IBM PC 300GL manual Network connection, Real-time clock and CMOS, Flash EEPROM, Expansion adapters

Network connection

Some PC 300 GL and PC 300 PL models are equipped with an Ethernet or token-ring adapter that supports the Wake on LAN feature.

Features of the optional Wake on LAN Ethernet adapter are:

•Operates in shared 10BASE-T or 100BASE-TX environment

•Transmits and receives data at 10 Mbps or 100 Mbps

•Has an RJ-45 connector for LAN attachment

•Operates on symmetrical multiprocessing (SMP) environments

•Supports Wake on LAN

•Supports Remote Program Load (RPL) and Dynamic Host Configuration Protocol (DHCP)

Features of the optional token-ring adapter are:

•Transmits and receives data at 4 Mbps or 16 Mbps

•Has RJ-45 and D-shell connectors for LAN attachment

•Supports Wake on LAN

•Supports Remote Program Load (RPL) and Dynamic Host Configuration Protocol (DHCP)

The PC 300GL personal computer has a 3-pin header on the system board that provides the AUX5 (auxiliary 5 volts) and wake-up signal connections.

Real-time clock and CMOS

The real-time clock is low-power and provides a time-of-day clock and a calendar. An external battery source of 3 V dc maintains the settings.

The system uses 242 bytes of complementary metal-oxide semiconductor (CMOS) memory to store data. To erase or reset CMOS memory to the default, use the small rocker switch on the system board.

Note: Refer to the instructions in the PC 300PL and PC 300GL User Guide before attempting to reset CMOS.

To locate the battery and the rocker switches, see “Physical layout” on page 14.

Flash EEPROM

The system board uses two megabits (Mb) of flash electrically erasable programmable, read-only memory (EEPROM) to store the basic input/output system (BIOS), IBM logo, Configuration/Setup Utility, and Plug and Play data.

If necessary, you can update the EEPROM by downloading a stand-alone utility program available from the IBM Web site: http://www.ibm.com/pc.

Expansion adapters

Each PCI-expansion connector is a 32-bit slot. PCI-expansion connectors support the 32-bit, 5 V dc, local-bus signalling environment defined in PCI Local Bus Specification 2.2.

PC 300GL personal computer types 6563, 6564, and 6574 and PC 300PL personal computer type 6565 personal computers have three PCI slots to support the addition of adapters. For information on installing adapters, see the PC 300GL and PC 300PL User Guide.

Chapter 2. System board features 13