/************************************************************************
*
* ramdev.c -- Skeleton device code.
*
* A sample 4 unit ramdisk that can be bound to an expansion slot device,
* or used without.  Works with the Fast File System.
* This code is required reading for device driver writers.  It contains
* information not found elsewhere.
*
* This example includes a task, though a task is not actually needed for
* a simple ram disk.  Unlike a single set of hardware registers that
* may need to be shared by multiple tasks, ram can be freely shared.
* This example does not show arbitration of hardware resources.
*
************************************************************************/

v51.1 changes (Fredrik Wikstrom):
 - is now an OS4 device
 - uses CreateTask()/DeleteTask() as opposed to setting up the Task structure (stack, etc.) manually
 - supports the NSCMD_DEVICEQUERY command (reports itself as a trackdisk type device)

Hopefully this will make it easier for people to write device drivers for OS4...

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 2190    5251  41.7% -lh5- 2e74 Jun 12 21:42 ramdev_files/dev_io.c
[generic]                 2853    8144  35.0% -lh5- 5dff Jun 20 17:36 ramdev_files/dev_io_cmd.c
[generic]                 1701    3774  45.1% -lh5- 5048 Jun 12 21:36 ramdev_files/dev_task.c
[generic]                 1204    2713  44.4% -lh5- 2865 Jun 12 21:27 ramdev_files/dev_unit.c
[generic]                 2295    6504  35.3% -lh5- 1371 Jun 20 14:18 ramdev_files/include/ramdev.h
[generic]                  491     944  52.0% -lh5- 3353 Jun 18 20:41 ramdev_files/Makefile
[generic]                  493     949  51.9% -lh5- 8559 Jun 16 11:08 ramdev_files/Makefile.gcc
[generic]                  547    1749  31.3% -lh5- 0922 Jun 20 16:47 ramdev_files/ramdev-mountlist
[generic]                 3754    9948  37.7% -lh5- adbd Jun 20 17:39 ramdev_files/ramdev.device
[generic]                  119     212  56.1% -lh5- ed09 Jun 16 10:17 ramdev_files/ramdev.device_rev.h
[generic]                  132     258  51.2% -lh5- ec51 Jun 16 10:17 ramdev_files/ramdev.device_rev.i
[generic]                    2       2 100.0% -lh0- 9795 Jun 16 10:17 ramdev_files/ramdev.device_rev.rev
[generic]                  135     271  49.8% -lh5- feb9 Jun 16 10:17 ramdev_files/ramdev.device_rev.s
[generic]                  960    2093  45.9% -lh5- 0ad6 Feb 20  2003 ramdev_files/releasenotes
[generic]                   71      77  92.2% -lh5- 310a Sep  3  1992 ramdev_files/script
[generic]                 5502   14277  38.5% -lh5- ea93 Jun 20 17:46 ramdev_files/init.c
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        16 files   22449   57166  39.3%            Jun 21 13:18