DEY — Decrement Index Y by One — M50734SP Resource

M50734SP Resource Site

Home

Processor

Overview & Architecture Memory Map Registers & Flags On-Chip Peripherals Interrupts

Designers Board

Board Overview Memory Interface I/O Connectors Monitor Program Component Database

Instructions

Full Instruction Index Arithmetic Branch Bit Operations Data Transfer Logic Stack System

Examples Downloads

Home › Instructions › DEY

Instructions

← All Instructions

DEY

Decrement Index Y by One

Arithmetic

DEY instruction reference scan

Scanned from original Mitsubishi M50734 Software Manual. Click to enlarge.

Click anywhere or press Esc to close

M50734SP Resource Site

A community reference for the Mitsubishi M50734SP microprocessor and the RCS Microsystems Designers Board. Preserving and documenting vintage single-chip microcomputer technology for engineers and enthusiasts.

⚡ Mitsubishi 740-Series CMOS Microcomputer Family

Processor

Architecture Memory Map Registers Peripherals Instruction Set

Resources

Designers Board Component Database Code Examples Downloads

M50734SP Resource Site — Community Documentation Project Mitsubishi M50734SP · 740-Series CMOS · 2026