Daewoo CPC-50A
This page was last modified 15:37, 14 February 2018 by Mars2000you. Based on work by Gdx and Rderooy.



The Daewoo CPC-50A is a MSX1 console with only 8kB RAM. It has been released by the Korean company Daewoo in 1986 and was available in pink/white or green/white. All MSX-compatible consoles from Daewoo are called Zemmix that means 'It's Fun'.

This machine has only one cartridge slot and it's not possible to add a keyboard. It comes with a massive AC power adaptor including a power switch. There are 2 different versions of the mainboard.

Official price was ₩70,000 the unit, ₩81,000 with a joystick.

Brand Daewoo
Type CPC-50A
Year 1986
RAM 8kB (? in slot 0)
Media Cartridges
Video Texas Instruments TMS9918ANL
Audio PSG (AY-3-8910A)
Chipset Daewoo DW64MX1
Extras Reset button


Daewoo Zemmix CPC-50A front connectors
Daewoo Zemmix CPC-50A back
Daewoo Zemmix CPC-50A pink/white
Daewoo Zemmix CPC-50A box
Daewoo Zemmix CPC-50A label
Daewoo Zemmix CPC-50A AC power adaptor (on left) compared to smaller adaptor
Daewoo Zemmix CPC-50A green/white
Daewoo Zemmix CPC-50A inside
Daewoo Zemmix CPC-50A PCB


The CPC-50A is a MSX1 console that does not use a MSX-Engine but a custom IC DW64MX1 that includes the 8255 PPI, slot select circuitry, a memory mapper and various glue logic. The CPU is a Z80A from NEC (D780C-1).


  • RF output
  • Analog sound & Composite video
  • 2 general connectors (Joysticks, Mouse, Graphic pad, Paddle controlers, etc)
  • 1 cartridge slot
  • 1 connector for AC power adaptor


In emulators, this console can be easily converted into a MSX1 computer with keyboard, second cartridge slot, etc. However, Hangul BASIC is not available, as there is only one ROM in this machine: a slightly modified version of the BIOS+BASIC rom.

After booting, you come to an empty black screen, just like on the Sega SG-1000 console. It's an illusion! By default, you are in SCREEN 1 with COLOR 15,1,1. Just enter COLOR 15,4,7 to get the classical SCREEN 1 screen.

You will also notice that the system does not provide any 'Ok' message or MSX-BASIC info text, the cursor is invisible and the content of the function keys is empty. All these tricks are just to make think that it's a game console!

Repair and Upgrade