> Just recently someone created an device with major number 1 and minor
> number 0. It was called ram but that's exactly what /dev/mem is supposed
^^^ ^^^^^^^^
> to do: read the physical ram mapping.
I guess you mixed the things a bit ;-)
MAJOR 1, MINOR 0 /dev/ram0 == block device, == ramdisk
^^^^^ ^^^^
MAJOR 1, MINOR 1 /dev/mem == character device, == memory device
^^^^^^^^^
> The virtual address space should be
> accessed by /dev/kmem (see man 2 kmem or man 2 mem for confirmance.)
... better see linux/Documentation/devices.txt:
1 char Memory devices
1 = /dev/mem Physical memory access
2 = /dev/kmem Kernel virtual memory access
( this always is the actual source for device assignments )
Hans
<lermen@fgan.de>