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Acorn 6502 2nd processor (front & top)
Acorn 6502 2nd processor (right side)
Acorn 6502 2nd processor (back)
Acorn 6502 2nd processor (bottom)
Acorn 6502 2nd processor with top cover removed
Acorn 6502 2nd processor circuit board (top)
Acorn 6502 2nd processor circuit board bottom
This is my 6502 2nd processor which was one of the first upgrades I bought for my BBC B. I have always believed that you can never have too much memory or too fast a CPU, so the BBC B's limited memory and slower CPU were just waiting for an upgrade. Acorn produced a special version of BASIC (Hi-BASIC) and View (Hi-View) to maximise the amount of memory abailable, Computer Concepts also produced a special version of Wordwise (Hi-Wordwise) on disc.
Here is the brochure describing the 6502 2nd processor.
The pictures show:
A Hires copy of the 6502 2nd processor circuit board is HERE .
A copy of the 6502 second processor User Guide is available in documents HERE.
A copy of the 6502 second processor Service Manual is available HERE
In May 1984 Acorn User published a review titled 'New dimension in time and space '.