int0_r.dt

台湾义隆（EM78P222N）,DATASHEET.

;Defined register(BANK0) 
ISR       == 0XF
;Defined register(BANK1) 
IOC5      == 0X5
IOC6      == 0X6
IOC7      == 0X7
IOC8      == 0X8
COMCON    == 0XA
IMR       == 0XF
;         
          ORG      0X0
          NOP
          JMP      RESET              ;Power on reset
          ;
          ORG      0X8
          NOP
          JMP      INT0_R             ;interrupt vector
          ;
INT0_R:
          BANK     0
          BC       ISR, 2             ;Clear INT0IF
          RETI
          ;                 
          ORG      0X50
RESET:
          NOP
          CALL     INIT_222_DEVICE    ;Initial CHIP    
          NOP
          ENI                         ; Enable interrupt
MAIN:
          NOP
          JMP      $
          ;
INIT_222_DEVICE:
          BANK     1
          MOV      A, @0
          MOV      IOC5, A            ; set PORT5 as output
          MOV      IOC6, A            ; set PORT6 as output        
          MOV      IOC8, A            ; set PORT8 as output
          MOV      A, @0X80             
          MOV      IOC7, A            ; Set P7.7 as input      
          BS       COMCON, 6          ;SET P77 AS INT0            
          MOV      A, @4
          MOV      IMR, A             ;Enable EXIE interrupt
          MOV      A, @0X40           ;
          CONTW
          BANK     0
          CLR      ISR                ;Clear interrupt flag
          RET
          ;
          END