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Issue 22 : May 1984

6502 second processor article

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New Dimension in Time and Space? - Clive Williamson

AT LAST the 6502 second processor is here to relieve us of the major drawback of the BBC micro - its lack of memory space when high resolution grpahics are used (ie, modes 0,1 and 2). This problem is compounded when a filing system such as disc, Telesoftware or Econet is fitted, because each claims more space from the Beeb's memory map. The addition of a second processor immediately solves the problem because, once connected to the Beeb via the Tube interface, Basic programs are passed over, leaving the main machine to act as an input/output processor, handling all the operating system functions, output to peripherals and the screen display, and any necessary inputs from the keyboard, joysticks and so on.
To discover more and see the full article visit chriswhy.co.uk



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