Casio Cassiopeia PA-2400 - Manual (Page 7)

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2. I/O Bootup Library
2.1 Overview
The I/O bootup library monitors the connection status of the dedicated I/O Box and notifies the user
of the status.
2.2 Function
This library supports only one function, iobox_chk(). The iobox_chk() function monitors and
detects, for a specified period, whether I/O Box is mounted, and returns the result (mounting
detected, time-out error, or error). Each time this function is used, it is necessary to also execute
"Permit interrupt, Wait for interrupt and time-out, and Prohibit interrupt". The following diagram
shows the range covered by this library.
Fig. 2.1
(3) I/O Box ON Signal
PA-2400
(2) Mounting
I/O PORT: 0
IOBOX1.DLL
User Application
(1) iobox_chk ( TIME_OUT_SEC ) ;
(4) Timeout
(5) Return
Detection, Timeout
Error
I/O Box