Bitfields for Compaq SLT/286 modem configuration information:
Bit(s)	Description	)
 0	powerup state (0 off, 1 on)
 1	modem installed
 2	IRQ line assignment (0 IRQ 4, 1 IRQ 3)
 3	COM port assignment (0 = COM 2, 1 = COM 1)
 4	modem state (0 not assigned, 1 assigned)
 5	modem is on