03/03/2008 Initial Release, Firmware release 1.0
04/15/2008 Removed C23 (adjustment to the 5V rail rise time)
04/15/2008 Firmware 1.1 changed timing scheme as follows:
 
P0  STANDARD PSU  
P1 5sec / 1min            was 5sec 1 min
P2 5sec / NEVER    was  5sec / 1 hour
p3 1min / 1min             was  5 sec / NEVER 
p4 15 min / 1 min         was  30 sec / 1 hour
p5 15 min / NEVER   was 30sec / NEVER 
p6 30 min / 1 min          was  30min / NEVER
p7 2 h / 1 NEVER       was  3h / NEVER
 
04/14/2008 Firmware 1.1: 1minute Ignition latch was active only when M4-ATX was powered on for the first time
04/14/2008 Firmware 1.1: Further alignment in the way 12, 5, and 3.3V rails startup timing
04/14/2008 Firmware 1.1: Firmware version can be viewed via USB HID link.
04/14/2008 Firmware 1.1: UPSMode implemented
 
06/06/2008 Firmware 1.2: Introduced +750ms wait time between 5VSB on and ON/OFF pulse,value can be changed by user through USB
 
07/04/2008 Firmware 1.3: Thump OFF timeout starts when rails are started
07/04/2008 Firmware 1.3: Thump is active ON only during the rails are ON
07/04/2008 Firmware 1.3: In modes 1-7 if Ignition is still ON and PC was manually shut down (from OS) M4 won't go to Hardoff state instead it will go to 5V standby and wait for start pulse.