OBIO(4) | Device Drivers Manual (mac68k) | OBIO(4)

# NAME

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

# SYNOPSIS

`obio0 at mainbus?`

# 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.
ncrscsi
  NCR 5380 SCSI interface.

## Disk and tape controllers

iwm
  Integrated Woz Machine - Sony based floppy drives.
wdc
  Standard IDE/ATAPI type hard drive controllers.

## Network interfaces

mc
  Apple MACE ethernet interface.
sn
  Sonic (DP83932, DP83916) based ethernet interfaces.

## Serial interfaces

zsc
  Zilog 8530 serial communications interfaces.

## Audio devices

asc
  Apple Sound Chip as found on 68k based Macintosh computers.

## Miscellaneous devices

adb
  Apple Desktop Bus for keyboards, mice, and other input devices.
intvid
  Internal video hardware.

# SEE ALSO

adb(4), asc(4), esp(4), intvid(4), mac68k/autoconf(4), mac68k/intro(4), mac68k/iwm(4), mac68k/zsc(4), mc(4), ncrscsi(4), sn(4), wdc(4)

# HISTORY

`obio` first appeared in NetBSD 1.2.

February 17, 2017 | NetBSD 9.4