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Dave W Plummer

@davepl1968101,987 subscribers

Hi! I'm Dave Plummer. You might remember me from such Windows components as Task Manager, Windows Pinball, Calc, ZIPFolders, Product Activation, etc. Cheers!

Shorts

I'm fortunate to have the means to buy the cheapest life insurance of all: - Professional Brake Jobs - Someone else puts up my Christmas lights - A contractor hangs my ceiling fan - Electricians are for anything over 48V I'm much too important and good-looking to die from some nonsense like stepping off a ladder...

I'm fortunate to have the means to buy the cheapest life insurance of all: - Professional Brake Jobs - Someone else puts up my Christmas lights - A contractor hangs my ceiling fan - Electricians are for anything over 48V I'm much too important and good-looking to die from some nonsense like stepping off a ladder...

50,005 görüntüleme

I installed a UniFi camera at the end of my driveway to monitor for incoming vehicles. When the AI Key detects a vehicle, it labels it and plays a chime/alert over the house audio. This replaces the old "Infra Red Chamberlain Remote Relay" system pretty effectively! As long as it works in the dark, too...

I installed a UniFi camera at the end of my driveway to monitor for incoming vehicles. When the AI Key detects a vehicle, it labels it and plays a chime/alert over the house audio. This replaces the old "Infra Red Chamberlain Remote Relay" system pretty effectively! As long as it works in the dark, too...

210,378 görüntüleme

I bought one of the Vector displays from the movie WAR GAMES, and here's how I brought it back to life and got it drawing again! ESP32, C++, Python! Code included.

I bought one of the Vector displays from the movie WAR GAMES, and here's how I brought it back to life and got it drawing again! ESP32, C++, Python! Code included.

79,673 görüntüleme

You used to see these on the wall of every computer science lab, but I'd never written one... so I wrote one this morning! It's under 200 lines, code in the comments. And if you like these littlle code excursions, follow me, and I'll keep doing them!

You used to see these on the wall of every computer science lab, but I'd never written one... so I wrote one this morning! It's under 200 lines, code in the comments. And if you like these littlle code excursions, follow me, and I'll keep doing them!

77,817 görüntüleme

I bet you've never noticed this ultra-cool but rather complicated "cone of prediction" at the center of Windows context menus? It allows the system to predict that you're aiming for a flyout. Well, that's because Windows (at least in the old days) didn't do any such fanciness. It just uses a timeout of 400ms, and it's always worked pretty well. It's even adjustable (SPI_SETMENUSHOWDELAY) these days, but used to just be 80% of your double-click speed setting. So the faster your reflexes were - per that setting, at least - the shorter your menu flyout allowance. No cone needed. ( I stole this from a Raymond Chen hockey card that I keep tucked up in my 50 Mission Cap ).

I bet you've never noticed this ultra-cool but rather complicated "cone of prediction" at the center of Windows context menus? It allows the system to predict that you're aiming for a flyout. Well, that's because Windows (at least in the old days) didn't do any such fanciness. It just uses a timeout of 400ms, and it's always worked pretty well. It's even adjustable (SPI_SETMENUSHOWDELAY) these days, but used to just be 80% of your double-click speed setting. So the faster your reflexes were - per that setting, at least - the shorter your menu flyout allowance. No cone needed. ( I stole this from a Raymond Chen hockey card that I keep tucked up in my 50 Mission Cap ).

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My AI broke the world record on Tempest yesterday! But I still hold the human record :-) [on Extreme difficulty settings] Here's a little demo reel of the Tempest AI doing inference and training at the same time up on the hardest Tempest levels. This is all running on our Dell Technologies 7875 Workstation, with the 9995WX CPU handling 2000 fps of Tempest while the dual Blackwell RTX6000 GPUs do inference and training.

My AI broke the world record on Tempest yesterday! But I still hold the human record :-) [on Extreme difficulty settings] Here's a little demo reel of the Tempest AI doing inference and training at the same time up on the hardest Tempest levels. This is all running on our Dell Technologies 7875 Workstation, with the 9995WX CPU handling 2000 fps of Tempest while the dual Blackwell RTX6000 GPUs do inference and training.

37,357 görüntüleme

There's no BASIC interpreter for 211BSD UNIX, so I wrote one this morning (with some codex help!). Code below! I targeted CBM BASIC v2 as the language reference, and it's reasonably close. This sample program runs nicely! 10 for a=0 to 100000 step .2 20 print tab(40+40*sin(a));"*" 25 sleep 1 30 next a The code runs on MacOS and 211BSD and probably Linux, too:

There's no BASIC interpreter for 211BSD UNIX, so I wrote one this morning (with some codex help!). Code below! I targeted CBM BASIC v2 as the language reference, and it's reasonably close. This sample program runs nicely! 10 for a=0 to 100000 step .2 20 print tab(40+40*sin(a));"*" 25 sleep 1 30 next a The code runs on MacOS and 211BSD and probably Linux, too:

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Uh oh... that can't be good!

Uh oh... that can't be good!

55,306 görüntüleme

A little video of the PDP-11/83 booted from the RA82...

A little video of the PDP-11/83 booted from the RA82...

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This is the PDP-11/83 I've been working on... it's got a lot of pretty das blinkenlights! It's running 211BSD UNIX that I custom compiled to make it all work. I had to tweak the kernel's idle loop to get the display panel to work, as this setup uses fast PMI (private memory interface) between the RAM and CPU, so the panel can't see it happen unless you cheat a little! The dual floppy unit is wild... a single stepper motor moves the heads on BOTH drives at the same time, so they're like conjoined drives. The bus spans three chassis, which are the three grey boxes. So unlike a PC, you can just "add most slots" and keep going to your heart's content!

This is the PDP-11/83 I've been working on... it's got a lot of pretty das blinkenlights! It's running 211BSD UNIX that I custom compiled to make it all work. I had to tweak the kernel's idle loop to get the display panel to work, as this setup uses fast PMI (private memory interface) between the RAM and CPU, so the panel can't see it happen unless you cheat a little! The dual floppy unit is wild... a single stepper motor moves the heads on BOTH drives at the same time, so they're like conjoined drives. The bus spans three chassis, which are the three grey boxes. So unlike a PC, you can just "add most slots" and keep going to your heart's content!

43,337 görüntüleme

This guy needed a soundtrack, so I added one...

This guy needed a soundtrack, so I added one...

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Remember the Thinking Machines CM5 in the background of Jurassic Park? I wanted to copy the CM5 LED effect for my VAX, so I reached out to one of the original designers, Tamiko. He said that Thinking Machines' president, Sheryl Handler, had asked if the CM lights could be made to blink in a "Random and Pleasing manner". Apparently, Don Aronson wrote the R&P effect for the CM-2, but I'm still waiting to hear back from him! In the meantime, I did my best take based on what you see in the movie...

Remember the Thinking Machines CM5 in the background of Jurassic Park? I wanted to copy the CM5 LED effect for my VAX, so I reached out to one of the original designers, Tamiko. He said that Thinking Machines' president, Sheryl Handler, had asked if the CM lights could be made to blink in a "Random and Pleasing manner". Apparently, Don Aronson wrote the R&P effect for the CM-2, but I'm still waiting to hear back from him! In the meantime, I did my best take based on what you see in the movie...

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Grok 3 coded an ASCII/VT220 version of Breakout for original K&R C running under 211BSD on a PDP-11/83! I can't get the soft fonts rendering properly... if you know how to fix it, here's the code!

Grok 3 coded an ASCII/VT220 version of Breakout for original K&R C running under 211BSD on a PDP-11/83! I can't get the soft fonts rendering properly... if you know how to fix it, here's the code!

28,846 görüntüleme

You had to have balls of steel back in my day. (Microsoft Mouse 1.0 on a PC 5160 that also features an original Microsoft Mach 10 turbo card)

You had to have balls of steel back in my day. (Microsoft Mouse 1.0 on a PC 5160 that also features an original Microsoft Mach 10 turbo card)

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My bench...

My bench...

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New vs Old! Epyc 64-Core CPU vs DEC VAX! I like to compare weird things on an even playing field, and so I installed NetBSD 10.1 on both a VAX 4000-705A and on an Epyc 8534P, 64-core CPU with 128GB of RAM. The 1993 VAX runs at 112MHz (pretty fast for a VAX!) Then I set them both to building the NetBSD source tree. Epyc on the top, VAX on the bottom. And this VAX is at least 50x as fast as the original VAX 11/780!

New vs Old! Epyc 64-Core CPU vs DEC VAX! I like to compare weird things on an even playing field, and so I installed NetBSD 10.1 on both a VAX 4000-705A and on an Epyc 8534P, 64-core CPU with 128GB of RAM. The 1993 VAX runs at 112MHz (pretty fast for a VAX!) Then I set them both to building the NetBSD source tree. Epyc on the top, VAX on the bottom. And this VAX is at least 50x as fast as the original VAX 11/780!

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Oh no... that's not good!

Oh no... that's not good!

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I connected a 48x16 LED matrix to an ESP32... Code on Github at:

I connected a 48x16 LED matrix to an ESP32... Code on Github at:

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I was surprised I was able to get a VT220 to scroll "backwards" this fast! Running at 19200 helps... Code at:

I was surprised I was able to get a VT220 to scroll "backwards" this fast! Running at 19200 helps... Code at:

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Videos

davepl1968's profile picture

He was the multimillionaire software visionary that created the Zip file format still used almost universally to this day. And now, at the age of just 37, Phil Katz was dead. His life came to an inglorious ending in a lonely hotel room somewhere in Milwaukee County, Wisconsin. He had a home nearby, and the cops had been summoned to it at least once before when neighbors complained of odors, insects, and mice infesting the neighboring luxury apartments. Once inside, the police were confronted with knee-deep garbage, decaying food scraps, and much more. When they later found his lifeless body slumped against a nightstand in that dingy south side hotel room, he was still cradling an empty bottle of liquor. A half dozen similar bottles littered the room. He was completely alone now, having long since been estranged from his family and now virtually a stranger even to the employees of his own company. His body could no longer sustain the abuse from years of chronic alcoholism, and he died alone that night of acute pancreatic bleeding. The Dark History of Zip Files: you might already know that I wrote the Zip file support that's been in Windows for about 30 years... But I had nothing to do with the creation of the Zip format, which goes back to Phil Katz. This is his tragic and cautionary tale... as told by me. I never met Phil before he died. I'd like to think that before he started his descent into darkness, we'd have a lot to talk about.

Dave W Plummer

301,628 görüntüleme • 4 gün önce

davepl1968's profile picture

But why is my upload so slow?

Dave W Plummer

23,486 görüntüleme • 21 gün önce