Recent content by kefkafloyd

Of note, there's another way to identify boards: their serial schemas. I've noticed two different schemas for 520s: EZxxxxxxDY7 and DWxxxxxxDY7. The DW boards are the later ones (the serial labels say Rev D). I think the difference is that the EZ boards were made in Singapore while the DW ones...

I believe on these machines the Gestalt is determined from some combination of CPU speed and sense pin detection on the machine's logic board connector. The ROMs are identical between LC 520, LC 550, and Color Classic II and they all use the same System Enabler 403. My LC 550 board inside the...

I can also confirm that R80 is missing on my Rev A LC550 logic board for another data point. No idea if R80 is populated on a Rev B board. Re: LC550/CC II, the LC550 and CC II logic boards are the same logic board. There's no separate part; they're one and the same. All CC IIs had 512K VRAM on...

Thanks for that video! The slight syncing differences between the CC and 520 boards (66.6 for the CC vs 66.7 for the LC 520/575) make sense due to the color classic's LC/LC II-based video. Those systems (and the CC and Mac TV which are derived from them) are specified to run at 66.62 Hz versus...

I believe it should look similar to the LC 575 board with IIe card in terms of borders/geometry, but I'm curious about the refresh rate. It should be observable if it's running at 60Hz or 67Hz if using a camera set to 67Hz.

@JDW, That's interesting. I assumed that a CC stock board to behave the same as a Mac TV/520/550/575 board in terms of standard Mac video timing (and thus geometry) at 640x480 67Hz. But now you've got me thinking. First, some basics: The CC (and Mac TV)'s video comes from the Spice and Tinker...