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I've just bought for £7 a complete Sharp PC-1251 with its CE125 base unit with micro cassette and printer - it was all wrapped up since 1983. I have to say in all my 35+ years in IT I'd never seen Basic Programs stored as a .wav file. When you play them you get the shrill sound reminiscent of 80s Spectrum and Modems. When played it imports the actual basic program! I've also got a vintage Commodore PR 100 programmable calculator which just needed a new rechargeable battery, I replaced the internal battery with a new pack normally used in a Tomy baby alarm. What I can't find is a printed manual for the PR 100 or more importantly a DC ADAPTOR - the original one for Europe was model number 708, which again I can't track down. It was a 6v DC output via a female Jack - does anyone know if there is a modern replacement psu please.