Use the power-on LED on your machine as a load meter. The exact behavior is platform-dependent, but normally the flash frequency is a hyperbolic function of the 5-minute load average.
Say Y here to support the /proc/hardware file, which gives you access to information about the machine you're running on, including the model, CPU, MMU, clock speed, BogoMIPS rating, and memory size.
This option enables support for ARAnyM native features, such as access to a disk image as /dev/hda.
Say Y to include support for the ARAnyM NatFeat block device which allows direct access to the hard drives without using the hardware emulation.
Say Y to include support for the ARAnyM NatFeat console driver which allows the console output to be redirected to the stderr output of ARAnyM.
Say Y to include support for the ARAnyM NatFeat network device which will emulate a regular ethernet device while presenting an ethertap device to the host system.
Say Y to include support for the EtherNAT network adapter for the CT/60 extension port. To compile the actual ethernet driver, choose Y or M for the SMC91X option in the network device section; the module will be called smc91x.
Say Y to include support for the EtherNEC network adapter for the ROM port. The driver works by polling instead of interrupts, so it is quite slow. This driver also supports the ethernet part of the NetUSBee ROM port combined Ethernet/USB adapter. To compile the actual ethernet driver, choose Y or M in for the NE2000 option in the network device section; the module will be called ne.
If you want to be able to use the DSP56001 in Falcons, say Y. This driver is still experimental, and if you don't know what it is, or if you don't have this processor, just say N. To compile this driver as a module, choose M here.
If you want to use your Amiga's built-in serial port in Linux, answer Y. To compile this driver as a module, choose M here.
If you want to use the internal "DCA" serial ports on an HP300 machine, say Y here.
If you want to use the internal "APCI" serial ports on an HP400 machine, say Y here.
If you say Y here, it will be possible to use a serial port as the system console (the system console is the device which receives all kernel messages and warnings and which allows logins in single user mode). This could be useful if some terminal or printer is connected to that serial port. Even if you say Y here, the currently visible virtual console (/dev/tty0) will still be used as the system console by default, but you can alter that using a kernel command line option such as "console=ttyS1". (Try "man bootparam" or see the documentation of your boot loader about how to pass options to the kernel at boot time.) If you don't have a graphical console and you say Y here, the kernel will automatically use the first serial line, /dev/ttyS0, as system console. If unsure, say N.