Beomaster 4500 two-way ROMs

[lausvi]

Hi.

For years I’ve been on look-out for the upgrade ROMs for the Beomaster 4500 to upgrade it to two-way comms. I finally grabbed a NOS set that I found on eBay (not cheap but wanted to get this over with) and I uploaded the BIN files of both 1.6 and 2.2 ROMs to archive.org. Please help sharing these ROM dumps before the old EPROMs eventually fail. I hope this helps somebody else to upgrade or repair their Beomasters.

I can now get two-way IR on a BL7000. I tried MCP6500 too but that didn’t work.

Anyone know if all BM4500’s actually shipped with the two-way IR hardware or were there one-way models too?

My BM4500 now has the new ROMs, new battery, transformer wiring switched from 220V to 240V. And new adhesive on the touch-panel (although it’s still not perfect, and some previous owner had chipped the black paint on several places but I was able to mask most of it). The tuner feels somewhat low-sensitive though.

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Location: Helsinki - Finland
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