ST BusSpeeder

Q&A that deal with Black Cat Hardware
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ST BusSpeeder

Postby Administrator » Thu Dec 28, 2017 11:15 am

20 years ago I upgraded a 520ST from 8MHz to 16MHz bus speed i.e. CPU and RAM were clocked with 16MHz, a 100% increase in speed. That way I was able to use a RSVE RS232 speeder with 38400bps and use the ST as an answering/fax machine. The old PCB was single sided home-brew type i.e. ugly :D
This year I reworked the design for SMD part use and it's ready for testing:
ST_16MHz_BusSpeeder1.jpg
As the ST's clock tree needs to be revised some tracks on the ST's mainboard need to be cut! You need a 16MHz CPU and you probably need to replace the RAM as this project needs 70ns DRAM. So if you haven't done it yet it's a good idea to upgrade to 4MB with a PS/2 SIMM for example.
This project is definitely NOT for hardware rookies. The original design was created by Stefan Nitschke.
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Re: ST BusSpeeder

Postby Administrator » Fri Dec 29, 2017 10:15 am

First benchmarks available 8-)
Benchmark01.jpg
Benchmark02.jpg
Benchmark03.jpg
Benchmark04.jpg
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crashman
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Re: ST BusSpeeder

Postby crashman » Fri Feb 02, 2018 7:59 pm

Wow!

I really envy you.

Good work!

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