
FDFI=	320	/FORCE INTERRUPT


/------------------------------------------------------
/FD1771 REGISTER ADDRESSES
/------------------------------------------------------

FCSR=	1400	/COMMAND STATUS REGISTER
FTRK=	1000	/TRACK REG.
FSEC=	400	/SECTOR REG.
FDAT=	0	/DATA REG.


/------------------------------------------------------
/FD1771 STATUS REGISTER BITS
/------------------------------------------------------

FSNR=	200	/NOT READY
FSWP=	100	/WRITE PROTECT
FSHE=	40	/HEAD ENGAGED
FSWF=	40	/WRITE FAULT
FSSE=	20	/SEEK ERROR
FSNF=	20	/ID OR RECORD NOT FOUND
FSCE=	10	/CRC ERROR
FSLD=	4	/LOST DATA
FSIP=	2	/INDEX PULSE
FSCP=	1	/COMMAND IN PROGRESS

	FIXTAB

/======================================================

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