INTRO(4)

NAME
intro - introduction to special files and hardware support

DESCRIPTION
The manual pages in section 4 describe the special files, related driver functions, and networking support available in the system. In this part of the manual, the SYNOPSIS section of each configurable device gives a sample specification for use in constructing a system description for the config(8) program. The DIAGNOSTICS section lists messages which may appear on the console and/or in the system error log /var/log/messages due to errors in device operation; see syslogd(8) for more information.

This section contains both devices which may be configured into the system and network related information. The networking support is introduced in netintro(4).

DEVICE SUPPORT
This section describes the hardware supported on the sgi platform. Software support for these devices comes in two forms. A hardware device may be supported with a character or block device driver, or it may be used within the networking subsystem and have a network interface driver. Block and character devices are accessed through files in the file system of a special type; see mknod(8). Network interfaces are indirectly accessed through the interprocess communication facilities provided by the system; see socket(2).

A hardware device is identified to the system at configuration time and the appropriate device or network interface driver is then compiled into the system. When the resultant system is booted, the autoconfiguration facilities in the system probe for the device and, if found, enable the software support for it. If a device does not respond at autoconfiguration time it is not accessible at any time afterwards. To enable a device which did not autoconfigure, the system must be rebooted.

The autoconfiguration system is described in autoconf(4). A list of the supported devices is given below.

HARDWARE
The following systems are supported:
Hardware | Family | Kernel | Model
IP20 | IP20 | IP22 | Indigo (R4k)
IP22 | IP22 | IP22 | Indigo2, Challenge M (R4k)
IP24 | IP22 | IP22 | Indy, Challenge S
IP26 | IP22 | IP26 | POWER Indigo2 (R8000)
IP27 | IP27 | IP27 | Origin 2x00, Onyx 2
IP28 | IP22 | IP28 | POWER Indigo2 (R10000)
IP29 | IP27 | IP27 | Origin 200
IP30 | IP30 | IP30 | Octane, Octane 2 (Speedracer)
IP31 | IP27 | IP27 | Origin 200/2x00, Onyx 2 (250+ MHz)
IP32 | IP32 | IP32 | O2, O2+ (Moosehead)
IP34 | IP35 | IP27 | Fuel (Asterix)
IP35 | IP35 | IP27 | Origin 3x00, Onyx 3x000, Onyx 3
IP39 | IP35 | IP27 | Onyx 4
IP45 | IP35 | IP27 | Origin 300, Onyx 300
IP53 | IP35 | IP27 | Origin 350, Onyx 350, Tezro
IP59 | IP35 | IP27 | Origin 350, Onyx 350, Tezro (1GHz)

LIST OF DEVICES
The devices listed below are supported in this incarnation of the system. Not all supported devices are listed.

gbe(4)
    SGI Graphics Back End (GBE) frame buffer
ioc(4)
    IOC3 generic workstation I/O device
iof(4)
    IOC4 generic workstation I/O device
macebus(4)
    Multimedia, Audio and Communications Engine I/O ASIC
mainbus(4)
    SGI main processor bus device
mavb(4)
    Moosehead A/V Board audio device
mec(4)
    MAC-110 10/100 Ethernet device
power(4)
    power button

A further list of available devices is contained within the pages describing the system buses and controllers. For example, a PCI device would be listed in the pci(4) man page. The following buses and controllers list these devices:

gio(4)
    Graphics I/O GIO bus
pci(4)
    introduction to PCI bus support
usb(4)
    introduction to Universal Serial Bus support
xbow(4)
    Octane and Origin family XIO bus

SEE ALSO
autoconf(4), config(8)

HISTORY
This sgi intro appeared in OpenBSD 3.6.