NEC PC Engine Duo

4th Generation Competitors
Neo Geo CD	Megadrive	Super NES	Neo Geo AES	CDTV	Philips CDI

Region	Release Date	Discontinued	Lifetime Sales
Japan	21st Sep 1991	1995
North America	10th Oct 1992	1995
Europe	NA	NA	NA

Whilst the SuperGrafx was largely failing in the market, NEC kept pushing the PC Engine platform.  One of it’s various versions (and my personal favourite) was the PC Engine Duo.

The Duo took the PC Engine and combined it, in one sleek package, with the SuperCD addon.  It was certainly successful in terms of hardware, the unit was far more convenient than the previous add on units had been and was very reliable.

The Duo was also released in North America as the TurboDuo but never made it to Europe.

Specs
Processor	8 Bit HuC6280A @ 1.79 or 7.16 MHz
RAM	8K Work Ram, 64K Video Ram, 192K CD Cache
ROM	16K
Custom Chips	1 x HuC6270A 16 bit video chips
Video	9 bits 482 colours on screen from a palette of 512
Audio	6 x PSG Channels
Removable storage	Single Speed CD Rom