4-20 Using Your NEC Versa
PCM Plus Drivers (Cont’d)
DRIVER
PURPOSE
PCMMTD.EXE
Supports the Microsoft Flash File
System (FFS) protocol. Used with
SRAM and Flash memory cards.
PCMRMAN.SYS
Initializes the Card Services resource
database.
PCMSCD.EXE
Used with Fax/Modem and LAN cards.
PCMSS.EXE
Supports Socket Services. Works at the
BIOS level as an interface between the
PCMCIA card socket and the Card
Services program.
PC Card Enablers
Some PC cards have custom software written by the card
manufacturer, known as Enablers, instead of Card and
Socket Services. This custom software works well if only
one or two PC cards are used on a particular system.
Although many of these were considered compliant with
PCMCIA Release 2.0 specifications, they did not provide a
truly compatible environment for exchanging and sharing
PCMCIA operations. The following are some guidelines for
using PC cards with Enablers.
Do not use more than one Enabler at once unless you
know what system resources are used by each Enabler.
One Enabler may crash another if there is a conflict.
Hot swap may not work with some Enablers.
An Enabler may only work in Windows Standard Mode.
Enablers have minimal memory requirements. For ex-
ample, they require as little as 4 KB for a modem, 16
KB for Ethernet, and 24 KB for Token Ring.