ran this command:

sudo flashrom -w ~/Downloads/P4P81019.rom

and got this output:

flashrom v0.9.1-r706
No coreboot table found.
Found chipset "Intel ICH5/ICH5R", enabling flash write... OK.
This chipset supports the following protocols: Non-SPI.
Calibrating delay loop... OK.
Found chip "PMC Pm49FL004" (512 KB, LPC,FWH) at physical address 0xfff80000.
Flash image seems to be a legacy BIOS. Disabling checks.
Writing flash chip... Programming page: ERASE FAILED at 0x00004ec0! Expected=0xff, Read=0x24, failed byte count from 0x00000000-0x0000ffff: 0xb06d
ERASE FAILED!
ERASE FAILED!
FAILED!
Your flash chip is in an unknown state.
Get help on IRC at irc.freenode.net channel #flashrom or
mail flashrom@flashrom.org
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DO NOT REBOOT OR POWEROFF!