Attached is a document I put together many years ago, which outlines how I successfully replaced R100 EEproms, back in the day.? I built a EProm programmer called "Pony Prog", I found described on the internet at that time.? Pony Prog? would program? the? ATMEL 24C02's.?? The programmer may still be documented somewhere on the internet.?? I haven't looked for it lately.? As I remember it wasn't terribly hard to build.

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I'm pretty sure I can find image files for the? "blank" TX & RX? EEproms,? if it would help.

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Don't know whether? the ATMEL 24C02's are still available??

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Memory is fuzzy, but, I think in some cases I could read the R100 and then swap out the EEProms for the new EEProms with the "blank" image burned and write the image back out with the Motorola RSS.???? In other cases I re-programmed the R100 from scratch as described in the document.

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Brett? N5SQK