LD pd,(ps+d)     Load     Rabbit 4000 Instruction

Opcode	Instruction	Clocks	Operation
--	LD pd,(ps+d)	15 (2,2,2,1,2,2,2,2)	pd0=(ps+d); pd1=(ps+d+1) pd2=(ps+d+2); pd3=(ps+d+3)
6D 08 d	LD PW,(PW+d)	15 (2,2,2,1,2,2,2,2)	PW0=(ps+d) PW1=(ps+d+1) PW2=(ps+d+2) PW3=(ps+d+3)
6D 18 d	LD PW,(PX+d)
6D 28 d	LD PW,(PY+d)
6D 38 d	LD PW,(PZ+d)
6D 48 d	LD PX,(PW+d)	15 (2,2,2,1,2,2,2,2)	PX0=(ps+d) PX1=(ps+d+1) PX2=(ps+d+2) PX3=(ps+d+3)
6D 58 d	LD PX,(PX+d)
6D 68 d	LD PX,(PY+d)
6D 78 d	LD PX,(PZ+d)
6D 88 d	LD PY,(PW+d)	15 (2,2,2,1,2,2,2,2)	PY0=(ps+d) PY1=(ps+d+1) PY2=(ps+d+2) PY3=(ps+d+3)
6D 98 d	LD PY,(PX+d)
6D A8 d	LD PY,(PY+d)
6D B8 d	LD PY,(PZ+d)
6D C8 d	LD PZ,(PW+d)	15 (2,2,2,1,2,2,2,2)	PZ0=(ps+d) PZ1=(ps+d+1) PZ2=(ps+d+2) PZ3=(ps+d+3)
6D D8 d	LD PZ,(PX+d)
6D E8 d	LD PZ,(PY+d)
6D F8 d	LD PZ,(PZ+d)

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

Description

Loads pd (any of the 32-bit registers PW, PX, PY or PZ) 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 bits or 24 bits being significant (depending on the memory available).

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