doesn't support 2Mbit rom?

[bendany]

I am testing another mainboard with linuxbios. base on 440bx chipset.
onboard 82558 netcard, ati rage 128 videocard and ess 1938 soundcard.
the eprom is MX29F004, 4Mbit.

I use the config of digitallogic/smartcore-p3.use the etherboot 5.06
payload.
I build a 1M romimage. burn it into Atmel 29c010a. linuxbios can succeed
load
the etherboot payload. but the etherboot failed detecting the onboard
netcard.

so I try ADLO, and I replace the etherboot payload with
ADLO. build a 2Mbit romimage. burn it into SST 29EE020. but the elfboot
cannot
find the ELF image of ADLO.

---------output message----------------
done.
Copying IRQ routing tables to 0xf0000...done.
Verifing priq routing tables copy at 0xf0000...failed
Wrote linuxbios table at: 00000500 - 00000680  checksum fe7c

Welcome to elfboot, the open sourced starter.
January 2002, Eric Biederman.
Version 1.2

    37:init_bytes() - zkernel_start:0xfffc0000  zkernel_mask:0x0000007f
Cannot Load ELF Image
-----------------------------------------

----------my config file ----------------
target 440bx
mainboard digitallogic/smartcore-p3

option SERIAL_CONSOLE=1
option DEFAULT_CONSOLE_LOGLEVEL=8
option MAXIMUM_CONSOLE_LOGLEVEL=8
option DEBUG=1
option USE_GENERIC_ROM=1

option ROM_SIZE=262144
option PAYLOAD_SIZE=196608

option USE_ELF_BOOT=1
#payload ../eepro100.ebi
payload ../payload.adlo

nooption RAMTEST
--------------------------------

I have no idea how to deal with.
any tips?

BTW: if I use polled IDE patch + ADLO. videocard can init correctly.

Regards.