Rabbit 2000 Reference Manual

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Rabbit 2000 Reference Manual Manual pdf 55 page image

Instruction Reference Manual 51DescriptionLoads the low-order byte of the word register dd (any of the word registers BC, DE, HL or SP) with the dataat memory address mn. Then loads the high-order byte of the word register dd with data at memory addressmn plus 1.DescriptionLoads the alternate register pair dd' (any of the registers BC', DE', or HL') with the data in the register pair BCor the register pair DE. These instructions are implemented for the Rabbit and are not available for the Z180.LD dd,(mn)Opcode Instruction Clocks Operation——ED 4B n mED 5B n m2A n mED 7B n mLD dd,(mn)LD BC,(mn)LD DE,(mn)LD HL,(mn)LD SP,(mn)13 (2,2,2,2,1,2,2)13 (2,2,2,2,1,2,2)13 (2,2,2,2,1,2,2)13 (2,2,2,2,1,2,2)13 (2,2,2,2,1,2,2)dd(low) = (mn);dd(high) = (mn + 1)C = (mn); B = (mn + 1)E = (mn); D = (mn + 1)L = (mn); H = (mn + 1)SP(low)=(mn); SP(high)=(mn+1)Flags ALTD I/OS Z L/V C F R SP S D- - - - • •LD dd',BCLD dd',DEOpcode Instruction Clocks Operation——ED 49ED 59ED 69LD dd',BCLD BC',BCLD DE',BCLD HL',BC4 (2,2)4 (2,2)4 (2,2)4 (2,2)dd' = BCBC' = BCDE' = BCHL' = BC——ED 41ED 51ED 61LD dd',DELD BC',DELD DE',DELD HL',DE4 (2,2)4 (2,2)4 (2,2)4 (2,2)dd' = DEBC' = DEDE' = DEHL' = DEFlags ALTD I/OS Z L/V C F R SP S D- - - -