People who were still using a PC Engine console with the original CD-ROM² System add-on could opt for the Arcade Card Pro instead, which essentially combines the functionalities of the Arcade Card Duo and the Super System Card into one by adding the 16-Megabits of D-RAM from the former on the top of the 192kB of added buffer RAM and BIOS update from the latter. Unlike previous System Cards, the change was purely on a hardware level and there was no BIOS update this time, keeping it strictly on Version 3.0. The Arcade Card Duo, designed for PC Engine consoles equipped with the Super CD-ROM², adds 16-Megabits of D-RAM on top of the 256kB of buffer RAM within the hardware. The Arcade Cards, released in 1994, were the final set of upgrades to the PC Engine CD-ROM² System and came in two variants. (a joint venture between NEC and Hudson Soft), who opted to abandon the TurboGrafx-CD branding for the CD games in favor of keeping the CD-ROM² and Super CD-ROM² branding used in Japan. This was due to distribution of TurboGrafx-16 software and hardware shifting from NEC's U.S. version of this BIOS, NEC went through the bare minimum effort of localizing it by simply removing the "PC Engine" from the title screen.
#Turbografx 16 cd bios for snesc upgrade
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). in 1992 and was similarly offered built-in with the Turbo Duo (the U.S. Games that required this BIOS, which are labelled Super CD-ROM² discs, will display an incompatibility notice when loaded on a prior System Card. Version 3.0 increases the amount of buffer RAM from 64kB to 256kB, hence the addition of the word Super. The later models of the Duo (Duo-R and Duo-RX) also have this BIOS built-in. 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 Version 3.0 BIOS was launched in Japan in 1991. Its only new feature was its ability to auto-detect disc changes. System Card Version 2.1, released in 1990 exclusively in Japan, was the first System Card that was sold as a stand-alone, intended to be a replacement for users who had their original System Cards lost or damaged. This can also be seen in most, if not all, games for the TurboGrafx-CD. For example, it can be found at 0x3FAE0 in US System Card v. Inside all of the system cards is the following message.
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