OpenTendo PCB

An Open-Source Hardware (OSHW) recreation of the original 1985 Front-Loading NES motherboard. This listing is for release V1.2 of ONES-CPU-01.

This PCB is 1.6mm thick with an ENIG finish.

Parts

Please be sure to see the release notes here. The Bill of Materials (BOM) can be found here.

Outside of the Bill of Materials, a few parts can’t be purchased new. The below parts can be purchased from places like Aliexpress, eBay, or UTSource.

• U5 PPU RP2C02 (harvested from original Famicom/NES or UA6528 (clone)
• U6 CPU RP2A03 (harvested from original Famicom/NES or UA6527 (clone)
• U10 CIC – The CIC can be harvested from the original front-loading NES or a Nullcic board can be used. (COMING SOON)
• TC1 30pf Capacitor
• RA2 6.8K 4 Resistor Network with common bus )
• DA1, DA3 Diode Array – DAN601
• DA2,DA4 Diode Array – UPA64H
• Q1 – Transistor 2SA937
• Q2, Q3 – Transistor 2SC2021
• P6 – 5 pin Connector (harvested from original front-loading NES)