Category: DIY

FSIO-Gen-I/O board

FSIO General I/O board has been designed to allow interfacing inputs and outputs to the simulator hardware.

There are 4 input 74LS165 ICs providing total total of 32 inputs available on the board. Input devices (buttons, switches, encoders etc.) can be connected to the board with the use of IDC-10 connectors. Each single IDC-10 socket is connected to 8 inputs on a single chip providing: IC1_OUT – inputs 0 to 7, IC2_OUT – inputs 8-15, IC3_OUT – inputs 16-23 and IC4_OUT – inputs 24-31.
Although socket names shows _OUT in the name on the silkscreen layer, these are INPUTS and no OUTPUTS here. Descriptions will be corrected to _IN in a future release.

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CPU board prototyping

The first CPU board prototype is working.

The copper clad with traces has been etched at home, at a time when children were at school.

After etching and cleansing with water the holes were drilled on a CNC machine. You can see the CNC in action here:

A little bit of time spent on soldering components, inserting the CPU and board is ready for testing.

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