High Level Assembler - SVC-codes overview

The table below lists all documented SVC-codes for IBM's MVS & OS/390 & z/OS operating systems. The entries for the other tables have not yet been filled in.

Please note that VM uses no SVCs, since these are reserved for use by the guest operating systems. To request VM system functions Diagnose instructions are used instead.
SVC assignments for CMS and GCS are listed in separate columns.

SVC-code Assignments.

	MVS OS/390 z/OS	CMS (DOS OFF)	GCS	CMS (DOS ON)
X'00'	EXCP XDAP	EXCP XDAP		EXCP
X'01'	PRTOV WAIT WAITR	WAIT		FETCH
X'02'	POST	POST		FETCH
X'03'	EXIT	EXIT (no macro)		FORCE DEQUEUE (not supported)
X'04'	GETMAIN R,LOC=BELOW	GETMAIN		LOAD
X'05'	FREEMAIN R,LOC=BELOW	FREEMAIN		MVCOM
X'06'	LINK LINKX	LINK		CANCEL
X'07'	XCTL XCTLX	XCTL		WAIT
X'08'	LOAD	LOAD		CONTROL
X'09'	DELETE	DELETE		LBRET
X'0A'	GETMAIN R,LOC=BELOW FREEMAIN LOC=BELOW	GETMAIN FREEMAIN		SET TIMER
X'0B'	TIME	TIME		TRANS.RETURN
X'0C'	SYNCH SYNCHX			JOB CONTROL 'AND'
X'0D'	ABEND	ABEND		JC FLAGS
X'0E'	SPIE	SPIE		EOJ
X'0F'	ERREXCP			SYSIO
X'10'	PURGE			PC STXIT
X'11'	RESTORE	RESTORE (does nothing)		PC EXIT
X'12'	BLDL ,,D FIND ,,D	BLDL FIND		IT STXIT
X'13'	OPEN	OPEN		IT EXIT
X'14'	CLOSE	CLOSE		OC STXIT
X'15'	STOW	STOW		OC EXIT
X'16'	OPEN TYPE=J	OPEN TYPE=J		SEIZE
X'17'	CLOSE TYPE=T	CLOSE TYPE=T		LOAD HEADER
X'18'	DEVTYPE	DEVTYPE		SETIME
X'19'	TRKBAL	TRKBAL (does nothing)		HALT I/O
X'1A'	CATALOG INDEX LOCATE			Valdiate Address Limits
X'1B'	OBTAIN			TP HALT I/O
X'1C'				MR EXIT
X'1D'	SCRATCH			WAITM
X'1E'	RENAME			QWAIT
X'1F'	FEOV	FEOV		QPOST
X'20'	ALLOC REALLOC
X'21'	IOHALT			COMRG
X'22'	MGCR MGCRE QEDIT			GETIME
X'23'	WTO WTOR	WTO WTOR		HOLD
X'24'	WTL			FREE
X'25'	SEGLD SEGWT			AB STXIT
X'26'				ATTACH
X'27'	LABEL			DETACH
X'28'	EXTRACT	EXTRACT (does nothing)		POST
X'29'	IDENTIFY	IDENTIFY		DEQ
X'2A'	ATTACH ATTACHX	ATTACH		ENQ
X'2B'	CIRB
X'2C'	CHAP	CHAP (does nothing)		UNIT CHECKS
X'2D'	OVLYBRCH			EMULATOR INTERF.
X'2E'	STIMERM CANCEL STIMERM TEST TTIMER	STIMERM TTIMER		OLTEP
X'2F'	STIMER STIMERM SET	STIMER STIMERM		WAITF
X'30'	DEQ	DEQ (does nothing)		CRT TRANS
X'31'				CHANNEL PROG.
X'32'				LIOCS DIAG.
X'33'	SDUMP SDUMPX SNAP SNAPX	SNAP		RETURN HEADER
X'34'	RESTART			TTIMER
X'35'	RELEX			VTAM EXIT
X'36'	DISABLE			FREEREAL
X'37'	EOV			GETREAL
X'38'	ENQ RESERVE	ENQ (does nothing)		POWER
X'39'	FREEDBUF	FREEDBUF		POWER
X'3A'	RELBUF REQBUF			SUPVR.INTERF.
X'3B'	OLTEP			EOJ INTERF.
X'3C'	STAE ESTAE STAI ESTAI	STAE ESTAE		GETADR
X'3D'	IKJEGS6A (TSO)			GETVIS
X'3E'	DETACH	DETACH (does nothing)		FREEVIS
X'3F'	CHKPT	CHKPT (does nothing)		USE
X'40'	RDJFCB	RDJFCB		RELEASE
X'41'				CDLOAD
X'42'	BTAMTEST			RUNMODE
X'43'				PFIX
X'44'	SYSNADAF SYNADRLS	SYNADAF SYNADRLS		PFREE
X'45'	BSP	BSP		REALAD
X'46'	GSERV			VIRTAD
X'47'	ASGNBFR BUFINQ RLSEBFR			SETPFA
X'48'	No macro;			GETCBUF FREECBUF
X'49'	SPAR			SETAPP
X'4A'	DAR			PAGE FIX
X'4B'	DQUEUE			SETCVAL
X'4C'	IFBSTAT			SYSREC
X'4D'				TRANSCCW
X'4E'	LSPACE			CHAP
X'4F'	STATUS			SYNCH
X'50'				SETT
X'51'	SETDEV SETPRT			TESTT
X'52'				LINKAGE
X'53'	SMFWTM BRANCH=NO SMFEWTM BRANCH=NO			ALLOCATE
X'54'	GRAPHICS			SET LIMIT
X'55'	DDRSWAP			RELPAG
X'56'	ATLAS			FCEPGOUT
X'57'	DOM			PAGEIN
X'58'				TPIN
X'59'				TPOUT
X'5A'				PUTACCT
X'5B'	VOLSTAT			POWER
X'5C'	TCBEXCP TCPEXCP			XECBTAB
X'5D'	TGET TPG TPUT	TGET TPUT		XPOST
X'5E'	GTDEVSIZ GTSIZE RTAUTSRM STATTN STAUTOCP STAUTOLN STAUTSRM STBREAK STCC STCLEAR STCOM STFSMODE STLINENO STSIZE STTIMEOU STTMPPMD STTRAN TCABEND TCLEARQ TCSEND TSEND TSTGTTRM TSTTPMD	TCLEARQ		XWAIT
X'5F'	SYSEVENT			AB EXIT
X'60'	STAX	STAX		TT EXIT
X'61'	IKJEGS9G			TT STXIT
X'62'	PROTECT			EXTRACT
X'63'	DYNALLOC			GETVCE
X'64'	IKJEFFIB
X'65'	QTIP			MODVCE
X'66'	AQCTL
X'67'	XLATE			SYSFIL
X'68'	TOPCTL			EXTENT
X'69'	IMGLIB			SUBSID
X'6A'				LINKAGE
X'6B'	MODESET			TASK INTERF.
X'6C'				DATA SECURE
X'6D'	ESPIE IFAUSAGE MFDATA (RMF) MFSTART (RMF) MSGDISP OUTADD OUTDEL	ESPIE		PAGESTAT
X'6E'				LOCK UNLOCK
X'6F'	no macro
X'70'	PGRLSE	PGRLSE (does nothing)
X'71'	PGANY PGFIX PGFREE PGLOAD PGOUT	PGLOAD (does nothing) PGOUT (does nothing)
X'72'	EXCPVR
X'73'
X'74'	CALLDISP CHNGNTRY IECTATNR IECTCHGA IECTRDTI RESETPL
X'75'	DEBCHK
X'76'
X'77'	TESTAUTH
X'78'	GETMAIN LOC=ABOVE FREEMAIN LOC=ABOVE
X'79'	no macro (VSAM)
X'7A'	EVENTS (type 2) extended LINK extended LOAD extended XCTL Service Processor Call STIMERE VALIDATE	LINK XCTL LOAD
X'7B'	PURGEDQ
X'7C'	TPIO
X'7D'	EVENTS (type 1)
X'7E'	MSS
X'7F'
X'80'
X'81'
X'82'	RACHECK
X'83'	RACINIT
X'84'	RACLIST
X'85'	RACDEF
X'86'
X'87'
X'88'
X'89'	ESR
X'8A'	PGSER	PGSER (does nothing)
X'8B'	CVAF CVAFDIR CVAFDSM CVAFSEQ CVAFVOL CVAFVRF
X'8C'
X'8D'
X'8E'
X'8F'	CIPHER EMK (type 4) GENKEY RETKEY
X'90'	no macro
X'91'
X'92'	BPESVC
X'93'
X'94'
X'95'
X'96'
X'97'
X'98'
X'99'
X'9A'
X'9B'
X'9C'
X'9D'
X'9E'
X'9F'
X'A0'
X'A1'
X'A2'
X'A3'
X'A4'
X'A5'
X'A6'
X'A7'
X'A8'
X'A9'
X'AA'
X'AB'
X'AC'
X'AD'
X'AE'
X'AF'
X'B0'
X'B1'
X'B2'
X'B3'
X'B4'
X'B5'
X'B6'
X'B7'
X'B8'
X'B9'
X'BA'
X'BB'
X'BC'
X'BD'
X'BE'
X'BF'
X'C0'
X'C1'
X'C2'
X'C3'
X'C4'
X'C5'
X'C6'
X'C7'
X'C8'
X'C9'		obsolete	obsolete	obsolete
X'CA'		no macro	no macro	no macro
X'CB'		obsolete	obsolete	obsolete
X'CC'		CMSCALL	CMSCALL	CMSCALL
X'CD'
X'CE'
X'CF'

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To the SVC-codes table.

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