which supposedly fixed some minor audio issues. A recolored version of the model, known as the PC Engine CoreGrafx II, was released on June 21, 1991. Aside from the different coloring (light grey and orange), it is nearly identical to the original CoreGrafx except that the CPU was changed back to the original HuC6280. SuperGrafx The PC Engine SuperGrafx, released on the same day as the CoreGrafx in Japan, is an enhanced variation of the PC Engine hardware with updated specs. This model has a second HuC6270A (VDC), a HuC6202 (VDP) that combines the output of the two VDCs, four times as much RAM, twice as much video RAM, and a second layer/plane of scrolling. It also uses the revised HuC6280A CPU, but the sound and color palette were not upgraded, making the expensive price tag a big disadvantage to the system. As a result, only five exclusive SuperGrafx games and two hybrid games (Darius Plus and Darius Alpha were released as standard HuCards which took advantage of the extra video hardware if played on a SuperGrafx) were released, and the system was quickly discontinued. The SuperGrafx has the same expansion port as previous PC Engine consoles, but requires an adapter in order to utilize the original CD-ROM² System add-on, due to the SuperGrafx console's large size. Shuttle The PC Engine Shuttle was released in Japan on November 22, 1989, as a less expensive model of the console, retailing at ¥18,800. It was targeted primarily towards younger players with its spaceship-like design and came bundled with a TurboPad II controller, which is shaped differently from the other standard TurboPad controllers. The reduced price was made possible by slimming down the expansion port of the back, making it the first model of the console that was not compatible with the CD-ROM² add-on. However, it does have a slot for a memory backup unit, which is required for certain games. The RF output used on the original PC Engine was also replaced with an A/V port for the Shuttle. The PC Engine Shuttle was distributed in South Korea also. It was released in 1990 by Daewoo Electronics. TurboExpress The PC Engine GT is a portable version of the PC Engine, released in Japan on December 1, 1990, and then in the United States as the TurboExpress. It can play only HuCard games. It has a backlit, active-matrix color LCD screen, the most