18 interrupt permission flag (2fh), 19 crom bank selection (30h) – NEC PD17062 User Manual
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µ
PD17062
9.18 INTERRUPT PERMISSION FLAG (2FH)
This flag is used to enable interrupt for each interrupt cause. When the flag is set to 1, interrupt is enabled.
When the flag is set to 0, interrupt is disabled.
9.19 CROM BANK SELECTION (30H)
b
3
b
2
b
1
b
0
IPSIO0
IPVSYN
IPNC
2FH
0
1
IPBTM0
0
1
0
1
0
1
Interrupt from the INT
NC
pin disabled
Interrupt from the INT
NC
pin enabled
Interrupt from the clock timer disabled
Interrupt from the clock timer enabled
Interrupt from the V
SYNC
pin disabled
Interrupt from the V
SYNC
pin enabled
Interrupt from the serial interface disabled
Interrupt from the serial interface enabled
b
3
b
2
b
1
b
0
0
0
CROMBNK
30H
0
1
0
CROM address setting
CROM address 0800H-0BFFH
CROM address 0C00H-0F7FH