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3-6-12 Number of Power Interruptions
Word A014 contains the number of times that power has been interrupted since
the PC was first turned on. The number is in BCD, and can be reset by writing
#0000 to word A014.
3-6-13 Service Disable Bits
Words A015 and A017 contain control bits that disable I/O servicing to certain
Units and periodic refreshing.Turn these bits ON and OFF in the program. The
service disable bits are automatically turned OFF when power is turned on or PC
operation is stopped.
Bits A01500 through A01515 can be turned ON to stop service to CPU Bus
Units numbered #0 through #15, respectively. Turn the appropriate bit OFF
again to resume service to the CPU Bus Unit.
Bit A01703 can be turned ON to stop Host Link System servicing. Turn OFF
again to resume service to the Host Link System.
Bit A01704 can be turned ON to stop service to Peripheral Devices. Turn
OFF again to resume service to Peripheral Devices.
Bit A01705 can be turned ON to stop periodic and SYSMAC BUS refreshing.
Turn OFF again to resume periodic and SYSMAC BUS refreshing.
3-6-14 Message Flags
When the MESSAGE instruction (MSG(195)) is executed, the bit in A099 corre-
sponding to the message number is turned ON. Bits 00 through 07 correspond
to message numbers 0 through 7, respectively.
3-6-15 Error Log Area
Words A100 through A199 contain up to 20 records that show the nature, time,
and date of errors that have occurred in the PC. The Error Log Area will store
system-generated or FAL(006)/FALS(007)-generated error codes. Refer to
Section 8 Error Processing
for details on error codes.
The Error Log Area can be moved to the DM or EM Areas and its size can be
increased to store up to 2,047 records with the PC Setup.
With the default PC Setup, error records occupy five words each stored be-
tween words A100 and A199. The last record that was stored can be ob-
tained via the content of word A300 (Error Record Pointer). The record num-
ber, Auxiliary Area words, and pointer value for each of the twenty records
are as follows:
Record Addresses Pointer value*
None N.A. 0000
1 A100 to A104 0001
2 A105 to A109 0002
3 A110 to A114 0003
4 A115 to A119 0004
5 A120 to A124 0005
6 A125 to A129 0006
7 A130 to A134 0007
8 A135 to A139 0008
9 A140 to A144 0009
CPU Service Disable Bits
Host Link Service Disable
Bit
Peripheral Service Disable
Bit
I/O Refresh Disable Bit
Area Structure
Auxiliary Area Section 3-6
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