ISBN: | 978-5-5119-1600-2 |
High Quality Content by WIKIPEDIA articles! The 6526/8520 Complex Interface Adapter (CIA) was an integrated circuit made by MOS Technology. It served as a I/O port controller for the 6502 family of microprocessors, providing for parallel and serial I/O capabilities as well as timers and a Time-of-Day (TOD) clock. The device`s most prominent use was in the Commodore 64, Commodore 128(D), and Amiga home computers, each of which included two CIA chips. The Commodore 1570, Commodore 1571 and Commodore 1581 floppy disk drives contained one CIA each.