Panasonic FS-A1WX
This page was last modified 16:30, 5 January 2017 by Rderooy. Based on work by Mars2000you and Gdx and others.



The FS-A1WX is a computer released on the Japanese market by Panasonic. It is almost the same as the FS-A1FX but with MSX-MUSIC and a Japanese Word processor as extra, which explains why the "取消" (Cancel) and "実行" (Execute) keys have been added to the keyboard.

The Ren-Sha Turbo feature provides auto-fire mode while playing games. The repetition speed can be adjusted with a slider.

This model was available in black. Official price: ¥69,800

It was also sold in a special bundle (FS-A1WXH) containing the computer, the thermal printer FS-PA1 and three games: Galaxian, Hydlide 3 and Snatcher.

By comparison with the version available on the F1S-A1FX, the built-in Cockpit software has been completely revised to integrate the Word Processor, where one of the options requires the first system disk with the MSX-JE input system for the kana-kanji conversion. The options to change the screen colors or adjust the screen have been removed while the disk tool, the graphic tool in SCREEN 8 and the picture gallery in SCREEN 12 are now independent programs on a second system disk.

The firmware program can be skipped by pressing DEL key while booting or by changing the position of the front switch before booting the computer. From MSX-BASIC, you can go to the firmware menu with CALL MENU or _ MENU. When you quit an application of the second system disk, you come on the MSX-DOS command line; by entering TOOL on this command line, you can go back to the menu of this system disk.

Brand Panasonic
Type FS-A1WX
Year 10-1988
RAM 64kB
VRAM 128kB
Media 720kB 3,5" floppy disk drive
Video Yamaha V9958
Chipset Toshiba T9769 model A or B
Extras Ren-Sha Turbo (autofire), hardware pause key, MSX Music, 256kB Kanji-ROM JIS level 1 & 2 , firmware (A1 Cockpit, Word Processor, MSX-JE), Z80 compatible CPU built in MSX Engine (T9769x) that can be switched to 3.57MHz or 5.37MHz via I/O ports, Kanji BASIC


Panasonic FS-A1WX
Panasonic FS-A1WX PCB
Panasonic FS-A1WX PCB back
Panasonic FS-A1WX FM Chips
Panasonic FS-A1WXH box


The FS-A1WX is a MSX2+ with 2 cartridge slots (one at the top, one at the back) and a Z80A integrated in MSX-Engine T9769(A or B) from Toshiba. This Z80A can be switched from to 3.57MHz to 5.37MHz via I/O ports. There is a front switch to disable the firmware application execution. Firmware can be accessed from BASIC via CALL MENU-command.

The features the Rensha Turbo, which is a built-in auto-fire system. The repetition speed can be adjusted with a slider. Its ROM contains A1 Cockpit Internal Software, MSX Word Processor, MSX-JE, FM-BIOS (MSX Music Basic ROM) and Kanji Support (JIS level 1 & 2).

Main RAM can be natively expanded to 256kB internally. (See below)


  • RF output
  • RGB output
  • Analog sound & Composite video
  • Tape recorder connector
  • Centronics compatible Parallel port for a printer
  • 2 general connectors (joysticks, mouse, paddle controllers, ...)
  • 2 cartridge slots

CPU Turbo mode

Contrary to Sony and Sanyo MSX2+ systems which run only at 3.57Mhz, the Panasonic systems are capable of running at 5.37MHz. In Basic this can be achieved using the following commands.

Activating the 5.37 MHz Mode

Switching to Turbo 5.37 MHz mode can be activated with the following command.

IF PEEK(&H2D)=2 THEN OUT 64,8:IF INP(64)=247 THEN OUT 65,0

Switching back to 3.57Mhz is done with this command.

IF PEEK(&H2D)=2 THEN OUT 64,8:IF INP(64)=247 THEN OUT 65,1