Daewoo CPC-50A
This page was last modified 00:03, 14 April 2019 by Rderooy. Based on work by Mars2000you and Gdx.

Contents

Description

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. There are 2 different versions of the mainboard.

Brand Daewoo
Type CPC-50A
Year 1986
Region South Korea
Original price ₩70,000
₩81,000 with joystick
RAM 8kB (? in slot 0)
VRAM 16kB
Media Cartridges
Video Texas Instruments TMS9918ANL
Audio PSG (AY-3-8910A)
Chipset Daewoo DW64MX1
Extras Reset button, 1 joystick, 1 cartridge (20 games in 1)

Pictures

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 PCB

Specifications

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).

Connections

  • 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

Emulation

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!