@root42@chaos.social
@root42@chaos.social avatar

root42

@root42@chaos.social

https://www.youtube.com/root42
Coding, tinkering, ancient hardware and software.
he/him
#retrogaming #letscode #demoscene
If you want to support me, you can do so at the links below. I also have Ko-Fi, but there aren’t enough entries…

This profile is from a federated server and may be incomplete. Browse more on the original instance.

logicalerror, to random
@logicalerror@mastodon.gamedev.place avatar

If AD HD exists, does AD SD exist too?

root42,
@root42@chaos.social avatar

@logicalerror or ADUHD

root42, to random
@root42@chaos.social avatar

TIL pmset(1) is a powerful command for macOS power management. Including repeating shutdowns and similar things. Much more features than exposed in system settings.

dentaku, to random German
@dentaku@fnordon.de avatar

Die LLMs machen exakt das, wofür sie gedacht sind: plausibel klingenden Text ausgeben. Es kann durch die Funktionsweise nicht garantiert werden, dass die im Text enthaltenen Informationen alle korrekt sind.

Leider scheinen das immer mehr Leute zu vergessen, und so landen LLMs an immer mehr Orten, wo sie nicht sonderlich hilfreich sind.

root42,
@root42@chaos.social avatar

@dentaku @Fischblog Auf jeden Fall hat das gezeigt, dass der Turingtest doch ziemliche Mängel hat. Oder, dass ihr alle einfach nur sehr überzeugende LLMs seid!

DavidBFox, to random
@DavidBFox@mastodon.gamedev.place avatar

video coming soon. Anyone want to guess what's in here?

video/mp4

root42,
@root42@chaos.social avatar

@DavidBFox a whiteboard to draw the puzzle graph for Thimbleweed Park 2?

__sharky__, to ChatGPT
@__sharky__@mastodon.social avatar

Have you used for learning new things ? I am trying to use it to learn . I have heard it is not very good in writing clojure code , but for me it is more to have exercises I enjoy and are not too hard to solve and if I don't have a clue I can ask for help.

root42,
@root42@chaos.social avatar

@__sharky__ why not ask a fellow human or use a book? Clojure for the true and brave is a good start.

mrdoornbos, to random
@mrdoornbos@mastodon.social avatar

Now that’s what I call a proper breakout board. Happy Thursday, go make something.

root42,
@root42@chaos.social avatar

@mrdoornbos German edition.

root42, to random German
@root42@chaos.social avatar

The story of the Z80

https://youtu.be/yfwR4aY5Qec?si=C6wmlIi1pfblIG6h

root42,
@root42@chaos.social avatar

@msh oh wow. This worked for me an hour ago.

reidrac, to random
@reidrac@mastodon.sdf.org avatar

It is going to be one of those days, isn't it?

root42,
@root42@chaos.social avatar

@reidrac same here.

root42, to random
@root42@chaos.social avatar

And these are the before and after pictures of the cast metal frame. I used deoxit and an old cloth and cotton buds to remove the dirt and cover the metal at the same time with the deoxit, which usually gives a very thin coating that will protect the metal. Smells horribly though. :)
I think I will need to lube the top and bottom ball bearings of the spindle. The top one I can reach easily. For the bottom one I probably have to unmount the flywheel, but I don't want to...

A much cleaner metal frame, with significantly less visible corrosion

root42,
@root42@chaos.social avatar

I got a hint that the 74LS74 flip flop divides the clock twice. First to 2MHz then to 1Mhz. But both outputs look misshapen and measure at 4MHz.

root42,
@root42@chaos.social avatar

Out with the old, in with the new.

A new TI 74LS74 in a precision machined socket.

root42,
@root42@chaos.social avatar

Oh wow. Suddenly we have 2Mhz and 1MHz signals!

A 1MHz waveform on the scope

root42,
@root42@chaos.social avatar

We have life! The machine boots!

video/mp4

root42,
@root42@chaos.social avatar

Next step is now to reactivate the power supply. I removed the mains filter and rewired all the connections using fresh solder and WAGO clips. I also cleaned the power cord. Afterwards I tested that GND is connected to all metal parts of the case, N and L have good continuity and low resistance and that the power switch works and properly opens and closes. I think this should be safe to turn on!

A now relatively clean, white power cord with European Schuko plug on a hardwood floor.

root42,
@root42@chaos.social avatar

The voltage without load looks good. I think it's safe to reinstall the mainboard and power it up. If it comes online, we can attach the drive mechanisms and cross our fingers! How are your bets?

root42,
@root42@chaos.social avatar

The board is in, and first power on test is successful.

root42,
@root42@chaos.social avatar

Drive unit 0 is attached and motor is spinning when closing the latch.

A hand closing the latch of the floppy drive. The motor starts spinning.

root42,
@root42@chaos.social avatar

@1024Bytes ...41 years old and I can repair it without great problems! Even have a service manual and schematics. Try that with current devices...

root42,
@root42@chaos.social avatar

Sadly, we still have issues. The HEADER command does nothing at all. Drive doesn't even go into error mode. No spinning and no head movement. Error channel lists error 10, no error string. That error isn't document in the manual...

Two CBM 8050 drives stacked on top of each other. The top one is turned on and has a green status LED.

root42,
@root42@chaos.social avatar

The DIRECTORY command does move the heads and spins the disk, but ends in an error LED lighting up. Error status in BASIC is still 10 / empty.

CBM 8050 with red LED lit up, indicating error.

root42,
@root42@chaos.social avatar

Well, if you plug the IEEE-488 plug all the way in, things suddenly start to work! @8bitgames 's Hibernated works, and PETSCII Robots, too!
I think this was a resounding success! From literal trash to treasure. I still have to do something about the rust on the top cover, as well as perhaps replacing the regulators with @elosha's low noise switching regulators, to protect the mainboard from future overvoltage events, and make it run much cooler. But at the start I never thought to get this far!

Two CBM 8050 drives on top of each other, top one turned on, and on the right side a CBM PET 3016 micro computer with black and white screen, and same black and white metal case as the floppy drives, showing a level of PETSCII Robots.
The CBM PET's screen showing the starting screen of Hibernated, This Place is Death by Stefan Vogt.

root42,
@root42@chaos.social avatar

@ColinHaynes Lots and lots of cleaning and lubricating, one dead TTL Chip, one shorted mains filter. Other than that it was fine!

root42,
@root42@chaos.social avatar

Drive 1 has some startup issues. Drive 0 seems fine though. I think either the motor or one of the bearings is still gummed up. After a few tries it starts working just fine. I mean, come one! If you spent the last thirty years in a damp basement you would need a couple of minutes to get up to speed right?
I can HEAR how it is turning too slow!

root42,
@root42@chaos.social avatar

@chriswho aren‘t they? And the manual specifically forbids you to stack them. Mainly for overheating reasons. The bottom one is off, so we are fine…

retrowelle, to retrogaming German
@retrowelle@social.cologne avatar

Zumindest ein Highlight für mich. Gestern auf einer sehr vollen Retrobörse in Oberhausen erstanden. „The Bard‘s Tale“ für den Commodore 64. Sogar mit handgezeichneten Maps vom Vorbesitzer 🥰

image/png

root42,
@root42@chaos.social avatar

@retrowelle CC @burgerbecky Look, a die hard Bard's Tale fan! :)

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