Sharp X1 family
Sharp X1 
sha_x1

Introduction

Sharp had two divisions making computers, the TV division and their home computer division.

The RGB display monitor for the X1 had a television tuner, and a computer screen could be super-imposed 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.

The X1 has the following ports on the back:

  • 6-pin DIN RGB Out
  • TV Control (for use with special TVs)
  • Printer Connector
  • Two standard joystick connectors
  • Mono Audio Out
  • Four I/O slots
  • Serial Keyboard Connector

CPU - The Zilog Z80

The Z80 quickly became popular in the personal computer market, with many early personal computers, such as the TRS-80 and Sinclair ZX80, using the Z80 as their central processing unit (CPU). It was also widely used in home computers, such as the MSX range, SORD, and the Amstrad CPC, as well as in many arcade games. Additionally, it was also used in other applications such as industrial control systems, and embedded systems. The Z80 was widely used until the mid-1980s, when it was gradually replaced by newer microprocessors such as the Intel 80286 and the Motorola 68000.

The Z80 microprocessor was developed by Zilog, a company founded by Federico Faggin in 1974. The Z80 was released in July 1976, as a successor to the Intel 8080. It was designed to be fully compatible with the 8080, but also included new features such as an improved instruction set, more powerful interrupts, and a more sophisticated memory management system.

Originally the Z80 was intended for use in embedded systems, just as the 8080 CPU. But the combination of compatibility, superior performance to other CPUs of the era, and the affordability led to a widespread use in arcade video game systems, and later in home computers such as the Osborne 1, TRS-80, ColecoVision, ZX Spectrum, MSX, Sega's Master System and many more. The Z-80 ran the original Pac-Man arcade cabinet. The Z-80 was used even in the Game Gear (1990s), and the TI-81 and succeeding graphic calculators.

The Z-80 remained in production until June of 2024, 48 years after its original release. Zilog replaced the processor with its successor the eZ80, an 8-bit microprocessor that features expanded memory addressing up to 16 megabytes, and running up to 50MHz, comparable to a Z80 clocked at 150MHz.

Technical Details
Released 1982
Country Japan
Brand Sharp
Type Sharp X1 family
Name Sharp X1
CPU Class Z80
CPU Zilog Z80 @3.58MHz
Memory RAM: 64kB
VRAM: 4kB
Sound Chip General Instruments AY-3-8910
Sound 3 wave channels + white noise
Display Chip PCG - Programmable Character Generator
Display 320x200, 620x200
8 colors
Best Color 8 colors
Graphics 640x200 in 8 colors
Sprites none
System OS Hu-BASIC, CP/M
Storage Built in Tape Drive
External Links 🌐
Sarp X1
Wikipage for the Sharp X1
Sharp X1 Games & More
Sharp X1 ROM database. Here you will find X1-Turbo ROMs and other info.
Sharp X1 SuperImpose
Video on how to use the SuperImpose feature on the X1.
Sharp X1 Manuals
Find the manuals for the Sharp X1 computer here to read.
Games for the Sharp X1
An overview of games for the Sharp X1 line of computers
Z80 CPU
Wikipedia page on the very popular Z80 8-bit CPU used in many computers of the 1980's era.