atop is a "top" for the Amiga Shell: a live system monitor with five
panels: CPU load, CHIP/FAST memory, volumes, network throughput and
the task list, drawn in the console's own window.

  * CPU and network are braille-style plots; memory and volumes are
    square meters coloured green/amber/red by usage.
  * The task list shows each task's command name; it can be sorted
    (priority, type, state, name), filtered by name with '/', and a
    selected task can be sent CTRL-C/D/E/F, with a confirm before ^C.
  * The sample period is adjustable from 100 ms to 30 s and is
    remembered between runs.
  * Full mouse support under ViNCEd (click headers to sort, rows to
    select, the buttons to signal); every action also has a key, so a
    plain CON: or KingCON works fine on the keyboard.
  * Run it from a Shell (it takes over that window) or double-click
    the icon (it opens its own window and closes it when you quit).
    Icon tooltypes LEFT/TOP/WIDTH/HEIGHT size that window.

It reads only public system state, Exec task lists, AvailMem, the
DosList, VERTB timing and the network interface counters and patches
or hooks nothing.

Requirements

  * AmigaOS 3.0 or newer. Tested on 3.1, 3.2.3, and 3.9
  * A 68020 or better.
  * ViNCEd is recommended (it is the densest console and the only one
    that provides the mouse), but any console works on the keyboard.
  * For the network panel: Roadshow (used automatically), or any other
    stack via a named SANA-II device - see the docs.

It does NOT run on an AROS console (e.g. ApolloOS); it detects that and
exits with a message rather than misbehave.

See atop.doc for keys, the mouse map, the network device setting and
the full details.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
drwxr-xr-x  1000/1000        0       0 ****** -lhd- 0000 Sep 12 09:12 atop/
-rw-r--r--  1000/1000      834    1941  43.0% -lh5- bfbf Sep 12 09:12 atop/Install
-rwxr-xr-x  1000/1000     1764    2215  79.6% -lh5- bd5d Sep 12 09:12 atop/Install.info
-rwxr-xr-x  1000/1000    20652   34936  59.1% -lh5- 93a0 Sep 12 09:12 atop/atop
-rw-r--r--  1000/1000     3611    7753  46.6% -lh5- 27f7 Sep 12 09:12 atop/atop.doc
-rw-r--r--  1000/1000      563    1401  40.2% -lh5- 36bc Sep 12 09:12 atop/atop.doc.info
-rw-r--r--  1000/1000      208    1022  20.4% -lh5- e0a6 Sep 12 09:12 atop/atop.info
-rw-r--r--  1000/1000     1083    1940  55.8% -lh5- c697 Sep 12 09:12 atop/atop.readme
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         8 files   28715   51208  56.1%            Sep 13 00:10