C128Neo - Johan Grip

[@allanrobbins949]

good stuff keep up the good work ....i want to see the 128 reborn!!!!!!......i will buy when your job is completed......like your approach......

[@vcfederation]

This is a great product. We love how there are new products made for old computers. And it is great to have a reengineered machine. The older machines won't last forever!

[@carpetbomberz]

It's amazing to see Johan retrace his steps in teaching himself things. Each step of the way, incrementally, bit by bit things move further down into the components, until he's got the Conway and Mead VLSI text book. And I never knew it was NMOS specific, but given the year it came out, makes sense CMOS took a little while to dominate after VLSI was published. Nice little historical milestone that.

[@carpetbomberz]

And the rabbit holes Johan has dived down into remind me so much of what Ken Shirriff has also followed in his process of discovering, documenting and reverse engineering microchip designs.

[@vcfederation]

Yes. I like stories like this where someone learns bit by bit.

[@vcfederation]

I love the reality of making mistakes, then revising and reconsidering.

[@griffinretro]

It has proven to be really hard to start studying NMOS design. Not many resources online and muost of what is there is written by people in the know for other people in the know. That book from Conway and Mead really helped me understand things, I learned that you have to understand the manufacturing process to understand design and vice versa. Hard to convey in a video how much time is spent just trying to wrap your head around things.

[@AmauryJacquot]

where's Bill Herd's reaction video ? 🤣

[@vcfederation]

Well was in the audience for one of his talks, so in a way he did react ;) We are glad that you liked this video so much and your support for our organization. Please spread the word!

[@griffinretro]

Right here: kzbin.info/www/bejne/fpDXZ4Csa69rqsU :)

[@tomrates]

The audio quality is atrocious! Can you upload the screen recording of the remote session with original audio directly captured from the PC-not the video and audio as recorded in the auditorium with horrible acoustics and echo. And leave this recording up if anyone wants to see the presentation as it was live.

[@br9809]

It gets better eventually

[@tomrates]

@@br9809 I fast forwarded and it looks like it does. You’re right. However, his slide takes up some thing like 1/9 of the screen. And with the glare of the lights, I can barely see them part of the time. I understand the format and advantage of watching a presenter in person performing a presentation, but with a remote presentation like this, I think it would make more sense to just upload the remote session screen recording and audio. Or at least the camera man could focus in on the projector screen. This is great content but it’s difficult to view at times and difficult to hear at times.

[@winstonsmith478]

@@tomrates OR zoom (or move) in so the projection screen fills the video frame.

[@RetroAnachronist]

Shame they didn’t do a direct video capture of his slides for this video.

[@vcfederation]

Yes. Sorry about that. I will look into uploading the Zoom version of this remote talk. The sound technician discovered the problem after some minutes.

[@griffinretro]

The slide deck can be downloaded from c128.se/downloads/VCF-West-22.pdf

[@tomrates]

Thank you so much for your content and providing the original source slides!

[@vcfederation]

Thank you for posting that link Johan!