which chip do i take out

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ok so i am preparing to socket my ecu and rechip it, just a stock 89 ka24e ecu. ok common sense tells me that its the chip with the white tag and i even found a replacement already if in fact that is the correct one. the white tag reads g280afm5 and the chip itself reads hn27c256gj-20. i have not been able to find much info, jwt has a monopaly on the subject and the search on this site hasnt brought much up. haha i feel like a dumas but i was hoping someone on here has rechipped one of these ecu's before .. thanks

[Chezedik]

try http://www.eccs.hybridka.com

[shockload]

just what i was searching fro