What are the Technical Specs of the Turbo Grafx/PC Engine

What are the Technical Specs of the Turbo Grafx/PC Engine?

Custom 8bit CPU: HuC6280 (7.16MHz)
Video Processor: HuC6270
Color Processor: HuC6260
Color Pallet: 512
On screen: 512 (256 for sprites, 256 for the background.)
Screen resolution 256x216
Sound: 6 channel stereo (5-bit sampling)
Can Control 64 sprites at once (16 colors and 32x64 max size.)
Ram: 8 Kbyte (TurboDuo = 32 Kbyte)
Video Ram: 64Kbyte " 512 Kbit"
Cart Size: 256Kbit - 20 Megabit Max. (S.F. 2) Normally 8 Mbits
Turbo CD / TurboDuo CD ROM Speed: 1x