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Bolacore

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  1. I did see it, but the DREM would have had a €70 or more import cost, which would've made it quite a pricey option. Plus I like that the software for the BeagleBone is open source, it's been fun reading through how it works, and I can manage it over WiFi to switch out virtual drives as needed.
  2. Right, I wasn't fussed about the costs myself, it was purely to get my own system going again - compatible drives in the Netherlands seemed to be going for €150-300 with no real guarantee they worked. I think this whole setup cost me maybe €110 in total.
  3. Of course - on the premade BeagleBone image, this software is all installed on it already. To run this command, you'd plug a USB cable into the BeagleBone, and then SSH to it by doing "ssh debian@192.168.7.2" (It always has this IP) in a Terminal on macOS. Then you'd switch to root with "sudo su", and then "cd ~/mfm", then you can run the command above. This command just creates the virtual hard disk with the size specified - once you've run this once, you don't need to do it again. You can also run this again to create a fresh image, or to have multiple virtual hard drives if you
  4. Right now it's the original 21-ish MiB of the original drive, which gives 18MiB formatted. The size is hard coded in the ROMs, and there's no option to specify the number of cylinders/heads in the HyperDrive software. AFAIK there was no way to discover the size of a drive with the ST-506 interface either, so, you'd be stuck with whatever size the board was made for.
  5. Here it is: hyperdrive-mount.stl. Mines currently stuck down with some strong double sided tape since I didn't want to drill any more holes. I'm sure you could extend it a bit to hook into where the power supply mounts. It's a tight fit, but it holds the board very snugly in place.
  6. A while ago I picked up this Macintosh 128K (Original repair thread above), and it turned out to be a HyperDrive 20 equipped system with a 512Ke board. After repairs the board was functional, but mine was missing both the hard drive and the power supply, and trying to find an original compatible drive was incredibly difficult. I instead decided to get this working with an MFM emulator, and it works brilliantly. I wanted to post this here, so if anyone else in the future has a need for a replacement drive (or even power supply) they can use this Firstly, the power supply: I replace
  7. Hello there - I recently tried installing 7.5.5 on my SE/30, and after 23 something floppies it installed just fine. Everything works correctly on it, but I noticed if I use the Shutdown or Restart options in Finder it bombs with just "bus error". The restart button on that message works just fine. If I boot it back up with my 7.1 floppy, Shutdown+Restart work just fine. Any idea why it would bomb like this? Not sure if the install was a bit corrupted, or if there's some other issue. Board is recapped and in good shape.
  8. Finally found the fault, a 74LS166. Works great now
  9. Really looking forward to getting this one working, never owned an original Macintosh before. Even more so to get the HyperDrive working, would be cool to have one of the few working units in the world
  10. Almost got this one working! Good few patch wires at this point, and a new 74LS166. We're now booting and are functional beyond a weird screen. Since it works perfectly other than that, I suspect one of the 74xx ICs for the video generation are also faulty. I will get this stubborn Mac going
  11. Taking another look after work and there's rotten traces from battery damage near the TSM IC. Started patching wires and now we have video on the screen, albeit just garbage. Does anyone have a nice high res schematic of the 512K board? The only one I can find is the official apple one, but it's very hard to read.
  12. I picked up a rather interesting 128K and it finally showed up this week. It's quite an early one as it just has a Macintosh badge instead of the later 128K/512K ones, but was upgraded with a HyperDrive 20 rev 2 and 512K board. I've been trying to get it working, and after patching it's analog board, I'm now getting just a humming sound from what appears to be the analog board (I can't really tell) and no video at all. The sounds reminds me of my aquarium air pump, with a slight whistle to it. No video at all when this happens, but I still see the CRT is on with the glow from the heater. It d
  13. The only other part would be getting the GAL equations, as it has a handful of them on the board. Apart from that, you could probably figure it out if you had the time and clone it, although I'd imagine you could greatly simplify it with an FPGA.
  14. Hello, just wanted to share I've uploaded the v2.1 ROMs for the Radius 16/25 accelerator for the SE. I've not found another copy online, so hopefully this helps someone who wants to run Sys 7.1/7.0 on their SE with Radius card. Link: https://www.macintoshrepository.org/27255-radius-se-accelerator-2-1-roms
  15. I recently picked up an LC that had a TDK power supply with lots of leaky caps. When powered on one of the big TO220 diodes would get red hot. The back side of the power supply is all black as well, presumably from being run when shorted. I've replaced all the caps, resoldered all the joints on the low voltage side, and now it longer heats up, but just clicks. If I put the output on a scope it rises and falls with the clicks, but all 3 rails hit the right voltage before the click. Does it once every 1.5s or so. Under load it does it every ~1s and the output sags down to a couple vo
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