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PC-ENGINE and TURBOGRAFX-16 core decks system specs:

CPU: 8-bit HuC6280A

GPU: One 16-bit HuC6260 Video Color Encoder (VCE), and one 16-bit HuC6270 VDC

Memory: 8 KB work ram and 64 KB video ram

Audio: 6 PSG audio channels, programmable through the HuC6280 CPU

System 1-2 Card with USA or Japanese cd-rom unit specs:

Oki MSM5205 ADPCM chip with  64 KB DRAM for audio sample storage. One channel of 4-bit     compressed audio (decompresses to 12-bit, top 10 bits output through DAC) is supported.

Programmable, timer controlled, electronic volume attenuator to fade-out the CD-DA and ADPCM audio channels together or seperately.

PC-Engine CD-ROM interface tray has 64 KB of DRAM for storage of program code and data loaded from the CD. The Super System 3 card would add 192 KB more.

The System Card contains the bios program used to boot CD media and provides functions for software to access CD hardware through a standardized interface. Later System Cards had extra RAM and updates to the bios.

PC-ENGINE Duo/Duo-R and RX and TurboDuo added system specs:

The Duo series has the same bios rom and ram as a PC-Engine system equipped with a Super System Card. 256 KB in total. The Duo implements the memory as one 256 KB SRAM chip rather than split 64 KB DRAM / 192 KB SRAM chips.

PC-ENGINE SuperGrafx system specs:

CPU: 8-bit HuC6280A, running at 1.79 or 7.16 MHz

GPU: A multiple GPU setup. One 16-bit HuC6260 Video Color Encode, two 16-bit HuC6270A Video Display Controllers, and one HuC6202 VPC.

Memory: 32KB of work ram and 128KB of video ram.

Six PSG audio channels, programmable through the HuC6280A CPU.

 There are many other models of the system,from the portable versions to stand alone units like the Shuttlegrafx that can not be used with a CD-Rom unit. The system specs of those are basically the same as the PC-ENGINE and TURBOGRAFX-16 systems other then having LCD screens, or as in the case of the Sharp computer combo unit also having a separate working computer pcb housed inside the same casing.

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