Setname:  fm77av   
Year: 1985
Manufacturer: Fujitsu
Status: imperfect  badworks
Type: Home Computer
Parent: FM-7
Emulation info
Overall emulation:  good   
Color emulation:  good  
Sound emulation:  good  
Graphics emulation:  imperfect  
Savestates:  unsupported   

Tech info
 Base hardware: (available in all slot configurations)
M6809 ("maincpu")cpu 2000000 Hz
M6809 ("sub")cpu 2000000 Hz
Speaker ("mono")audio
YM2203 ("ym")audio 1228800 Hz
Beep ("beeper")audio
Wave ("wave")audio
Screen ("screen")raster horizontal 640 x 200 @ 60.000000
Media devices
cassette ("cassette") cassette cass wav, t77
floppydisk ("floppy0") floppydisk1 flop1 fdi, td0, imd, cqm, dsk, d77, d88, 1dd
floppydisk ("floppy1") floppydisk2 flop2 fdi, td0, imd, cqm, dsk, d77, d88, 1dd
Software lists

 Optional hardware: (available with specific slot configurations)

 Configure the slot options for fm77av:
 Slot Value

Show detailed info about 'DipSwitches' of this system

Switch A Off
Boot mode DOS
Switch C Off
FM-8 Compatibility mode Off

Show detailed info about 'Slot Options' of this system
Slot options

NameValueCompatible device(s)
centronics ap2000ap2000
 printer centronics_printer

Romset info
ROM NameSizeCRC32SHA1Dump StateBIOS option
initiate.rom8192 785cb06cb65987e98a9564a82c85eadb86f0204eee5a5c93good
fbasic30.rom31744 a96d19b68d5f0cfe7e0d39bf2ab7e4c798a13004769c28b2good
subsys_c.rom10240 24cec93f50b7283db6fe1342c6063fc94046283f4feddc1cgood
subsys_a.rom8192 e8014fbb038cb0b42aee9e933b20fccd6f19942e2f476c83good
subsys_b.rom8192 9be69fac0305bdd44e7d9b7b6a17675aff0a3330a08d21a8good
subsyscg.rom8192 e9f16c428ab466b1546d023ba54987790a79e9815d2b7bb2good
kanji.rom131072 62402ac9bf52d22b119d54410dad4949b0687bb0edf3e143good


* CPUs:
* M68B09E @ 2MHz (main CPU for general use)
* M68B09E @ 2MHz (sub CPU for graphics work)
* RAM:
* 128kB system RAM
* 96kB video RAM
* 8kB boot RAM
* ROM:
* 32kB Fujitsu F-BASIC 3.0
* 8kB initialisation ROM
* 3x 8kB sub-system (3 sets of sub CPU code)
* 4x 2kB sub-system CG fonts (katakana, hiragana, and 2 others)
* Video:
* 640x200x8, 8 colour palette
* 320x200x4096, 4096 colour palette
* Sound: YM2203, plus a simple beeper
* I/O ports: Cassette, Floppy disk, 2x Joystick, Printer
* OS: Fujitsu F-BASIC, Fujitsu Disk F-BASIC (must boot from a floppy disk to be able to use disk functions)

Known Issues

* Keyboard emulation is incomplete
* Video functionality is incomplete
* Beeper is not yet implemented
* RTC is not yet implemented



MESS supports both .T77 and .WAV cassette images.

To use a cassette, boot without any disks inserted to get to the F-BASIC ready prompt. Mount a cassette image either beforehand, via the ''-cass'' switch on the commandline, or via the MESS file manager (TAB menu). Then, from the MESS tape control menu (TAB menu, again), select Play. Exit the menu, and at the F-BASIC Ready prompt, type ''run""''. The tape now starts playing, and will load the software on the tape.

Please note, that only .WAV files support recording, .T77 files are read-only.


MESS supports .D77 disk images.

To use a disk, simply mount it via the ''-flop1'' switch on the commandline. The disk should automatically boot the software on it. You can also use the MESS file manager to mount the disk, then restart the system with F3.

Please note, that for now at least, .D77 files are read-only.

FM-7 compatibility

All FM-7 software should be backwards compatible with the FM-77AV

History and Trivia

The FM 77 AV was an impressive system in 1985. It's a good example of what was developped in Japan and we never heard of in the rest of the world.

The system has great audio and video features, hence the AV for "Audio and Video". It can display 640 x 200 pixels in two colors, or 320 x 200 in 4096 colors ! There is even a multipage mode where you can define two 460 x 200 screens with 8 colors each, or six 640 x 200 monochrome screens !

There are a lot of graphical symbols already stored in memory (each symbol / letter is composed by 8 x 8 pixels) : 69 alphanumeric symbols, 63 kakatana signs, 63 hiragana signs and 62 graphic symbols. Moreover, the system is capable of displaying 3418 chinese and asiatic characters with a 16 x 16 character matrix (text resolution is thus of 40 x 12).

Last but not least, the FM 77 AV offers superimposition features...
On the sound side, it offers three FM voices and three more PSG voices. Other cool features include infra-red keyboard and built-in real time clock.

There were two models : the AV-1 which has one 3.5" disk-drive (double density) built-in and the AV-2 which is equipped with two of these drives.

(info from

Other Emulators

XM7 -- (v2.x, v3.x - Win32)

Edit the History info for this game.


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