HD502HJ - how to write ROM via terminal

[drmilos]

I have HD502HJ with the same problem as described in this post

viewtopic.php?f=33&t=7812&start=0

i.e. drive does not spin and stays busy with client PCB and donor PCB with client ROM. I have gained terminal access as per instruction manual. ROM dump is

Dump size............................... : 524288 bytes
Firmware checksum....................... : Ok
FIPS offset............................. : 0x00070000
FIPS size............................... : 1024 bytes
FIPS checksum........................... : Error
Firmware type........................... : Main Code
Original name........................... : 1AJc3suM.125
Platform Id............................. : 0x19
Head map................................ : 0, 1, 2, 3

I understand this is a FIPS error.

I have copied FIPS section from the donor to client ROM.bin file using HexEdit. When I check this Repaired_rom.bin file in utility everything looks fine like this

Information about dump
Dump size............................... : 524288 bytes
Firmware checksum....................... : Ok
FIPS offset............................. : 0x00070000
FIPS size............................... : 1024 bytes
FIPS checksum........................... : Ok
Firmware type........................... : Main Code
Original name........................... : 1AJc3suM.125
Platform Id............................. : 0x19
Head map................................ : 0, 1, 2, 3
Test completed

I am now trying to write this Repaired_ROM.bin file to the ROM via utility terminal. The utility copies 256kb only (ROM is 512kb) and stops with error:

Write ROM
From file............................... : E:\List\13377-Repaired_rom.bin
Download via terminal................... : Yes
Disable checking HDD Patform Id......... : No
Checksum verification................... : Ok
Loader checking......................... : Ok
Loading................................. : Error downloading file via terminal; Terminal is busy
Operation aborted
Test completed

I understand that the easiest solution is to use external EPROM programmer (as the guy in the earlier post did), which I don't have and this job is rather urgent.

How can I write ROM via terminal - am I doing something wrong here?

[AJ2008]

If you have problems writing ROM and no access to programmer, you can try to write donor overlays to patient after hotswap, then proceed to try data access via donor PCB & ROM?

[drmilos]

Thank you AJ2008, I'm sure this solution will work, unfortunately I don't have donor drive, only replacement PCB. It's cheaper and probably as quick to get the programmer than a donor drive so I have ordered the programmer (I'm sure it will come handy many times in the future). Will post the result once I get the programmer.

[drmilos]

I obtained a programmer and uploaded repaired ROM image as per my original post. Drive now fully functional, cloned 100%, data intact. Problem solved, thank you for your help.