Name Mnemonic Characteristics Code DIAGNOSE M DM 83 INSERT PSW KEY IPK S PK M R 8208 INSERT STORAGE KEY ISK RR M A1 SP R 09 LoAD CONTROL LCTL RS M A SP 87
LOADPSW LPSW S L M A SP $ 82
LOAD REAL ADDRESS LRA RX C
TR M A2 R
81
PURGETIL8 PTL8 S TR M $ 820D READ DIHECT RDD SI DC M A $ ST 85
RESETRI:FERENCE BIT RR8 S C
TR M A1 8213
SETCLOCK SCK S C
M ASP 8204 SET CLOCK COMPARATOR SCKC S CK M A SP 8206 SET CPU TIMER SPT S CK M A SP 8208 SET PREFIX SPX S MP M A SP $ 8210 SET PSW IKEY FROM ADDRESS SPKA S PK M 820A SET STOnAGE KEY SSK RR M A1 SP 08 SET SYSTEM MASK SSM S M A SO 80 SIGNAL PROCESSOR SIGP RS C
MP M $ R
AESTORE CLOCK COMPARATOR STCKC S CK M A SP ST 8207 STORE CONTROL STCTL RS M A SP ST 86 STORE CPU ADDRESS STAP S MP M A SP ST 8212 STORE CPU ID STIDP S M A SP ST 8202 STORE CPU TIMER STPT S CK M A SP ST 8209 STORE PHEFIX STPX S MP M A SP ST 8211 STORE TI-IEN AND SYSTEM MASK STNSM SI TR M A ST AC
STORE THENOR SYSTEM MASK STOSM SI TR M A ST AD WRITE DIRECT WRD SI DC M A $ 84 Explanation: A exceptions PK PSW-key-handling feature
A1 exceptions only R PER general-register-alteration event
A2 and translation-specification exceptions only RR RR instruction format
C
Condition code is setRS RS instruction format
CKCPU-ti mer and clock-comparator feature RX RX instruction format
DC Direct-control featureS S instruction format
DM Depending on the model,DIAGNOSE may generate SI SI instruction format
various program exceptions and may change theSO Special-operation exception
condition code.SP Specification exception
L NewIcondition code loaded ST PER storage-alteration event
M Privil,eged-operation exception TR Translation feature
MP Multiprocessing feature $ Causes serialization
System-Control-InstructionSummary follow the rule that programming errors are distin-Insert PSW Key
guished from equipment errors. Improper use ofDIAGNOSE may result in false indi- IPK [S] cations or may cause actual machine malfunctions to
be ignored. It may also alter other aspects of system8208 operation, including instruction execution and chan- 0 16 31
nel operation, to an extent that the operation does
not comply with that specified in this manual. As a The four-bit protection key of the currentPSW is
result of the improper use ofDIAGNOSE, the sys-inserted into bit positions 24-27 of general register
tern may be left in such a condition that the power-2. Bits0-23 of general register 2 remain unchanged,
on reset or initial-microprogram-Ioading function and bits 28-31 are set to zeros. Bits 16-31 of the
must be performed. instruction are ignored.104 System/370 Principles of Operation
LOAD
LOAD REAL ADDRESS LRA RX C
TR M A2 R
81
PURGE
RESET
TR M A1 8213
SET
M A
MP M $ R
AE
STORE THEN
A1
A2
C
Condition code is set
CK
DC Direct-control feature
DM Depending on the model,
various program exceptions and may change the
condition code.
L New
M Privil,eged-operation exception TR Translation feature
MP Multiprocessing feature $ Causes serialization
System-Control-Instruction
guished from equipment errors. Improper use of
be ignored. It may also alter other aspects of system
nel operation, to an extent that the operation does
not comply with that specified in this manual. As a The four-bit protection key of the current
result of the improper use of
tern may be left in such a condition that the power-2. Bits
on reset or initial-microprogram-Ioading function and bits 28-31 are set to zeros. Bits 16-31 of the
must be performed. instruction are ignored.