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The PC-8801's direct successor, the PC-8801mkII, came with a JIS level 1 kanji font ROM, a smaller case and keyboard, and, in the models 20 and 30, one or two internal 5 1 ⁄ 4-inch 2D floppy disk drives. This set of PC-8800 computers sold more units than the PC-9800 series at that time.
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In computing, a keyboard controller is a device that interfaces a keyboard to a computer. Its main function is to inform the computer when a key is pressed or released. When data from the keyboard arrives, the controller raises an interrupt (a keyboard interrupt) to allow the CPU to handle the input.
A keyboard matrix circuit is a design used in most electronic musical keyboards and computer keyboards in which the key switches are connected by a grid of wires, similar to a diode matrix. For example, 16 wires arranged in 8 rows and 8 columns can connect 64 keys—sufficient for a full five octaves of range (61 notes).
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The PC-8000 series (Japanese: PC-8000シリーズ, Hepburn: Pī-Shī Hassen Shirīzu) is a line of personal computers developed for the Japanese market by NEC. The PC-8001 model was also sold in the United States [ 5 ] [ 6 ] and Canada as the PC-8001A.
The original NEC PC-8801 up to the MkII; The original NEC PC-9801 with original 8086 CPU before the VM/VX models; All Sharp X1 models before the X1 Turbo Z; The Sharp MZ 700; Fujitsu FM-7, FM New 7, FM 77 before the FM77AV; Sinclair QL; The Macintosh SE with a color printer or external monitor; The SECAM version of the Atari 2600