Daewoo CPC-51
This page was last modified 13:48, 29 January 2019 by Gdx. Based on work by Mars2000you and Rderooy.



The CPC-51 aka Zemmix V (V for Victory) is a surprizing MSX1 console with its aerodynamic design and its interchangeable wings. The power supply is integrated in the unit.

It was released by the Korean company Daewoo in 1988 and was available first only in red/black, then a second release offered 3 different color versions: black/blue/yellow (B), red/black (R) and white/gray (W). All MSX-compatible consoles from Daewoo are called Zemmix which means 'It's Fun'.

CPC-51 Initial release in red/black
CPC-51B re-release in black/blue/yellow
CPC-51R re-release in red/black
CPC-51W re-release in white/gray

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, although there were plans to allow such an extension on the underside of the unit: no such keyboard has however been released for this model.

Official price was ₩96,000 the unit.

Brand Daewoo
Type CPC-51
Year 1988
RAM 64kB in slot 0-2
Media Cartridges
Video Texas Instruments TMS9918ANL
Audio PSG (AY-3-8910A)
Chipset Daewoo DW64MX1


Daewoo Zemmix CPC-51
Daewoo Zemmix CPC-51 box
Daewoo Zemmix CPC-51 underside
Daewoo Zemmix CPC-51 front
Daewoo Zemmix CPC-51 back
Daewoo Zemmix CPC-51 right side
Daewoo Zemmix CPC-51R box
Daewoo Zemmix CPC-51B back
Daewoo Zemmix CPC-51B box
Daewoo Zemmix CPC-51W front
Daewoo Zemmix CPC-51W back
Daewoo Zemmix CPC-51W right side
Daewoo Zemmix CPC-51B
Daewoo Zemmix CPC-51W
Daewoo Zemmix CPC-51 inside


The CPC-51 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 Goldstar (GSS Z8400A PS).

The main RAM is present on slot 0-2, a configuration that can cause poorly written software to crash. Also, with this layout, the POKE-1,(15-PEEK(-1)\16)*17 trick to workaround buggy software that does not handle subslots properly will cause this machine to freeze.

Slot Map

Slot 0-0 Slot 0-1 Slot 0-2 Slot 0-3 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh 64kB
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh



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