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HP 9845C : ウィキペディア英語版
HP 9845C
PPU) 3-chip hybrid processor with BPC, IOC and EMC


Enhanced option 2xx:

1 x bit-slice processor (LPU)

1 x 16-bit hybrid (PPU)

@ 〔
| Memory = 64 - 1600 kB RAM ; 〔
| OS =
| graphics = 〔
| power = Mainframe: 〔
| price = 〔(【引用サイトリンク】url=http://www.hp9845.net/9845/hardware/9845c/ )
| weight = 〔
}}
The HP 9845C was one of the first desktop computers in 1980 equipped with color screen and light pen for design and illustration work. It was used to create the color war room graphics in the 1983 movie ''WarGames''.
==Features==

The attached HP 98770A color display enabled the color graphics with its own CPU and separate power supply, a vector generator based on the AMD2900 bit-slice architecture, graphics memory with three planes of each, the connection interface to the mainframe consists of a direct data bus attachment, and a light-pen logic.〔 were available.〔
The system is a big-endian 16-bit architecture with roots in the which were one of the first 16-bit microprocessors created.〔(【引用サイトリンク】url=http://www.hp9845.net/9845/hardware/architecture/ )
The display showed 8 soft keys on the lower end of the screen, 39 alignment controllers behind a door enabled fine tuning of color convergence.〔
The speed of the builtin BASIC language was accomplished by implementing time critical parts of it in CPU microcode.〔
A builtin tape cartridge device with a capacity of 217 kB and transfer speed of 1440 bytes/s enabled storage of data.〔
Average access time for the unit is 6s and a rewind end to end takes 20s. The directory is stored in r/w memory to enable quick access.〔(【引用サイトリンク】url=http://bitsavers.informatik.uni-stuttgart.de/pdf/hp/98xx/09845-90039_CEhbk_Apr84.pdf )

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「HP 9845C」の詳細全文を読む



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