NEC PC-9801 extension board slot
pcex0 at cbus0
The file /dev/pcexmem
capable interface to the
memory area of the installed board at "NEC PC-9801 extension board
slot" on LUNA-88K2. Byte offsets in this file are interpreted as relative
memory addresses of the installed board. The range should be between 0x0 and
The I/O port area of the installed board is accessed via the file
in the same manner as
. The range should be between
0x0 and 0xffff.
The following ioctl(2)
in order to handle interrupts
of this extension slot. Currently 7 levels of interrupt (0 to 6) are
- Register the specified interrupt level with this driver to handle.
- Unregister the specified interrupt level with this driver.
- Wait for the interrupt with the specified level.
- PCEXWAITINT timeouts (currently 1 second).
files first appeared in