Difference between revisions of "IP32"
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Revision as of 06:53, 8 October 2010
The O2 Workstation is based around the CRIME, MACE, VICE, and GBE ASICs. CRIME ASIC is the main system ASIC which interfaces the MIPS cpu, memory system and the I/O system in the MACE ASIC. CRIME ASIC also contains the 3D gfx rendering engine which renders to main system memory -- part of which is used as the frame buffer which is DMA'ed to a video connector using the GBE ASIC. A MACE chip is used to provide legacy device support (serial, parallel, video, RTC...). VICE ASIC is used to process video streams and images stored in memory.
Currently supported devices include:
- PS/2 keyboard and mouse
- Framebuffer, see GBE for more information
- Serial ports
- Parallel port
- Audio in/out, since Alsa 1.0.17
- SCSI (Adaptec 7880) and booting from a hard drive works using arcboot or ARCLoad.
- Integrated 10/100 Base-T ethernet
- PCI slot (Some USB cards are known to work ok)
Some experimental work has been done on the VICE engine.
The combination of R1x000 speculative execution feature and lack of hardware cache coherency in IP32, causes problems that need special workarounds in kernel (and also possibly GCC). The kernel portion has not been achieved yet. Discussion of the R10k issue (TODO: write up in more detail here)