The Wayback Machine - https://web.archive.org/web/20120204045426/http://www.os9forever.com/Compatibility.html

Compatibility matrix as of version 1.0.1.

Hardware/Software
Compatible?
Notes
Sonnet 2.0.x
Yes

Please do not bug Sonnet with support questions about 9.2.x!

Powerlogix 1.5
Yes
 
XLR8 2.6.1
Yes
Newertech 2.0.5
Yes
 
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Powermac 9600
Yes
Powermac 9500
Yes
Powermac 8600
Yes
Powermac 8500
Yes
Powermac 7600
Yes
Powermac 7500
Yes
Powermac 7300
Yes
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Powermac 7200
Yes/No
Sonnet's G3/G4 7200 upgrades cards do not work with 9.2.x. Hopefully sometime in the future they will add 'unsupported' support to their Crescendo/7200 drivers.
Powermac 6500
Yes
Powermac 6400
Yes
Powermac 5500
Yes
 
Powermac 5400
Yes
 
Powermac 4400
No
 
Twentieth Anniv.
Yes
 
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Powermac 8100
No
 
Powermac 7100
No
Powermac 6100
No
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Performa 6360
Yes
A user reported that it worked with a G3 upgrade and 9.1 Base set of extensions. YMMV.
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Powerbook 5300
No
Powerbook 1400
Yes
9.2.1 must be installed on a seperate machine with nubus support enabled under the advanced options, and then copied over to your 1400. The 9.2.2 installer is not effected. Must use Apple Menu Options control panel from 9.1 to avoid crash during startup. Apple System profiler will not work on nubus machines.
Powerbook 2400
Yes
Download this archive and install the 'Apple Sound Manager' extension to restore your sound
Powerbook 3400
Yes
Download this archive and install the 'Apple Sound Manager' extension to restore your sound. Install the 'Powerbook 3400/G3 Modem' extension if the 9.2.x installer overwrote it.
Powerbook G3 (aka 3500/Kanga)
Yes
Download this archive and install the 'Apple Sound Manager' extension to restore your sound. Install the 'Powerbook 3400/G3 Modem' extension if the 9.2.x installer overwrote it.
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Umax J700
Yes
Umax S900
Yes
Umax C500
Yes
 
Starmax 3000
No
 
Starmax 4000
No
Starmax 5000
No
Power Tower Pro
Yes
Power Center Pro
Yes
180, 210 confirmed
Power Base
Yes
180 only confirmed
Power Curve (mach ID = 108)
Yes
120 only confirmed