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MOS Technology 6509



         


The MOS Technology 6509 was an enhanced version of the popular 6502 microprocessor, capable of addressing up to 1 megabyte of RAM via bank switching. While numerous computers based on the 6502 series did bank switching, they did this via separate logic. The 6509 had this logic on board.

The 6509 had a reputation for being difficult to program, due to its bank switching scheme, and never fared well. It was used in the ill-fated Commodore CBM-II line of computers.

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List of 65xx(x)-based products from MOS Technology and the Western Design Center

Microcomputers & microprocessors: MOS/CBM KIM-1 | 6501 | 6502 | 6507 | 6508 | 6509 | 6510/7501/8510 | 8500 | 8502 | W65C02 | W65816 | 6520 PIA | 6522 VIA | 6526 CIA | 6529 SPIA | 6530 Mem, I/O, Tmr | 6551 ACIA | 6560 VIC | 6567 VIC-II | 6581 SID | 6845 | 8563 VDC






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