Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:plasmo:protor5:proto65:proto65r01
 Snapshot date: 2025-11-17
 Generator    : wayback-archiver

Proto65 Rev0.1, a 6502 SBC based on Protor5

Introduction

Features

Design Information

Software

This is the link to Proto65 Rev0, an earlier version without the disk-on-module.

This is the link to Proto65 Rev0.2, a later version with I2C bus added

Protor5 has a prototype area big enough for a processor, RAM and IDE44 interface. In this evolving project a 6502 CPU along with 128Kx8 RAM and an IDE interface are prototyped on a protor5 board.

Based on protor5

EPM7192SQC160 CPLD

Reset supervisor

CPLD programming header

Reset supervisor

2.1mm X 5.5mm power jack

Oscillator socket for full and 1/2 size can

Serial port interface

Prototype area

6502 CPU testbed

128K 25-ns RAM based on CY7C109-25

IDE44 interface for CF disk

40-pin expansion connector

Schematic

CPLD design

Bootstrap ROM inside the CPLD

TinyLoad, a 256-byte Intel Hex loader.

CFboot, an utility program to write bootstrap program into the Master Boot Record of a CF or DOM disk. It also copy RAM image from 0xC000-0xEDFF into track 0, sector 0xE0-0xF7 of a disk

EhBASIC, Lee Davison's EhBASIC ported to Proto65