Epson S1C17001 Technical Manual page 100

Interrupt vector
The port interrupt vector numbers and vector addresses are as shown below.
S1C17001 TECHNICAL MANUAL
Table 10.7.2: Port interrupt vectors
Port Vector number
P0 4 (0x04)
P1 5 (0x05)
EPSON
10 INPUT/OUTPUT PORT (P)
Vector address
0x8010
0x8014
91