For your information, I am using two SanDisk devices:
One is the 6-in-1 PC Card Adapter (until now only tested with a 16 MB SmartMedia card), which works fine in a PB 190cs and a PB 5300c. A minimal System 7.5.3 on the SmartMedia card will even boot both these computers (Command + Option + Shift + Delete to bypass the system on the internal hard disk).
The other one is a CompactFlash PC Card Adapter, which functions equally well in the aforementioned PowerBooks. The CF card, too, can be used as a startup disk. A CompactFlash card in the CF adapter is even recognised by an old Model M2864 V1/B PowerBook PCMCIA Expansion Module in a PB 540, albeit not as a bootable disk. Said expansion module had difficulties with the SmartMedia card in the 6-in-1 adapter, though. Things may be a bit different with another memory card, or with a M2864 V1/C expansion cage (I have access to that module as well, but have not carried out the tests).
Jan
