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LD BCDE,(ps+d)     Load     Rabbit 4000/5000 Instruction

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

Clocks	8-Bit Access	16-Bit Unaligned	16-Bit Aligned
Rabbit 4000	15	n/a	n/a
Rabbit 5000	16	15	14

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

Description

Loads the 32-bit register BCDE with the data whose 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 ps 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 or 24 bits (depending on the memory that is used) being significant.

The address is computed as the sum of ps and the 8-bit signed displacement d.