JA32050 Datasheet, PDF (19/19 Pages) List of Unclassifed Manufacturers – 8-Bit MCU,ADC,LCD Controller

sta COUNT
; COUNT = 256
Loop1:
nop
nop
dec COUNT
bne Loop1
nop
; now count = 0
nop
dec DELAY
bne Loop1
rts
;-------------------------------------
;Interrupt service routine
;--------------------------------------
INTHANDLE:
sei
pha
php
; ;disable INT
;; ;push A register
;; ;push status register
lda #$02
bit INTF
;; timer0 INT?
bne TIMER0_INT ; timer0
lda #$04
bit INTF
;; timer1 INT?
bne TIMER1_INT ; timer1
TIMER0_INT:
lda #$fd
and INTF
sta INTF
jmp INT_RTN
TIMER1_INT:
lda #$fb
and INTF
sta INTF
inc timer1_h
jmp INT_RTN
; ;"1111,1101", clear timer0 flag
;"1111,1011", clear timer1 flag
; ; add carry
INT_RTN:
plp
;pop status register
pla
;pop A register
cli
; ;enable INT
rti
;--------------------------------------
org $fffc
dw START
;FFFC - FFFD : store program start address
dw INTHANDLE ; ;FFFE - FFFF : store interrupt subroutine address
ends
end
!
JA32050
Preliminary
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FAXΚ886-3-5770756
19-19
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