OBIO(4) | Device Drivers Manual (macppc) | OBIO(4)

# NAME

`obio` —
introduction to Macintosh On-Board IO bus support and drivers

# SYNOPSIS

`obio0 at pci? dev ? function ?`

# DESCRIPTION

The `obio` interface serves as an abstraction used by the autoconfiguration system to help find and attach devices (e.g. the Ethernet or disk controllers) connected to the Macintosh onboard I/O bus.

# HARDWARE

NetBSD includes machine-dependent On-Board drivers, sorted by device type and driver name:

## SCSI interfaces

esp
  NCR 53C9x SCSI interfaces.
mesh
  Apple Macintosh Enhanced SCSI Hardware SCSI interfaces.

## Disk and tape controllers

wdc
  Standard IDE/ATAPI type hard drive controllers.
mediabay
  Standard IDE/ATAPI type CD-ROM drive controllers in PowerBooks.

## Network interfaces

bm
  Apple BMac ethernet interface.
mc
  Apple MACE ethernet interface.
gem
  GMAC ethernet interface.
wi
  WaveLAN/IEEE and PRISM-II 802.11 wireless interfaces.

## Serial interfaces

zsc
  Zilog 8530 serial communications interfaces.

## Audio devices

awacs
  Apple's ‘audio waveform amplifier and converter for sound’ audio device found on most macppc models.

## Miscellaneous devices

adb
  Apple Desktop Bus for keyboards, mice, and other input devices.
nvram
  Placeholder device for the persistent system settings.

# SEE ALSO

adb(4), esp(4), gem(4), macppc/autoconf(4), macppc/awacs(4), macppc/bm(4), macppc/intro(4), macppc/mesh(4), mc(4), wdc(4), wi(4), zsc(4)

# HISTORY

`obio` first appeared in NetBSD 1.2.

March 30, 2018 | NetBSD 9.3