538
Memory Areas
Appendix C
AR 15
00 to 07
Memory Cassette Program Code
Code (2-digit number) indicates the size of the program stored in the Memory Cassette.
00:
There is no program, or no Memory Cassette is installed.
04:
The program is less than 3.2 Kwords long.
08:
The program is less than 7.2 Kwords long.
12:
The program is less than 11.2 Kwords long.
16:
The program is less than 15.2 Kwords long.
08 to15
CPU Unit Program Code
Code (2-digit number) indicates the size of the program stored in the CPU Unit.
04:
The program is less than 3.2 Kwords long.
08:
The program is less than 7.2 Kwords long.
12:
The program is less than 11.2 Kwords long.
16:
The program is less than 15.2 Kwords long.
AR 16
00 to 10
Not used.
11
PC Setup Initialized Flag
Turns ON when a checksum error occurs in the PC Setup area and all settings are initialized back
to the default settings.
12
Program Invalid Flag
Turns ON when a checksum error occurs in the UM (user program) area, or when an improper
instruction is executed.
13
Instructions Table Initialized Flag
Turns ON when a checksum error occurs in the instructions table and all settings are initialized
back to the default settings.
14
Memory Cassette Added Flag
Turns ON if the Memory Cassette is installed while the power is on.
15
Memory Cassette Transfer Error Flag
Turns ON if a transfer cannot be successfully executed when DIP switch pin No. 2 is set to ON
(i.e., set to automatically transfer the contents of the Memory Cassette at power-up.)
AR 17
00 to 07
“Minutes” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
08 to 15
“Hour” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
AR 18
00 to 07
“Seconds” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
08 to 15
“Minutes” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
AR 19
00 to 07
“Hour” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
08 to 15
“Date” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
AR 20
00 to 07
“Month” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
08 to 15
“Year” portion of the present time, in 2 digits BCD
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
AR 21
00 to 07
“Day of week” portion of the present time, in 2 digits BCD [00: Sunday to 06: Saturday]
(Valid only when a Memory Cassette with a clock is installed. See page 170 for details.)
08 to 12
Not used.
13
30-second Adjustment Bit
Valid only when a Memory Cassette with a clock is installed. See page 170 for details.
14
Clock Stop Bit
Valid only when a Memory Cassette with a clock is installed. See page 170 for details.
15
Clock Set Bit
Valid only when a Memory Cassette with a clock is installed. See page 170 for details.
AR 22
00 to 07
Input Words
Number of words (2 digits BCD) allocated for input bits (Only a recognized value will be stored. A
value of 00 will be stored if an I/O UNIT OVER error has occurred.)
08 to 15
Output Words
Number of words (2 digits BCD) allocated for output bits (Only a recognized value will be stored. A
value of 00 will be stored if an I/O UNIT OVER error has occurred.)
Word
Bit(s)
Function
