Recent content by David Cook

Agree completely.

That is an interesting premise. I've seen capacitors go two ways: juicy or dried out. I assume this has to do with the climate they are stored in. I wonder if all alkaline batteries eventually burst catastrophically, or whether a subset of the batteries pass a certain point (outgassing?) where...

Wonderful. Thanks for the update.

Pretty awesome!

Very cool. How were you able to trigger it and generate that screenshot?

Digging around in the ROM and source code, Apple originally planned to include removable disk cards on the Macintosh Portable. This would have predated PCMCIA cards. In the source file, EDiskDriver.a, Gary Davidian ("GGD") appears to have begun work on EDisks around June of 1988. He first...

Very interesting. I'm glad you're keeping us up to date. I'm not surprised it has been difficult. I'm skeptical of LLMs for programming, for the same reasons other people have already mentioned in this thread. But, as a new way of searching and presenting findings, LLMs are wonderful. So...

@cheesestraws was quicker to the draw.

I think the 'More information' tab (lower right of your screenshot) explains that it is redirecting this call from pclk.

Congratulations!!!

Check D3. If the diode is failing, then battery B2 will drain through the entire +5V circuit. I don't know enough about UB6 to know if it has two modes. Low-power mode would just keep the clock running during sleep. High-power mode would run at full speed to allow clock/PRAM read/writes. My...

B2, I presume?

Wow. I assumed there would be some flags or a driver call that would ask "Hey, can you run in 4.3 mode". Ok. That's the heart of my line of questioning. If the OS is really waiting, then a faster bus will make more of a difference to the user's perception, as the bus response time is a...

Very interesting! How much does the maximum throughput affect user perception? That is, how much does it shave off of boot time or launching an application? I don't know enough about SCSI, but can you make a call asynchronously to one drive, and then to another drive, and when the results are...

Thank you @frontein1