Software Card Lock - Casio IT-2000W Technical Reference Manual

Software Card Lock

Sets or acquires the Lock/Unlock status of the software-type card lock switch.
This machine has a card lock mechanism that is on the card case to prevent accidental removal
of the card. This mechanism has a software driver that detects the released state of this lock and
executes the appropriate file closing procedure. However, some types of cards, depending on the
card shape, can not be fastened by the lock switch. If this is the case, even if a card is present it
will not be detected. This function is provided to handle this type of card.
To use a card for which the card lock mechanism can not be used, call this function in advance to
set the software lock switch to ON. Now a card can be detected when it is inserted or removed.
SYNTAX
int SYS_SetCardLock(int OnOff);
INPUT
OnOff = Cardlock ON/OFF
OUTPUT
0 Normal termination
Logic Circuit of Software Card-Lock
PCMCIA
GA
0 Unlock
Other than 0 Lock
Fig. 8.10
178
Card
Software Lock
Switch