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・ Mos Speedrun
・ MOS Technology
・ MOS Technology 6502
・ MOS Technology 6507
・ MOS Technology 6508
・ MOS Technology 6509
・ MOS Technology 6510
・ MOS Technology 6522
・ MOS Technology 6532
・ MOS Technology 6551
・ MOS Technology 65xx
・ MOS Technology 8502
・ MOS Technology 8563
・ MOS Technology 8568
・ MOS Technology Agnus
MOS Technology CIA
・ MOS Technology RRIOT
・ MOS Technology SID
・ MOS Technology SPI
・ MOS Technology TED
・ MOS Technology VIC
・ MOS Technology VIC-II
・ Mos Teutonicus
・ Mos, Spain
・ MOS-1 (satellite)
・ MOS-controlled thyristor
・ Mosa (footballer)
・ Mosa Conference
・ Mosa Gaolekwe
・ Mosa Kalantari


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MOS Technology CIA : ウィキペディア英語版
MOS Technology CIA

The 6526/8521 Complex Interface Adapter (CIA) was an integrated circuit made by MOS Technology. It served as an 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 and Commodore 128(D), each of which included two CIA chips. The Commodore 1570 and Commodore 1571 floppy disk drives contained one CIA each. The Amiga home computers employed two and Commodore 1581 floppy disk drive one 8520 chip, which is functionally equivalent to 6526/8521 except the simplified TOD circuitry.
==Parallel I/O==
The CIA had two 8-bit bidirectional parallel I/O ports. Each port had a corresponding Data Direction Register, which allowed each data line to be individually set to input or output mode. A read of these ports always returned the status of the individual lines, regardless of the data direction that had been set.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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