5 ms·

It's also really lucky that the Gamecube GPU, released well over 10 years ago, matches extremely well to the modern GPU pipeline. Compare this with the PS2, wh

by Jasper_ 13y ago

It's also really lucky that the Gamecube GPU, released well over 10 years ago, matches extremely well to the modern GPU pipeline. Compare this with the PS2, which has a bunch of crazy programmable coprocessors to build an extremely flexible but hard-to-emulate system. It's probably no coincidence, given that it was developed by ex-SGI engineers who founded their own company, ArtX, who got bought out by ATI to develop the R300, one of the first modern programmable GPUs.

malkia 13y ago
The PS2 had an unseen graphics VRAM speed (48 GB/s), and that's why it's hard to emulate it on PS3, and maybe even PS4 (early PS3 simply included PS2 in there).
- jerf 13y ago
  As far as I know, all reverse compatibility at initial release that any console has ever had is by virtue of either the new console being "just" the old console with some more hardware bolted on and higher clock speeds, allowing the new hardware to be the old hardware just by turning the new features off and slowing the clock, or by simply physically including the entire previous console in the new one. I don't know of anything that ever did it by emulation. Maybe something back in the first couple of generations. I post this partially so someone will correct me, because I'm interested in the correction.
  - ggreer 13y ago
    The Xbox 360 is a different architecture (tri-core PowerPC vs single core x86), but it emulates the majority of Xbox games. There are bugs, but Microsoft fixed most of the issues with popular games.
    - malkia 13y ago
      I never owned an Xbox, but I always thought that it was matter of recompiling (Xbox games to PPC) and re-releasing. I could be wrong....
  - deleted 13y ago
    [deleted]
  - TazeTSchnitzel 13y ago
    While the Nintendo DS contained the CPU the GBA did, the Nintendo 3DS does not contain the DS's CPU. I assume that's either because, as they're both ARM chips, the instruction set is backwards-compatible, or that there's actually emulation happening.
    - nemeth88 13y ago
      The 3DS downclocks the ARM CPU and disables its second core when playing a NDS game. As a side effect, battery life is better when playing DS games on a 3DS than when playing native 3DS games on the same 3DS. The 3DS processor is capable of emulating 8-bit systems, as it has virtual console NES and GB/GBC games. SEGA also ported some Genesis games to run on the 3DS, but I think they had to re-write parts in native ARM code as straight emulation wasn't fast enough (Google "Sega M2 GigaDrive" for a great series of interviews about this).
  - jevinskie 13y ago
    Some PS3s shipped with hybrid SW/HW emulation where, IIRC, the PS2 CPU was emulated by the Cell processor and the PS2 GPU hardware was included.
- AgathaTheWitch 13y ago
  Wow, I didn't know this. I was so annoyed when the slim got rid of backwards compatibility but it makes more sense now. It's easy to underestimate the complexity of emulating older systems I guess.

by Jasper_ 13y ago

malkia 13y ago

The PS2 had an unseen graphics VRAM speed (48 GB/s), and that's why it's hard to emulate it on PS3, and maybe even PS4 (early PS3 simply included PS2 in there).

jerf 13y ago
As far as I know, all reverse compatibility at initial release that any console has ever had is by virtue of either the new console being "just" the old console with some more hardware bolted on and higher clock speeds, allowing the new hardware to be the old hardware just by turning the new features off and slowing the clock, or by simply physically including the entire previous console in the new one. I don't know of anything that ever did it by emulation. Maybe something back in the first couple of generations. I post this partially so someone will correct me, because I'm interested in the correction.
- ggreer 13y ago
  The Xbox 360 is a different architecture (tri-core PowerPC vs single core x86), but it emulates the majority of Xbox games. There are bugs, but Microsoft fixed most of the issues with popular games.
  - malkia 13y ago
    I never owned an Xbox, but I always thought that it was matter of recompiling (Xbox games to PPC) and re-releasing. I could be wrong....
- deleted 13y ago
  [deleted]
- TazeTSchnitzel 13y ago
  While the Nintendo DS contained the CPU the GBA did, the Nintendo 3DS does not contain the DS's CPU. I assume that's either because, as they're both ARM chips, the instruction set is backwards-compatible, or that there's actually emulation happening.
  - nemeth88 13y ago
    The 3DS downclocks the ARM CPU and disables its second core when playing a NDS game. As a side effect, battery life is better when playing DS games on a 3DS than when playing native 3DS games on the same 3DS. The 3DS processor is capable of emulating 8-bit systems, as it has virtual console NES and GB/GBC games. SEGA also ported some Genesis games to run on the 3DS, but I think they had to re-write parts in native ARM code as straight emulation wasn't fast enough (Google "Sega M2 GigaDrive" for a great series of interviews about this).
- jevinskie 13y ago
  Some PS3s shipped with hybrid SW/HW emulation where, IIRC, the PS2 CPU was emulated by the Cell processor and the PS2 GPU hardware was included.
AgathaTheWitch 13y ago
Wow, I didn't know this. I was so annoyed when the slim got rid of backwards compatibility but it makes more sense now. It's easy to underestimate the complexity of emulating older systems I guess.