Recent content by This Does Not Compute

You could start by connecting the Mac to a power monitor like a Kill-a-Watt and see how much it draws. My guess is probably in the 50W range. Then it's simple math to figure out how long your battery pack of choice would run -- maybe it's enough as-is.

Schematics of a 16MHz EVT motherboard codenamed Metropolis, a prototype from early PowerBook Duo development. Since it features a 68030 processor it's likely that these are very close to production Duo 210/230/250/270 models -- but be careful that there might have been some revisions by the time...

I didn't even bother to troubleshoot my IPX's power supply, I just built a new one: https://github.com/hanshuebner/ipx-psu-replacement

This was a factory bodge done to early SE/30 boards. There was an error in the layout related to the video circuitry, without the fix the display slowly becomes garbled. The cut trace and bodge wire reroute one of the signals to circumvent the error and let manufacturing continue until the...

Sorry it took a while, but the Macintosh subforums have seen some consolidation -- there's just one section for Old World PPC machines now.

Generally speaking the 100-series PowerBooks are easy to work on. Just remove all the screws from the bottom and the one on the back (next to the modem slot), then separate the top case from the bottom. If you hinge it open from the back, you can lift the top case up just enough to reach in and...

The "LC and Performa" section has this as a description: Includes the AIO models with built in CRT. For PowerPC-based Performa systems, please see the Beige PowerPC section.

Honestly I don't think we would even need to split them -- a single Power Mac category is probably sufficient.

That would be 5 seats if we retain President, VP and Secretary roles in addition to those two. Or are you proposing that we eliminate some of those in favor of keeping Admins/Mods and Policies/Guidelines?

As a matter of bringing some perspective to this discussion, I reached out to hkz on Mastodon. Here's the statement I received:

If you can stretch the top end of the budget by $4, you can get a Rigol DHO802: https://www.rigolna.com/products/rigol-digital-oscilloscopes/dho800/ Like with the previous DS1054z and similar models, it looks like you can flash modified firmware to unlock 100MHz rates...

Looking at it from another angle: You don't have to use that specific standoff for the grounding lead, any of them will work.

P1 on the analog board is Molex part number 15311046, and the shell for the CRT cable side is 19091049. Both are available from Mouser/Digi-Key if you'd rather order them that way.

This is what I did. I used 3M VHB tape to stick the bare extender slot PCB to the bracket. I've attached the STL of a bracket I designed, but that reminds me I need to upload it to Printables too...

I'd give FWB CD-ROM Toolkit a shot instead of the patched Apple driver. I had one of those drives forever ago and I know it also worked to read CDs.