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Opus Challenger3 (front)
Opus Challenger3 (right)
Opus Challenger3 (back)
Opus Challenger3 (open)
Opus Challenger3 (RAM disc)
The Opus Challenger 3 is a 5.25" floppy disc drive, a 256KB or 512KB RAM drive and a disc controller all in, what appears to be, a double floppy drive case. Unusually the Challenger 3 does not connect to the BBC's floppy drive port but connects to the 1MHz bus and includes a pass through socket so devices can be daisy chained. The Challenger 3 has a WD1770 disc controller. The board is labeled OPUS BBC 512 issue 2.
The pictures show:
A Hires picture of the Opus Challenger 3 ciruit board is available HERE
The Opus Disc Manual for the BBC Micro using Opus Peripherals is available HERE .
The Opus Challenger 3 ROM image v1.03 is available HERE .