Fujitsu FM-77

The Fujitsu FM-77 expanded the FM-7 architecture with built-in 3.5-inch floppy storage, additional memory options and improved Japanese-language support. D1 and D2 models provided one or two drives in a substantial desktop case.

Later L-series configurations extended memory and display options, including a 640x400 monochrome mode. The FM-77 formed the direct bridge from the original FM-7 to Fujitsu’s multimedia-focused FM77AV.

Notable Features

• Built-in 3.5-inch floppy storage modernised the FM-7 platform.
• D and L configurations offered different memory, drive and display options.

Historical Significance

• Transitioned Fujitsu’s 8-bit range toward the later FM77AV.
• Helped establish 3.5-inch disks in the company’s personal computers.

Collector’s Notes

• D1, D2, L2 and L4 suffixes describe configurations within the FM-77 family.
• Disk drives and Japanese character ROM options vary by model.

Specifications

Technical Information
Name	Fujitsu FM-77
Manufacturer	Fujitsu
Launched	Tuesday, May 1, 1984
Launch Price	¥198,000 for FM-77D1; ¥228,000 for D2
Country	Japan
CPU	Motorola 68B09 at approximately 2 MHz with Motorola 68B09E display processor
Units Sold
Operating System	F-BASIC and disk operating software
I/O	Printer, serial, joystick, expansion and display interfaces
Keyboard	Separate keyboard
Storage	One or two built-in 3.5-inch 320KB floppy drives
Sound	AY-3-8910, three tone channels plus noise
Graphics	640x200 in 8 colours; optional 640x400 monochrome
Display	RGB monitor
ROM	F-BASIC and system firmware
RAM	64KB to 256KB; 48KB video RAM
CPU Speed	Approximately 2 MHz