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diff --git a/sw/rescue/muenchen2013/files/krause_soft/fdsub.bk b/sw/rescue/muenchen2013/files/krause_soft/fdsub.bk
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+/MEMOREX FD651 - FD1771 - DR8EA
+
+/------------------------------------------------------
+/FLOPPY DISC CONTROLLER AND DRIVE TEST
+/
+/	ROBERT KRAUSE  MaY 1983
+/------------------------------------------------------
+
+
+/------------------------------------------------------
+/DR8EA - CONTROLLER CONNECTIONS
+/------------------------------------------------------
+
+/INPUT
+/	0    = -DRQ
+/	1    = -INTRQ
+/	2,3  = NOT USED
+/	4-11 = -DAL (IN)
+/
+/OUTPUT
+/	0    = WE
+/	1    = RE
+/	2,3  = A1,A0
+/	4-11 = -DAL (OUT)
+/
+/------------------------------------------------------
+
+
+/------------------------------------------------------
+/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
+
+/======================================================
+
+
\ No newline at end of file