The 3C503 adapter uses the BNC or RJ-45 port (the non-AUI connector) as the default if it cannot detect a device connected to the AUI connector.
I/O Address |
IRQ |
---|---|
0x250-0x2E0 |
3 |
0x300-0x350 |
2 |
The IRQ used by the 3C503 or 3C503-16 board depends on the I/O address set using the jumpers. For example, if you configure the 3C503 or 3C503-16 at I/O address 0x250, no other devices in your system should use IRQ 3.
The 3C503 board has a limited amount of on-board memory, which causes very poor NFS software performance. To avoid this problem, use a 4-Kbyte read and write buffer size to mount the NFS software over the 3C503 interface (see the mount_nfs(1M) man page).