 From the vault. So what we're gonna do is we're gonna play the videos of some floppy work that we've been doing and also We have you want to just Give people a reason to stick around you have got your little game. Yeah, I'll show a little gamer Yeah, so yeah, so we have the the the the famous tiniest playable zoom a doom playing device Open let's open source one. Yeah, maybe maybe not okay So I'm gonna play the the floppy videos first and then I'm gonna play the latest thing that we did with the Doom player. So here we go What is this? I'm finishing up my last test for the cutie pie ESP 32 you get the text backwards the Pico Board that I designed and I've been working a lot with over the weekend. I'm doing some power tests This is I did functional tests over here By having it in this little cutie pie board so you can emulate NES games But for some people they really want low power functionality So I want to make sure I've got that all fixed up That's really hard to fix low power mistakes after the board's been sent out. So here is my ppk from Nordic and you can see You know normal functionality. It's about 40 milliamps. And then this is light sleep, so it's about 2.4 Milliams 2 to 3 milliamps and then for deep sleep when I turn off the neopixel I get down to about 70 microamps, which is great because the chip is about 50 microamps and the regulator is also about 20 So total about 70 Early data, what is this? Okay? I've had a lot of success over this weekend porting retro go over to the ESP 32 cutie pie That's this is gonna ESP 32 on the back of it a little bit like this. I said that's the C3 microSD iSquared C-expander on off switch Little lipo battery that I can stick here and a tft screen and I got nefrendo You know part of the retro go working when you want to play you want to play dragon warrior Sure. Oh wait. Sorry. That's a Different game new game And I've got even audio working out the headphones so you can actually start to play these games and test them out So very more is one of my favorite old-school rpgs. It's by epics pre-final fantasy But this is working and I only made one little mistake Audio is coming out of A3. It isn't coming out of A0, but I'll fix that on the next board wrap Okay, so nefrendo works fine on the ESP 32 cutie pie with this little board. Um, and I thought well, maybe let's do Um Game boy next so this is new boy go. Let's start a new game And I remember playing this I remember getting a game boy when I was very young It was like a birthday present. Maybe it was like 12. I don't know But uh, I played this game all the time. That's in tetris. I didn't have a game boy color They're just the uh game boy classic still. Um, it's a great little game and uh, I don't know I can't wait to like finish this. I don't think I actually finished it when I was a kid but um, all right, so, uh Game boy me later works the Nintendo emulator are gonna try a couple more emulators next Early later. What is this? Okay, so I'm taking a pause from the floppy stuff, but for a good reason. Um, this is an o dory go This is a really cool Like portable, you know game boy like emulator that had an esp 32 rover in it And it could load cards off an sd card and like there's a bunch of emulators written for it like On nefrendo and yes, uh new boy game boy Sega etc etc Um, I still have one of these are not made anymore, unfortunately, but this was really cool Actually was a really good little emulator, but what's nice is that I wanted to try to port um The emulator itself to the esp 32 pika so I can make like a really cute Little gaming things is my prototype and you can see I got the tft initialization like not quite right, but I do have tft on there And on the back is the cutie pie esp 32 and sd card And some circuitry battery charging and all that so, uh, it's slowly but surely coming together first sign of life Really dude. What is this? Uh, one more emulator that works in retro go is sega master systems, which means, um, you know, somebody was asking Can you play sonic and? Yes, you can get all the rings Oh, no Not very good scheme, uh The other thing uh, somebody was asking was uh, is there cheats for doom and the answer is Um, you know, you normally you would like type in stuff on your keyboard But with this You can go into the options menu And under cheats you can, you know, do the chainsaw and vulnerability 200 health get all the keys And all that uh makes the game lots of fun because you can, uh Give all the weapons from the start Come on Great for playing doom on the go with all your favorite weapons Early, dude. What is this? This is a, uh, three and a half inch hd floppy disk that has been formatted as a mac 800k I did that by tricking it by taping over the hole over here Um, and I put this in the power book 180 and formatted it. Thank you for the power book 180 Uh, it's 800k because 800k floppies are kind of interesting and I've been trying to read this on some of a standard PC sony or panasonic three and a half inch, uh floppy disk drive But what's interesting is it doesn't really work here get it with, um flux engine you can see, um The dots are sectors that read fine and you see like as you get to, um higher and higher tracks Um, you know the sectors don't show up and it's like they're okay for like the first few tracks But then they disappear. Well, the reason for that is actually kind of interesting mac 800k floppies are weird um Each track actually has a different number of sectors and the pulse widths change. So, um on the outer track Which is actually track zero the pulses are very short and as they get closer and closer to the center near the hub um, the pulses get wider because you want more, um magnetic media to pass under the head and, um for mfm floppies Which is what normal ibm floppies are for floppy disks. The track widths, um, sorry the bit widths don't change. They're like two four six Um microseconds and they're the same no matter what track they're on whether they're on Track zero all the way out here or track 80 all the way in here So if you're trying to read mac format floppies the outer tracks will read just fine Because they use the short bit widths, but as the bit widths get larger in time But stay the same in physical space these disk drives have trouble reading them So we might have to do some special math to get mac 800k floppies To work with this could also be the disk get itself more to come And that's our secret. Yeah. All right. We want to get some questions going