Mercurial > hg > Applications > Tokio
view Examples/6502/multi.s65 @ 0:cfb7c6b24319
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author | kono |
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date | Thu, 30 Aug 2007 14:57:44 +0900 |
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;; 16 bit multply last equ $80 d1 equ last d2 equ last+2 result equ last+4 count equ last+8 work equ last+9 org $0 start cld lda #$92 sta d1 lda #$34 sta d1+1 lda #$83 sta d2 lda #$21 sta d2+1 jsr multi16 brk multi16 lda #0 sta result sta result+1 sta result+2 sta result+3 ldx #d1 jsr multil inx ;; fall into multi8 multi8 lda #0 multil sta work lda d2 sta work+1 lda d2+1 sta work+2 jmp entry adding clc lda work+2 adc 6,x sta 6,x lda work+1 adc 5,x sta 5,x lda work adc 4,x sta 4,x loop asl work+2 rol work+1 rol work entry lsr 0,x bcs adding bne loop rts end