Table of Contents

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Table of Contents

Combination Board for MB020

Introduction

Features

Design Files

Software

Combination Board for MB020

Introduction

FRR512K is modified to serve as the combination board for MB020. The combination board implements the serial port, bootstrap ROM, and compact flash drive functions.

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Features

Repurposed FRR512K board

64KB bootstrap EPROM for MB020

Compact flash drive

Serial port with setting of 115200, N81 with hardware handshake

Design to run CP/M68K on MB020

Design Files

Schematic

Engineering Changes

www.retrobrewcomputers.org_lib_plugins_ckgedit_fckeditor_userfiles_image_builderpages_plasmo_frr512k_rev0_frr512k_combo_mb020.jpg

CPLD design files

Software

Bootstrap EPROM for MB020

CP/M68K for combo. The three files included need to be loaded; type “go 15000” afterward.