Table of Contents
/* Imported from Wayback Machine
Original URL : https://retrobrewcomputers.org/doku.php?id=builderpages:plasmo:protor5:proto65:proto65r02 Snapshot date: 2025-11-17 Generator : wayback-archiver
*/
Table of Contents
Proto65 Rev0.2, a 6502 SBC based on Protor5
Introduction
This is the link to Proto65 rev0.1, an older version without I2C bus.
This is the link to Proto65 rev0.3, a standalone 6502 system with its own VGA and PS2 keyboard interface.
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.
Features
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
I2C Bus
40-pin expansion connector
Design Information
Software
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
I2C Programs
Conway's Game of Life. This program is initialized with Gosper Glide Gun. It drives the 128×64 OLED display over I2C bus.
A short video of the program running on YouTube.
Display ASCII table on 128×64 OLED display
Driving WS2812B addressable RGB LED.
