Elfen said:

. . . so that explains how I was able to recently boot a 1400cs with a CF used as a hard drive on my 5300ce. I had my suspicions. Now to figure out why my 5300ce seems to be faster than my 1400cs of the same speed. I'm suspecting something as done with the bus speed.

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I'm guessing different memory configurations?

I don't have the original names for the 1400xx, 5300XX or DuoXXXx or 2300c, but here's the title to search for the 190 Devnote:

Apple_Macintosh_PowerBook_190_190cs_Developer_Note

But the 190 is still a great machine no matter what configuration you ended up with.

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Absolutely, it's also the only MoBo that fits into that particular Case with cubic available underneath that horrid excuse for a pointing device to allow for a Duo Trackball Upgrade. Gotta get around to finishing up the electronics side of that hack sometime!