Disc Drive emulation: Difference between revisions

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[https://segaretro.org/Sega_Dreamcast/Technical_specifications#Memory All VA0, VA1, VA2 Dreamcasts universally support GD‑ROM, and all VA0, VA1 and some VA2 Dreamcasts (early VA2s, later VA2s had their BIOS having dropped CD support in an effort to combat piracy) support CD‑ROM, Audio CDs and CD‑DA.] [https://www.angelfire.com/games2/dctech/vcds.html However CD+G?, Photo CDs? and Video CDs are not officially supported, though it's compatible with workarounds.]
[https://segaretro.org/Sega_Dreamcast/Technical_specifications#Memory All VA0, VA1, VA2 Dreamcasts universally support GD‑ROM, and all VA0, VA1 and some VA2 Dreamcasts (early VA2s, later VA2s had their BIOS having dropped CD support in an effort to combat piracy) support CD‑ROM, Audio CDs and CD‑DA.] [https://www.angelfire.com/games2/dctech/vcds.html However CD+G?, Photo CDs? and Video CDs are not officially supported, though it's compatible with workarounds.]


==UMD Drive==
==PlayStation Portable's UMD Drive==
The physical UMD Drive utilizes a 660nm red laser mechanism to read dual-layer optical discs with a maximum capacity of 1.83 GB and a data transfer rate of up to 11 Mbps (1.375 MB/s). Aside from reading standard game data, the drive's firmware and hardware layers handle region coding and copyright protection, which dictates how the PSP separates game executables from multimedia content layers.  
The physical UMD Drive utilizes a 660nm red laser mechanism to read dual-layer optical discs with a maximum capacity of 1.83 GB and a data transfer rate of up to 11 Mbps (1.375 MB/s). Aside from reading standard game data, the drive's firmware and hardware layers handle region coding and copyright protection, which dictates how the PSP separates game executables from multimedia content layers.