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A problem install Redboot in ROM on iPaq H3630


Dear Sir,

When I  install Redboot in ROM on iPaq H3630, can't initialize the FLASH,
and can't program Redboot into FLASH ROM.
The error message as following:
-----------------------------------------------------------------------
RedBoot> lo -r -b 0x100000 -m xmodem
CCRaw file loaded 0x00100000-0x00128a80
RedBoot> - CRC mode, 1302(SOH)/0(STX)/0(CAN) packets, 4 retries
RedBoot>
RedBoot>
RedBoot> fi loc -f 0x50000000 -l 0x40000
... Lock from 0x50000000-0x50040000: .
RedBoot> fi init
About to initialize [format] FLASH image system - are you sure (y/n)? y
*** Initialize FLASH Image System
    Warning: device contents not erased, some blocks may not be usable
... Unlock from 0x50fc0000-0x51000000: .
... Erase from 0x50fc0000-0x51000000: .
... Program from 0x01fb0000-0x01fb0400 at 0x50fc0000: .
... Lock from 0x50fc0000-0x51000000: .
RedBoot> fi unl -f 0x50040000 -l 0x40000
... Unlock from 0x50040000-0x50080000: .
RedBoot> fi cr RedBoot -b 0x100000
An image named 'RedBoot' exists - are you sure (y/n)? y
* CAUTION * about to program 'RedBoot'
            at 0x50000000..0x5003ffff from 0x00100000 - are you sure (y/n)?
y
... Erase from 0x50000000-0x50040000: Err = a200a2

Can't erase region at 0x50000000: 0x2(Error trying to erase)
... Unlock from 0x50fc0000-0x51000000: .
... Erase from 0x50fc0000-0x51000000: .
... Program from 0x01fb0000-0x01ff0000 at 0x50fc0000: .
... Lock from 0x50fc0000-0x51000000: .
RedBoot> fi loc -f 0x50040000 -l 0x40000
... Lock from 0x50040000-0x50080000: .
RedBoot> reboot
** Error: Illegal command: "reboot"
RedBoot>




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