The Yaroze's primary RAM was the same as the consumer's model (2 megabytes). Game code, graphics, audio samples and run-time libraries were limited to fit in the 2 MB of primary RAM, 1 MB of VRAM, and 0.5 MB of sound RAM, since the Net Yaroze will not play user-burned CDs, a necessary restriction in order to prevent piracy and ensure that the Yaroze program would not compete with the PlayStation's professional software development kit. This however, was not a problem for licensed developers who owned the official SDK. There are many commercial PlayStation titles (such as "Devil Dice", originally a Net Yaroze game) that can be entirely RAM-resident, and have been developed with the Net Yaroze, while using the CD strictly to spool Red Book audio (CD-DA).