AMD manual 4. GeodeROM Flow - GX Processor/CS5535 Device, Memory Map, 32430C, Valid and

Memory Map 32430C

Reset

ROM

Fetch

Uses CPU ID instruction.		CPU ID		N
		Correct?
			Y
	N	CMOS/NVRAM
		Valid and
		Checksum
		Ok?
			Y

Halt

Y

Load CMOS/

NVRAM Defaults

Failed to

Boot

3 Times?

N

Early CS5535

Initialization

PLL Flag

Failed boots need a POR

reset and will always take this path.

indicates

Y

Jumper settings correspond to a table of SKUs for each

revision of the CPU. PLL settings can be set

manually for debug.

2nd Pass?

N

Get Core and GLIU Settings from Jumper Settings or CMOS

CPU Speed to get

PCI Clock

DRAM Clock Setting

from SPD

Continue POST

PLL Reset completed

Set All Clocks

GLCP_SYS_RSTPPL

(MSR Addr. 4C00014h)

Set PLL Flag

Internal PLL Reset

Figure 7-4. GeodeROM Flow - GX Processor/CS5535 Device

AMD Geode™ GX Processor/CS5535 Companion Device GeodeROM Porting Guide 33