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!
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!
After lubricating drive 1 and adjusting its speed using the potentiometer on the analog board, it is running reasonably well. Next up: replacing the voltage regulators with ultra low noise switching ones. The old ones are fine but the cases have a bit of corrosion and they produce much more heat than the new ones. The new regulators also have protection should something go haywire.
But I won't give up quite yet. If the motors work, and if the head is good (it measures fine), maybe we can restore this thing and/or use the mechanism on the other drive. This will require partial disassembly of the mechanism and lots of scrubbing, oiling and lubrication.
And there we go again! Laary 3 is on. Never played this one either! From the get go it already seems a bit more polished and seems to have more of a musical score, which is nice
I sent one of my dead Commodore 1541 floppy drive heads to someone with access to a high resolution CT scanner. They did a lot of HARD work and came back with super high resolution scans of the head and a possible place where the coil has been damaged. I am SUPER impressed.
New video: Let's Code MS DOS 0x26: AdLib Drum Machine
Programming the OPL2 FM chip on the original AdLib card can be a bit tedious. Join me in this episode to learn how to program the drums on the AdLib card to create a simple sequencer or drum machine. In the future we will also look at the melodic instruments, but for now we try to create some nice percussion!
I think Wario Land 2 uses more than four shades of gray. The DMG only supported four grayscales, but I think I can count more in this shot. Probably they use some temporal dithering, e.g. mixing two different shades in alternating frames to get a third shade. Does anyone have additional information? #nintendo#gameboy
New video: Original GameBoy: IPS Mod Horizontal Lines
The IPS display mod for the original GameBoy from a couple of weeks ago already developed a fault. bright horizontal lines run through the display, and it seems a full replacement of the LCD panel is needed. It seems these mods are a bit fragile. Also the display lens is a bit crooked and needs fixing. So off to another round of DMG modding!
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…