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Daniël Oosterhuis

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About Daniël Oosterhuis

  • Birthday 12/14/1998

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    Siddeburen, the Netherlands

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  1. Feeding VGA 31KHz to a Classic II CRT?

    It's quite neat, but sadly he hasn't done more than get the BeagleBone board to display a static image on the CRT. It's a matter of either getting the Mac Classic up to 24KHz (people tried this before without real success from what I can tell), the Bondi board down to 22KHz (which I have no idea how to achieve this or if it is even possible), or doing a swap with one of those monochrome VGA CRTs.
  2. Feeding VGA 31KHz to a Classic II CRT?

    Yeah, that might be a bit of roadblock. Now I'm wondering, what if I could attempt to force the Bondi board to run at 512x342? That might get it on-spec to work with the internal CRT, but I don't know if this is a possibility. Just getting an (S)VGA 9" Monochrome monitor would be the easiest way to make the Mac Classic G3, but if I can manage to use the original guts, that'd be even better. Plus, I can't seem to find these monitors very easily over here.
  3. Feeding VGA 31KHz to a Classic II CRT?

    Darn, the thread you linked has three threads with what looks to be good info on what I want to do as well, totally dead. I might actually not need to bother with KHz conversion. Basically, my plan is to stick a Bondi iMac board, salvaged from a dying CRT/PSU chassis, and stick it in the Classic to make a Macintosh Classic G3. I noticed when I had to board connected to my Multiple Scan 17 monitor, I could push it back to 512x384@60Hz, which I think runs at 24.5KHz? If I could knock it down to 22KHz, all I need to do is feed the right signals to the CRT circuitry and grayscale neckboard, it should work. I just need to figure out where the R/G/B/H/V signals go, and I suppose these three threads might have had some info on that: https://68kmla.org/forums/index.php?/topic/19351-raspberry-piclassic-crt/ https://68kmla.org/forums/index.php?/topic/5045-mac-classic-bw-grayscale-vga-mod/ https://68kmla.org/forums/index.php?/topic/11043-vga-on-compact-crt/
  4. Feeding VGA 31KHz to a Classic II CRT?

    Hello all, I had a bit of a crazy idea for repurprosing my dead Classic II. Now, to do this, I'd have to be able to feed a VGA 31KHz signal to the internal B/W CRT in the Mac. Of course, it doesn't take that, so I'm wondering if anyone knows how I could modify the CRT driver to allow this? One thing I wondered about is the Micron Xceed, what video signal does it feed to its proprietary neckboard? If it's anything analog, it would be a heck of a lot easier to convert a VGA signal to that, if it doesn't already use such a signal itself. With that, I could attempt to make a neckboard replica, then feed it the appropriate signal and use the CRT that way. If anyone has any idea on it, please let me know! TIA!
  5. iMac G3 (Rev A -> C) G4 CPU Upgrade

    @dosdude1 is at it again, this time upgrading a Trayloader iMac G3. He's figured out how to change the core voltage on the card, which is necessary when the G3 chip on the card is a ARX Motorola 750, which run at higher voltages that will damage the Motorola 7400 G4 CPU (see the previous post for more info). @LightBulbFun and I have been trying to figure out what sets the Vcore on these cards, so I am very glad @dosdude1 and him figured out that a set of specific resistors does this.
  6. Mounting PPC750GXs & PPC750FXs on ZIFs

    The 603/604 and 740 compatibility isn't exactly new, @LightBulbFun has been planning on doing such an upgrade for a while, I think he indicated it once in the iMac G3 -> G4 thread. Also, the Wikipedia pages on PowerPC are fairly solid, the main guy working on them, Henriok, knows his stuff. He's also the one who made all the very nice PowerPC CPU renders shown on those pages.
  7. Mounting PPC750GXs & PPC750FXs on ZIFs

    You know, PowerLogix already did this with their Pismo G3 upgrades. They took the stock card, soldered on an adapter board, then soldered either a 750FX or GX on top of that (the 750FX, 750GX, 750FL, and 750GL are all pin compatible with eachother), and gave you a smaller heatsink to make it all fit. Here is a blog post of someone showing you how to mod the stock Apple cooler for better thermals, which has some good photos of said adapter board. So yes, it should technically be possible to do this, if one was to make an adapter board. I've heard through the grapevine that someone on this forum is looking at doing that, but I'll let them announce that if that is the case.
  8. AppleCD Plus M3021 won't mount cd's and cd-roms

    The iron should be OK for removing the old capacitors, you might want to grab some flux and solder braid to remove the old solder. With these SMD capacitors, heating up the other side is not needed as the solder joint is mounted on the surface of the PCB, hence the name. However, should you have any difficulties doing this repair, I'm more than happy to lend a hand. I have a hot air soldering station, which makes replacing SMD caps a breeze. I'd gladly replace the caps for you if you want, I just am waiting on some solder paste to come my way from the slowboat from China, then I should have everything needed for a simple recap job. I'm going to have to do some recapping on my Macintoshes soon, I've started out with my iron on my SE/30, but got really frustrated at how hard it is to solder the caps down due to the small leads. Having practiced a bit with my hot air station, removing the caps without damaging the board so far has been really easy, and soldering new caps back on should be just as easy.
  9. iMac G3 (Rev A -> C) G4 CPU Upgrade

    @dosdude1 happened to do the same mod as @LightBulbFun at almost the same time. Here is his video on his completed Clamshell G4, which runs at 500MHz, but has a custom active cooling system installed.
  10. My new Colour Classic is tripping on acid

    No way that bad VRAM is going to create color distortion that looks that distinctively as a magnetized CRT monitor. Especially his mention of the French flag regaining its colors temporarily when degaussing debunks that.
  11. iMac G3 Fruit Colors vs iBook G3 Fruit Colors

    In my experience, the iBooks will likely be more reliable in the future than the iMacs will be. With all of my iMac G3s, I've had CRT/PSU related issues, and getting to the CRT and power supply board in them, especially with the earlier trayloading models, is a nightmare. While the iBook Clamshells are also rather difficult to disassemble, I haven't heard of much problems with them, other than maybe needing a new hard drive, and having dead batteries of course. The earlier "ice" iBook Clamshells do have a tendency to develop cracks in certain areas, like the little Apple logo under the display. The "ice" iBooks are the Blueberry, Tangerine and first gen Graphite. The second generation of iBooks consisted of Lime, Graphite, and Indigo, and instead of having an ice-like look to the plastic, they have white plastic, which fixed the cracking problem. One downside of course, is that Apple seriously ramped down the color options on the Clamshells. I never understood why they didn't put out at least Strawberry, Grape, and Lime when they launched the Clamshell iBook. I mean, yeah, they eventually did make a Lime iBook, but it's a different color from the lush, dark green of the Lime iMacs, and was an Apple Online Store exclusive, which meant fewer were sold, making them rare nowadays. And the second generation Clamshells never got Sage, Ruby, Blue Dalmation or Flower Power either (Technically not Snow either, but white on white probably wouldn't have looked all that great, and the Snow iBook G3 that replaced the Clamshell makes it a moot point). It's just a pity, because I'd have loved to collect those colors of Clamshell! Anyways, long story short: The Clamshells are definitely a reliable choice, and space-saving to boot. But if you want to collect more colors, the iMac G3 can't be beat.
  12. iMac G3 (Rev A -> C) G4 CPU Upgrade

    That does make me wonder if a PowerLogix G3 ZIF card, like @LightBulbFun has, would work on those IBMs. Like he said, all there's to those cards is either the 750FX or 750GX, and some passives.
  13. iMac G3 (Rev A -> C) G4 CPU Upgrade

    You can't. The 750CX used in the 700MHz iMac G3 isn't in the same BGA package. It's like attempting to put an LGA1156 CPU in an LGA775 socket. Unless you design a ZIF PCB that can take the CX, which would be fairly difficult as no one has reverse engineered the ZIF cards (yet), as far as I know.
  14. iMac G3 (Rev A -> C) G4 CPU Upgrade

    So I've finally ordered a hot air station, and I'm slowly getting closer to finally being able to take the CPU board out of my trashed, dead iMac G3 Tangerine (whose logic board one day will be put in a desktop case, and used as a standalone desktop PPC machine, since it's just the CRT that's gone bad), and upgrade it to a 7410 G4 processor I've had lying around for way too long now. But, that's not all I'm going to try. It's my intention to attempt to take the processor out of a dead Nintendo GameCube, and put it on an iBook G3 logic board. Now, before you call me absolutely nuts, let me explain. The IBM Gekko processor in the GameCube is based on the 750CXe, and looks identical to it. If my findings are correct, the chip should be the same size as the 750CX line, and have the same amount of pins, presumably all mapped the same except for maybe some special pins for the GameCube that the regular 750CX processors do not use. Either way, I'll be attempting to get one or two dead GameCubes to get the CPU out of, and then compare them size-wise to the CX in one of my iMac G3s. If the size is the same, I'll find a dead iBook G3 logic board with the CX(e) processor, and try my luck with that. There's really no point other than to be the first guy to try this, and potentially have the first ever Mac with a GameCube brain transplant Also, I've found out that the IBM Broadway processor used in the Wii is a 750CL, a processor that wasn't ever used in any PowerPC Mac, but seemingly has the same pinout and size as the 750FX and 750GX chips, both found in either PowerPC Macs, or upgrade cards. Other than a few discrepancies, specifically the lack of dual PLL on the 750CL, it might just work on an iBook G3 logic board with a 750FX processor. In QEMU-KVM, the 750CL processor option actually did allow OS X to boot, but while About This Mac knew it was a 750 processor, CHUD Tools just reported the processor to be a "PowerPC ". So it's definitely an interesting thought to see what an actual 750CL would do in a Mac. This would be the closest thing to Mac OS X running on a GameCube and/or Wii! And yes, I am a mad PowerPC scientist.
  15. 3D-Printed Objects

    With a script, a motor and a gearbox, that shouldn't be impossible to do with a RPi.