Reverse Engineered - the East London Robotics SP80 upgrade
Yes! It's possible!
By the end of this video you'll understand this mod in every single detail, so make a cup of tea and settle in for another detailed reverse engineering journey.
Thanks Steve for the photos.
Thanks Tynemouth software for the blogpost which helped me a lot with this.
Thanks Colin for the loan!
Dave's Tynemouth Software Blog - http://blog.tynemouthsoftware.co.uk/2020/03/a-zx-spectrum-with-80k-of-ram.html
Ken Shirriff's Blog - https://www.righto.com/2020/11/reverse-engineering-classic-mk4116-16.html
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