Introducing the Instruction Set Part 1

This tutorial focuses primarily on introducing the CP1610's instruction set. The instructions divide up into multiple categories that we will explore briefly below. You can visit the various instruction pages for details on specific instructions.

Primary Instructions

The CP1610 has 7 primary instructions. The primary instructions have the most flexibility in terms of where they draw their inputs from. The 7 primary instructions are:

MVI	"MoVe In": Read a value into a register
MVO	"MoVe Out": Write a value from a register to memory
ADD	Add two values together
SUB	Subtract two values
CMP	Compare two values by subtracting them
AND	Bitwise logical AND
XOR	Bitwise logical XOR

Each instruction takes two operands. The first operand is a source operand. The second is both source and destination, except in the case of CMP, which doesn't write a result. (CMP does, however, set flags.)

The primary instructions are available in 4 forms, each with a different addressing mode. The mnemonics for each form differs slightly from the others:

Register Mode	Direct Mode	Indirect Mode	Immediate Mode
MOVR	MVI	MVI@	MVII
--	MVO	MVO@	MVOI
ADDR	ADD	ADD@	ADDI
SUBR	SUB	SUB@	SUBI
CMPR	CMP	CMP@	CMPI
ANDR	AND	AND@	ANDI
XORR	XOR	XOR@	XORI