Hitachi Computers Basic Master
MB 6890  (1980)
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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

CPU - The Motorola 6809

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
Country
Japan
Brand
Hitachi
Type
Hitachi Computers Basic Master
Name
MB 6890
CPU Class
6800/6809
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
Graphics
640x200
Sprites
no sprites
System OS
Hitachi Level 3 Basic v1.0
Storage
External Tape
Related Systems 💾
Hitachi Computers Basic Master
External Links 🌐
Motorola 6809 CPU
Wikipage about the Motorola 6809 CPU and compatibles