Recent content by Bolacore

I've checked the ones I've replaced already and so far it seems ok. It seems to be the exact same symptoms as this person here: https://goughlui.com/2016/09/24/repair-apple-macintosh-powerbook-100-gotta-re-cap-em-all/ The board was really in great shape as far as i saw, but I'll get it under...

Hi there, I'm trying to track down an odd issue on a PB100. It's been recapped and cleaned (LCD and inverter too) and works flawlessly at first, but after it's been on for an hour or two any open windows start turning black like this: If i move or close the windows it lightens up in that area...

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. 

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. 

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...

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...

Here it is: . 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. 

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...

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...

Finally found the fault, a 74LS166. Works great now

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  :beige:

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 :)

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...

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...

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.