HardLabs

GPRModule

crempp·ucpu·cpu/GPR/GPRModule.kicad_pcb

GPRModule PCB layout, top view — open source board by crempp

About the GPRModule PCB

GPRModule is an open source PCB design by crempp, published on GitHub. It is a 2-layer board measuring 100 × 80 mm, with 51 components from 10 distinct parts.

Other key parts include the 74HCT574, 74HCT245 and 74HCT125. By type, the board carries 20 diodes, 13 capacitors, 11 ICs, 6 resistors and 1 connector.

From the project

16bit CPU made from TTL Logic Chips

This is a 16bit pipelined CPU designed on a breadboard and produced in modular component boards.

My objective in this project is to learn electronics, CPU design and build a fully functional CPU that can be updated, added to and further developed easily.

The CPU is designed around four general purpose 16 bit registers four 16 bit address registers ALU supporting addition, subtraction, shift and bitwise operations piplined instructions * banked memory with a base of 64k, expandable to about 1.5 megabytes (max TBD)

GPRModule, from the project README
From the project README

Main components on the GPRModule

74HCT57474HCT24574HCT125

GPRModule bill of materials (BOM)

51 components, 10 distinct parts.

QtyPartRefs
2
74HCT574
U1, U2
8
74HCT245
U3, U4, U5, U6, U7, U8, U9, U10
1
74HCT125
U11
1
Interconnect
J1
16
LED_RED
D0, D1, D2, D3, D4, D5, D6, D7 +8
4
LED_AMBER
D16, D17, D18, D19
11
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +3
2
10uF
C12, C13
4
220R
R16, R17, R18, R19
2
220R
RN1, RN2

GPRModule design files

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

GPRModule: common questions

How big is the GPRModule PCB?

The GPRModule measures 100 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the GPRModule?

51 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the GPRModule design files?

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

Can I use the GPRModule design in my own project?

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

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