Table of Contents
MB020, A 68020-based Motherboard
MB020 is a 4“x4” 68020-based motherboard with 3 RC2014 expansion slots. It allows RC2014 users to reuse their existing hardware to explore the 68020 processor.
- 4/16 meg 72-pin SIMM DRAM
- 66.67Hz (14.7456MHz clock) level 1 autovector interrupt
- Three RC2014 expansion slots
MB020 consists of a 4“x4” motherboard populated with 68020, EPM7128S, SIMM72 socket and 3 RC2014 expansion slots. The purpose is to reuse the existing RC2014 boards to explore MC68020. To that end, the boot ROM, I/O, mass storage will be the existing RC2014 boards. A 68020 monitor will be developed for the boot ROM so it can load files, display & modify memory and registers, and run applications. The I/O can be RC2014 SIO2 or 68B50 boards and a RC2014 CF board can be added to run CP/M68K.
Gerber photoplots, 4-layer pc board
Bill of Materials
Engineering change. An enginnering change is required to connect CPLD's reset to 68020 reset.
CPLD design files