Daewoo CPC-400
This page was last modified 01:12, 22 March 2019 by Mars2000you. Based on work by Gdx and Hongsik and others.



The Daewoo CPC-400, also called the X-II, has been manufactured and distributed by Daewoo on the Korean market.

The keyboard is separate. The layout is Korean. The color of unit is available in black or dark silver. The power supply is integrated in the unit.

As the CPC-300 this model has the particularity of using a light pen handled by the V9938 and it has an expansion bus that was popular in Korea.

This model has an extra text mode in Basic, the SCREEN 9. It is a text screen mode based on the graphic SCREEN 6 to display Korean characters.

Brand Daewoo
Type CPC-400
Year 1986
RAM 128kB in slot 0-2
VRAM 128kB
Media MSX cartridges, 2DD floppy disk
Video Yamaha V9938
Audio PSG (AY-3-8910A)
Chipset Daewoo DW64MX1
Extras Hangul BASIC, lightpen connector, reset button, 1 or 2 floppy disk drive, stereo PSG sound


Daewoo CPC-400 box
Daewoo CPC-400 mainboard
Daewoo CPC-400
Daewoo CPC-400 rear


The CPC-400 is a MSX2 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 128kB
Page 8000h~BFFFh Hangul
Page 4000h~7FFFh Main-ROM Sub-ROM Disk ROM
Page 0000h~3FFFh


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