Recent content by RetroViator

I’ve seen some terrible cap leakage from those SMD caps on the daughter card, likely because of the heat from the PSU. My memory is hazy, but they may be involved in the soft start function from the keyboard power button. If that’s working, they may be okay for now.

FYI: The IIsi power supply is notorious for leaking caps. Both a couple of through holes on the end opposite the mains connection and the SMD caps on a daughter card. If they aren’t problem yet, they will be. Good luck!

He shared that he was using a 68hc705e1– an EPROM variant of the original IC. This link may be helpful: https://github.com/DosFox1/Raven-Programmer I believe he was working with @max1zzz to test the results. I pointed him toward this thread. Perhaps he will jump into the discussion.

Sure, selling them is great. As long as cool solutions get out there. :)

Impressive work finding a suitable solution! I appreciate those that can take on this level of research and add creativity. Are you planning on posting the details on how to obtain the IC and PCB?

Staggered terms are critical if the board moves beyond one year (which I support). Perhaps there is a randomized way to assign staggered terms (i.e. drawing names out of a hat), to establish a sensible rotation. Relatedly, it’s quite common for officers to rotate in position up to the chair.

Feeling good about my comfy new shirt.

I’m cleaning a long-sought-after M0116 keyboard to pair with my Macintosh SE. While cleaning, I noticed a small spring loose along the bottom of the keyboard’s case. This seemed important, but I didn’t see an obvious place for it to go. As space bars can be surprisingly exotic, I focused my...

While working on a troublesome LC II, I discovered the BOMARC schematics incorrectly depict the connections to the G1 and G2 oscillators. Based on my poking around, I believe they should be as follows: G1 - 25.175MHz Pin 1 - NC Pin 2 - Ground Pin 3 - UG5 (Pin 42) Pin 4 - 5v (c124) G2 -...

I’m currently working on an LC II, and noticed the shield has tabs that contact pads or connectors on the bottom of the logic board.

Of course, we're jumping past the most obvious: Insanely Great by Steven Levy.

Another comprehensive book that captures the spirit of being a serious Mac user in the mid-'90s is MacWeek's Upgrading and Repairing Your Mac.

I'll add my voice to those who had this problem with the TDK PSU and recapping C22 with a tantalum (I did not order the caps, but they look like Kemets). When following the silkscreen, I was getting -2.2V, but once I flipped C22 around (opposite of the silkscreen), I got a solid -5.1V. I...

What an amazing summary of something that has clearly taken a lot of your time. In my opinion, your final cost was reasonable given what is pre-populated on the board. I also appreciate you posting this here, where it can be found and helpful to others in the future. Videos are great for...

I ran a person instance of Mastodon for nearly a year, but I’m now at https://bitbang.social/@retroviator My schedule is pretty full, so I enjoy dipping in and seeing what people are up to through Mastodon. It helps me feel connected to others with the same goofy interests, and without the...