.\"	$NetBSD: hardware,v 1.25 2015/05/19 19:30:28 snj Exp $
.
.Nx*M
\*V runs on several of the older Macintosh computers.
About 4 MB of RAM is sufficient to boot a stripped-down custom kernel, and a
subset of the system can be squeezed onto a 40 MB hard disk with considerable
creativity and persistence. However, 140 MB of disk should be considered a
practical minimum, and to do anything more interesting than booting at least
8 MB of RAM and more disk space is recommended.
.Pp
Please note that to install
.Nx*M
\*V using the
.Ic sysinst
method, your system must have a minimum of 6 MB of RAM and 60 MB of
available disk space (i.e. not part of an in-use HFS partition).
.
.Ss2 Supported models
.(bullet -compact -offset indent
Mac II, IIx, IIcx, SE/30, IIci, IIsi, IIvx, IIvi
.It
Performa 400/405/410/430, Performa 450, Performa 460/466/467
.It
Performa 520, Performa 550/560, Performa 600/600CD
.It
LC II, LC III, LC III+, LC 520, LC 550
.It
MacTV
.It
Classic II, Color Classic
.It
Centris 650
.It
Quadra 610, Quadra 630, Quadra 650, Quadra 700, Quadra 800
.It
Quadra/Centris 660AV, Quadra 840AV
.It
PowerBook 140, PowerBook 145/145B, PowerBook 170
.It
PowerBook 160, PowerBook 165, PowerBook 180
.It
PowerBook 165c, PowerBook 180c, PowerBook 550c
.bullet)
.
.Ss2 Supported devices
.(bullet -compact -offset indent
Onboard SCSI bus and most SCSI tapes, hard drives, and CD-ROMs
.It
Internal sound \(em enough to beep on some machines, anyway
.It
Most basic NuBus video cards (there have been some
problems with some 24-bit color cards and with most
QuickDraw accelerators)
.It
Both internal serial ports
.It
ADB keyboards and mice (both Apple and a number of third party
multi-button mice and trackballs are supported)
.It
Ethernet cards based on the National Semiconductor 8390 and the
SONIC (DP83932) chips
(Asante, Apple, and a few others \(em problems still
with Ethernet and many NuBus video cards)
.It
Ethernet cards based on the SMC 91c92 and 91c100 (FEAST) chips.
This includes the AsanteFAST 10/100 cards
.It
Onboard Ethernet based on the SONIC chip for Quadra-series Macs
.It
Onboard Ethernet based on the MACE (Am79C940) chip for the Quadra
AV-series Macs
.It
Ethernet port on Asante NetDock and Newer Ether MicroDock,
for PowerBook Duo series
.It
Comm-slot Ethernet should be working for most machines/cards
.bullet)
.Pp
If your 68030 system is not listed above, it may be because of a problem
with accessing onboard video, and it may still work with a serial console.
Some of the known ones in this category:
.(bullet -compact -offset indent
Mac Classic series
.It
PowerBook Duo series
.bullet)
.Pp
If your 68LC040 system is not listed above, it is due to a problem with
floating point emulation (FPE) for this type of processor. Machines in
this category include:
.(bullet -compact -offset indent
Newer LC-series machines (47x, 57x)
.It
Newer Performa-series machines (47x, 57x, 58x, 63x, 640)
.It
Some PowerBook 500-series Macs
.bullet)
.
.Ss2 Unsupported models
.(bullet -offset indent
Macintosh IIfx
.Pp
This machine has unusual custom chips for the ADB and serial interfaces
which make support for it difficult. Work is in progress on this, though.
.It
Quadra 900/950
.Pp
These machines have I/O processor chips for their ADB interfaces similar to
those used in the IIfx and thus face similar support problems. Note that you
can use a serial console on these systems.
.It
PowerPC-based Macs
.Pp
This is a separate effort from the \*M port. PowerMacs use hardware that
is quite different from that of the \*M port.  See the
.Nx Ns /macppc
port webpage at
.Lk http://www.NetBSD.org/ports/macppc/
for more information.
.bullet)
.
.Ss2 Known hardware issues with this release
.(bullet -offset indent
Real Time Clock
.Pp
Due to oddities of the Macintosh hardware interrupt priority scheme,
.Nx*M
keeps very poor time. Under a high interrupt load (e.g.
SCSI or serial port activity), a machine can lose several minutes
per hour. A consequence of this problem is that attempting to run
.Ic ntpd
is generally rather pointless.
.It
SCSI difficulties
.Pp
The
.Nx*M
SCSI drivers are not quite as
robust as their
.Tn Mac OS
counterparts. Symptoms of these
problems are that some SCSI disks will not work under
NetBSD that work fine under
.Tn Mac OS .
Other problems include
occasional file system corruption with some types of drives
and the general unreliability of removable SCSI media.
Keep in mind that there are no clear patterns with these
problems, and they do not appear to affect the majority of
users.
.bullet)