IBM BDM-610000049 - Manual (Page 88)

78 CMX158886 cpuModule BDM-610000049 Rev G
Table 59 Reset Status Description and Priorities
I/O Address
457h
Reset
Signal
Reset
Priority 1
1. When a reset is asserted, all resets with a higher reset priority will also be asserted. For example, if the standby
power reset is asserted, all other resets will also be asserted.
Description
D7 Main Power (+5V) 2 Main input power to cpuModule (+5V)
D6 CPU Core Power 3 CPU core powers supply
D5 Non-Standby Power 3 Power supplies that are not for standby
power
D4 Memory Power 3 Power to onboard memory banks
D3 Standby Power 1 Standby power supplies
D2 reserved - reserved
D1 PCI Reset 4 PCI bus reset signal
D0 Utility Reset - Utility connector push button reset 2
2. The BIOS allows the user to change the function of the utility connector’s push button reset. Even if the push
button is not configured as a reset, this bit will always read a 1(asserted) when the reset button has been
pushed.