HardLabs

Vr65816

vruumllc·vr65816_PCB

Vr65816 PCB layout, top view — open source RP2040/RP2350 board by vruumllc

About the Vr65816 PCB

Vr65816 is an open source RP2040/RP2350 PCB design by vruumllc, published on GitHub. It is a 2-layer board measuring 150 × 125 mm, with 71 components from 33 distinct parts.

Its main chip is the SC1631, from the RP2040/RP2350 family. Other key parts include the SC1633, W65C816S6PG-14, W65C22S6TPG-14, AS6C4008-55PCN and CD74AC245E. By type, the board carries 30 resistors, 17 capacitors, 13 ICs, 5 connectors, 3 jumpers and 2 diodes.

It belongs with the retro computing designs in this gallery.

From the project

65816 Single Board Computer compatible with Rumbledethump's RP6502 Picocomputer

WDC 65C816 Single Board Retro-Computer compatible with Rumbledethump's Picocomputer Architecture

This project is based on Rumbledethump's Picocomputer 6502 design, so he gets top billing.

That said, any flaws are my fault, 'cause his board works GREAT!

Report any problems to me using the 'Issues' menu item above.

If you aren't an experienced programmer, or just want to build an inexpensive but extremely capable retro-computer to re-live the exciting early days of the personal computer, then I'd strongly suggest starting with the Rumbledethump's Picocomputer 6502 (RP6502 for short). Order…

Vr65816, from the project README
From the project README

Main components on the Vr65816

SC1633SC1631W65C816S6PG-14W65C22S6TPG-14AS6C4008-55PCNCD74AC245ECD74AC573ECD74AC00ECD74AC04ECD74HC4002ECD74AC20E

Vr65816 bill of materials (BOM)

71 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SC1633
Pi Pico2W
Raspberry Pi
U1
1
SC1631
Pi Pico2
Raspberry Pi
U2
1
W65C816S6PG-14
W65C816S
WDC
U3
1
W65C22S6TPG-14
W65C22S
WDC
U4
2
AS6C4008-55PCN
AS6C4008
Alliance
U5, U6
1
CD74AC245E
74AC245
TI
U7
1
CD74AC573E
74AC573
TI
U8
1
CD74AC00E
74AC00
TI
U9
1
CD74AC04E
74AC04
TI
U10
1
CD74HC4002E
74HC4002
TI
U11
2
CD74AC20E
74AC20
TI
U12, U13
1
10129381-914001BLF
PIX
Amp
J1
1
10129381-914001BLF
PWR&AMP
Amp
J2
1
10129381-924001BLF
GPIO
Amp
J3
1
10129381-914001BLF
AVOUT
Amp
J4
1
AUDIO
J6
1
POWER
JP1
1
SHIELD
JP2
1
10129378-903001BLF
User
Amp
JP3
1
TS11-674-43-BK-160-RA-D
REBOOT
CUI
SW1
Show 13 more
QtyPartRefs
1
HLMP-3401
8/16
Broadcom / Avago
D1
1
HLMP-3507
User
Broadcom / Avago
D2
15
A104M15X7RF5TAA
0.1μF
Vishay
C1, C2, C3, C4, C5, C6, C7, C8 +7
2
FG22X5R1A476MNT06
47μF
TDK
C14, C15
4
MFR-25FBF52-8K06
8.06k
YAGEO
R1, R17, R22, R27
7
MFR-25FBF52-2K
2k
YAGEO
R2, R3, R4, R6, R19, R24, R29
3
MFR-25FBF52-100R
100
YAGEO
R5, R10, R11
3
MFR-25FBF52-220R
220
YAGEO
R8, R9, R14
2
MFR-25FBF52-1K8
1.8k
YAGEO
R12, R13
2
MFR-25FBF52-47R
47
YAGEO
R15, R16
3
MFR-25FBF52-4K02
4.02k
YAGEO
R18, R23, R28
3
MFR-25FBF52-1K
1k
YAGEO
R20, R25, R30
3
MFR-25FBF52-499R
499
YAGEO
R21, R26, R31

Vr65816 design files

The KiCad project lives in the vruumllc/vr65816_PCB repository on GitHub; these links point at the commit this page was built from.

Vr65816: common questions

What microcontroller does the Vr65816 use?

The Vr65816 is built around the SC1631, from the RP2040/RP2350 family.

How big is the Vr65816 PCB?

The Vr65816 measures 150 × 125 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Vr65816?

71 components, from 33 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Vr65816 design files?

From the vruumllc/vr65816_PCB repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Vr65816 design in my own project?

The repository has no license, so all rights stay with vruumllc. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Vr65816 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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