Jazz was the codename under which this family of systems was originally developed by Microsoft before it was sold off to MIPS Computer Systems, Inc. MIPS, Toshiba, Acer and various customers and licenses have developed a variety of architecturally very similar systems.
Most of these systems were running the ARC firmware and Windows NT. Some systems made by MIPS were reconfigurable to big endian; in big endian mode a different set of firmware and some UNIX flavor such as RISC/OS in case of MIPS was being used.
All Jazz computers are sharing the same "core" architecture codenamed RC4030 or MCTADR (after chipset).
RC4030 DMA controller.
RC4030 IRQ controller. See Linux_Interrupts page.
Some Jazz models are using additional i8259 (PC-style IRQ) and i8257A (PC-style DMA) controllers to support ISA/EISA bus IRQ/DMA.
ACER PICA-61,Olivetti M700-10, MIPS Magnum 4000 and MIPS Millenium are based on the NCR 53C90 also known as QLogic ESP216 or ASC, Advanced SCSI Controller.
ACER PICA-61,Olivetti M700-10, MIPS Magnum 4000 and MIPS Millenium are using a SONIC Ethernet chip.
ACER PICA-61 is using S3 968 SVGA videocard with 2MB of video memory on the custom fast PICA bus. The video card looks like an EISA card but the notch is on the wrong side.
NEC Evolution is using Cirrus Logic based video.
Microsoft/MIPS Magnum 4000 is using simply sound controller (codename Jazz) : 2xDMA for left and right channel.
Olivetti M700-10 is using AD1815-based sound controller (?need to check)
All Jazz computers are using PC-style i8042 keyboard and PS/2 mouse controller, i8072 floppy controller (attached to the RC4030 DMA and IRQ), 2x16450 RS-232 serial ports and PC-style LPT.
All Jazz family systems come with an ARC firmware.
Linux/MIPS supports the Olivetti M700-10 almost since birth. Support is supposed to be stable in 2.2 and in various stages of bitrot after that. As of Linux 2.6 resurrection of support is being worked on. Not test results on other Jazz family systems are available.