Panasonic FS-A1F
This page was last modified 23:34, 12 April 2019 by Rderooy. Based on work by Mars2000you and Gdx and others.




The Panasonic FS-A1F MSX2 is basically a FS-A1mkII with a built-in 3.5" floppy disk drive mounted on the front of the case, below the keyboard. The FS-A1F was available in black. It was aimed at the Japanese market.

This model has also been released by Kawai under the name KMC-5000.

Brand Panasonic
Type FS-A1F
Year 1986
Region Japan
Original price ¥54.800
RAM 64kB in slot 3-0
VRAM 128kB
Media MSX cartridges, 2DD floppy disks
Video Yamaha V9938
Audio PSG (integrated in MSX-Engine S1985)
Chipset Yamaha S1985
Extras 720kB 3,5" floppy disk drive, MSX-DOS (on disk), DESKPAC firmware, reset button, pause button, Kanji-ROM level 1, Kanji driver ROM, Utility disk


The firmware is launched automatically when you boot the machine. Bypassing this software on startup requires the user to press the DEL key during boot until a Beep sound.

The built-in firmware is a new version of the well-known Panasonic DESKPAC software (Clock settings, Screen adjust, Clock, Calendar, Calculator, Screen colors + 3 options that require the utility disk: disk tool, graphic tool in SCREEN 8, the application Word Processor, Address Book & Name Card).



Panasonic FS-A1F
Panasonic FS-A1F back
Panasonic FS-A1F box
Panasonic FS-A1F PCB
Panasonic FS-A1F Motherboard and Disk Drive
Panasonic FS-A1F disk, cables, manuals
Panasonic FS-A1F Utility disk


DESKPAC Clock settings
DESKPAC Screen adjust
DESKPAC Calendar
DESKPAC Calculator

Utility disk

DESKPAC Disk tool
DESKPAC Word Processor, Address Book & Name Card
DESKPAC Graphic tool


The Panasonic FS-A1F is a MSX2 with 2 cartridge slots (one at the top, one at the back), a Z80A from Zilog (Z08400-04PSC) and an MSX-Engine S1985 from Yamaha.

Floppy Disk Belt specifications:

Type: Rubber Belt
Thickness: 0.3mm
Diameter: 58mm
Width: 3mm

Slot Map

Slot 0 Slot 1 Slot 2 Slot 3-0 Slot 3-1 Slot 3-2 Slot 3-3
Page C000h~FFFFh Cartridge
Slot 1
Slot 2
Page 8000h~BFFFh Kanji driver A1 Cockpit
Page 4000h~7FFFh Main-ROM Disk ROM
Page 0000h~3FFFh Sub-ROM


Fixes, Repair and Upgrades

  • During a floppy drive belt swap, You must not unscrew the optical sensor from the drive... instead you must unsolder it from the FDD mainboard, and slip the belt over the optical sensor.
Panasonic FS-A1F Disk Drive Pins requiring unsoldering
Panasonic FS-A1F Disk Drive before Belt swap

External links