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6502

lolakkalol·6502-computer-project·6502-schematic/6502-schematic.kicad_pcb

6502 PCB layout, top view — open source RP2040/RP2350 board by lolakkalol

About the 6502 PCB

6502 is an open source RP2040/RP2350 PCB design by lolakkalol, published on GitHub. It is a 2-layer board measuring 648.5 × 231.5 mm, with 57 components from 29 distinct parts.

Its main chip is the Raspberry PI Pico v1, from the RP2040/RP2350 family. Other key parts include the W65C02S, W65C22, AT28C256, AS6C62256 and SC16C752BIB48. By type, the board carries 29 resistors, 14 ICs, 9 connectors, 2 crystals, 1 diode and 1 capacitor.

It belongs with the retro computing designs in this gallery.

From the project

This project started thanks to Ben Eater's video series on his 6502-based computer, which is the basis for my project and learning experience. The project has a very simple goal of me learning low-level embedded system development on hardware and software. To achieve this learnin

This project started thanks to Ben Eater's video series on his 6502-based computer, which is the basis for my project and learning experience. The project has a very simple goal of me learning low-level embedded system development on hardware and software. To achieve this learning goal, a few project goals/milestones have been set up to steer the project in a satisfactory direction. The computer should also not be a carbon copy of Ben Eater's computer to promote self-learning and delving into documentation and learning by doing. I believe you remember things better when you fail at something…

Main components on the 6502

W65C02SW65C22AT28C256AS6C62256SC16C752BIB48CD74HC165E74HC14AT28C64B-15PU74AHCT1G3274HCT00SN74LVC4245ARaspberry PI Pico v1

6502 bill of materials (BOM)

57 components, 29 distinct parts.

QtyPartRefs
1
W65C02S
U1
1
W65C22
U2
1
AT28C256
U3
1
AS6C62256
U4
1
SC16C752BIB48
U5
1
~
U6
1
CD74HC165E
U7
1
74HC14
U8
1
AT28C64B-15PU
U10
1
74AHCT1G32
U11
1
74HCT00
U13
2
SN74LVC4245A
U15, U16
1
Raspberry PI Pico v1
U17
2
ecs-2100x
Y1, Y2
2
Conn_01x05
J1, J3
1
DE15_Plug_HighDensity_MountingHoles
J2
3
Conn_01x08
J4, J6, J9
1
Conn_01x16
J5
2
Conn_01x02
J7, J8
1
Push_Button
B1
Show 9 more
QtyPartRefs
1
D
D1
1
C
C1
14
220
R1, R2, R4, R5, R6, R7, R9, R10 +6
1
R
R3
1
660
R8
3
500
R17, R22, R25
4
1k
R18, R21, R24, R28
4
2k
R19, R20, R23, R29
2
0
R26, R27

6502 design files

The KiCad project lives in the lolakkalol/6502-computer-project repository on GitHub; these links point at the commit this page was built from.

6502: common questions

What microcontroller does the 6502 use?

The 6502 is built around the Raspberry PI Pico v1, from the RP2040/RP2350 family.

How big is the 6502 PCB?

The 6502 measures 648.5 × 231.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 6502?

57 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the 6502 design files?

From the lolakkalol/6502-computer-project repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 6502 design in my own project?

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

Can I test firmware for the 6502 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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