National CF-3300
This page was last modified 09:04, 13 April 2019 by Rderooy. Based on work by Mars2000you and Gdx.



The CF-3300 is an home computer produced by the Japanese corporation Matsushita Denki and released in 1985 in Japan. The computer consists out of a single case with an separate keyboard with numeric keypad.

The MSX1 product line from National was called "King-Kong".

This model is available in Silver.

Brand National
Type CF-3300
Year 1985
Region Japan
Original price ¥148,800
RAM 64KB in slot 3-0
Media MSX Cartridges, 3.5" 2DD floppy disks
Video Texas Instruments TMS9928A
Audio PSG
Chipset  ?
Extras Eject button for each cartridge port, Superimpose port, reset button, MSX-DOS + additional software (a demo, a simple graphic editor, MSX Baseball, Home calc)


National CF-3300
National CF-3300 Rear


The CF-3300 is an MSX1.

  • Size: 428×96×285 mm (unit), 426×40×159 mm (keyboard)
  • Weight: 6.8kg

Superimpose unit (CF-2601) was optional.

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
64kB RAM
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM Disk ROM
Page 0000h~3FFFh


  • Video composite output (RCA)
  • RF output (RCA)
  • RGB21 output (not Scart)
  • Centronics connector for Superimpose unit CF-2601
  • Analog sound Output (RCA mono)
  • External Floppy Disk Drive (34 pins)
  • Data Recorder connector
  • Centronics compatible Parallel port for a printer
  • 2 general connectors (Joysticks, Mice, Paddle controllers, etc)
  • 2 cartridge slots (Slot 1 & 2)
  • Keyboard connector
  • Power outlet (100V)