XP(4) - Device Drivers Manual (luna88k)
XP(4) - Device Drivers Manual (luna88k) # XP(4) - Device Drivers Manual (luna88k) NAME # xp - HD647180X I/O processor SYNOPSIS # xp0 at mainbus0 DESCRIPTION # The file /dev/xp is an mmap(2) capable interface to the memory area of the HD647180X I/O processor (so-called “XP”) on LUNA-88K and LUNA-88K2. Byte offsets in this file are interpreted as relative memory addresses of the I/O processor. The range should be between 0x0 and 0xffff. ...