Can you get 80K out of your 48K ZX Spectrum with just one extra chip??

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/2... Ken Shirriff's Blog - https://www.righto.com/2020/11/revers... Wondering how you can support the channel? Amazon links to stuff I use! - https://linktr.ee/happylittlediodes Join us on Patreon -   / happylittlediodes   Join us on Discord -   / discord   Try the "Thanks" button underneath this video Like! Comment! Subscribe! Share!