HardLabs

Emuprom

agkaminski·FellaPC·expansion/emulator/emuprom.kicad_pcb

Emuprom PCB layout, top view — open source AVR/Arduino board by agkaminski
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About the Emuprom PCB

Emuprom is an open source AVR/Arduino PCB design by agkaminski, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 61.5 × 87.6 mm, with 33 components from 14 distinct parts.

Its main chip is the ATMEGA8-16P, from the AVR/Arduino family. Other key parts include the CY62256-70PC, 74HC244, 74HC32, 74HC373 and CH340N. By type, the board carries 14 capacitors, 10 ICs, 5 resistors, 3 connectors and 1 crystal.

It belongs with the retro computing and keyboards designs in this gallery.

From the project

DIY 6502 all-in-keyboard personal computer

All-in-keyboard 6502 based PC with built-in BASIC interpreter.

- BASIC interpreter, - 6502/65C02/W65C02S CPU @1.8432 MHz, - 32 KiB of ROM, 24 KiB of static RAM, - 640x480@60Hz VGA adapter with character generator (80x60 black and white text mode only), - 6522 VIA for onboard control, I2C memory and user port, - 2 UARTs (USB-C and RS-232), - 68 or 63 button mechanical keyboard, - edge connector expansion port, - powered via USB-C port.

Emuprom, from the project README
From the project README

Main components on the Emuprom

CY62256-70PC74HC24474HC32ATMEGA8-16P74HC373CH340N

Emuprom bill of materials (BOM)

33 components, 14 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CY62256-70PC
U1
4
74HC244
U2, U3, U4, U10
1
74HC32
U5
1
ATMEGA8-16P
ATmega8-16P
U6
2
74HC373
U7, U9
1
CH340N
U8
1
Crystal
Y1
1
CONN_02X03_ODD_EVEN
Conn_02x03_Odd_Even
J2
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J3
1
~
J5
12
100N
100n
C1, C2, C3, C4, C5, C6, C8, C9 +4
2
22P
22p
C15, C16
3
10K
R1, R4, R5
2
1K5
R2, R3

Emuprom design files

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

Emuprom: common questions

What microcontroller does the Emuprom use?

The Emuprom is built around the ATMEGA8-16P, from the AVR/Arduino family.

How big is the Emuprom PCB?

The Emuprom measures 61.5 × 87.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Emuprom?

33 components, from 14 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 Emuprom design files?

From the agkaminski/FellaPC 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 Emuprom design in my own project?

Yes, under the terms of its CC0-1.0 license, which agkaminski chose for the repository.

Can I test firmware for the Emuprom 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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