LD (pd+HL),BCDE     Load     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
--	LD (pd+HL),BCDE	18 (2,2,2,3,3,3,3)	(pd+HL) = E; (pd+HL+1) = D (pd+HL+2) = C; (pd+HL+3) = B
DD 0D	LD (PW+HL),BCDE	18 (2,2,2,3,3,3,3)	(PW+HL) = E; (PW+HL+1) = D (PW+HL+2) = C; (PW+HL+3) = B
DD 1D	LD (PX+HL),BCDE	18 (2,2,2,3,3,3,3)	(PX+HL) = E; (PX+HL+1) = D (PX+HL+2) = C; (PX+HL+3) = B
DD 2D	LD (PY+HL),BCDE	18 (2,2,2,3,3,3,3)	(PY+HL) = E; (PY+HL+1) = D (PY+HL+2) = C; (PY+HL+3) = B
DD 3D	LD (PZ+HL),BCDE	18 (2,2,2,3,3,3,3)	(PZ+HL) = E; (PZ+HL+1) = D (PZ+HL+2) = C; (PZ+HL+3) = B

Flags				ALTD			IOI/IOE
S	Z	L/V	C	F	R	SP	S	D
-	-	-	-

Description

Loads the memory location whose address is computed as the sum of pd and HL with BCDE. HL is considered sign extended to 24 bits.

The address is treated either as a logical address that will be passed through the MMU for translation into a physical address or as a physical address that does not need MMU translation.

If pd is 0xFFFFxxxx, i.e., the upper 16 bits are all ones, it represents a logical address. This is called a "long logical" address. Otherwise, it is a physical address with the low 20 bits or 24 bits being significant (depending on the memory available).