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I'm trying to remember if the 6200 could boot from a floppy, and unfortunately my retro Mac stuff, including 6300, isn't setup right now. But I want to say that those models could floppy boot. I would try that to see if there's a problem with the CF card (Mac OS install, card itself, or...

I don't know if the 68K instruction set had a special "burst mode" like the 603e. But that wouldn't be necessary. I don't believe the CPU has to do anything special. On a IIci or IIvx if it reads 4 bytes at address 0, then starts a read at address 4, the memory controller knows it has that row...

The IIci and IIvx used Fast Page Mode (FPM) RAM. This means the initial time to access a random location was 80ns, but the subsequent 3 reads from the same row were much faster. Fast enough to reveal the difference in the bus speed. There's also all the other traffic on the board to consider...

Thank you! I actually joined a while back but only occasionally lurked. This thread caught my attention and wasn't so old that it felt weird to reply. I wish I had time to play with classic Macs and make more blog posts. Some fond memories of that era.

I definitely judge these machines on how they performed at the time for their price. It's not really fair to judge them based on how they compared with newer machines at a time when Moore's Law was in full swing. I agree with you that they run best with 7.6.1. or 8.1. I wouldn't say the early...

I nearly grabbed a 6200 on Craigslist one time because I very much wanted to test it against the 6300 and the 6100/66 on PPC and 68K code. Lost the chance and haven't seen one locally again. TBH I'm very curious about how the 6200 did perform in general (since most of Mac OS at the time was...

The access timing of RAM is a distinct issue from the speed of the bus that it's on. You'll find many examples...especially among early Macs...of the same speed RAM (cache or main memory) being used across computers with different bus speeds. It's possible that the developer note is incorrect...