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6502 Computer

DomAtTheShack·6502-Breadboard-ROM·Schmatics/6502-Main-Board/6502 Computer.kicad_pcb

6502 Computer PCB layout, top view — open source AVR/Arduino board by DomAtTheShack
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About the 6502 Computer PCB

6502 Computer is an open source AVR/Arduino PCB design by DomAtTheShack, published on GitHub. It is a 2-layer board measuring 216.6 × 144 mm, with 74 components from 50 distinct parts.

Its main chip is the ATMEGA328P-PU, from the AVR/Arduino family. Other key parts include the WD65C02, 28C256, WC1602A, 74HC00 and WD65C22. By type, the board carries 25 capacitors, 14 ICs, 13 connectors, 12 resistors, 4 crystals and 1 speaker.

It belongs with the dev boards & breakouts and retro computing designs in this gallery.

From the project

I've removed all the connections between the two Atmega328p chips and the 74HC166 chip since the design is copyrighted. But all the connections can be found on Grant Searle's website (http://searle.x10host.com/MonitorKeyboard/index.html) along with instructions on how to connect

I've removed all the connections between the two Atmega328p chips and the 74HC166 chip since the design is copyrighted. But all the connections can be found on Grant Searle's website (http://searle.x10host.com/MonitorKeyboard/index.html) along with instructions on how to connect them to your specific display.

Main components on the 6502 Computer

WD65C0228C256WC1602A74HC00WD65C22CY62256-70PC655174HC166MOS6581/6582/8580SIDMAX232LM38674HC74

6502 Computer bill of materials (BOM)

74 components, 50 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
WD65C02
U1
1
28C256
U2
1
WC1602A
U3
1
74HC00
U4
1
WD65C22
U5
1
CY62256-70PC
U6
1
6551
U7
1
74HC166
U8
1
MOS6581/6582/8580SID
U9
1
MAX232
U10
1
LM386
U11
2
74HC00
U12, U13
1
74HC74
U14
1
ACO-1.8432MHZ
ACO-1.8432MHz
X1
1
1.023MHz
X2
1
11.0582 MHz
Y1
1
16 MHz
Y2
1
DE9_Pins
J1
1
CONN_02X20_ODD_EVEN
Conn_02x20_Odd_Even
J2
1
CONN_01X04_MALE
Conn_01x04_Male
J3
Show 30 more
QtyPartRefs
3
CONN_02X03_ODD_EVEN
Conn_02x03_Odd_Even
J4, J7, J12
1
CONN_02X08_ODD_EVEN
Conn_02x08_Odd_Even
J5
1
CONN_01X06_MALE
Conn_01x03
J6
1
Barrel_Jack
J8
1
CONN_01X11_MALE
Conn_01x11_Male
J9
1
RCJ-017
J11
1
RCJ-017
J17
1
MINI-DIN_6PINS
Mini-DIN_6pins
P1
1
Speaker
LS1
2
R_POT_TRIM_US
RV1, RV2
1
RESET
SW1
2
ATMEGA328P-PU
ATmega328P-PU
UA1, UB1
7
0.1UF
0.1uF
C1, C3, C4, C10, C11, C12, C14
1
0.1
C5
4
22PF
22pF
C6, C7, C8, C9
1
10uf
C13
1
10UF
0.1uF
C15
4
1uf
C16, C17, C18, C19
1
0.05uF
C20
1
20uF
C21
1
250uF
C22
1
10uF
C23
2
0.1uF
C24, C25
1
1uF
C28
1
1K
R1
3
10K
10k
R2, R3, R6
1
1k
R4
1
470 Ohms
R5
5
10k
R7, R8, R9, R11, R12
1
10 Ohm
R10

6502 Computer design files

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

6502 Computer: common questions

What microcontroller does the 6502 Computer use?

The 6502 Computer is built around the ATMEGA328P-PU, from the AVR/Arduino family.

How big is the 6502 Computer PCB?

The 6502 Computer measures 216.6 × 144 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 6502 Computer?

74 components, from 50 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 6502 Computer design files?

From the DomAtTheShack/6502-Breadboard-ROM 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 6502 Computer design in my own project?

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

Can I test firmware for the 6502 Computer without the hardware?

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

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