IBM 09-0572-000 Manuale Utente

Pagina di 101
4-4
C
HAPTER
 4: S
TANDARD
 I
NSTALLATION
 
AND
 C
ONFIGURATION
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.” 
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