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4-4 CHAPTER 4: STANDARD INSTALLATION AND CONFIGURATION
8 When prompted, select the operating mode and speed.
The 3C619C adapter offers the following choices:
■ 3Com mode, 16 Mbps
■ 3Com mode, 4 Mbps
■ IBM mode, 16 Mbps
■ IBM mode, 4 Mbps
3Com mode provides you with the features of IBM mode as
well as additional I/O address options and IRQ channels that
reduce the possibility of conflicts with other peripherals on the
PC. IBM mode is compatible with existing IBM drivers. Table 4-1
shows the characteristics of 3Com mode and IBM mode.
When you select the configuration mode, the I/O Base Address,
Interrupt Request Level, Ring Speed, BIOS/MMIO Base Address,
and Shared RAM Address Range options on the adapter are
automatically configured to settings that do not conflict with
any other device in your PC. Upon successful completion of
configuration, a message appears. Press any key to continue.
To change the settings manually, follow the steps in the next
section, “Changing Software Option Settings.”
To install the network driver, proceed to Chapter 5, “Installing
Network Drivers,” or Chapter 6, “Installing the Network Driver
for Windows.”
Table 4-1 3Com Mode versus IBM Mode
IBM Mode 3Com Mode
Supports existing IBM 16/4 drivers Requires 3Com drivers for expanded
configuration settings. Supports
existing IBM 16/4 drivers when the
I/O Base Address = A20 or A24 and
the IRQ = 2,3,6, or 7.
Maximum of 2 adapters Maximum of 6 adapters
4 IRQ levels 8 IRQ levels
2 I/O Base addresses (A20h, A24h) 32 I/O Base addresses