Disc Drive emulation: Difference between revisions

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=CD=
=CD=
==TurboGrafx-CD and CD-ROM²==
:''[[Wikipedia:TurboGrafx-16#Add-ons|TurboGrafx-CD/CD-ROM² and Super CD-ROM²]]''
The System Card 1.0 was included with the launch shipments of the CD-ROM² Interface Unit in 1988 (which did not include the actual CD drive, by the way; that had to be bought separately. ''Altered Beast'' requires it as it hangs with the newer BIOS versions, and someone reported an unspecified problem with ''Populous'' as well.
The System Card 2.0 was included in later shipments of the CD-ROM² System sometime in 1989 (around the time they started selling the Interface Unit and CD drive as a set). It served as the basis for the TurboGrafx-CD BIOS, which features a different title screen to go along with the different naming of the platform and its add-on in the US. Unlike HuCards, CD-ROM² discs are all region-free.
The System Card 2.1, released in 1990 exclusively in Japan, was the first System Card that was sold as a standalone, intended to be a replacement for users who had their original System Cards lost or damaged. Its only new feature was its ability to auto-detect disc changes.
The System Card 3.0 was launched in Japan in 1991. It was initially available built-in with the PC Engine Duo, a model of the console with an integrated CD drive, but was quickly offered as an upgrade to owners of the original CD-ROM² System in the form of the Super System Card, and later as an updated model of the add-on itself known as the Super CD-ROM² unit. The later models of the Duo (Duo-R and Duo-RX) also have this BIOS built-in. Version 3.0 increases the amount of buffer RAM from 64KB to 256KB, hence the addition of the word Super. Games that required this BIOS, which are labelled Super CD-ROM² discs, will display an incompatibility notice when loaded on a prior System Card.
This BIOS was released in the US in 1992 and was similarly offered built-in with the Turbo Duo (the US version of the PC Engine Duo) or as an upgrade for the TurboGrafx-16/CD in the form of the Super System Card (which was available primarily as a mail order).
==Atari Jaguar CD peripheral==
==Atari Jaguar CD peripheral==
The [https://en.wikipedia.org/wiki/Atari_Jaguar_CD Atari Jaguar CD] peripheral has a double-speed (2×) drive and built-in VLM (Virtual Light Machine) software by Jeff Minter, using a spectrum analyzer for a sophisticated video light show for audio CDs.
The [https://en.wikipedia.org/wiki/Atari_Jaguar_CD Atari Jaguar CD] peripheral has a double-speed (2×) drive and built-in VLM (Virtual Light Machine) software by Jeff Minter, using a spectrum analyzer for a sophisticated video light show for audio CDs.