Hitachi Computers  MB 6885
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Hitachi MB-6885 Basic Master Jr

The Hitachi MB-6885 is the successor of Hitachi's MB-6881. Competition with NEC, Commodore and Panasonic was fierce, and this computer did not gain much ground.

The machine runs on the Motorola 6800 processor, has an optional graphics adapter which enabled it to display 256x192 resolution in 8 colors. RAM is shared by the CPU and the Video interface.

The machine had the following interfaces:

  • Printer Port
  • Cassette MT interface Expansion bus for Color Interface

Motorola 6800 CPU

The 6800 is an 8-bit microprocessor designed by Motorola in 1974. The processor was developed as part of the M6800 Microcomputer System that was announced in the same year.

The 6800 has a 16-bit address bus that can directly access 64KB of memory and an 8-bit bi-directional databus. The CPU has a total of 72 instructions using seven different addressing modes, resulting in 197 opcodes. The original 6800 used a clock frequency of up to 1 MHz, while later versions increased this limit to 2MHz.

The 6800 was used in various computer systems and point of sale terminals. It can also be found in older arcade systems and pinball machines. It was succeeded by the MC6802 which was released in 1977. This CPU had 128 bytes of RAM on board and an internal clock oscillator. The later produced Motorola 6809 was stil backwards compatible with the 6800.

Technical Details
Released 1981 Brand Hitachi Type Hitachi Computers Basic Master Name MB 6885 CPU Class 6800 CPU Motorola 6800 @ 0.8MHz Memory RAM: 16kB
ROM: 18kB
Sound Chip none Sound 3 octaves Display Chip none Display 64x48 text, 256x192 graphics Best Color 8 colors using optional color adapter Best Graphics 256x192 Sprites none System OS MB-6880 BASIC Storage External Tape Original Price 89,800
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MB  6885 (1981)
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Japanese Magazine about home computers in Japan such as the Hitachi Basic Master, Sharp MZ, and NEC home computers.
 
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World Wide Web Links
 
Wikipedia: Motorola 6800 CPU
The 6800 is an 8-bit microprocessor designed by Motorola in 1974.