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DELAY

DELAY. 2 個指令週期 ( 改變 PC 值 ) RET A,x RET RETI CALL JMP. 1 個指令週期 ( 條件不成立 , 直接執行下一個指令 ) SDZ SDZA SIZ SIZA SNZ SZ 2 個指令週期 ( 條件成立 , 跳過下一個指令 ). DELAY PROC MOV A,03 ;1 x DEL1 ;C

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DELAY

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  1. DELAY

  2. 2個指令週期 (改變PC值) • RET A,x • RET • RETI • CALL • JMP

  3. 1個指令週期(條件不成立,直接執行下一個指令)1個指令週期(條件不成立,直接執行下一個指令) • SDZ • SDZA • SIZ • SIZA • SNZ • SZ 2個指令週期(條件成立,跳過下一個指令)

  4. DELAY PROC MOV A,03 ;1 x DEL1 ;C MOV DEL2,A ;1 x DEL1 ;C DEL_2: A,110 ;1 x 3 x DEL1 ; B MOV DEL3,A ;1 x 3 x DEL1 ; B DEL_3: SDZ DEL3 ;(109x1+2)x 3 x DEL1 ; A JMP DEL_3 ;109x2 x 3 x DEL1 ; A SDZ DEL2 ; B JMP DEL_2 ; B SDZ DEL1 ( DEL1-1)+2 ;C JMP DELAY ( DEL1-1)x2 ;C RET ; DELAY ENDP END

  5. (109x1+2)x3xDEL1=333xDEL1 • 109x2x3xDEL1=654xDEL1 • 3xDEL1+3xDEL1=6xDEL1 • 4xDEL1+4xDEL1=8xDEL1 • 1xDEL1+1xDEL1=2xDEL1 • (DEL1-1)+2 • (DEL1-1)x2 • 2 • Total 1006DEL1+1

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