Daewoo CPC-50A
This page was last modified 13:37, 27 June 2021 by Mars2000you. Based on work by Rderooy and Gdx.



The Daewoo CPC-50A is the second revision of CPC-50. It was available in pink/white or green/white. All MSX-compatible consoles from Daewoo are called Zemmix that means 'It's Fun'.

The MSX logo does not appear on this machine, because the absence of keyboard makes it not fully corresponding to a MSX computer. We can therefore speak of a hidden MSX!

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.

Do not use the power supply of CPC-50 or CPC-50B on the CPC-50A!

Brand Daewoo
Model CPC-50A
Year 1986
Region South Korea
Launch price ₩70,000
₩81,000 with joystick
RAM 8kB (? in slot 0)
Media Cartridges
Video Texas Instruments TMS9918ANL
Audio PSG (AY-3-8910A)
Chipset Daewoo DW64MX1
Keyboard layout no keyboard
Extras Reset button, 1 joystick CPJ-902, 1 cartridge (20 games in 1)
Emulation ROM dump needed. See this thread for details


Daewoo Zemmix CPC-50A green/white
Daewoo Zemmix CPC-50A back
Zemmix CPC-50A underside
Daewoo Zemmix CPC-50A pink/white
Zemmix CPC-50A front connectors
Daewoo Zemmix CPC-50A box
Daewoo Zemmix CPC-50A AC power adaptor (on left) compared to smaller adaptor
Daewoo Zemmix CPC-50A label
Daewoo Zemmix CPC-50A with 2 joysticks
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, Mice, Paddle controllers, etc)
  • 1 cartridge slot
  • Power supply input: +/-20V and +12.5V (CP-50A) (8-pin DIN type 8A)

Repair and Upgrade


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!