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bb-m080u-sm_t20_v7_0_23_mon_src_mod
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monitor-sources/phyh2.mac
There are 52 other files named phyh2.mac in the archive. Click here to see a list.
; Edit= 8908 to PHYH2.MAC on 16-Aug-88 by GSCOTT
;Update BUG. documentation.
; Edit= 8855 to PHYH2.MAC on 30-Jun-88 by RASPUZZI, for SPR #21891
;Prevent ILLGO BUGHLTs by not trashing T3 when function 0 has been done.
; UPD ID= 8584, RIP:<7.MONITOR>PHYH2.MAC.5, 11-Feb-88 16:54:14 by GSCOTT
;TCO 7.1218 - Update copyright date.
; UPD ID= 8431, RIP:<7.MONITOR>PHYH2.MAC.4, 4-Feb-88 14:12:52 by GSCOTT
;TCO 7.1210 - Set P2RAE1, P2RAE2, P2RAE3, PH2DNA, PH2IHM, and PH2PIM
; normally not dumpable.
; UPD ID= 8429, RIP:<7.MONITOR>PHYH2.MAC.3, 4-Feb-88 14:01:44 by GSCOTT
;TCO 7.1213 - Prevent Class A Massbus errors from causing an ILLGO because
; RH2HNG doesn't clear the stacked transfer before a retry is attempted.
; *** Edit 7463 to PHYH2.MAC by RASPUZZI on 28-Apr-87, for SPR #20634
; Catch ILLUUOs before they happen on a non-existant RH20 channel. Instead,
; let's crash with a RH2NXC.
; UPD ID= 2155, SNARK:<6.1.MONITOR>PHYH2.MAC.35, 5-Jun-85 10:39:02 by MCCOLLUM
;TCO 6.1.1406 - Update copyright notice.
; UPD ID= 1908, SNARK:<6.1.MONITOR>PHYH2.MAC.34, 4-May-85 22:08:26 by MCCOLLUM
;TCO 6.1.1238 - Fix more BUG. documentation
; UPD ID= 1844, SNARK:<6.1.MONITOR>PHYH2.MAC.33, 30-Apr-85 11:58:47 by MCCOLLUM
;TCO 6.1.1238 - Fix BUG. documentation
; UPD ID= 1466, SNARK:<6.1.MONITOR>PHYH2.MAC.32, 3-Feb-85 15:18:12 by PAETZOLD
;TCO 6.1.1171 - Fix up ILLGO calculation for modulo 22 bit addressing
; UPD ID= 1462, SNARK:<6.1.MONITOR>PHYH2.MAC.31, 2-Feb-85 11:23:52 by GROSSMAN
;TCO 6.1.1169 - Move KLNI initialization to PHYSIO.
; UPD ID= 4617, SNARK:<6.MONITOR>PHYH2.MAC.30, 28-Jul-84 14:37:49 by GROSSMAN
;Remove references to KNIN.
; UPD ID= 4599, SNARK:<6.MONITOR>PHYH2.MAC.29, 27-Jul-84 00:06:59 by GROSSMAN
;TCO 6.2147 Simplify KLNI initialization.
; UPD ID= 4544, SNARK:<6.MONITOR>PHYH2.MAC.27, 15-Jul-84 21:25:44 by PURRETTA
;Update copyright notice
; UPD ID= 4173, SNARK:<6.MONITOR>PHYH2.MAC.26, 2-May-84 14:36:08 by MCLEAN
;MAKE PH2IUA A BUGHLT IT IS MUCH BETTER
; UPD ID= 3744, SNARK:<6.MONITOR>PHYH2.MAC.25, 23-Feb-84 18:54:25 by MCLEAN
;I WAS SOLD DOWN THE RIVER ON THE LAST EDIT BY MOSER... TRY AGAIN
; UPD ID= 3720, SNARK:<6.MONITOR>PHYH2.MAC.24, 21-Feb-84 13:54:56 by MCLEAN
;CHECK FOR LOSS OF PORT AT RH2UNS+ A FEW FOR DEVICE TYPE OF 0
; UPD ID= 3577, SNARK:<6.MONITOR>PHYH2.MAC.23, 28-Jan-84 08:24:25 by GRANT
;Remove "*** TEMPORARY ***" comment in RH2INI
; UPD ID= 2935, SNARK:<6.MONITOR>PHYH2.MAC.22, 27-Sep-83 09:44:11 by GRANT
;KLIPA initialization no longer done in RH2INI
; UPD ID= 2778, SNARK:<6.MONITOR>PHYH2.MAC.21, 28-Jul-83 14:05:14 by MCLEAN
;GET IT RIGHT.....
;MORE WRNGUN FIX
; UPD ID= 2762, SNARK:<6.MONITOR>PHYH2.MAC.19, 24-Jul-83 02:08:37 by TGRADY
; TCO 6.1750. Change PH2PIM/PH2PIX back into a BUGCHK
; UPD ID= 2753, SNARK:<6.MONITOR>PHYH2.MAC.18, 23-Jul-83 02:11:14 by MCLEAN
;TCO 6.1749 FIX WRNGUN SO IF P3 IS 0 WE DON'T GET NOIORB BUGHLT'S
; UPD ID= 2427, SNARK:<6.MONITOR>PHYH2.MAC.17, 5-May-83 20:22:04 by PAETZOLD
;TCO 6.1648 - Temporary change to help chase down PH2PIMs
; UPD ID= 2067, SNARK:<6.MONITOR>PHYH2.MAC.16, 23-Mar-83 07:12:01 by LEAPLINE
;More CI/NI changes.
; UPD ID= 1984, SNARK:<6.MONITOR>PHYH2.MAC.15, 14-Mar-83 07:19:27 by LEAPLINE
;Fix checks for CI and NI so they work together.
; UPD ID= 1931, SNARK:<6.MONITOR>PHYH2.MAC.14, 7-Mar-83 21:20:48 by CDUNN
;Change default to include KLIPA code
; UPD ID= 1886, SNARK:<6.MONITOR>PHYH2.MAC.13, 28-Feb-83 19:40:18 by PAETZOLD
;TCO 6.1529 - Remove TCO 6.1515
; UPD ID= 1831, SNARK:<6.MONITOR>PHYH2.MAC.12, 18-Feb-83 16:54:12 by PAETZOLD
;TCO 6.1515 - Add PH2DSW switch
; UPD ID= 1788, SNARK:<6.MONITOR>PHYH2.MAC.11, 11-Feb-83 04:04:09 by WACHS
;TCO 6.1501 - Don't give a PIA to a KLIPA/KLNI
; UPD ID= 1774, SNARK:<6.MONITOR>PHYH2.MAC.10, 7-Feb-83 07:58:40 by PAETZOLD
;More TCO 6.1405 - ACs in the BUG. macro are messed up
; UPD ID= 1584, SNARK:<6.MONITOR>PHYH2.MAC.9, 27-Dec-82 17:49:57 by LEAPLINE
;Change FTKLNI to KNIN
; UPD ID= 1515, SNARK:<6.MONITOR>PHYH2.MAC.8, 7-Dec-82 14:30:51 by PAETZOLD
;TCO 6.1405 - Add more additional data to the PH2PIM BUGHLT
; UPD ID= 1503, SNARK:<6.MONITOR>PHYH2.MAC.7, 1-Dec-82 15:54:52 by LEAPLINE
;TCO 6.1.XXXX Add KLNI support code under FTKLNI conditional
; UPD ID= 1411, SNARK:<6.MONITOR>PHYH2.MAC.6, 3-Nov-82 16:39:07 by MOSER
;TCO 6.1327 - CORRECTLY RESTORE PREP REGISTER AT DISMISS
; UPD ID= 1409, SNARK:<6.MONITOR>PHYH2.MAC.5, 3-Nov-82 16:36:32 by MOSER
;TCO 6.1325 - MAKE PH2PIM A BUGHLT
; UPD ID= 1015, SNARK:<6.MONITOR>PHYH2.MAC.4, 30-Jul-82 04:45:48 by WACHS
;TCO 6.1198 Changes for CI
; UPD ID= 902, SNARK:<6.MONITOR>PHYH2.MAC.3, 9-Jun-82 23:25:08 by MURPHY
;TCO 6.1147 - Move bugdefs from BUGS.MAC to here and put them in-line.
; UPD ID= 722, SNARK:<6.MONITOR>PHYH2.MAC.2, 11-May-82 04:20:09 by CDUNN
;TCO 6.1127 - Add KLIPA support, add FTKLIPA and FTCI, default to off...
; UPD ID= 502, SNARK:<5.MONITOR>PHYH2.MAC.13, 6-Mar-82 12:17:19 by PAETZOLD
;TCO 5.1748 - Make CLRCHL global
; UPD ID= 149, SNARK:<5.MONITOR>PHYH2.MAC.12, 3-Sep-81 16:48:22 by UHLER
;TCO 5.1487 - ADD EXTN FOR WREQ AND MEMSCN
; UPD ID= 148, SNARK:<5.MONITOR>PHYH2.MAC.11, 3-Sep-81 16:36:29 by UHLER
;TCO 5.1487 - ADD CODE TO DETECT CHANNEL WRITE PARITY ERRORS AND CALL MEMSCN
; UPD ID= 1621, SNARK:<5.MONITOR>PHYH2.MAC.10, 2-Mar-81 07:48:41 by WACHS
;TCO 5.1266 - ADD CODE TO REVCCW
; UPD ID= 1502, SNARK:<5.MONITOR>PHYH2.MAC.9, 27-Jan-81 10:24:54 by WACHS
; UPD ID= 1454, SNARK:<5.MONITOR>PHYH2.MAC.8, 20-Jan-81 05:51:46 by WACHS
; TCO 5.1234 - ADD ROUTINE TO REVERSE THE IOWDS FOR TAPE RETRY OPPOSITE
; UPD ID= 1363, SNARK:<5.MONITOR>PHYH2.MAC.7, 18-Dec-80 10:09:05 by WACHS
; TCO 5.1206 CHANGES FOR HANDLING TM78
; UPD ID= 953, SNARK:<5.MONITOR>PHYH2.MAC.6, 22-Aug-80 16:32:17 by LYONS
;MORE TCO 5.1062 - ALLOW A 0 PAGE ADDR IN THE RH LOGOUN AREA ONLY IF THE
;FUNCTION WAS A READ VALIDITY CHECK
; UPD ID= 574, SNARK:<5.MONITOR>PHYH2.MAC.5, 31-May-80 22:49:28 by DBELL
;MORE TCO 5.1048 - FIX BLKCNT TO HANDLE MULTIPLE CCWS
;TCO 5.1048 - ADD NEW ENTRY POINT TO RETURN ADDRESS FROM CCW WORD
; UPD ID= 483, SNARK:<4.1.MONITOR>PHYH2.MAC.92, 26-Apr-80 11:59:28 by DBELL
;TCO 4.1.1149 - CALL LOWER LEVEL ROUTINES ON HUNG DEVICE CALLS
; UPD ID= 362, SNARK:<4.1.MONITOR>PHYH2.MAC.91, 26-Mar-80 11:07:04 by DBELL
;TCO 4.1.1119 - ADD SUPPORT FOR RP20 DISKS
; COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATION 1976, 1988.
; ALL RIGHTS RESERVED.
;
; THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
; ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH THE
; INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
; COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
; OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
; TRANSFERRED.
;
; THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
; AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
; CORPORATION.
;
; DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
; SOFTWARE ON EQUIPMENT THAT IS NOT SUPPLIED BY DIGITAL.
SEARCH PROLOG ;PARAMETER FILE
TTITLE (PHYH2,,< - Channel Dependent Code For RH20 Controller>)
SUBTTL T. HESS, T. WACHS, L. BOSACK/LB 29-JUL-75
SEARCH PHYPAR ;PHYSIO PARAMETERS
EXTN <WREQ,MEMSCN>
Subttl Table of Contents
; Table of Contents for AM70-PHYH2
;
; Section Page
;
;
; 1. Parameters . . . . . . . . . . . . . . . . . . . . . . 3
; 2. Vectored interrupts on non-existant RH20 . . . . . . . 7
; 3. EPT Initialization . . . . . . . . . . . . . . . . . . 8
; 4. Initialization . . . . . . . . . . . . . . . . . . . . 9
; 5. Start I/O and Positioning . . . . . . . . . . . . . . 14
; 6. Hung and Reset Entries . . . . . . . . . . . . . . . . 15
; 7. Check Routine . . . . . . . . . . . . . . . . . . . . 16
; 8. Channel Utility Routines
; 8.1 Read Massbus Register . . . . . . . . . . . . 18
; 8.2 Write Massbus Register . . . . . . . . . . . . 20
; 8.3 Clear RAE and Channel . . . . . . . . . . . . 22
; 8.4 Start Channel . . . . . . . . . . . . . . . . 23
; 8.5 Generate CCW . . . . . . . . . . . . . . . . . 25
; 8.6 Check For Errors . . . . . . . . . . . . . . . 26
; 8.7 Compute Number of Device Blocks . . . . . . . 29
; 8.8 Reverse CCW List . . . . . . . . . . . . . . . 30
; 9. Interrupt Routine . . . . . . . . . . . . . . . . . . 32
; 10. ECC Channel Logic . . . . . . . . . . . . . . . . . . 38
; 11. End of PHYH2 . . . . . . . . . . . . . . . . . . . . . 39
SUBTTL Parameters
;RH20 REGISTERS
DO.BA2==70B5 ;SECONDARY BLOCK ADDRESS
DO.CT2==71B5 ;SECONDARY TRANSFER CONTROL
DO.BA1==72B5 ;PRIMARY BLOCK ADDRESS
DO.CT1==73B5 ;PRIMARY TRANSFER CONTROL
DO.IVI==74B5 ;INTERRUPT VECTOR INDEX
DO.RDR==75B5 ;READ REGISTER
DO.WTR==76B5 ;WRITE REGISTER
DO.DIA==77B5 ;DIAGNOSTIC CONTROL REGISTER
;DEVICE INDEPENDENT REGISTERS
DO.SR==1B5 ;STATUS REGISTER
DS.PGM=1000 ;PROGRAMMABLE PORT SWITCH ENABLED
DO.AS==4B5 ;ATTENTION SUMMARY REGISTER
DO.DA==5B5 ;DESIRED ADDRESS REGISTER
DO.DT==6B5 ;DRIVE TYPE REGISTER
DO.LR==1B6 ;LOAD REGISTER ENABLE
DO.DRE==1B9 ;DISABLE RAE STOP
;BITS IN DATAO STCR
DO2RCP==1B7 ;RESET CHANNEL PC
DO2SCS==1B10 ;STORE CHANNEL STATUS
DO2NBC==MASKB(20,29) ;NEGATIVE BLOCK COUNT
DO2RGS==MASKB(0,5) ;REGISTER SELECT FIELD
;COMMON DATAI BITS
DI.CPE==1B8 ;CONTROL BUS PARITY ERROR
DI.TRA==1B10 ;TRA (MASSBUSS SIGNAL)
DI1UNS==MASKB(15,17) ;UNIT SELECT FIELD IN PTCR
DI1FNC==MASKB(30,35) ;FUNCTION CODE IN PTCR
;LOGOUT AREA FIELDS
LG2DBP==MASKB(14,26) ;LOGOUT WORD 2 DATA BUFFER PAGE NUMBER
;DEVICE DEPENDENT DEFINITIONS IN THE CDB
RH2CNI==CDBDDP+0 ;CONI RH2,T1
RH2CNO==CDBDDP+1 ;CONO RH2,T2
RH2DTI==CDBDDP+2 ;DATAI RH2,T1
RH2DTO==CDBDDP+3 ;DATAO RH2,T2
L.RH2==CDBDDP+4-CDBINT ;LENGTH OF RH20 CDB
RH2.0==540B11 ;DEVICE CODE OF FIRST RH20
RH2.5==564B11 ;DEVICE CODE OF KLNI (5TH SLOT)
RH2.7==574B11 ;DEVICE CODE OF LAST RH20
RH2.I==0 ;EPT ADDRESS OF FIRST RH20
RH2.L==7 ;Last RH channel number
CHXFR==1B0 ;INDICATE XFER WORD
CHJMP==2B2 ;INDICATE CHANNEL JUMP
CHLST==1B1 ;INDICATE LAST XFER
CHREV==1B2 ;INDICATE REVERSE
CHCNT==MASKB(3,13) ;MASK FOR WORD COUNT IN CCW
CHADR==MASKB(14,35) ;MASK FOR PHYSICAL ADDRESS IN CCW
;CCYADR: POINT 22,T1,35 ;BYTE POINTER TO CCW ADDRESS FIELD
;CCYCNT: POINT 11,T1,13 ;BYTE POINTER TO CCW COUNT FIELD
;BITS IN CHANNEL LOGOUT AREA
CS1MPE==1B1 ;MEMORY PARITY ERROR
CS1NSE==1B2 ;NEGATION OF SBUS ERR
CS1NC0==1B3 ;NEGATION OF WORDCOUNT = 0
CS1NXM==1B4 ;NONEXISTANT MEMORY
CS1LTE==1B9 ;LAST TRANSFER ERROR
CS1RHE==1B10 ;RH20 ERROR
CS1LWC==1B11 ;LONG WORD COUNT (RH20 FINISHED BEFORE CHANNEL)
CS1SWC==1B12 ;SHORT WORD COUNT (CHANNEL FINISHED BEFORE RH20)
CS1OVR==1B13 ;OVERRUN (MBOX BUFFER)
;SOFTWARE FLAGS IN FUNCTION (USED BY CHSTRT)
ERETRY==200
ERSTRY==400
;RH20 CONI/CONO BITS
;CONI (RH)
CI.BPE==1B18 ;DATA BUS PARITY ERROR
CI.EXC==1B19 ;EXCEPTION
CI.LWE==1B20 ;LONG WORD COUNT ERROR
CI.SWE==1B21 ;SHORT WORD COUNT ERROR
CI.MBE==1B22 ;MBOX ERROR
CI.DRE==1B23 ;DRIVE RESPONSE ERROR
CI.RAE==1B24 ;REGISTER ACCESS ERROR
CI.MBH==1B25 ;MBOX HALTED
CI.OVR==1B26 ;DATA OVERRUN
CI.MEN==1B27 ;MASSBUS ENABLE
CI.ATN==1B28 ;DRIVE ATTENTION
CI.2RF==1B29 ;SECONDARY COMMAND REGISTER FULL
CI.ATE==1B30 ;ATTENTION ENABLE
CI.1RF==1B31 ;PRIMARY COMMAND REGISTER FULL
CI.DON==1B32 ;CHANNEL DONE
CI.PIA==7 ;PRIORITY ASSIGNMENT
CI.ERR==555000 ;BITS THAT CAUSE ERRORS
KLPMSK==400003,,0 ;BITS WHICH DEFINE A KLIPA/KLNI
;CONO
CO.RAE==1B24 ;CLEAR REGISTER ACCESS ERROR
CO.RST==1B25 ;CONTROLLER RESET
CO.XFR==1B26 ;CLEAR TRANSFER ERROR
CO.MEN==1B27 ;MASSBUS ENABLE
CO.RCL==1B28 ;RESET MBOX COMMAND LIST POINTER
CO.DEL==1B29 ;DELETE SECONDARY COMMAND
CO.ATE==1B30 ;ENABLE ATTENTION INTERRUPTS
CO.STP==1B31 ;STOP CURRENT COMMAND
CO.DON==1B32 ;CLEAR DONE
CO.CLR=005010 ;CLEAR BITS THAT CAUSE INTERRUPTS
;CHANNEL DISPATCH TABLE FOR RH20
RH2DSP::JRST RH2INI ;0 - INITIATION
JRST RH2STK ;1 - STACK SECOND CHANNEL COMMAND
JRST RH2SIO ;2 - START I/O
JRST RH2POS ;3 - POSITION REQUEST
JRST RH2LTM ;4 - RETURN BEST XFER
JRST RH2INT ;5 - INTERRUPT PROCESSING
JRST RH2CCW ;6 - MAKE CHANNEL XFER WORD
JRST RH2HNG ;7 - TRANSFER HUNG
JRST RH2RST ;10 - RESET CHANNEL
JRST RH2CHK ;11 - PERIODIC CHECK
JRST EXTKDB ;12 - CHECK UNIT EXISTANCE
JRST RH2CCA ;13 - EXTRACT ADDRESS FROM CCW WORD
;DUMMIES
RH2LTM: RET
SUBTTL Vectored interrupts on non-existant RH20
;RHxBAD - This routine has 8 entry points. Each entry point is
;for a different RH20 channel. We get here when the monitor gets
;an interrupt on an RH20 channel and that channel does not physically
;exist. [7463]
;
; Called by:
; We come in here by a vectored interrupt from a non-existant RH20
;
; Returns:
; Never - This routine will always BUGHLT.
RH0BAD::MOVEI T1,0 ;Interrupt from channel 0
JRST RHHALT ;Now crash
RH1BAD::MOVEI T1,1 ;Interrupt from channel 1
JRST RHHALT
RH2BAD::MOVEI T1,2 ;Interrupt from channel 2
JRST RHHALT
RH3BAD::MOVEI T1,3 ;Interrupt from channel 3
JRST RHHALT
RH4BAD::MOVEI T1,4 ;Interrupt from channel 4
JRST RHHALT
RH5BAD::MOVEI T1,5 ;Interrupt from channel 5
JRST RHHALT
RH6BAD::MOVEI T1,6 ;Interrupt from channel 6
JRST RHHALT
RH7BAD::MOVEI T1,7 ;Interrupt from channel 7
RHHALT: BUG.(HLT,RH2NXC,PHYH2,HARD,<Interrupt from non-existant RH20>,<<T1,RHCHAN>>,<
Cause: The monitor received a vectored interrupt from an RH20 channel. But
during system startup this RH20 did not exist in the configuration.
This is almost always caused by faulty hardware (ie - 2 RH20s may be
interrupting the KL simultaneously).
Action: Contact Field Service and have them find out which RH20 is faulty.
Data: RHCHAN - RH20 that requested the interrupt that does not exist.
>) ;Crash!
SUBTTL EPT Initialization
;EPTINI - This routine initializes the fourth word of each RH20
;channel. Each word is initialized to point to a routine to handle
;an interrupt on this channel when that channel does not exist.
;The fourth word of each channel will be setup properly by RH2INI when
;we return from this routine. [7463]
;
; Call with:
; no arguments
; CALL EPTINI
;
; Returns:
; +1 - Always, with each channel's vectored interrupt word setup
; to BUGHLT if the channel is not there (that is to be determined
; later in RH2INI)
;
;Clobbers no Acs!
EPTINI: SAVET ;Don't bash these
MOVE T1,[XPCW RH0ERR] ;Here's the first channel's interrupt word
MOVEI T3,RH2.I ;Point to first RH20 channel
EPTIN1: MOVE T2,T3 ;Put current channel in T2
IMULI T2,4 ;There are 4 words per RH20 channel in the EPT
ADDI T2,3 ;The vectored interrupt word is the third one
MOVEM T1,KIEPT(T2) ;Store instruction
ADDI T1,4 ;Get next address for XPCW
AOS T3 ;Do next channel
CAIG T3,RH2.L ;All channel done?
JRST EPTIN1 ;No, do next channel
RET ;Fini
SUBTTL Initialization
RH2INI: CALL EPTINI ;[7463] (/) Init the EPT with no RH20s
;[7463] Now see what RH20s exist
MOVSI Q1,(RH2.0) ;INITIAL CHANNEL DEVICE ADDRESS
PUSH P,Q1 ;SAVE ON PDL
RH2NCH: CALL DEVXCT ;SET PIA
CONO 0,CO.MEN+7
CALL DEVXCT ;READ DEVICE REGISTER
CONI 0,T1 ;STATUS INTO T1
TRNN T1,7 ;EXISTS?
JRST RH2NXT ;NO - TRY NEXT
CALL DEVXCT ;YES - DO CONTROLLER RESET
CONO 0,CO.RST ;...
AND T1,[KLPMSK] ;ONLY THOSE BITS WHICH DEFINE A KLIPA/KLNI
CAMN T1,[KLPMSK] ;IS IT ONE OF THEM?
JRST RH2NXT ;THEY MAKE THEIR OWN CDBS
CALL DEVXCT ;NOW SET MASSBUS ENABLE
CONO 0,CO.MEN
RH2NC2: MOVEI T1,L.RH2 ;GET LENGTH OF CDB
CALL PHYALC ;ALLOCATE SOME STORAGE
JRST PA1 ;FAILURE QUIT INITALIZATION
MOVEI P1,-CDBINT(T1) ;CDB BASE ADDRESS TO P1
HRRZ P4,(P) ;GET ACTUAL CHANNEL ADDRESS
MOVEM P1,CHNTAB(P4) ;SAVE CDB IN CHANNEL TABLE
HRRZM P4,CDBADR(P1) ;STORE CHNTAB INDEX
EXCH P1,P3 ;GET CDB IN P3
MOVEI T1,.BTCDB ;MARK AS CDB
DPB T1,USYBKT ; ...
EXCH P1,P3 ;RESTORE
MOVEI T1,.CTRH2 ;SET TYPE
DPB T1,CSYTYP ;..
MOVEI T1,PHYCHN ;GET PIA
DPB T1,CSYPIA ;SET PIA IN CONFIGURATION INFORMATION
MOVSI T1,(CS.STK) ;INDICATE CHANNEL CAN DO COMMAND
IORM T1,CDBSTS(P1) ;STACKING
MOVE T1,[CONO 0,CO.MEN(T2)] ;SET UP IOT'S
IOR T1,Q1 ;WITH CORRECT DEVICE CODES
MOVEM T1,RH2CNO(P1) ;STASH IN CDB
MOVE T1,[CONI 0,T1] ;CONI STATUS
IOR T1,Q1 ;SET DEVICE CODE
MOVEM T1,RH2CNI(P1) ;STORE IN CDB
MOVE T1,[DATAO 0,T2] ;DATAO INSTRUCTION
IOR T1,Q1 ;SET DEVICE CODE
MOVEM T1,RH2DTO(P1) ;STASH IN CDB
MOVE T1,[DATAI 0,T1] ;DATAI INSTRUCTION
IOR T1,Q1 ;SET DEVICE CODE
MOVEM T1,RH2DTI(P1) ;INTO CDB
HRRZ T1,(P) ;GET RH NUMBER
LSH T1,2 ;TIMES 4
MOVEI T2,KIEPT+3(T1) ;IN UNUSED LOGOUT AREA
HRLZM T2,CDBICP(P1) ;AND STORE AS INTERRUPT VECOTOR
MOVEI T3,CDBINT(P1) ;ADDRESS FOR XPCW ON INTERRUPT
HRLI T3,(<XPCW>) ;BUILD INSTRUCTION
MOVEM T3,0(T2) ;STORE IN PAGE 0
MOVEI T3,CDBINT+4(P1) ;SET JUMP ADDRESS
MOVEM T3,CDBINT+3(P1) ;SET IN XFER VECTOR
SETZM CDBINT+2(P1) ;SET FLAGS TO 0
ADDI T1,RH2.I+KIEPT ;ADDRESS OF CHANNEL ICP AREA
HRRM T1,CDBICP(P1) ;STASH IN CDB
MOVE T1,[MOVEM P1,CDBSVQ]
ADDI T1,0(P1) ;INSTRUCTION TO STORE P1 IN CDB
MOVEM T1,CDBINT+4(P1) ;BUILD INTERRUPT CODE
MOVE T1,[JSP P1,PHYINT]
MOVEM T1,CDBINT+5(P1) ;DISPATCH TO PHYSIO
MOVE T1,[BLT 17,17] ;INSTRUCTION TO RESTORE ACCUMULATORS
MOVEM T1,CDBJEN(P1) ;PUT IN CDB
MOVEI T1,CDBRST(P1) ;BUILD DATAO CDBRST, TO RESET THE
HRLI T1,(DATAO 0,0) ; RH20 PREPARATION REGISTER
IOR T1,Q1
MOVEM T1,CDBJEN+1(P1) ;STORE IT IN THE EXIT SEQUENCE
MOVEI T1,CDBINT(P1) ;ADDRESS OF INTERRUPT PC
HRLI T1,(<XJEN 0>) ;BUILD XJEN INSTRUCTION
MOVEM T1,CDBJEN+2(P1) ;STORE
MOVEI T1,RH2DSP ;INSERT DISPATCH VECTOR
MOVEM T1,CDBDSP(P1) ;SET UP DISPATCH
;NOW FIND UNITS & TYPES
MOVE Q3,[-MAXRH,,CDBUDB] ;AOBJN POINTER TO UDB TABLE
ADDI Q3,0(P1) ;RELOCATE POINTER
MOVEM Q3,CDBCUN(P1) ;STORE IN CDB
MOVEM Q3,CDBIUN(P1) ;...
SETOM CDBXFR(P1) ;INDICATE CHANNEL FREE
MOVEI Q2,0 ;FIRST UNIT #
RH2UNL: MOVEI T2,CO.RAE ;RESET RAE (IN CASE)
XCT RH2CNO(P1)
SETZM P3 ;IN CASE NOT WANTED
SETOM P5 ;INDICATE TO CREATE ALL UDBS AND KDBS
CALL RH2UNS ;SEARCH UNIT TYPE
RH2NXU: MOVEM P3,0(Q3) ;STORE IN CDB IF ANY (0 IF NONE)
AOS Q2 ;NEXT UNIT #
AOBJN Q3,RH2UNL ;KEEP GOING
MOVEI T2,CO.RAE ;CLEAR REGISTER ACCESS ERROR
XCT RH2CNO(P1) ;...
SETOM CDBCAD(P1) ;CLEAR THIS WORD SINCE RH2RST WON'T
MOVEI T1,0 ;CONTROLLER ONLY RESET
CALL RH2RST ; ...
; MOVE T1,CDBIUN(P1) ;CHECK IF ANY DEVICES FOUND.
;RH2CKU: SKIPE (T1) ;UNIT PRESENT?
; JRST RH2NXT ;YES, GO ON TO NEXT CHANNEL
; AOBJN T1,RH2CKU ;NO, LOOP FOR MORE
; MOVSI T1,(CS.OFL) ;NONE PRESENT, MARK OFFLINE.
; IORM T1,CDBSTS(P1) ; ...
; MOVE Q1,(P) ;RECOVER DEVXCT ARGUMENT
; CALL DEVXCT ;COMPLETELY DISABLE RH
; CONO 0,0 ; ...
RH2NXT: AOS Q1,0(P) ;RESTORE DEVICE CODE
ADD Q1,[4B11] ;ADVANCE TO NEXT CHANNEL
MOVEM Q1,0(P) ;STASH NEW ADDRESS
TRZ Q1,-1 ;CLEAR CHANNEL #
CAMLE Q1,[RH2.7] ;BEYOND LAST?
AOJA P4,PA1 ;INCR MAXCHN AND EXIT
JRST RH2NCH ;TRY NEXT
;
; ROUTINE TO DETERMINE THE TYPE OF DISK/TAPE
;
;
RH2UNS::MOVSI T2,(DO.DT) ;DEVICE TYPE REGISTER
TLO T2,(Q2) ;SET UNIT NUMBER
XCT RH2DTO(P1) ;SEND OUT
XCT RH2DTI(P1) ;AND READ BACK
TLNN T1,(DI.TRA) ;NORMAL RESPONSE?
JRST RH2US1 ;NO - GO CLEAR RAE AND EXIT
LDB T1,[POINT 9,T1,35] ;GET DEVICE TYPE CODE
JUMPE T1,[ MOVSI T2,(DO.SR) ;TRY TO GET THE PORT AGAIN THIS TIME WE MISSED
TLO T2,(Q2) ;READ THE STATUS REGISTER
XCT RH2DTO(P1) ;SEND OUT REQUEST
XCT RH2DTI(P1) ;GET STATUS BACK
TLNN T1,(DI.TRA) ;CHECK FOR ERROR
JRST RH2US1 ;CLEAR ERROR
TRNN T1,DS.PGM ;CHECK FOR PGM MODE
RET ;NOT IN PGM FORGET IT
JRST RH2UNS] ;WAIT TILL WE CAN READ DRIVE TYPE REGISTER
CAIG T1,TY.RPH ;WITHING RP04,5,6 RANGE?
CAIGE T1,TY.RPL ; ??
SKIPA ;NO.
JRST RH2IRP ;YES - INITIALIZE IT
CAIN T1,TY.RS4 ;RS04 TYPE?
JRST RH2IRS ;YES - INITIALIZE IT
CAIN T1,TY.DXA ;DX20A TYPE?
JRST RH2IDA ;YES - INITIALIZE IT
CAIN T1,TY.DXB ;DX20B TYPE?
JRST RH2IDB ;YES - INITIALIZE IT
CAIG T1,TY.T3H ;WITHIN TM03 RANGE
CAIGE T1,TY.T3L ; ???
SKIPA ;NO
JRST RH2ITM ;YES
CAIG T1,TY.T2H ;GREATER THAN HIGHEST TM02 TYPE
CAIGE T1,TY.T2L ;OR LOWER THAN LOWEST?
SKIPA ;YES - NOT TM02
JRST RH2ITM ;IS TM02 - GO INITIALIZE
CAIN T1,TY.T78 ;TM78 TYPE?
JRST RH2IT8 ;YES, INITIALIZE IT
RET ;NOT A KNOWN DEVICE
;HERE IF UNIT WAS NONEXISTANT
RH2US1: MOVEI T2,CO.RAE ;CLEAR RAE
XCT RH2CNO(P1) ; ...
RET ;RETURN
;ROUTINE TO INVOKE RP04/RS04 INITIATION
RH2IRS: SKIPA T1,[.UTRS4] ;RS04 TYPE
RH2IRP: MOVEI T1,.UTRP4 ;RP04 TYPE
CALL FNDUTP ;FIND TABLE ENTRY
CALL UDSINI(T1) ;CALL INITIALIZE IF FOUND
RET ;ADVANCE TO NEXT UNIT
;HERE TO INITIALIZE A DX20
RH2IDA: SKIPA T1,[.UTDXA] ;SEARCH FOR DX20A (TAPE CONTROLLER)
RH2IDB: MOVEI T1,.UTDXB ;OR FOR DX20B (DISK CONTROLLER)
JRST RH2ITD ;GO SEARCH FOR DX20
;HERE TO INITIALIZE A TM02/3
RH2ITM: MOVEI T1,.UTTM2 ;SEARCH FOR TM02
RH2ITD: MOVEI P2,0 ;IN CASE NOT FOUND IN TABLES
CALL FNDUTP ; ...
CALL UDSINI(T1) ;FOUND - CALL INITIALIZE, RETURN KDB IN P2
MOVE P3,P2 ;COPY KDB TO WHERE COMMON CODE WANTS IT
RET ;LOOP FOR MORE
;HERE TO INITIALIZE A TM78
RH2IT8: MOVEI T1,.UTTM7 ;SEARCH FOR TM78
JRST RH2ITD ;GO SEARCH
;ROUTINE USED TO EXECUTE IOT FOUND AT CALL+1
;NOTE - INSTRUCTION MUST NOT CAUSE SKIP!
DEVXCT: MOVE T4,@(P) ;FETCH IOT
IOR T4,Q1 ;OR IN DEVICE CODE
XCT T4 ;EXECUTE IT
RETSKP ;RETURN - SKIP OVER INSTRUCTION
;ROUTINE TO SCAN CHANNEL/UNIT TABLES FOR TYPE GIVEN IN T1
;RETURNS TABLE ENTRY IN T1 (SKIP RETURN ON NOT FOUND)
FNDUTP: MOVE T2,[PHYUNL,,PHYUNT] ;ENTRY FOR UNIT TABLE
FNDTPL: HLRZ T3,0(T2) ;GET LH = TYPE CODE
CAME T1,T3 ;TYPES MATCH?
AOBJN T2,FNDTPL ;NO - TRY NEXT
JUMPGE T2,RSKP ;SKIP RETURN IF NO MATCH
HRRZ T1,0(T2) ;MATCH - GET DISPATCH ADDRESS
RET ;RETURN
SUBTTL Start I/O and Positioning
;HERE TO START POSITIONING (P3 := UDB)
RH2POS: HRRZ T1,UDBDSP(P3) ;ADDRESS OF DEVICE ROUTINE
CALLRET UDSPOS(T1) ;START IT
;HERE TO START ACTUAL OPERATION (P3 := UDB , P4 := IORB)
RH2SIO: HRRZ T1,CDBICP(P1) ;GET STATUS AREA
SETZM 1(T1) ;CLEAR CS1
HRRZ T1,UDBDSP(P3) ;DISPATCH TO DEVICE CODE
CALL UDSSIO(T1) ;ATTEMPT TO START IO
JRST CLRCHL ;LOSE
RETSKP ;WIN
;HERE TO STACK A SECOND COMMAND TO THE RH20
RH2STK: HRRZ T1,UDBDSP(P3) ;GET UNIT DISPATCH
CALLRET UDSSTK(T1)
SUBTTL Hung and Reset Entries
;HERE ON A HUNG TRANSFER
;CALLED WITH PI OFF
RH2HNG: MOVEI T1,1 ;[7.1213] Full reset to prevent ILLGOs
CALL RH2RST ;RESET THE RH20
HRRZ T1,UDBDSP(P3) ;GET DISPATCH ADDRESS
CALLRET UDSHNG(T1) ;RESET CONTROLLER AND UNIT ALSO
;HERE TO RESET THE CHANNEL AND ALL UNITS
;T1/ 0 TO RESET JUST THE CHANNEL
;T1/ 1 FOR FULL RESET
RH2RST: SKIPE T4,T1 ;COPY ARG TO SAFE PLACE
SETOM CDBCAD(P1) ;CLEAR PRIMARY CCW ADDRESS ONLY IF FULL RESET
SETOM CDBCAD+1(P1) ;ALWAYS CLEAR SECONDARY ADDRESS
MOVEI T1,CO.DEL!CO.DON ;DELETE ANY SECONDARY COMMAND
CALL CHNCNO ;DO CONO
MOVEI T1,CO.STP ;STOP ANY TRANSFER
CALL CHNCNO ;DO CONO
MOVEI T2,CO.RST ;CONO RESET
SKIPE T4 ;IF GENTLE RESET, SKIP MBINIT
XCT RH2CNO(P1) ;DO CONO DIRECTLY
HLRZ T2,CDBICP(P1) ;SETUP INTERRUPT VECTOR ADDRESS
HRLI T2,(DO.IVI)
CALL WTREGX ;WRITE IN CONTROLLER
CALLRET CLRCHL ;AND REINIT CHANNEL
SUBTTL Check Routine
;HERE EVERY NOW AND THEN (ABOUT 1 SEC) TO CHECK PIA.
RH2CHK: MOVE T1,CDBSTS(P1) ;GET STATUS BITS
TXNE T1,CS.OFL ;IS RH20 MARKED OFFLINE?
RET ;YES, DON'T CHECK ANYTHING
XCT RH2CNI(P1) ;GET CONI
MOVE T3,T1 ;SAVE THE CONI WORD IN A SAFE PLACE
ANDI T1,7 ;MASK PIA
LDB T2,CSYPIA ;GET WHAT IT SHOULD BE
CAMN T1,T2 ;ARE THEY THE SAME?
RET ;YES
; Temporary
; In the never ending search for the PH2PIMs another wonderful diagnostic
; routine.
MOVE T4,T3 ;SAVE THE FIRST CONI
XCT RH2CNI(P1) ;GET THE CONI AGAIN
MOVE T3,T1 ;SAVE THE CONI WORD
ANDI T1,7 ;GET THE PI BITS
LDB T2,CSYPIA ;GET WHAT IT SHOULD BE
CAME T1,T2 ;ARE THEY THE SAME
JRST RH2CH1 ;NO SO IT IS SOLID
HRRZ T1,CDBADR(P1) ;GET CHANNEL NUMBER
BUG.(CHK,PH2PIX,PHYH2,HARD,<PHYH2 - RH20 returned from the twilight zone>,<<T1,CHAN>,<T3,CONI>,<T4,OLD>,<T2,PIA>>,<
Cause: The routine RH2CHK was called for a periodic check on the status of the
channel, and found that the PI assignment for the channel was not what
was expected. A second check of the channel status found the correct
PI assignment.
Action: Call Field Service and have them check the channel listed as the first
item of additional data.
Data: CHAN - The channel number
CONI - The results of the final CONI on the RH
OLD - The results of the first CONI on the RH
PIA - The PI assignment we expected to see
>)
RET ;IT GOT BETTER, SOMEHOW.
RH2CH1:
HRRZ T1,CDBADR(P1) ;GET CHANNEL #
BUG.(CHK,PH2PIM,PHYH2,HARD,<PHYH2 - RH20 lost PI assignment>,<<T1,CHAN>,<T3,CONI>,<T2,PIA>>,<
Cause: The routine RH2CHK was called for a periodic check on the status of the
RH20, and it discovered that the channel assignment of the RH20 changed
from what it should be. This usually indicates a hardware malfunction.
This situation is serious as it could cause file structure damage.
Action: Call Field Service and have them check out the channel listed in the
additional data.
Data: CHAN - The channel number
CONI - The results of the CONI on the RH
PIA - The PI assignment we expected to see but did not see
>,,<DB%NND>) ;[7.1210]
LDB T2,CSYPIA ;GET CORRECT PIA
MOVSI T1,(CS.ACT) ;IS CHANNEL ACTIVE?
TDNN T1,CDBSTS(P1) ; ??
TRO T2,CO.ATE ;NO, SET ATTENTION EN
XCT RH2CNO(P1) ;SEND TO CHANNEL
RET
SUBTTL Channel Utility Routines -- Read Massbus Register
;ROUTINE TO READ A MASS-BUSS REGISTER
;CALL - C(T2) := REGISTER TO BE READ
; C(P3) := UDB POINTER
; C(P1) := CDB POINTER
;RETURNS VALUE IN T1 , PRESERVES T4
RDREG:: HRRZ T3,UDBAKA(P3) ;GET UNIT #
SKIPL T2 ;INTERNAL REGISTER?
TLO T2,(DO.DRE) ;NO - TRY FIRST WITH DRAES ON
TLOA T2,(T3) ;SET UNIT NUMBER
RDREG3::TLO T2,<(DO.DRE)>(Q2) ;UNIT # IN Q2
RDREGX: MOVEI T3,^D10 ;INITIALIZE RETRY COUNTER
RDREGL: XCT RH2DTO(P1) ;DATAO RH2,T2
XCT RH2DTI(P1) ;NOW READ REGISTER (DATAI RH2,T1)
PUSH P,T1 ;SAVE RESULT
XCT RH2CNI(P1) ;GET CONI
TRNE T1,CI.RAE ;REGISTER ACC ERR?
JRST RDRAE ;YES - BAD NEWS
RDRAE1: POP P,T1 ;NO - RESTORE RESULT
SKIPGE T2 ;READING AN INTERNAL RH REGISTER?
RET ;YES - DONE
TLNN T1,(DI.CPE) ;CONTROL BUS PAR ERR?
TLNN T1,(DI.TRA) ;OR NOT TRA
JRST RDREGE ;YES - ERROR
RDEXIT: ANDI T1,177777 ; CLEAR OUT GARBAGE
RET ;EXIT
;HERE WHEN CBPE OR MISSING TRA
RDREGE: SOJG T3,RDREGL ;LOOP IF RETRY STILL POSITIVE
TLZ T2,(DO.DRE) ;TRY ONE MORE TIME - IF RAE, BOMB WORLD
JUMPL T3,RDEXIT ;IF NOW NEGATIVE, DEPART, TRAGIC ERROR
JRST RDREGL ;TRY AGAIN
;HERE WHEN A REGISTER ACCESS ERROR IS DETECTED
RDRAE: PUSH P,T2 ;SAVE ANOTHER REGISTER
TLNE T2,(DO.DRE) ;DRAES?
JRST RDRAE2 ;YES - JUST CLEAR RAE
MOVE T2,T1 ;COPY CONI
XCT RH2DTI(P1) ;GET DATAI
PUSH P,T3
HRRZ T3,CDBADR(P1)
BUG.(CHK,P2RAE1,PHYH2,HARD,<PHYH2 - RH20 register access error reading register>,<<T1,DATAI>,<T2,CONI>,<T3,CHAN>>,<
Cause: The routine RDREG was called to read a MASSBUS register, but the read
failed due to a register access error from the RH20. This is almost
always due to a hardware malfunction. It can also happen when a RP06
LAP (Logical Address Plug) is removed or inserted.
Action: Call Field Service if this is seen unless RP06 LAPs are being removed
or inserted.
Data: DATAI - The result of a DATAI done after the error was detected
CONI - The CONI which showed the register access error
CHAN - The channel number
>,,<DB%NND>) ;[7.1210]
POP P,T3
CALL CLRRAE ;RESET RAE
POP P,T2 ;RESTORE REGISTERS
POP P,T1 ; ...
JRST RDEXIT ;ALL WE COULD DO...
RDRAE2: CALL CLRRAE ;CLEAR ERROR
POP P,T2
JRST RDRAE1 ;CONTINUE ATTEMPT
SUBTTL Channel Utility Routines -- Write Massbus Register
;ROUTINE TO WRITE A MASS-BUSS REGISTER
;CALL - C(T2) := REGISTER TO BE WRITTEN & DATA
; C(P1) := CDB , C(P3) := UDB
;PRESERVES T1,T4
WTREG:: HRRZ T3,UDBAKA(P3) ;GET UNIT #
TLOA T2,<(DO.LR)>(T3) ;SET IN LHS AND LR ENABLE
WTREG3::TLO T2,<(DO.LR)>(Q2) ;SET LR AND UNIT NUMBER FROM Q2
WTREGX: TLO T2,(DO.LR) ;WRITE A REGISTER WHEN THE DRIVE NUMBER DOESNT MATTER
XCT RH2DTO(P1) ;ZAP
PUSH P,T1 ;SAVE REGISTER
XCT RH2CNI(P1) ;GET CONI
TRNE T1,CI.RAE ;REGISTER ACC ERR?
JRST WTRAE ;YES - BAD NEWS
POP P,T1 ;NO - RESTORE REGISTER
RET ;RETURN
;HERE WHEN RAE ON WRITE
WTRAE: PUSH P,T3 ;SAVE REGISTER
MOVE T3,T1 ;COPY CONI
XCT RH2DTI(P1) ;GET DATAI
PUSH P,T4
HRRZ T4,CDBADR(P1) ;GET CHANNEL NUMBER
BUG.(CHK,P2RAE2,PHYH2,HARD,<PHYH2 - Register access error writing register>,<<T1,DATAI>,<T2,DATA>,<T3,CONI>,<T4,CHAN>>,<
Cause: The routine WTREG was called to write a MASSBUS register, but the write
failed due to a register access error from the RH20. This is almost
always due to a hardware malfunction. It can also happen when a RP06
LAP (Logical Address Plug) is removed or inserted.
Action: Call Field Service if this is seen unless RP06 LAPs are being removed
or inserted.
Data: DATAI - The result of a DATAI done after the error was detected
DATA - The register and data that was attempted to be written
CONI - The CONI which showed the register access error
CHAN - The channel number
>,,<DB%NND>) ;[7.1210]
POP P,T4 ;RESTORE REG
MOVE T3,T2 ;SAVE ATTEMPTED REGISTER
CALL CLRRAE ;CLEAR RAE
MOVE T2,T3 ;RESTORE
POP P,T3 ;RESTORE
POP P,T1
RET
SUBTTL Channel Utility Routines -- Clear RAE and Channel
;HERE TO CLEAR RAE
;USES ONLY T2.
CLRRAE: LDB T2,CSYPIA ;GET PIA
TRO T2,CO.RAE ;CLEAR RAE
XCT RH2CNO(P1) ;DO CLEAR
RET
;ROUTINE TO CLEAR RH20 CONTROLLER OR DO A CONO
;PRESERVES T4
CLRCHL:: MOVEI T1,CO.CLR!CO.ATE ;ENABLE FOR ALL INTERRUPTS
CHNCNO: LDB T2,CSYPIA ;GET PI ASSIGNMENT
IOR T2,T1 ;BUILD CONO
XCT RH2CNO(P1) ;...
RET ;RETURN
SUBTTL Channel Utility Routines -- Start Channel
;ROUTINE TO START CHANNEL I/O
;CALLED WITH PI OFF
;C(T2) := DATAO , C(Q1) := FUNCTION , C(P3) := UDB POINTER
;C(Q1) = -1 IMPLIES ONLY DATAO FROM T2
;GIVES SKIP RETURN TO SHOW ALL OK
CHSTRT::SKIPE T2 ;CHECK FOR VALID OPS
SKIPN Q1 ; ...
BUG.(HLT,RH2ICF,PHYH2,SOFT,<PHYRH2 - Invalid channel function>,,<
Cause: The routine CHSTRT was called to start I/O on the channel, but the
supplied arguments were illegal. Either no DATAO word was specified,
or the function code was zero.
>)
HRRZ T1,UDBAKA(P3) ;GET UNIT NUMBER
SKIPL CDBXFR(P1) ;IF NON DATA TRANSFER
CAMN T1,CDBXFR(P1) ;OR SAME AS UNIT HOLDING CHANNEL
SKIPA Q2,[CO.ATE] ;CONSIDER ATTENTION ENABLE
MOVEI Q2,0 ;ELSE DISABLE ATTENTION INTERRUPTS
CAMN Q1,[EXP -1] ;NON CHANNEL FUNCTION?
JRST [ MOVEI Q1,0 ;YES
JRST CHST1] ;DO JUST ONE DATAO
CAIGE Q1,50 ;DATA TRANSFER OPERATION?
JRST CHST1 ;NO
MOVEI Q2,0 ;OPERATION USES CHANNEL, DISABLE ATTENTION
PUSH P,T2 ;SAVE DATAO
MOVX T2,CS.CWP ;GET CHANNEL WRITE PARITY ERROR BIT
ANDCAM T2,CDBSTS(P1) ;CLEAR IT IN THE CDB
TRZE Q1,ERSTRY ;CHAN LIST ALREADY SET UP?
JRST CHST0 ;YES, SKIP SETUP
MOVSI T2,(CS.ACL) ;TOGGLE CCW LIST
XORM T2,CDBSTS(P1) ; ..
MOVEI T1,CDBCCL(P1) ;DO SETUP
MOVEI T2,CDBCCL+1(P1)
TRZN Q1,ERETRY ;ECC RETRY?
CALL PHYXFL ;NO - GET HEAD OF TRANSFER LIST
MOVE T4,T1 ;REMEMBER BEGINNING OF LIST
HRL T4,T2 ;AND END OF LIST
MOVEI T3,CDBCAD(P1) ;GET ADDRESS OF PRIMARY CCW ADDRESS WORD
SKIPL 0(T3) ;IS IT IN USE?
AOS T3 ;YES, STEP ADDRESS TO SECONDARY CCW ADDRESS WRD
HRRZM T1,0(T3) ;STORE CCW ADDRESS IN APPROPRIATE WORD
SETMM (T1) ;INSURE REFERENCE
MAP T1,(T1) ;GET PHYSICAL ADDRESS
TLZ T1,777760 ;FLUSH ACCESS BITS ETC
TLO T1,(CHJMP) ;BUILD CHANNEL JUMP
HRRZ T3,CDBICP(P1) ;AND STORE IN
MOVEM T1,(T3) ;CHANNEL ICPC
MOVSI T3,(CHLST) ;SET LAST TRANSFER
IORM T3,-1(T2) ;IN CCW LIST
MOVE T1,T4 ;RESTORE TRANSFER LIST POINTER
CHST0: CALL BLKCNT ;GET BLOCK COUNT FROM TRANSFER LIST
MOVNS T1 ;AS NEGATIVE NUMBER
STOR T1,DO2NBC,Q1 ;STORE IN DATAO STCR
TXO Q1,DO.CT2!DO2RCP!DO2SCS ;FINISH STCR DATAO
POP P,T2 ;RECOVER DATAO
LOAD T1,DO2RGS,T2 ;GET REGISTER
CAIN T1,<(DO.DA)>_-^D12 ;DESIRED ADDRESS?
TLC T2,(75B5) ;YES XOR TO PRODUCE SBAR
CHST1: HRRZ T3,UDBAKA(P3) ;GET UNIT ADDRESS
TLO T2,<(DO.LR)>(T3) ;SET UNIT AND LOAD
XCT RH2DTO(P1) ;WRITE REG
JUMPE Q1,CHST2 ;SECOND DATAO TO DO?
MOVE T2,Q1 ;YES - GET CONTROL REGISTER
TLO T2,<(DO.LR)>(T3) ;SET UNIT AND LOAD
MOVEM T2,CDBICR(P1) ;SAVE INITIAL TCR FOR LOGGER
XCT RH2DTO(P1) ;WRITE REG
MOVEI T1,4 ;DELAY **TEMP**
SOJG T1,. ; **TEMP**
CHST2: LDB T2,CSYPIA ;GET PI ASSIGNMENT
IOR T2,Q2 ;SET ATTENTION ENABLE IF DECIDED ABOVE
XCT RH2CNO(P1) ;DO CONO
RETSKP ;INDICATE SUCCESS
SUBTTL Channel Utility Routines -- Generate CCW
;ROUTINE TO GENERATE A CHANNEL XFER WORD FOR THE RH20
;CALL - C(T1) := MODE,,+COUNT(1B0 IF BACKWARDS) , C(T2) := PHYSICAL-ADDRESS
;RETURNS+1(ALWAYS):
;T1/ CCW FOR THIS TRANSFER
;NOTE: THE MAXIMUM TRANSFER WHICH WILL ALWAYS WORK IS 1 PAGE.
; THE CALLER IS EXPECTED TO WORRY ABOUT PAGE CROSSING PROBLEMS
RH2CCW: PUSH P,T1 ;SAVE ARGUMENT
HRRZ T3,T1 ;GET WORD COUNT
HLRZS T1 ;GET MODE IN CORRECT PLACE
TRZ T1,(1B0) ;CLEAR BACKWARDS BIT FROM MODE
CAIN T1,IRMWRD ;SPECIAL CASE CHECK FOR COMMON CASE
JRST RH2CW1 ;IS WORD MODE, DO IT FAST
SKIPLE T1 ;CHECK MODE FOR LEGALITY
CAILE T1,IRMMAX ; ...
JRST [ BUG.(CHK,PH2IHM,PHYH2,SOFT,<PHYH2 - Illegal hardware mode - word mode assumed>,,<
Cause: The routine RH2CCW was called to generate a channel transfer word, and
one of it's arguments is the data mode to use. But the data mode
supplied was illegal.
>,,<DB%NND>) ;[7.1210]
MOVEI T1,IRMWRD ;ASSUME WORD MODE
JRST .+1]
IDIV T3,MODTAB(T1) ;CONVERT TO WORDS
SKIPE T4 ;ROUND?
AOS T3 ;YES
RH2CW1: POP P,T4 ;GET ARGUMENT BACK
MOVSI T1,(CHXFR) ;BUILD CCW
STOR T3,CHCNT,T1 ;STORE COUNT IN T1
STOR T2,CHADR,T1 ;STORE ADDRESS IN T1
SKIPGE T4 ;BACKWARDS?
TLO T1,(CHREV) ;YES
RET ;RETURN
;RH2CCA - EXTRACT THE PHYSICAL MEMORY ADDRESS FROM A CCW TRANSFER WORD.
;ARGUMENT:
; T1/ CCW WORD
;RETURNS:
; T1/ ADDRESS, OR ZERO IF NONE
RH2CCA: LOAD T1,CHADR,T1 ;GET PHYSICAL ADDRESS FROM CCW
RET ;DONE
SUBTTL Channel Utility Routines -- Check For Errors
;ROUTINE TO DETERMINE IF ANY CHANNEL DEPENDENT ERROR OCCURED.
;NOTICE: CONI OVERRUNS (LONG WORD COUNTS) ARE IGNORED IF THE TRANSFER WAS
;TO A DISK AND THE LENGTH OF THE TRANSFER WAS NOT AN EXACT MULTIPLE OF
;THE SECTOR SIZE. (IN THIS CASE, WE EXPECT THE LONG WORD COUNT).
;RETURN +1 IF ERROR , +2 IF NONE
CKERR:: MOVE T2,CDBCNI(P1) ;GET CONI AT INTERRUPT
ANDI T2,CI.ERR ;ANY ERRORS?
HRRZ T1,CDBICP(P1) ;CHECK CHANNEL
SKIPN T1,1(T1) ;GET STATUS WORD 1
JUMPE T2,RSKP ;IF NO LOGOUT AND NO CONI ERRS, GOOD XFR
JUMPN T2,[CAIN T2,CI.OVR ;CONI ERRORS, ONLY OVERRUN?
TXNN T1,CS1SWC ;AND WORD LENGTH ERROR FROM LOGOUT?
CALL CKERR1 ;NO, FLAG AN ERROR
JRST .+1] ;PROCEED
TXNE T1,CS1NSE ;SBUS ERROR?
TXNE T1,CS1MPE!CS1NXM!CS1RHE!CS1OVR ;OR OTHER DEFINITE ERRORS?
JRST [ TXNE T1,CS1MPE ;YES, A PARITY ERROR?
AOS CDBPAR(P1) ;YES - NOTE
TXNE T1,CS1NXM ;NONEXISTANT MEMORY?
AOS CDBNXM(P1) ;YES - NOTE
TXNE T1,CS1OVR ;AN OVERRUN?
AOS CDBOVR(P1) ;YES - NOTE
CALL CKERR1 ;INDICATE SOME ERROR HAPPENED
JRST .+1] ;AND CONTINUE WITH LENGTH ANALYSIS
MOVX T2,CS1LWC!CS1SWC ;WORD COUNT ERROR BITS
MOVE T3,UDBSTS(P3) ;GET STATUS BITS
TXNE T3,US.TAP ;MAGTAPE?
TXZ T2,CS1LWC ;YES - IGNORE RECORD SHORTER THAN BUFFER
TDNN T1,T2 ;LENGTH ERROR?
JRST CKERR2 ;NO - CHECK COUNT FROM LOGOUT AREA
TXNN T1,CS1LWC ;RECORD TOO SHORT?
TXNN T3,US.DSK ;OR NOT A DISK?
JRST CKERR3 ;YES, THEN MARK THE ERROR
CALL PHYCNT ;GET LENGTH OF TRANSFER WE TRIED
MOVEI T2,PGSIZ ;AND SIZE OF A PAGE
MOVE T3,UDBSIZ(P3) ;GET POINTER TO SIZE TABLE
IDIV T2,SECPAG(T3) ;COMPUTE LENGTH OF DISK SECTOR
TRNE T1,-1(T2) ;IS THE LENGTH ERROR TO BE EXPECTED?
JRST CKERR2 ;YES, THAT'S OK THEN
CKERR3: MOVX T1,IS.RTL ;FLAG LENGTH ERROR IN IORB
IORM T1,IRBSTS(P4) ; ...
CKERR1: MOVX T2,IS.DVE ;DECLARE A DEVICE ERROR
IORM T2,IRBSTS(P4) ; ...
RET
CKERR2: MOVX T1,IS.DVE ;WERE ANY ERRORS DETECTED ALREADY?
TDNE T1,IRBSTS(P4) ; ???
RET ;YES - ERROR
SKIPL 0(P4) ;CHECK FOR SHORT IORB
RETSKP ;RETURN OK FOR LONG ONES
HRRZ T1,CDBICP(P1) ;GET ADDRESS OF LOGOUT
MOVE T1,2(T1) ;GET ADDRESS OF LOGOUT DONE
MOVEI T4,-CST5(P4) ;GET ADDRESS TO FINISH AT
LOAD T3,LG2DBP,T1 ;PAGE NUMBER FROM LOGOUT
SOSL T3 ;[8855] Get page (off by one)
ANDX T3,<PHCPNO_<-PGSFT>> ;[8855] Retain modulo 22 bits (but not if page 0)
CAMN T3,T4 ;[8855] Better be the same
IFSKP. ;[8855] If not,
LDB T1,IRYFCN ;[8855] Get the function code
CAIN T1,IRFRVC ;[8855] Read validity?
AOSE T3 ;[8855] Was it for page 0 (skip function)?
BUG.(HLT,ILLGO,PHYH2,HARD,<Invalid channel logout>,,<
Cause: The routine CKERR was called to check for channel errors after an I/O
operation. The operation supposedly succeeded according to the IORB
status bits. But in verifying for a short style IORB that the I/O was
done correctly, the page number contained in the channel logout area
did not match the number of the page on which the IORB wanted to
perform I/O.
Action: This is usually caused by a RH20 or drive problem. Have Field Service
check the hardware, particularly the RH20 and RP0x DCL.
>) ;[8855]
ENDIF. ;[8855]
RETSKP ;[8855] Page matches or page 0
;ROUTINE TO GET CONI AND DATAI'S ON ERROR
;RETURNS T1=CONI, T2=PTCR, T3=PBAR
ERRCNI::HRRZ T1,CDBICP(P1) ;GET CHANNEL LOGOUT AREA
DMOVE T2,(T1) ; CS0,1
DMOVEM T2,CDBCS0(P1) ;SAVE
TXNE T3,CS1NSE ;A NON-SPECIFIC MEMORY ERROR?
TXNE T3,CS1MPE!CS1NXM ;ANY MEMORY ERRORS?
CALL [ JUMPGE T3,R ;IF NO STATUS, NO REPORT
SAVET ;YES. SAVE TEMPS
MOVE T2,T3 ;COPY STATUS 1
MOVE T3,2(T1) ;GET UPDATED CCW
CAMN T3,CDBCS2(P1) ;PREVIOUS ERROR ON SAME PAGE?
CAME T2,CDBCS0(P1) ;AND A MEM ERROR ALSO?
SKIPA ;NO. REPORT THIS ONE THEM
RET ;YES. NO REPOORTING RETRIES
HRRZ T1,CDBADR(P1) ;GET CHANNEL #
LSH T1,2 ;*4
ADDI T1,<RH2.0>_<11-35>
CALLRET APRRPT] ;AND DO REPORT
MOVE T2,2(T1) ;GET CS2
MOVEM T2,CDBCS2(P1) ;SAVE
MOVE T1,(T1) ;GET ICCW
TLNN T1,(CHXFR) ;IF NOT A JUMP,
JRST ERCNI1 ;DONT TRY FOR CCWS
LOAD T1,CHADR,T1 ;GET ADDRESS PART OF JUMP
LSH T1,-PGSFT ;AS A PAGE
PIOFF ;INTERLOCK WINDOW
CALL MAPRCA ;MAP THIS PAGE
HRRZ T2,CDBICP(P1) ;GET CHAN BLOCK AGAIN
MOVE T3,(T2) ;GET JUMP CCW BACK
ANDI T3,777 ;GET ADDRESS WITHIN PAGE
ADD T3,T1 ;GET INDEX INTO WINDOW PAGE
MOVE T4,(T3) ;GET FIRST POSSIBLE CCW
MOVEM T4,CDBCC1(P1) ;SAVE IN CDB
ADDI T3,1 ;INCREMENT POINTER
MOVEI T4,0 ;DONT STORE GARBAGE IF OVERFLOW
TRNE T3,777 ;STILL WITHIN WINDOW BOUND?
MOVE T4,(T3) ;YES - FETCH SECOND POSSIBLE CCW
MOVEM T4,CDBCC1+1(P1) ;SAVE IN CDB
CALL UNMRCA ;FREE WINDOW
PION ;ALLOW INTERRUPTS AGAIN
ERCNI1: MOVSI T2,(DO.BA1) ;READ PRIMARY BLOCK ADDRESS REGISTER
CALL RDREGX
MOVE T4,T1 ;SAVE BAR IN T4
MOVSI T2,(DO.CT1) ;READ PRIMARY TRANSFER CONTROL REGISTER
CALL RDREGX
MOVE T2,T1 ;INTO T2
MOVE T3,T4 ;GET BAR INTO T3
MOVE T1,CDBCNI(P1) ;GET CONI
RET
SUBTTL Channel Utility Routines -- Compute Number of Device Blocks
;BLKCNT - ROUTINE TO COMPUTE NUMBER OF DEVICE BLOCKS NEEDED TO DO I/O
; T1/ END OF TRANSFER LIST,,BEGINNING OF TRANSFER LIST
; P3/ UDB
; P4/ IORB
;RETURNS+1(ALWAYS):
; T1/ NUMBER OF DEVICE BLOCKS NEEDED FOR THIS TRANSFER LIST
BLKCNT: MOVX T2,US.TAP ;TAPE?
TDNE T2,UDBSTS(P3) ; ???
JRST BLKCT1 ;YES
HLRZ T2,T1 ;GET TAIL OF CCW LIST
SUBM T1,T2 ;SUBTRACT TO GET NEGATIVE LENGTH OF LIST
HRLZ T2,T2 ;START BUILDING AOBJN POINTER
HRR T2,T1 ;INSERT HEAD ADDRESS TO FINISH IT
SETZ T3, ;INITIALIZE TOTAL
BLKCNL: MOVE T1,(T2) ;GET NEXT CCW WORD
LOAD T1,CHCNT,T1 ;EXTRACT WORD COUNT
ADDB T1,T3 ;ADD INTO TOTAL
AOBJN T2,BLKCNL ;LOOP OVER ALL CCW WORDS
MOVE T2,UDBSIZ(P3) ;GET POINTER TO DISK SIZE TABLE
IMUL T1,SECPAG(T2) ;MULTIPLY BY NUMBER OF SECTORS IN A PAGE
ADDI T1,PGSIZ-1 ;ROUND UP IF DOING PARTIAL SECTORS
LSH T1,-PGSFT ;DIVIDE BY PAGE SIZE TO GET SECTORS NEEDED
RET ;DONE
BLKCT1: MOVEI T1,1 ;MAGTAPE IS ALWAYS 1
RET
SUBTTL Channel Utility Routines -- Reverse CCW List
;REVCCW - ROUTINE TO REVERSE THE CHANNEL IOWD LISTS FOR REREAD IN OPPOSITE DIRECTION
; T2/ WORDCOUNT OF RECORD
; P4/ IORB
;RETURNS+1(ALWAYS):
;T1/ORIG LH OF CHANGED IOWD,,ITS ADDRESS IF IT GOT CHANGED (CHLST LIT, WDCNT CHANGED)
; AND IOWD LIST SET UP TO READ IN THE OPPOSITE DIRECTION
REVCCW::JUMPE T2,[SETZ T1,
RET] ;WORDCOUNT OF 0 IS HIGHLY ILLEGAL
SAVEQ ;NEED SOME ACS
SETZ Q2, ;Q2 WILL POINT AT CHANGED IOWD
HRRZ T3,IRBXFL(P4) ;GET START OF LIST
REVCC1: SKIPN T1,(T3) ;GET AN IOWD
SOJA T3,REVCC4 ;UNTERMINATED LIST, ENDS AT PREVIOUS IOWD
LOAD T4,CHCNT,T1 ;GET WORDCOUNT OF IOWD
CAMLE T4,T2 ;LAST IOWD?
JRST REVCC2 ;YES, IO LIST IS TOO LONG. FIX IT
SUB T2,T4 ;ACCOUNT FOR THE WORDS IN THIS IOWD
JUMPE T2,REVCC3 ;LIGHT CHLST IF IOWD FINISHES THE RECORD
TLNE T1,(CHLST) ;NO. END OF LIST (RECORD TOO LONG)?
JRST REVCC4 ;YES, WE'RE AT END. REVERSE THEM
AOJA T3,REVCC1 ;NOT AT END. TRY NEXT IOWD
REVCC2: STOR T2,CHCNT,T1 ;FIX IOLIST - SET CORRECT LENGTH
REVCC3: TLO T1,(CHLST) ;INDICATE IT IS THE LAST IOWD
REVCC4: MOVE Q2,(T3) ;SAVE ORIGINAL IOWD (LH)
HRR Q2,T3 ;SAVE ITS ADDRESS
MOVEM T1,(T3) ;SAVE MODIFIED IOWD WHERE THE RH20 WILL SEE IT
HRRZ T2,IRBXFL(P4) ;POINT T2 AT START OF LIST
REVCC5: CAML T2,T3 ;HAVE A PAIR OF IOWDS TO EXCHANGE?
JRST REVCC6 ;NO, AT A SINGLE IOWD (MIDDLE), OR DONE
MOVE Q1,(T3) ;GET LAST IOWD
MOVE T1,(T2) ;GET 1ST IOWD
TLZE Q1,(CHLST) ;LAST IOWD?
TLO T1,(CHLST) ;YES, LIGHT BIT IN CORRESPONDING NEW IOWD
CALL REVIOW ;SET IT FOR READ OPPOSITE
MOVEM T1,(T3) ;AND SAVE AWAY
MOVE T1,Q1 ;GET LAST IOWD
CALL REVIOW ;REVERSE IT
MOVEM T1,(T2) ;AND SAVE
SUBI T3,1 ;POINT AT NEXT TO LAST
AOJA T2,REVCC5 ;POINT AT 2ND, AND REVERSE NEXT PAIR
REVCC6: CAME T2,T3 ;EVEN NO OF IOWDS?
JRST REVCC7 ;YES, DONE
MOVE T1,(T2) ;NO, GET MIDDLE IOWD (OR ONLY ONE)
CALL REVIOW ;REVERSE IT
MOVEM T1,(T2) ;SAVE UPDATED IOWD
REVCC7: MOVE T1,Q2 ;RETURN VALUE IN T1
RET ;AND WE'RE DONE
;REVERSE 1 IOWD
REVIOW: LOAD T4,CHCNT,T1 ;GET COUNT OF IOWD
TLCE T1,(CHREV) ;REVERSE DIRECTION
JRST [SUBI T1,-1(T4) ;WAS REVERSE, SET FOR FORWARD
RET]
ADDI T1,-1(T4) ;WAS FORWARD, POINT AT END
RET
SUBTTL Interrupt Routine
;ENTER FROM PHYSIO W/ C(P1) := CDB CAUSING INTERRUPT.
RH2INT: XCT RH2DTI(P1) ;GET REGISTER RH WAS CONNECTED TO
TLZ T1,007770 ; CLEAR UNNEEDED BITS
MOVEM T1,CDBRST(P1) ;SAVE FOR EXIT SEQUENCE TO RESTORE (DATA0 RH,CDBRST)
XCT RH2CNI(P1) ;GET CONI
MOVEM T1,CDBCNI(P1) ;AND SAVE FOR ERROR LOGGING, ETC.
TRNN T1,CI.RAE ;IS RAE SET?
JRST RH2IN1 ;NO - GO ON
MOVE T2,T1 ;COPY CONI
XCT RH2DTI(P1) ;GET DATAI
HRRZ T3,CDBADR(P1) ;GET CHANNEL ADDR
BUG.(CHK,P2RAE3,PHYH2,HARD,<PHYH2 - Register access error on done or ATN interrupt>,<<T1,DATAI>,<T2,CONI>,<T3,CHAN>>,<
Cause: The routine PHYINT was called to process an interrupt for the RH20, and
a check was made to see if a register access error occured, and it did.
This is almost always due to a hardware malfunction. It can also
happen when a RP06 LAP (Logical Address Plug) is removed or inserted.
Action: Call Field Service if this is seen unless RP06 LAPs are being removed
or inserted.
Data: DATAI - The result of a DATAI done after the error was detected
CONI - The CONI which showed the register access error
CHAN - The channel number
>,,<DB%NND>) ;[7.1210]
CALL CLRRAE ;CLEAR RAE
MOVE T1,CDBCNI(P1) ;RECOVER CONI
RH2IN1: MOVEI Q1,0 ;INITIAL UNIT #
TRNN T1,CI.ATN ;ANY ATTENTIONS?
JRST NOATTN ;NO
MOVSI T2,(DO.AS) ;SET TO READ ATTENTION SUMMARY REGISTER
CALL RDREGX ; READ (ANY UNIT WILL DO)
ANDI T1,377 ;MASK OUT IMPOSSIBLE BITS
TRNN T1,377 ;ANY ATTENTION ON?
JRST NOATTN ;NO - CHECK DATA TRANSFER
ATCHKN: LSHC T1,-1 ;SHIFT 1 BIT OVER
JUMPGE T2,ATCHK2 ;JUMP IF NOT THIS UNIT
PUSH P,T1 ;SAVE REMAINDER
HRRZ T1,Q1 ;GET UNIT #
CALL SETUDB ;SET UP P3 := UDB ADDRESS, T2 := DISPATCH
JUMPE P3,ATNXU ;SPURIOUS INTERRUPT IF NO UNIT THERE
SETZ P4, ;P4=0 IF NO ERRORS
CALL UDSATN(T2) ;INFORM LOWER LEVEL
;SETS LH(Q1) TO -1 IF POS DONE INTERRUPT
JRST ATCHK0 ;NORMAL RETURN
POP P,T1 ;"REALLY-A-TRANSFER-DONE-INTERRUPT" RETURN
JRST XFR3 ; (TM78 SENSE AFTER IO). CLEAN UP XFER
ATCHK0: JUMPN P4,ATNIRB ;JUMP IF IORB DONE OR ERROR
ATCHK1: POP P,T1 ;RESTORE ATTENTION REGISTER
ATCHK2: SKIPE T1 ;DONE IF ZERO
AOJA Q1,ATCHKN ;INCR UNIT # AND TRY NEXT
NOATTN: MOVE T1,CDBCNI(P1) ;GET CONI AT INTERRUPT
SKIPL T4,CDBXFR(P1) ;TRANSFER IN PROGRESS?
JRST XFR ;YES - ANALYZE
TRNE T1,CI.DON ;IS DONE UP NOW?
JRST BADDON ;EVIL EVENT
NOATT1: HLLE P4,Q1 ;NO TRANSFER, SET P4=-1 OR 0
RETSKP ;AND LET PHYSIO DO ITS THING
XFR: TRNN T1,CI.DON ;IS CONTROLLER BUSY?
JRST [ SETZ P4, ;YES, MUST BE FROM ERRPSI (PHYRP4)
RETSKP] ; SO JUST DISMISS THE INTERRUPT
SKIPLE WREQ ;NEED TO CHECK FOR CHANNEL WRITE PARITY ERRORS?
CALL CKCWP ;YES, DO SO
MOVSI T2,(DO.CT1) ;READ RH20 CONTROL REGISTER
CALL RDREGX
LOAD T1,DI1UNS,T1 ;GET UNIT RH20 IS TALKING TO
CAME T1,T4 ;RIGHT UNIT?
JRST WRNGUN ;NO, TRY AGAIN
CALL SETUDB ;YES, SET UP P3, T2
XFR1: CALL UDSINT(T2) ;CALL INTERRUPT SERVICE
JRST XFR2 ;INDICATE ERRORS
JUMPLE P4,XFR3 ;DON'T SET BITS IF NO IORB
MOVX T1,CS.CWP ;GET CHANNEL WRITE PARITY BIT
TDNE T1,CDBSTS(P1) ;CHANNEL WRITE PARITY ERROR DETECTED ON THIS CHANNEL?
JRST XFR4 ;YES, FLAG THEM AS SUCH
XFR3: SETOM T1 ;T1:=-1
EXCH T1,CDBCAD+1(P1) ;GET OLD CONTENTS, CLEAR SECONDARY CCW ADDR WORD
MOVEM T1,CDBCAD(P1) ; AND MOVE IT INTO THE PRIMARY WORD
MOVSI T1,(CS.AC2) ;STACKED COMMANDS?
TDNN T1,CDBSTS(P1) ; ??
JRST [ CALL CLRCHL ;NO - RESET CHANNEL
RETSKP] ;INDICATE NO ERRORS
MOVEI T1,CO.DON ;YES - JUST CLEAR DONE
CALL CHNCNO ; ...
RETSKP
;HERE WHEN THERE WAS A CHANNEL WRITE PARITY ERROR DETECTED BY THE APR THAT
;WAS CAUSED BY THIS CHANNEL. P4/IORB
XFR4: MOVX T1,IS.DVE ; AND DEVICE ERROR BIT FOR IORB
IORM T1,IRBSTS(P4) ;YES, SET DEVICE ERROR BIT
;HERE WHEN THERE HAS BEEN AN ERROR DETECTED AT A LOWER LEVEL
XFR2: SETOM CDBCAD(P1) ;CLEAR PRIMARY CCW ADDRESS WORD
SETOM CDBCAD+1(P1) ; AND SECONDARY
MOVEI T1,CO.DEL ;DELETE STACKED COMMAND
CALL CHNCNO ; ...
MOVEI T1,CO.DON ;EXPLICITLY CLEAR DONE FIRST
CALL CHNCNO ; ...
CALLRET CLRCHL ;AND RESET ERRORS
;HERE IF AN IORB FINISHES DURING ATTENTION PROCESSING OR
;IF THERE WAS A SEEK ERROR
ATNIRB: HRRZS P4 ;CLEAR ERROR FLAG
POP P,(P) ;SCRAP STACK
RETSKP ;RETURN TO PHYSIO, NEVER SET CHAN ERR
;HERE IF WE GOT AN INTERRUPT FROM THE WRONG DRIVE
WRNGUN: MOVE T1,T4 ;DRIVE PHYSIO IS TALKING TO
CALL SETUDB ;SET UP P3
SKIPG P3 ;CHECK TO SEE IF WE GOT A UDB (TAPES)
BUG.(HLT,PH2IUA,PHYH2,HARD,<Wrong and inactive unit interrupted>,,<
Cause: The routine RH2INT was called to handle an interrupt, and it determined
that I/O had finished for a controller but that active controller can't
be found. This bug may also be seen in combination with PH2WUI
BUGHLTs.
Action: Have Field Service verify proper operation of the RH20s and other
MASSBUS device hardware.
>)
PUSH P,T2 ;SAVE DISPATCH ADDRESS
CALL SETIRB ;SET UP P4
MOVE T2,IRBSTS(P4) ;DRIVE STATUS
TLOE T2,(IS.WGU!IS.ERR) ;HAVE WE SEEN THIS ERROR BEFORE?
JRST WRNGU1 ;YES, BADNESS
MOVEM T2,IRBSTS(P4) ;NO, SAVE ERROR BITS
POP P,T2 ;RETRIEVE DISPATCH ADDRESS
JRST XFR1 ;AND RETRY THE OPERATION
WRNGU1: MOVEM T2,IRBSTS(P4) ;SAVE ERROR BITS
LDB T2,IRYFCN ;IF THIS IS A WRITE WE'D BETTER HALT
CAIE T2,IRFWRT ;BEFORE WE WIPE OUT SOME DISK
CAIN T2,IRFWTF
BUG.(HLT,PH2WUI,PHYH2,HARD,<Wrong unit interrupted>,,<
Cause: The routine RH2INT was called to handle an interrupt, and it determined
that I/O had finished for a unit. The operation was a write operation.
The CONI said that a particular unit completed the I/O, but that was
not the unit to which the I/O was begun. This BUGHLT occurs on the
second such error for a particular IORB. This bug may also be seen in
combination with PH2IUA BUGHLTs.
Action: Have Field Service verify proper operation of the RH20s and other
MASSBUS device hardware.
>)
JRST PA1 ;RETURN AN ERROR
;HERE ON AN INTERRUPT FROM A NONEXISTANT UNIT.
ATNXU: PUSH P,Q1 ;SAVE REGISTER
HRRZ Q2,Q1 ;GET UNIT NUMBER
CALL RH2UNS ;SELECT UNIT
HRRZ Q2,Q1 ;GET UNIT NUMBER
ADD Q2,P1 ;POINT TO CDB+UNIT
MOVEM P3,CDBUDB(Q2) ;STORE NEW ENTRY
POP P,Q1 ;RESTORE REGISTER
MOVEI T2,1 ;CLEAR ATTENTION DIRECTLY
LSH T2,(Q1) ;POSITION BIT
HRLI T2,(DO.AS) ;IN ATTENTION SUMMARY REGISTER
CALL WTREGX ;SPECIAL REGISTER, NEEDS NO UNIT
JRST ATCHK1 ;AND CONTINUE LOOKING
;HERE WHEN DONE IS UP AND THE CHANNEL IS NOT OCCUPIED.
BADDON: HRRZ T2,CDBADR(P1) ;GET CHANNEL #
BUG.(INF,PH2DNA,PHYH2,HARD,<PHYH2 - Done interrupt and channel not active>,<<T2,CHAN>>,<
Cause: The routine RH2INT was called to handle an interrupt on the RH20 and
the CONI said done was up, but no I/O transfer was in progress. If an
OVRDTA had previously occured, and the device finally responds, this
BUGINF will happen. This usually indicates a hardware failure.
Action: Field Service should check the devices on the channel listed in the
additional data; any channel/controller/unit listed in OVRDTA BUGCHKs
should be suspected.
Data: CHAN - The channel number
>,,<DB%NND>) ;[7.1210]
LDB T2,CSYPIA ;GET PI ASSIGNMENT
TRO T2,CO.RAE!CO.XFR!CO.ATE!CO.DON ;CLEAR RAE,XFRERR,DON.
XCT RH2CNO(P1) ;SEND TO CHANNEL
SKIPLE WREQ ;NEED TO CHECK FOR CHANNEL WRITE PARITY ERRORS?
CALL CKCWP ;YES, DO SO
SETOM CDBCAD(P1) ;CLEAR PRIMARY AND SECONDARY CCW
SETOM CDBCAD+1(P1) ; ADDRESS WORDS
JRST NOATT1
;ROUTINE TO CALL MEMSCN FOR EACH TRANSFER WORD IN THE CHANNEL COMMAND LIST
;IF A CHANNEL WRITE PARITY ERROR WAS DETECTED BY THE APR WHILE THIS
;TRANSFER WAS GOING. FIRST CHECK TO SEE IF THE FUNCTION CODE FROM THE PTCR
;WAS FOR A WRITE TO MEMORY (READ FROM DEVICE) AND THEN FOLLOW THE CHANNEL
;COMMAND LIST CALLING MEMSCN FOR EACH TRANSFER WORD.
;CALL:
; P1/CDB
;RETURN +1 ALWAYS WITH CS.CWP SET IN CDB+CDBSTS AND CDB+CDBPAR
; INCREMENTED IF A MEMORY ERROR WAS DETECTED BY MEMSCN
;PRESERVES THE T AND Q AC'S
CKCWP: SAVET ;SAVE THE T AC'S
MOVX T2,DO.CT1 ;REGISTER SELECT FOR PTCR
CALL RDREGX ;READ IT
LOAD T1,DI1FNC,T1 ;GET THE FUNCTION CODE
CAIGE T1,70 ;WAS THE FUNCTION A MEMORY WRITE (DEVICE READ)?
RET ;NO, JUST RETURN
SAVEQ ;SAVE THE Q AC'S
SKIPG Q1,CDBCAD(P1) ;GET THE ADDRESS OF THE CHANNEL COMMAND LIST
RET ;CONFUSION?
CKCWP1: MOVE Q2,(Q1) ;GET THE NEXT WORD IN THE LIST
TXNN Q2,CHXFR ;WAS THE OPCODE A TRANSFER?
RET ;NO, DONE WITH THE LIST
LOAD T1,CHADR,Q2 ;GET THE ADDRESS FROM THE CCW
JUMPE T1,CKCWP3 ;NO ADDRESSES TO SCAN IF CHANNEL SKIP
LOAD T2,CHCNT,Q2 ;GET THE WORD COUNT TO SCAN
TXNE Q2,CHREV ;WAS IT A REVERSE TRANSFER?
SUBI T1,-1(T2) ;YES, SET THE ADDRESS TO THE BEGINNING
CKCWP2: CALL MEMSCN ;SCAN THE WORDS DESCRIBED BY THIS POINTER
JRST [ MOVX T1,CS.CWP ;GET CHANNEL WRITE PARITY ERROR BIT
IORM T1,CDBSTS(P1) ;SET IT IN THE CDB
AOS CDBPAR(P1) ;INCREMENT THE PARITY ERROR COUNT IN THE CDB
JRST CKCWP3] ;CONTINUE
CKCWP3: TXNN Q2,CHLST ;TRANSFER AND HALT?
AOJA Q1,CKCWP1 ;NO, INCREMENT THE ADDRESS AND TRY NEXT ONE
RET ;YES, DONE WITH THE LIST
SUBTTL ECC Channel Logic
;THE FOLLOWING ROUTINES, AS IN SEVERAL OTHER PLACES, ASSUME THE
;CCW LIST IS EXACTLY ONE WORD LONG.
;HERE TO RETURN THE PHYSICAL ADDRESS OF THE START OF THE LAST BLOCK
;TRANSFERRED. CALL:
; P1/ CDB
; P3/ UDB
;RETURNS: +1: ALWAYS
; T1/ PHYSICAL ADDRESS OF START OF LAST SECTOR TRANSFERRED
ECCADR::MOVEI T1,PGSIZ ;GET SIZE OF A PAGE
HRRZ T2,UDBSIZ(P3) ;AND POINTER TO DISK SIZE TABLE
IDIV T1,SECPAG(T2) ;COMPUTE SIZE OF A SECTOR
MOVEI T2,-1(T1) ;CREATE MASK
HRRZ T1,CDBICP(P1) ;GET STATUS AREA
MOVE T1,2(T1) ;GET CS2, THE UPDATED CCW
LOAD T1,CHADR,T1 ;GET ADDRESS PART
SUBI T1,1 ;BACK UP INTO LAST SECTOR TRANSFERRED
TRZ T1,(T2) ;MASK TO START OF SECTOR
RET ;DONE
;HERE TO UPDATE THE CCW LIST TO TRANSFER ANY DATA AFTER THE SECTOR
;WHICH WAS ECC CORRECTED.
;
; CALL ECCUCL
;RETURNS+1:
; NO MORE DATA TO TRANSFER
;RETURNS+2:
; UPDATED CCW AT CDBCCL(P1)
;T1/ NUMBER OF WORDS TRANSFERED INCLUDING SECTOR ECC CORRECTED
ECCUCL::HRRZ T4,CDBICP(P1) ;GET STATUS AREA
MOVE T1,2(T4) ;GET UPDATED CCW
LOAD T3,CHCNT,T1 ;GET WORD COUNT
JUMPE T3,R ;IF 0, ALL DONE.
TLO T1,(CHXFR!CHLST) ;FORCE LAST TRANSFER
MOVEM T1,CDBCCL(P1) ;STORE IN CDB
SETZM CDBCCL+1(P1) ;CLEAR TAIL
CALL PHYCNT ;GET IORB COUNT
SUB T1,T3 ;LESS WORDS TRANSFERRED
RETSKP
SUBTTL End of PHYH2
TNXEND
END