Proto65 Rev0.2, a 6502 SBC based on Protor5

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.

• 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

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

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.