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10,7/unsmon/fhxkon.mac
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TITLE FHXKON DEVICE DEPENDENT RC-10/RD-10 SUBROUTINES V115
SUBTTL RG UNDERWOOD/TW 23 AUG 88
SEARCH F,S,DEVPRM
$RELOC
$HIGH
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED
; OR COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
;COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATION
; 1973,1974,1975,1976,1977,1978,1979,1980,1984,1986,1988.
;ALL RIGHTS RESERVED.
.CPYRT<1973,1988>
XP VFHXKN,115 ;VERSION NUMBER FOR MAP AND GLOB
;ASSEMBLY INSTRUCTIONS: FHXKON,FHXKON/C_S,KONPAR,FHXKON
ENTRY FHXKON
ALLERR==177720 ;ALL ERRORS EXCEPT SEARCH (SINCE SEARCH
; CAN ONLY BE CLEARED BY DOING A FUNCTION)
XP FHALCL,177710 ;CLEAR ALL ERRORS
SRCERR==200000 ;SEARCH ERROR
OVRERR==100 ;OVERRUN
;DEFINED IN KONKON
REPEAT 0,<
FHXCI1: CONI FH'N,T2
FHXCOT: CONO FH'N,(T1)
FHXCO1: CONO FH'N,(T2)
FHXDI2: DATAI FH'N,T3
FHXDOT: DATAO FH'N,T1
FHXIWD: 0 ;INITWD
>
;CONO/CONI FORMAT [CONO FUNCTION,*IF RESET OF CONI]
; BIT(S)
; 0-4 .SPARE
; 5 [SPARE]MAINT.SEG
; 6 [SPARE]PROTECTION AREA
; 7-17 [SPARE]
; 18 [SELECT SECTOR COUNTER(1)]DATA TRANSFER IN PROGRESS
; 19 [SELECT SECTOR COUNTER(0)]SEARCH ERROR
; 20 [*]DISK DESIGNATION ERROR
; 21 [*]TRACK SELECT ERROR
; 22 [*]DISK NOT READY
; 23 [*]POWER SUPPLY FAILURE
; 24 [*]DISK PARITY ERROR
; 25 [*]CHAN DATA PARITY ERROR
; 26 [*]CHAN CW PARITY ERROR
; 27 [*]NON-X-MEM
; 28 [*]PROTECTION ERROR(ILLEGAL WRITE)
; 29 [*]OVER-RUN
; 30 [WRITE CW]CW WRITTEN INTO MEMORY
; 31 [*]BUSY
; 32 [*]DONE
; 33-35 PI CHAN ASSG
;DATAO FORMAT
; 0-1 DISK SELECTION
; 2-10 TRK SELECTION(BIT2=UPPER(1).OR LOWER(0)TRACKS0-99 IN TWO BCD CHAR)
; 11-17 SEGMENT SELECT(TWO BCD CHAR 0-79)
; 18-23 INITIAL PARITY CHARACTER
; 24 DISABLE DISK PARITY ERROR STOP
; 25 DISABLE CHAN PARITY ERROR STOP(CHAN DATA PARITY ONLY)
; 26 WRITE
; 27-34 INITIAL CONTROL WORD ADDRESS
; 35 WRITE EVEN PARITY INTO MEMORY(DURING READ ONLY)
;DATA: FORMAT
; 0-17 SPARE
; 18-23 INITIAL PARITY REGISTER
; 24,25 SPARE
; 26,27 SECTOR COUNTER SELECTED
; 28-35 SECTOR COUNTER
SUBTTL AUTOCONFIGURATION
FHFIX==400000 ;BIT 0 = 1 IF FIXED HEAD DEVICE
FHOFS==400000 ;NO OFFSET CAPABILITY
FHRDC==400000 ;NO 10/11 COMPATABILITY MODE
FHUNL==400000 ;NO UNLOAD CAPABILITY
FHCPY==KOPIDL ;KONTROLLER MUST BE IDLE TO DETERMINE UNIT TYPE
FHMX==0 ;CANNOT DO MULTIPLE TRANSFERS
FHDRB==0 ;DOESN'T USE DISK I/O REQUEST BLOCKS
FHBMX==0 ;NOT A BLOCK MULTIPLEX KONTROLLER
FHECA==0 ;TRY OFFSET/RECAL BEFORE TRYING ECC
FHERNO==0 ;NO DRIVE REGISTERS TO SAVE ON ERROR
FHXDMX==10 ;MAXIMUM NUMBER OF DRIVES ON KONTROLLER
FHXHDN==FHXDMX-1 ;HIGHEST DRIVE NUMBER ON KONTROLLER
;DRIVER CHARACTERISTICS
; FHX = FHXCNF
; DSK = DISK
; 0 = MAXIMUM DEVICES IN SYSTEM (NO LIMIT)
; TYPFH = KONTROLLER TYPE
; FHXDMX = MAXIMUM DRIVES PER KONTROLLER
; FHXHDN = HIGHEST DRIVE NUMBER ON KONTROLLER
; MDSEC0 = SECTION FOR KDB/UDB
; MDSEC0 = SECTION FOR DDB
DRVCHR (FHX,DSK,0,TYPFH,FHXDMX,FHXHDN,MDSEC0,MDSEC0,<DR.MCD>)
.ORG KONUDB ;START OF KONTROLLER SPECIFIC DATA
FHXUTB:!BLOCK FHXDMX ;UDB TABLE
FHXEBK:!BLOCK 1 ;DUMMY STORAGE FOR REGISTERS
FHXIOB:! ;START OF SPECIAL I/O INSTRUCTIONS
FHXCI1:!BLOCK 1
FHXCOT:!BLOCK 1
FHXCO1:!BLOCK 1
FHXDI2:!BLOCK 1
FHXDOT:!BLOCK 1
FHXIOE:! ;END OF SPECIAL I/O INSTRUCTIONS
FHXIWD::!BLOCK 1 ;INITWD STORAGE
FHXIUM:! BLOCK FHXDMW ;IGNORE DRIVE MASK
FHXNUM:! BLOCK FHXDMW ;NEW DRIVE MASK
FHXKLN:! ;LENGTH OF KDB
.ORG
;PROTOTYPE KDB
FHXKDB: XXKON (FH)
SETWRD (FHXCI1,<CONI 000,T2>)
SETWRD (FHXCOT,<CONI 000,(T1)>)
SETWRD (FHXCO1,<CONO 000,(T2)>)
SETWRD (FHXDI2,<DATAO 000,T3>)
SETWRD (FHXDOT,<DATAO 000,T1>)
KDBEND
EQUATE (LOCAL,0,<FHXULP,FHXULB>)
EQUATE (LOCAL,CPOPJ##,<FHXALV,FHXEDL,FHXHWP,FHXINI,FHXRLD>)
FHXCCM==CYLCM##
FHXICD==DSKICD## ;PROTOTYPE INTERRUPT CODE
FHXICL==DSKICL##
FHXUDB==0 ;NO PROTOTYPE UDB
FHXULN==UNIEBK+FHERNO ;LENGTH OF UDB
FHXDSP: DRVDSP (FHX,DSKCHN##,DSKDDB##,DDBLEN##,DSKDIA##)
;DEFAULT MONGEN'ED DEVICE TABLE
DEFMDT: MDKL10 (7,170,0,0,<MD.KON>) ;DEVICE CODE 170
MDKL10 (7,174,0,0,<MD.KON>) ;DEVICE CODE 174
MDTERM ;TERMINATE TABLE
FHXCKT: EXP 0 ;COMPATIBLE KONTROLLER TABLE
FHXCFG: XMOVEI T1,FHXMDT## ;MONGEN'ED DEVICE TABLE
XMOVEI T2,DEFMDT ;DEFAULT TABLE
MOVNI T3,1 ;NO MASSBUS UNIT OR DRIVE INFORMATION
MOVEI T4,MD.KON ;MATCH ON KONTROLLER DEFINITION
PUSHJ P,AUTMDT## ;SCAN THE TABLES
JRST CPOPJ1## ;NO MATCHES
PUSHJ P,SAVE1## ;SAVE P1
MOVSI T1,0 ;I/O BUS-STYLE CHANNEL
PUSHJ P,AUTCHN## ;BUILD A CHANNEL DATA BLOCK
POPJ P, ;NO CORE
MOVNI T1,1 ;NO MASSBUS UNIT NUMBER
MOVEI T2,TYPFH ;KONTROLLER TYPE
PUSHJ P,DSKKON## ;BUILD A KDB
POPJ P, ;GIVE UP IF NO CORE
MOVSI T1,-<FHXIOE-FHXIOB> ;NUMBER OF WORDS TO CHECK
XMOVEI T2,FHXIOB(J) ;STARTING WORD
HRRZ T3,.CPDVC## ;<DEVICE CODE>/4
PUSHJ P,AUTDVC## ;SET DEVICE CODES
MOVE T1,KDBCSO(J) ;GET CONSO SKIP CHAIN ADDRESS
;***NEED SYMBOL (DONE)
MOVEI T2,10 ;AND INTERRUPT FLAGS
HRRM T2,DICDIF##(T1) ;SET THEM
MOVSI P1,-1 ;NO MASSBUS UNIT,,DRIVE 0
FHXCF1: PUSHJ P,FHXDRV ;AUTOCONFIGURE A SINGLE DRIVE
JFCL ;IGNORE ERRORS
HRRZ T1,P1 ;GET DRIVE NUMBER
CAIGE T1,FHXDMX-1 ;DONE ALL DRIVES?
AOJA P1,FHXCF1 ;LOOP BACK FOR MORE
JRST CPOPJ1## ;TRY ANOTHER DEVICE ON CHANNEL
;CONFIGURE A SINGLE DRIVE
FHXDRV: HRRZ T1,P1 ;GET UNIT
MOVE T1,BITTBL##(T1) ;AND IT'S BIT
TDNE T1,FHXIUM(J) ;WANT TO IGNORE THIS DRIVE?
POPJ P, ;SAY IT DOESN'T EXIST
XMOVEI T1,FHXMDT## ;MONGEN'ED DEVICE TABLE
XMOVEI T2,DEFMDT ;AND THE DEFAULT TABLE
MOVE T3,P1 ;DRIVE INFORMATION
PUSHJ P,AUTMDT## ;FOUND A DRIVE MATCH?
POPJ P, ;NO
HRLZ T1,P1 ;PHYSICAL DRIVE NUMBER
HRR T1,P1 ;UDB TABLE INDEX
MOVEI T2,TYPFH ;FLAGS,,UNIT TYPE
PUSHJ P,DSKDRV## ;BUILD A UDB
JFCL ;FAILED
JRST CPOPJ1## ;RETURN
;ONCE A SECOND CODE
FHXSEC: SKIPL @KDBCHN(J) ;CHANNEL BUSY?
POPJ P, ;LEAVE IT ALONE
SKIPE T1,FHXNUM(J) ;GET BIT MASK
JFFO T1,FHXSE1 ;FIND FIRST UNIT NUMBER
HRRZS KDBNUM(J) ;INDICATE NO DRIVES TO CONFIGURE
POPJ P, ;DONE
FHXSE1: PUSHJ P,AUTLOK## ;GET AUTCON INTERLOCK
POPJ P, ;TRY AGAIN NEXT TIME
PUSHJ P,SAVW## ;PRESERVE W
MOVE W,J ;COPY KDB ADDRESS TO W FOR AUTCON
PUSH P,T2 ;SAVE PHYSICAL DRIVE NUMBER
MOVE T1,KDBDVC(J) ;DEVICE CODE
XMOVEI T2,FHXDSP ;DISPATCH
MOVE T3,KDBCHN(J) ;CHANNEL DATA BLOCK
PUSHJ P,AUTSET## ;SET UP CPU VARIABLES
EXCH P1,(P) ;SAVE P1, PHYSICAL DRIVE NUMBER
TLO P1,-1 ;NO MASSBUS UNIT
PUSH P,KDBUNI(J) ;SAVE KDBUNI
MOVEM P1,KDBUNI(J) ;SET FOR THIS MASSBUS UNIT NUMBER (FOR RDMBR)
PUSHJ P,FHXDRV ;CONFIGURE A NEW UNIT
JFCL ;IGNORE ERRORS
PUSHJ P,AUTULK## ;RELEASE AUTCON INTERLOCK
POP P,KDBUNI(J) ;RESTORE KDBUNI
PJRST P1POPJ## ;RESTORE P1 AND RETURN
;SUBROUTINES TO INITIATE DATA TRANSFER.(ENTER WITH U AND J SET-UP)
FHXKON::
FHXRDC::
FHXRDF::
FHXRED::TDZA T4,T4 ;HERE TO READ W/O STOP ON ERROR
FHXWTF::
FHXWTC::
FHXWRT::MOVEI T4,1B26 ;HERE TO WRITE W/O STOP ON ERROR
TRO T4,3B25 ;SUPPRESS STOP ON ERROR (BOTH CHN MEM AND DEV)
JRST FHXGO
FHXRDS::TDZA T4,T4 ;HERE TO READ AND STOP ON ERROR
FHXWTS::MOVEI T4,1B26 ;HERE TO WRITE AND STOP ON ERROR
FHXGO: XCT FHXCI1(J) ;CONI FH'N,T2
TRNE T2,ALLERR ;NO ERROR CONDITIONS(INCL BUSY)ALLOWED
JRST FHXPOP
MOVE T1,UNIBLK(U) ;T1 _ LOGICAL BLOCK NUMBER
PUSHJ P,CNVBLK ;CONVERT LOGICAL BLOCK TO BARE DATAO IN ITWD
IOR T1,KDBICP(J) ;INSERT INIT CHAN CNTL WD ADDR
IORI T1,(T4) ; AND FUNCTION CNTL FLAGS
MOVEM T1,FHXIWD(J) ;SAVE COMPLETED INITWD FOR OTHERS
SETZ T2,
XCT FHXCO1(J) ;CONO FH'N,(T2)
XCT FHXDOT(J) ;DATAO FH'N,T1
MOVEI T2,DSKCHN## ;PI CHAN FOR DISK
XCT FHXCO1(J) ;CONO FH'N,(T2) ;TURN ON PI
XCT FHXCI1(J) ;CONI FH'N,T2
TRNE T2,7 ;IS THE PI THERE?
PJRST CPOPJ1## ;YES, GOOD RETURN
FHXPOP: MOVEI T1,FHALCL ;NO, CLEAR OUT THE ERRORS
XCT FHXCOT(J) ; SO WILL RETRY NEXT TIME
TRNN T2,3B23 ;UNIT OFF-LINE?
TDZA T1,T1 ;NO
MOVEI T1,KOPOFL ;YES, INDICATE OFF-LINE
XCT FHXDI2(J) ;DATAI FM'N,T3
POPJ P, ;GO TELL FILSER
;CONVERT LOGICAL BLOCK IN T1 TO DISK DATAO INITWD IN T1(LOGICAL BLOCK# IS LOST)
CNVBLK: LDB T3,UNYBPT## ;GET # BLOCKS/TRACK
IDIVI T1,(T3) ;EXTRACT TRACK ADDR, (T1)=TRACK, (T2)=SEGMENT
PUSH P,T2 ;SAVE SEGMENT
IDIVI T1,^D10 ;CONVERT TRACK TO BCD
CAIL T1,^D10 ;A SHORT-CUT BECAUSE RANGE=0-199/10=0-19
ADDI T1,6 ;A BCD TENS CHAR
LSH T1,4 ;LEFT JUSTIFIED TO MAKE ROOM FOR UNITS
IOR T1,T2 ;NOW THE UNITS, HENCE A BCD TRACK ADDR
ROT T1,-^D11 ;PROPERLY JUSTIFIED FOR DATAO WD
EXCH T1,(P) ;SAVE TRACK AND FETCH SEGMENT
LDB T2,UNYUTP## ;GET UNIT TYPE (RD-10 =0 RM10B =1)
TRC T2,1 ;SET RD=1 - RM=0
LSH T1,1(T2) ;SEGMENT*2(OR 4)=128 WORD BLOCK
IDIVI T1,^D10 ;CONVERTED TO BCD ADDR.
LSH T1,4 ;LEFT JUSTIFY TENS CHAR
IOR T1,T2 ;INSERT UNITS CHAR
HRLZS T1 ;JUSTIFY FOR DATAO
IORM T1,(P) ;AND SAVE AWAY
MOVE T1,UDBPDN(U) ;PHYSICAL DRIVE NUMBER
ROT T1,-2 ;JUSTIFIED
IORM T1,(P) ;UNIT NUMBER SAVED AWAY
JRST TPOPJ## ;EXIT
;THIS DEVICE DOESN'T POSITION!
FHXPOS::HALT CPOPJ1##
FHXUNL::
FHXECC::
FHXERR::STOPCD CPOPJ1##,DEBUG,CIF, ;++RC10 ISNT FANCY
FHXREG::POPJ P, ;NO MASSBUS REGS TO READ
;SUBROUTINE TO COMPUTE ROTATIONAL LATENCY
;CALL: MOVE T1,LOGICAL BLOCK DESIRED
; PUSHJ P,FHXLTM
; ERROR RETURN-DEVICE NOT READY OR BUSY
; OK RETURN, T1 CONTAINS NO. OF MICROSECONDS TILL GET TO SECTOR
;ROUTINE IS WRITTEN TO BE FAST AS POSSIBLE SINCE CALLED IN LOOP ON PI LEVEL
FHXLTM::XCT FHXCI1(J) ;READ CONTROLLER STATUS-CONI F4'N,T2
TRNE T2,ALLERR ;ANY ERRORS (INCLUDING BUSY)
POPJ P, ;YES, ERROR RETURN
MOVE T2,UDBPDN(U) ;GET PHYSICAL DRIVE NUMBER
LSH T2,^D16 ;SHIFT TO UNITS POSITION
IORI T2,DSKCHN## ;PREPARE T2
XCT FHXCO1(J) ;SELECT UNIT AND SECTOR COUNTER-CONO FH'N,T2
XCT FHXDI2(J) ;READ SECTOR COUNTER
ANDI T3,377 ;MASK OUT ALL BUT SECTOR INFO
FHXLTL: MOVE T2,T3 ;SAVE SECTOR
XCT FHXDI2(J) ;READ SECTOR COUNTER AGAIN
ANDI T3,377 ;MASK OUT ALL BUT SECTOR INFO
CAME T3,T2 ;ARE THEY THE SAME?
JRST FHXLTL ;NO, READ AGAIN-COUNTERS IN TRANSITION
ANDI T2,17 ;YES, MASK FOR UNITS POSITION
LSH T3,-4 ;RIGHT JUSTIFY TENS CHAR
IMULI T3,^D10 ;CONVERT TO BINARY
ADDI T3,(T2) ;ADD UNITS FOR BINARY
MOVEI T2,UNPUTP ;UNIT TYPE BIT
TDNN T2,UNIUTP(U) ;IS IT AN RM10B DRUM
JRST FHXLTD ;NO, RD10 DISK
;HERE TO COMPUTE LATENCY FOR RM10B DRUM (BRYANT) ON RC10
IDIVI T1,^D30 ;NO, COMPUTE DESIRED BLOCK FROM LOGICAL BLOCK NO.
; 30=NO. OF 128 WORD BLOCKS PER REVOLUTION
LSH T2,1 ;CONVERT TO DESIRED 64 WORD SECTOR
SUBI T2,3(T3) ;DISTANCE=DESIRED-ACTUAL 64 WORD SECTOR
;ALLOW FOR 3 SECTORS AHEAD=850 MICROSECS.
JUMPGE T2,FHXLT1 ;IS DISTANCE POSITIVE?
ADDI T2,^D61 ;NO, ADD NO. OF 64 WORD SECTORS PER REV.
JUMPL T2,.-1 ;IS IT STILL NEGATIVE (3 OUT OF 3600 TIMES)?
FHXLT1: IMULI T2,^D285 ;NO, CONVERT TO NO. OF MICROSECONDS
; 285 MICROSECONDS PER 64 WORD SECTOR.
JRST FHXLTE ;MOVE RESULT TO T1 AND SKIP RETURN
;HERE TO COMPUTE LATENCY FOR RD10 DISK (BURROUGHS) ON RC10
FHXLTD: IDIVI T1,^D20 ;COMPUTE DESIRED BLOCK FROM LOGICAL BLOCK NO.
; 20=NO. OF 128 WORD BLOCKS PER REVOLUTION
LSH T2,2 ;CONVERT TO DESIRED 32 WORD SECTOR.
SUBI T2,2(T3) ;DISTANCE=DESIRED-ACTUAL 32 WORD SECTOR
; ALLOW FOR 2 SECTORS AHEAD=262 MICROSEC.
JUMPGE T2,FHXLT2 ;IS DISTANCE POSITIVE?
ADDI T2,^D81 ;NO, ADD NO. OF 32 WORD SECTORS PER REV.
JUMPL T2,.-1 ;IS IT STILL NEGATIVE (2 OUT OF 6400 TIMES)?
FHXLT2: IMULI T2,^D431 ;YES, CONVERT TO NO. OF MICROSECONDS
FHXLTE: MOVE T1,T2 ;RETURN IN T1
AOS (P) ;SKIP RETURN - DO NOT JRST CPOPJ1 FOR SPEED
POPJ P, ;RETURN
;SUBROUTINE TO INTERFACE FHX WITH FILINT
;ENTERED FROM COMMON WITH AC-J AND P SET-UP
FHXINT::XCT FHXCI1(J) ;CONI FH'N,T2
MOVE U,KONCUA(J) ;U _ UNIT DATA BLOCK ADDR
MOVS T4,UDBPDN(U) ;PHYSICAL DRIVE NUMBER TO LH (T4)
MOVE T3,FHXIWD(J) ;T3 _ LAST DEVICE INITWD
TRNE T3,1B26 ;WAS IT A WRITE?
TRO T4,OPWRT ;YES,SET WRITE FUNCTION
TRNN T2,ALLERR!SRCERR ;ANY ERRORS ON INTERRUPT
JRST XFRDUN ;NO,GO
;HERE ON ANY INTERRUPT ERROR.
TRNE T2,7B27!1B29 ;CHAN PARITY OR NXM OR DATA LATE?
JRST REFER ;YES, REFRENCE THE BAD LOC
TRNE T2,1B24 ;DISK PARITY ERROR?
TROA T4,IODTER
TRO T4,IODERR
XFRDUN: XCT FHXDI2(J) ;DATAI FH'N,T3 - ARG TO FILINT
MOVEI T1,FHALCL ;THEN CLEAR THE DEVICE
TRNE T2,1B22 ;LEAVE NOT-READY UP SO FHXGO WILL NOTICE
MOVEI T1,1B32
XCT FHXCOT(J)
MOVE T1,T4 ;T1 _ FILINT STATUS WORD
PJRST FILINT## ;EXIT TO FILINT
REFER: TRNE T2,OVRERR ;OVERRUN?
TRNE T2,ALLERR!SRCERR-OVRERR ;YES, ONLY OVERRUN?
JRST REFER3 ;NO, LOSE
MOVE T1,KDBICP(J) ;YES, GET L(ICWA)
PUSH P,P1
MOVE P1,UDBKDB(U)
MOVE P1,KDBCHN(P1)
LDB T3,CNTPT1##+0 ;L(LAST IOWD USED)+1
SKIPE T1,(T3) ;IS IT LAST IOWD?
JRST REFER2 ;NO, REAL ERROR
LDB T1,ADRPT2##+0 ;FIRST ADR OF LAST IOWD
LDB T3,CNTPT2##+0 ;COUNT OF LAST IOWD
TDO T3,CNTFIL##
MOVNS T3
ADD T3,T1 ;LAST ADR +1
MOVE T1,KDBICP(J)
LDB T1,ADRPT1##+0 ;LAST ADR+1 STORED BY CHAN
REFER2: POP P,P1
CAMN T1,T3 ;WAS LAST WORD OBTAINED BY CHAN?
JRST XFRDUN ;YES, IGNORE THE ERROR, WE WON ANYWAY
TRO T4,IOVRUN+IODERR ;NO, INDICATE OVERRUN
REFER3: TRNE T2,6B27 ;CHAN-DETECTED ERROR
TRO T4,IOCHMP+IODERR ; CORE-PARITY ERROR
TRNE T2,1B27
TRO T4,IOCHNX+IODERR ;NXM
JRST XFRDUN ;CONTINUE
;HERE TO CHECK THE CAPACITY & STATUS OF A UNIT
; IF CALLED BY ONCE-ONLY REQUIRES F AND .UPMBF TO BE SET UP
FHXCPY::MOVSI T4,KOPUHE ;SET FOR UNIT HAD ERROR RETURN
XCT FHXCI1(J) ;CONI FH'N,T2
TLNE T2,(1B5) ;MAINT. SEGMENT SWITCH ON?
JRST FHXCL1 ;OFF LINE - NON-SKIP RETURN
SKIPN DINITF## ;IN ONCE-ONLY?
JRST FHXCP5 ;NO, ASSUME CONTROLLER IS OK
MOVEI T3,^D5 ;NUMBER OF TIMES TO RETRY BEFORE SAYING OFF-LINE
FHXCP1:
; MOVE T1,KONCOM(J)
; HRRZM T1,@KDBICP(J) ;SETUP LOW CORE CHANNEL WORD
MOVE T2,.USMBF
MOVEM T2,(T1) ;SETUP IOWD
SETZB T2,1(T1) ;END OF LIST
XCT FHXCO1(J) ;CONO FH'N,(T2)
MOVE T1,UDBPDN(U) ;PHYSICAL DRIVE NUMBER
ROT T1,-2 ;POSITION FOR DATAO
TLO T1,160 ;SECTOR BCD 70, TRACK 0. ILLEGAL ON RM10B
IOR T1,KDBICP(J)
XCT FHXDOT(J) ;DATAO FH'N,T1 , CAUSE READ INTO MONITOR BUFFER
MOVEI T1,^D120000 ;SETUP COUNT FOR TIME OUT ON DONE FLAG TEST
FHXCP2: XCT FHXCI1(J) ;CONI FH'N,T1
TRNE T2,1B31 ;BUSY STILL UP?
SOJG T1,FHXCP2 ;YES, TRY AGAIN
TRNN T2,1B32 ;NO, DONE UP?
SOJG T1,FHXCP2 ;NO, TRY AGAIN
TDNN T2,[1377,,170220] ;YES. ANY ERRORS?
JUMPG T1,FHXCP6 ;NO. IT'S THERE IF DIDNT TIME OUT
MOVEI T1,FHALCL
XCT FHXCOT(J)
SOJG T3,FHXCP1 ;TRY AGAIN
JRST FHXCL1 ;COUNT EXPIRED & NO DONE FLAG -OFF-LINE RETURN
FHXCP5: MOVE T1,UDBPDN(U) ;PHYSICAL DRIVE NUMBER
ROT T1,-2 ;POSITION IT
TLO T1,177777 ;ILLEGAL ADR SO DSK WON'T DO IO
XCT FHXDOT(J) ;CONNECT CONTROL TO RIGHT UNIT
XCT FHXCI1(J) ;READ UNIT STATUS (DRIVE TYPE)
FHXCP6: MOVEI T4,0 ;ASSUME IT'S AN RD10
TLNE T2,(1B4) ;IS IT AN RD10?
MOVEI T4,1 ;NO, AN RM10B
HRRZ T2,CAPDAT(T4) ;GET # BLOCKS ON UNIT
MOVE W,CAPDAT(T4) ;GET # BLOCKS PER TRACK
MOVEI T3,0 ;NO COMPATABILITY MODE
AOS 0(P) ;SKIP RETURN AFTER FHXCL1
FHXCL1: MOVEI T1,FHALCL
XCT FHXCOT(J)
MOVE T1,T2 ;RESTORE # BLOCKS ON UNIT
POPJ P,
CAPDAT: XWD ^D20,^D4000 ;RD-10 DATA
XWD ^D30,^D2700 ;RM-10B DATA
$INIT
;CHECK TO SEE IF KONTROLLER IS UP
FHXUPA: MOVEI T1,FHALCL+DSKCHN## ;CLEAR ALL ERROR FLAGS
XCT FHXCOT(J) ;CONO FH'X,(T1)
XCT FHXCI1(J) ;CONI FH'X,T2
TRNN T2,1B23!1B31!1B32 ;ANYTHING WRONG
TRNN T2,7 ;ARE THE PI BITS THERE?
POPJ P, ;YES - ERROR RETURN
JRST CPOPJ1## ;OK RETURN
$HIGH
;SUBROUTINE TO STOP UNIT AND CLEAR BUSY
FHXSTP::XCT FHXCI1(J) ;DO CONI, DATAI
XCT FHXDI2(J)
MOVEI T1,20 ;TRY TO CLEAR BUSY
XCT FHXCOT(J)
PUSH P,T2
XCT FHXCI1(J)
TRNN T2,20 ;DID IT CLEAR ?
AOS -1(P) ;YES, SKIP
PJRST T2POPJ## ;RESTORE CONI AND RETURN
FHXRCL::POPJ P, ;RECALIBRATE GIVES ERROR RETURN
LIT
FHXEND: END