Specifications

S1C62N82 TECHNICAL HARDWARE EPSON I-107
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Melody Generator)
EIMEL
Note
IMEL
Note
Melody Interrupt Mask Register (0E7H D0)
By operating this register, melody interrupt can be masked.
When 1 is written: Interrupt is valid
When 0 is written: Interrupt is invalid
Reading: Valid
Be sure to operate this register in the "DI (interrupt not allowed)"
state. Otherwise, it may result in misoperation.
Melody Interrupt Factor Flag (0ECH D0)
The moment the melody playing (i.e., playing of the address
the end-of-melody data in the melody ROM of which is "1")
ends, a flag is set on this register. Due to this, the end of a
melody playing can be known by reading out this register.
This register is also reset by the hardware after the readout.
When 1 is read: Interrupt generation; 0 after readout
When 0 is read: Interrupt is not generated
Writing: Invalid
Reading of interrupt factor flags is available at EI, but be careful in
the following cases.
If the interrupt mask register value corresponding to the interrupt
factor flags to be read is set to 1, an interrupt request will be
generated by the interrupt factor flags set timing, or an interrupt
request will not be generated.