RESULTS OF TEST01 and TEST02:
Gitches were found in sequences on M2. Its proved that:
1. M2-ATX in dumb mode, does not recognize hard off if it is
invoked from windows shutdown dialog. It restarts the PC
3 seconds after a shutdown from windows and repeats that
as long as you keep turning off PC from windows dialog. This
is a bug. If the PC is shutdown and the PS is in dumb mode, it should
monitor the on/off pins and should not do anything unless a
switch is pressed by the user. In a car environment, this
could be an annoyance. You will have to play a game of time
to keep the PC shut, you will have to turn the main power
from car const 12v(13.8v) OFF in that 3 seconds so it does not
come back ON. The workaround is a 12v disconnect switch on main
const 12v line from battery. This is a hack and the M2-ATX should
not act like this.
2. Only hardoff by shortening the J9 for a few seconds will keep the
PC off instead of booting it again after shutdown on its own. Seems
it only recognizes that as a hard off. thats a BUG. Windows are
not supposed to be hard turned off like this. SO this feature does
not help and is not good for system.
3. The on/off wire is not the only source for a on off signal to
the mother board. The difference beween having the wire installed
or not is only When i turn the BSA on, the PC will start
automatically if i have the wire installed. other wise it wont. So
whats the problem? well see test 01 above, i have no wire installed
but the PC still starts again if i shutdown windows from windows
shutdown dialog. So there are two sources of on off, one from the wire,
and one from the supply through the ATX connector.
I think all of the above can be summed up into one bug.. The correct
behaviour can be achieved if the M2 ATX is in dumb mode, it only waits for
signal from J9 and nothing else, and after any kind of shutdown, It does not
do any "intelligent" work, cuz doh!.. its in dumb mode.
that would fix all 3 of the above.