System Lock Code - Casio PCR-365A Service Manual

7-2. System lock code

The following error code appears on display and receipt when the machine is lock up.
Execute the Flag MAC or MAC operation to clear these errors.
Error code:
Error sample:
Error code Error Name
1 Sequential trap
2 Memory write error
3 Trap error
6 Timer error
7 Stack over
0 Other error
Display: X - - - - - - - - -
Receipt: X ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
X: Lock code
3 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
The machine try to write to accumulator when the CPU is
hung up.
Error happens when the CPU write the data to memory.
Abnormal address
Interrupt timer error
Abnormal address or stack pointer has an error
CPU executes wrong jump vector before detect 1, 3 and
6 error code.
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Meaning