with an instruction manual, control pad, stereo AV cable, and 100 V AC power supply, with a power consumption of approximately 15 W. The Saturn had technically impressive hardware at the time of its release, but its complexity made harnessing this power difficult for developers accustomed to conventional programming. The greatest disadvantage was that both CPUs shared the same bus and were unable to access system memory at the same time. Making full use of the 4 KB of cache memory in each CPU was critical to maintaining performance. For example, Virtua Fighter used one CPU for each character, while Nights used one CPU for 3D environments and the other for 2D objects. The Visual Display Processor 2 (VDP2), which can generate and manipulate backgrounds, has also been cited as one of the system's most important features. The Saturn's design elicited mixed commentary among game developers and journalists. Developers quoted by Next Generation in December 1995 described the Saturn as "a real coder's machine" for "those who love to get their teeth into assembly and really hack the hardware", with "more flexibility" and "more calculating power than the PlayStation". The sound board was also widely praised. By contrast, Lobotomy Software programmer Ezra Dreisbach described the Saturn as significantly slower than the PlayStation, whereas Kenji Eno of WARP observed little difference. In particular, Dreisbach criticized the Saturn's use of quadrilaterals as its basic geometric primitive, in contrast to the triangles rendered by the PlayStation and the Nintendo 64. Ken Humphries of Time Warner Interactive remarked that compared to the PlayStation, the Saturn was worse at generating polygons but better at sprites. Third-party development was initially hindered by the lack of useful software libraries and development tools, requiring developers to write in assembly language. During early Saturn development, programming in assembly could offer a two-to-fivefold speed increase over higher-level languages such as C. The Saturn hardware is extremely difficult to emulate. Sega responded to complaints about the difficulty of programming for the Saturn by writing new graphics libraries which were claimed to make development easier. Sega of America also purchased a United Kingdom-based development firm, Cross Products, to produce the Saturn's development system. Despite these challenges, Treasure CEO Masato Maegawa stated that the Nintendo 64 was more difficult to develop for than the Saturn. Traveller's Tales founder Jon Burton felt that while the PlayStation was easier "to get started on ... you