A short video covering the recent installation of a SAM2195 EK board into my Atari 520STFM. Update 21/02/2016: I believe this has been replaced by the SAM2695 now. Profusion also do the evaluation board (SAM2695-EK) as well. SAM2195 EK http://www.profusionplc.com/pro/gex/p... SAM2195 IC http://www.profusionplc.com/pro/gex/p... Cheap WaveBlaster board using the SAM2195 http://www.serdashop.com/waveblaster Exxos Website http://www.exxoshost.co.uk/atari/last/ Alison Challis http://www.alisonchallis.moonfruit.com/ Alisons Website Mirror http://pest.atari.org/www.logicsays.c... ... https://www.youtube.com/watch?v=P3fscX057gQ

A video covering the repair of RAM on a Spectrum +2. Also covers fixing the video out problem related to the transistor mounted incorrectly at manufacture. Later in the video I do a mod to allow me to load games from iPhone, CD or MP3 player. Awesome Spectrum repair channel link below:- JoulesPerCoulomb https://www.youtube.com/user/JoulesperCoulomb ... https://www.youtube.com/watch?v=QpnfQcR69sI

A quick look at the latest version of the VIC-20 Penultimate Cartridge from thefuturewas8bit.com and Tynemouth Software. In this video I also take a quick look at the homebrew game 'Pentagrat', which you can buy from thefuturewas8bit.com. You can buy the cart from here:- https://www.thefuturewas8bit.com/shop/commodore/pu-vic20.html or here:- http://blog.tynemouthsoftware.co.uk/2016/06/vic20-penultimate-cartridge-part-4.html You can buy Pentagorat from here:- https://www.thefuturewas8bit.com/shop/commodore/vic-20-games.html And my previous review video can be seen here:- https://www.youtube.com/watch?v=ByNCK-GhJQM ... https://www.youtube.com/watch?v=LBfAAYIZUv4

A short video showing how I boosted my ACA1220 to 33Mhz. Update 14/02/2016 : 40Mhz + 120Mhz memory combination won't work - due to wait states being required I think. This means the maximum you can run an 020 on the ACA1220 is 33Mhz. Unless there's a way to change the CPU clock divider from /3 to /2. Ideally I would like to run memory at 100Mhz and CPU at 50Mhz. The new 25Mhz 020 I've fitted is barely luke warm at 33Mhz so it doesn't need a heatsink now. It might be possible to swap the RAM out for faster RAM that might not require the same delay this RAM needs when running over 100Mhz. In order to get 33Mhz you don't need to swap out the Crystal. You can just set R1 and R4. r2 none = 5.333x r2 r3 = 5x none r4 = 2.5x none none = 2x none r3 = 3.333x r1 r4 = 6x r1 none = 3x r1 r3 = 8x ... https://www.youtube.com/watch?v=P3OBIWBNa5w