Interesting point about the production dates, that explains a lot in retrospect. It's no wonder Apple never offered an Active Matrix LCD option for the 190, it was the low end offering.

EveryMac has some interesting info:

http://www.everymac.com/systems/apple/powerbook/specs/mac_powerbook190_66.html What's a 7.1

http://www.everymac.com/systems/apple/powermac/specs/powermac_5300_100lc.html

Quadra 630 would be another 68k Machine that requires an OS newer than 7.1 (if you were saying vanilla 7.1, NJR.)

http://www.everymac.com/systems/apple/mac_quadra/specs/mac_quadra_630.html

____LEM lists 7.1 as the lowest required OS for the 630, everymac says 7.1.2P

http://lowendmac.com/quadra/quadra-630.html

What the heck is a 7.1.2P anyway . . .

https://www.google.com/#psj=1&q=%22system+7.1.2p%22

. . . and why does Wikipedia list it as required for the P410? Gotta check the ROM levels

Wikipedia makes distinctions between P and (Pro) versions of 7.1

http://en.wikipedia.org/wiki/System_7

Interesting hit on 7.1.2P right here at the MLA

http://68kmla.org/forums/archive/topic.asp.TOPIC_ID=6341.html

I'm wondering if 7.1.2P is a patched, machine specific, backwards compatible OS like 6.0.8L was for the PB100

Interestingly enough, 7.1.2P appears to work on the Performa 410(?) a 68030 Mac(?) as well according to that OS chart on Wikipedia.

____What the heck is a Performa 410 anyway?

http://support.apple.com/kb/SP224'>http://support.apple.com/kb/SP224

____and a what the heck is System 7.1P3?

http://support.apple.com/kb/SP224

I'm confuzzled, but what's new? ;D

Given support for the Q630 and the P410 it would be interesting to see if 7.1.2P will load on the PB190

I'm guessing it's a patched system supporting IDE and the 68030 . . . }