The P3105 / NMS9100 computer does not have a BIOS setup program.
Because it is an XT, the 'setup' is done by way of switches on
the motherboard. SW1 is located on the far left side of the
board, under the slots for the extension cards. The settings are:

1 on=8087 coprocessor not installed
  off=8087 coprocessor installed
2 on=one diskette drive installed    \ setting of drive type is not
  off=two diskette drives installed  / needed, bios will determine
3 mem size
4 mem size
5 on=parallel port disabled
  off=parallel port enabled as lpt1
6 reserved
7 on=serial port disabled
  off=serial port enabled as com1
8 on=fixed disk port disabled
  off=fixed disk port enabled at 320-323 hex
  The p3105 uses a XT-IDE type hard disk at this port. It can also
  use regular mfm hard disks with a controller card in one of the
  slots. When you do this, sw8 should be ON.

mem size:
sw4 sw3
on  on  none
on  off 256k
off on  512k
off off 640k

The p3105 claims to have 768k memory on startup. The extrea 128k is
indeed availabe, but it resides in the high memory area, above the
video memory.
