August 24, 2003 INTRO 4 dreamcast

### NAME

intro - introduction to dreamcast special files and hardware support

### DESCRIPTION

This section describes 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(1) 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 Dreamcast platform. Software support for these devices come 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.

### LIST OF DEVICES

The devices listed below are supported in this incarnation of the system. Devices are indicated by their functional interface. Not all supported devices are listed.

Standard builtin devices:

g2bus
  ``G2'' internal I/O bus
gapspci
  PCI bridge used in expansion port peripherals
gdrom
  Builtin GD-ROM optical disc drive
pvr
  Framebuffer device using the builtin NEC PVR graphics subsystem
aica
  Builtin AICA sound system

Controller port peripherals are supported though the maple(4) bus and associated device drivers.

Network interfaces:

rtk
  Ethernet driver for the HIT-0400 Broadband Adapter
mbe
  Ethernet driver for the HIT-0300 LAN Adapter

### SEE ALSO

config(1), autoconf(4), netintro(4)

### HISTORY

The intro man page appeared in NetBSD2.0.