Hitachi Computers  MB 6890
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Hitachi MB-6891

The Hitachi MB6890 was released in 1980 with Hitachi Level-3 BASIC version 1.0

The computer came with 48KByte of main RAM and 16KByte of VRAM. It was capable of high resolution of 640x200 and could display up to 8 colors.

The following optional peripherals were available:

  • Tape Recorder
  • Printer interface
  • Light-Pen
  • Chinese Character ROM board
  • 8088 CPU Board
  • Disk Interface Board
  • Z80 CPU Board
  • RAM expansion boards

Motorola 6809 CPU

The Motorola 6809 is an 8-bit microprocessor with some 16-bit features. It was designed by Motorola's Terry Ritter and Joel Boney and introduced in 1978. Although source compatible with the earlier Motorola 6800, the 6809 offered significant improvements over it and 8-bit contemporaries like the MOS Technology 6502, including a hardware multiplication instruction, 16-bit arithmetic, system and user stack registers allowing re-entrant code, improved interrupts, position-independent code and an orthogonal instruction set architecture with a comprehensive set of addressing modes.

Technical Details
Released 1980 Brand Hitachi Type Hitachi Computers Basic Master Name MB 6890 CPU Class 6809 CPU Motorola 6809 Memory RAM: 48kB
ROM: 24kB
VRAM: 16kB
Sound Chip none Sound unknown Display Chip none Display 80x28 text, 640x200 in 8 colors Best Text 80x28 Best Color 8 colors Best Graphics 640x200 Sprites none System OS Hitachi Level 3 Basic v1.0 Storage External Tape
Related Systems
Hitachi Computers Basic Master
MB  6890 (1980)
Related Media
Hitachi Basic
Books about the Hitachi Basic Master computers
I/O Magazine
Japanese Magazine about home computers in Japan such as the Hitachi Basic Master, Sharp MZ, and NEC home computers.
The 6502/6809 Journal
World Wide Web Links
Wikipedia: Motorola 6809 CPU
Wikipage about the Motorola 6809 CPU and compatibles