If PCMCIA support was not selected when OS/2 was installed, add it by using the Selective Install facility in the System Setup folder. Full PCMCIA support is built into OS/2 Warp 3.0 and later. On OS/2 2.1 and 2.11, PCMCIA Card Services is built in, but you must add Socket Services separately.

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Quatech MPAP-100 user manual