D4-440 and D4-430 CPU Product Overview

This document details the features and specifications of the D4-440 and D4-430 CPUs from the DL405 product family, including their instruction sets, communication ports, power supply options, and memory cartridge compatibility. It compares the capabilities of the two CPUs, highlighting the D4-440's advanced features and the D4-430's economical design with built-in EEPROM memory.