Pinari,
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I'm going back decades here, but this is what I remember:
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As others have pointed out, the R100 repeater is based on European mobiles that have much in common with (but are not identical to) the Motorola Maxtrac line.? Hardware is different for analog PL and digital PL, so check what you've got carefully.? As I recall they can be converted back and forth if you are strong technically.? Melted down PAs are fairly common on these, but as I recall, the PA from a UHF Maxtrac mobile fits just fine.
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They are programmed with a DOS program and a special cable, not the normal RIB.? Early versions of the programming software had to read a valid EEPROM before allowing reprogramming, but later software versions could start with a blank or corrupt EEPROM.? The software also has to be hacked to allow 440 ham band frequencies, but I've probably still got it around here - likely on a 3.5 inch floppy disk.? I'll see if I can find it and the schematic for the cable.? If I have it, I'll send you a PM.
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Good luck here - Kurt