Diomidis Spinellis
The video of my #FOSDEM 2026 talk on integrating the Fourth Research Edition Unix tape into the GitHub Unix history repository is now available online: https://ftp.belnet.be/mirror/FOSDEM/video/2026/h2215/DCDAUY-the_v4_tape_in_the_unix_history_repo.av1.webm
Feb 2 at 10:16pmWeb
Show threadARGVMI~1.PIFFeb 3

@CoolSWEng

What's that device that looks like a Mac Mini? Because judging from the wires coming out of it, it is very very not a Mac Mini. 😳

Show threadDiomidis SpinellisFeb 3
@argv_minus_one It's most likely a Saleae oscilloscope, used as a multi-channel A/D converter.
Show threadThalia ArchibaldFeb 4
@CoolSWEng Is the first photo a look inside Al’s tape drive? I didn’t get a good look inside. The second photo is mine. I wish I had a better photo that showed the waveform live on screen as it was being read, but it’s still pretty good.
Show threadbitsavers.orgFeb 4

@thalia @CoolSWEng

It is Len's Saleae (mine is black)

You can get an image of the recovered analog data by playing back the .sal file in Logic 2 (you don't need the hardware to do that)

Show threadDiomidis SpinellisFeb 4
@thalia The photo of the red Saleae comes from Len Shustek's 2020 talk slides https://github.com/LenShustek/readtape/blob/master/VCF_Aug2020_01.pdf It's credited in the slides, but maybe not visible in the video.
readtape/VCF_Aug2020_01.pdf at master · LenShustek/readtape

Decode the analog waveform extracted from old computer mag tapes - LenShustek/readtape

GitHub
Show threadSven GeggusFeb 4
@CoolSWEng Do you have a link to the 39C3 talk you mentioned in your talk? I did not yet find it doing a quick search on https://media.ccc.de/
home - media.ccc.de

Video Streaming Portal des Chaos Computer Clubs

Show threadThalia ArchibaldFeb 4
@giggls Here’s Angelo’s message about his talk: https://mastodon.sdf.org/@aap/115803404031897905
aap (@[email protected])

My lightning talk on #unix v4 at #39c3 https://media.ccc.de/v/39c3-lightning-talks-tag-3 starts at ca. 2:02:00

Mastodon @ SDF
Show threadDiomidis SpinellisFeb 4
@giggls Here is the link to Angelo Papenhoff's 39c3 talk on how he made the Unix v4 run on a PDP-11 emulator: https://media.ccc.de/v/39c3-lightning-talks-tag-3#t=6342
Lightning Talks - Tag 3

media.ccc.de
Show threadSven GeggusFeb 4
@CoolSWEng Thanks
Show threadAlex StadeFeb 4
@CoolSWEng incredible. To me this is watching a live excavation of the Colosseum or something. Thanks for sharing.