DMSX Homebrew Computer (MSX-BASIC Comp.) - Part 2 - Motherboard/Bus Board
by FernandoS24 in Circuits > Microcontrollers
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DMSX Homebrew Computer (MSX-BASIC Comp.) - Part 2 - Motherboard/Bus Board
This is the second part of the modular DMSX Homebrew computer.
You can find the first part here:
https://www.instructables.com/DMSX-Homebrew-Computer-Part-1-ESP32-CPUGPU-Board/
In this second part we are going to build the motherboard. However don't think for a moment this is going to be just an ordinary PC Motherboard full of precious and expensive components. No sir ! This motherboard is much more simple !
The advantage is to use a RE521 Stripboard 100x160 (Full size) as it is a bus board in itself.
This easy MB will support all the daughterboards we are going to build for this project (and add some space left for computer upgrades).
Supplies
You will only need a RE521 Stripboard or equivalent and 7 female pin headers with 23 positions.
7x Female pin header with 23 positions each (2,54mm)
1x RE521 or RE524 from Roth or equivalent Stripboard (100x160mm).
The Board
The motherboard is a 100x160mm Stripboard (RE521) from ROTH Electronis with seven 23 pin female pin strips.
Leave 4 spaces on one side of the motherboard and solder the first header.
Leave 7 column spaces between each header.
Solder the Rest (6 Female Headers)
Solder the rest of the female headers as show in the pictures.
Have Fun Building the Previous Daughter Board (VGA/GPU) and the Next Ones.
Watch how nice the daughter board sit on the motherboard. The male header pins ar soldered on the 5th line as this makes the daughterboards sit against the header pin and on motherboard's floor (base).
As an option you can identify the pins, this could be handy later (note: the last picture is from an old version of the MB as there are no spaces left on margin).