Cpu Status Indicators - IBM System/370 145 Operating Procedures Manual

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CPU STATUS INDICATORS
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NOTE
I ndicators not described in the chart are for
service personnel and are described in mainte-
nance documentation.
AOR INV AOR TOO SNG CF
EXE COMP CLOCK STOR TRAP TRAP M2 X-LATE CLOCK LOG ECC PWR IMPL
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INDICATOR
CONDITION
I ndlcotes CPU stopped state reached os u result of:
1. Pressing the STOP key.
EXE CPLT
2. The RATE switch In the INSTRUCTION STEP position.
3. A match being detected while In the address match mode
of operation.
I ndicates that the address (real or logical) being used to access
main storage matches the address set into switches CDEFGH dur-
ADR COMP MATCH
ing an address match operation. The action taken by the CPU
as a result of the match condition is controlled by the setting of
the ADDRESS COMPARE CONTROL switch.
CLOCK STOP
I ndicates that the CPU is in an immediate stop condition (CPU
clock not running).
TOD CLOCK I NVLD
Indicates that the time-of-day clock is invalid. The indicator is
turned off by successfully executing a set clock instruction.
I ndicates that a log is present in the log area of main storage.
LOG PRES
When the CHECK CONTROL switch is in the STOP AFTER LOG
position and the LOG PRES indicator is on, run SEREP.
SNG ECC CHK
I ndicates that one of the data or check bits from storage has been
corrected.
CF PWR ON Indicates that power is applied to the console file.
I ndicates that an operation which resulted in a system reset has
IMPL REOD been initiated. The indicator is turned off when the system reset
routine is executed. An IMPL is required if the indicator remains on.
Console I ndicators, Switches, and Keys 9