Fujitsu FM77AV40

The Fujitsu FM77AV40 was the higher-specification partner to the AV20. It increased memory, added a 640x400 display mode and supplied stronger Japanese text support while preserving the AV’s 4,096-colour low-resolution graphics.

Dual 640KB floppy drives and its broader display modes made the AV40 better suited to productivity and creative work as well as games. It led directly to the AV40EX and AV40SX.

Notable Features

• Added a 640x400 eight-colour mode to the AV graphics system.
• More memory and standard Japanese text support distinguished it from the AV20.

Historical Significance

• Established Fujitsu’s premium 8-bit AV configuration.
• Became the parent of the enhanced EX and SX models.

Collector’s Notes

• The AV40 is physically and technically close to later EX machines.
• Confirm the exact suffix before sourcing memory or video accessories.

Specifications

Technical Information
Name	Fujitsu FM77AV40
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	Two built-in 3.5-inch 640KB floppy drives
Sound	PSG plus FM synthesis
Graphics	320x200 in 4,096 colours; 640x400 in 8 colours
Display	RGB monitor
ROM	F-BASIC and Japanese character firmware
RAM	192KB to 448KB main RAM; 144KB video RAM
CPU Speed	Approximately 2 MHz