Panasonic FS-3900
This page was last modified 03:51, 18 January 2021 by Mars2000you. Based on work by Rderooy and Gdx.




The Panasonic FS-3900 is a "Wordprocessor Personal Computer" for the European market with a built-in 24 dots thermal transfer printer. It would appear to be similar to the National FS-4000 which was targeted for the Japanese market.

This system is very rare, insomuch that only one system is known to exist. It has a German QWERTZ keyboard, but the included firmware is in 3 languages (English, German and French). There are 3 manuals, of which one is in German and the other two are also in the same three languages.

There is speculation that Panasonic was looking to enter the European market: as mentioned in the Japanese MSX Magazine 1986-05, page 163, it had been shown at the CeBit fair of Hannover in March 1986, but in the end Panasonic decided not to continue. What is strange is that the system looks complete, including manuals, so it seems unlikely that only one unit was produced.

Brand Panasonic
Type FS-3900
Year 1986
Region Germany
Original price
RAM 64kB (? in slot 3-2)
Media MSX cartridges
Audio PSG
Keyboard layout QWERTZ
Extras Word Processor firmware
Emulation ROM dump needed. See this thread for details


The built-in application is a Word Processor in 3 languages (English, German and French).

This firmware is on a 32kB ROM and contains many printer related instructions. It assigns important commands of the word processor to the functions keys when the computer is used in this special mode.


Panasonic FS-3900
Panasonic FS-3900 manuals
Panasonic FS-3900 detail


The Panasonic FS-3900 is a MSX1 with 2 cartridge slots and an integrated thermal printer.

Slot Map

Help needed
The below slot-map is an assumption, it needs to be checked on a real machine.
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
Page 4000h~7FFFh Main-ROM Word
Page 0000h~3FFFh


External links