Fujitsu FM77AV20

The Fujitsu FM77AV20 updated the original AV with 640KB floppy storage while retaining its 4,096-colour graphics and FM sound. It was the more affordable member of Fujitsu’s second AV generation.

Compatibility with FM-7 and FM77AV software preserved the established library, while revised hardware made disk-based games and creative applications more practical.

Notable Features

• Upgraded the AV family to 640KB floppy disks.
• Retained 4,096-colour graphics at a lower price than the AV40.

Historical Significance

• Extended the FM77AV platform for mainstream home users.
• Served as the basis of the later AV20EX.

Collector’s Notes

• AV20 drive count and memory can vary by configuration.
• Do not confuse it with the faster AV20EX introduced in 1987.

Specifications

Technical Information
Name	Fujitsu FM77AV20
Manufacturer	Fujitsu
Launched	Wednesday, October 1, 1986
Country	Japan
CPU	Motorola 68B09E at approximately 2 MHz with Motorola 68B09 display processor
Units Sold
Operating System	F-BASIC and disk operating software
I/O	Joystick, printer, serial, expansion, RGB and audio-visual interfaces
Keyboard	Separate keyboard
Storage	One or two 3.5-inch 640KB floppy drives
Sound	PSG plus FM synthesis
Graphics	320x200 in 4,096 colours
Display	RGB monitor
ROM	F-BASIC and system firmware
RAM	128KB to 192KB main RAM; 96KB video RAM
CPU Speed	Approximately 2 MHz