NEC PC-9801/9821 series with almost all i386-compatible processors, including 80386, 80486, Pentium, Pentium Pro, Pentium II, and variants. All i386-compatible processors by AMD, Cyrix, IBM, and IDT are also supported. NEC FC-9801/9821 series, and NEC SV-98 series (both of them are compatible with PC-9801/9821 series) should be supported. EPSON PC-386/486/586 series, which are compatible with NEC PC-9801 series are supported. High-resolution mode is not supported. NEC PC-98XA/XL/RL/XL^2, and NEC PC-H98 series are supported in normal (PC-9801 compatible) mode only. Although there are some multi-processor systems (such as Rs20/B20), SMP-related features of &os; are not supported yet. PC-9801/9821 standard bus (called C-Bus), PC-9801NOTE expansion bus (110pin), and PCI bus are supported. New Extend Standard Architecture (NESA) bus (used in PC-H98, SV-H98, and FC-H98 series) is not supported.