The X1 sometimes called the Sharp X1 or CZ-800C, is a series of home computers released by Sharp Corporation from 1982 to 1988. It is based on a Zilog Z80 CPU. The RGB display monitor for the X1 had a television tuner, and a computer screen could be superimposed on TV. All the TV functions could be controlled from a computer program. The character font was completely programmable (PCG) with 4-bit color, and was effectively used in many games. The entirety of the VRAM memory was mapped on to the I/O area, so it was controlled without bank switching. These features made the X1 very powerful for game software. Despite the fact that the Computer Division of Sharp Corporation had released the MZ series, suddenly the Television Division released a new computer series called the X1. At the time the original X1 was released, all other home computers generally had a BASIC language in ROM. However the X1 did not have a BASIC ROM, and it had to load the Hu-BASIC interpreter from a cassette tape. On the plus side however, this concept meant that a free RAM area was available that was as big as possible when not using BASIC. This policy was originally copied from the Sharp MZ series, and they were called clean computers in Japan. The cabinet shape of X1 was also much more stylish than others at that time and a range of cabinet colors (including Red) was selectable.

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