In computing, the F8 was an 8-bit microprocessor created by Fairchild Semiconductor. Computing is usually defined like the activity of using and developing Computer technology Computer hardware and software. A microprocessor incorporates most or all of the functions of a Central processing unit (CPU on a single Integrated Present day Fairchild Semiconductor International Inc is a spin-off company resulting from reconstitution of assets in National Semiconductor The processor itself had no address bus — program and data memory access were contained in separate units, which reduced the number of pins and the associated cost. It also featured 64 registers, accessed by the ISAR register in cells (register windows) of eight, which meant external RAM wasn't always needed for small applications. In addition, the 2-chip processor didn't need support chips, unlike others which needed seven or more.
The use of the ISAR register allowed a subroutine to be entered without saving registers, speeding execution — the ISAR would just be changed. In Computer science, a subroutine ( function, method, procedure, or subprogram) is a portion of code within a larger Special purpose registers were stored in the second cell (regs 9-15), and the first eight registers were accessed directly. The windowing concept was useful, but only the register pointed to by the ISAR could be accessed — to access other registers, the ISAR was incremented or decremented through the window.
History
The F8 was released in a single-chip implementation (the Mostek 3870) in 1977. Mostek Podlaskie Voivodeship Mostek was an Integrated circuit manufacturer founded in 1969 by ex-employees of Texas Instruments. Also 1977 (album by Ash. Year 1977 ( MCMLXXVII) was a Common year starting on Saturday (link displays
The F8 was used in the Fairchild Channel F Video Entertainment System in 1976. The Fairchild Channel F is a game console released by Fairchild Semiconductor in August 1976 at the retail price of $169 Year 1976 ( MCMLXXVI) was a Leap year starting on Thursday (link will display full calendar of the Gregorian calendar.
The F8 was used in the VideoBrain Computer system in 1977
The F8 inspired other similar CPUs, such as the Intel 8048. The VideoBrain Family Computer (model 101 is an 8-bit Home computer manufactured by the VideoBrain Computer Company starting in 1977 Also 1977 (album by Ash. Year 1977 ( MCMLXXVII) was a Common year starting on Saturday (link displays The Intel 8048 Microcontroller (µC (MCS-48 Intel's first microcontroller was used in the Magnavox Odyssey² Video game console, the Roland Jupiter-4
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This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL. The Free On-line Dictionary of Computing ( FOLDOC) is an online searchable encyclopedic Dictionary of Computing subjects The GNU Free Documentation License ( GNU FDL or simply GFDL) is a Copyleft License for free documentation designed by the Free Software
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