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Added VLB to the list of PC busses supported since this question comes up

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often on USENET.

Added comments regarding the new 'extended IDE' controllers, which work with
FreeBSD but do not use the extended features.

Minor formatting changes.
This commit is contained in:
Nate Williams 1994-11-13 09:19:04 +00:00
parent 1ab772898b
commit e369a78c55
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=4433
1 changed files with 19 additions and 16 deletions
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35
share/FAQ/RELNOTES.FreeBSD
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@ -245,10 +245,11 @@ Sources involved: sys/i386/ibcs2/* + misc kernel changes.
2. Supported Configurations
---------------------------
FreeBSD currently runs on a wide variety of ISA, EISA and PCI bus based
PC's, ranging from 386sx to Pentium class machines (though the 386sx is
not recommended). Support for generic IDE or ESDI drive configurations,
various SCSI controller, network and serial cards is also provided.
FreeBSD currently runs on a wide variety of ISA, VLB, EISA and PCI bus
based PC's, ranging from 386sx to Pentium class machines (though the
386sx is not recommended). Support for generic IDE or ESDI drive
configurations, various SCSI controller, network and serial cards is
also provided.
Following is a list of all currently known disk controllers and
ethernet cards known to work with FreeBSD. Other configurations may
@ -260,6 +261,8 @@ this.
WD1003 (any generic MFM/RLL)
WD1007 (any generic IDE/ESDI)
[Note: the new Extended IDE controllers in newer PC's work, although no
extended features are used.]
Adaptec 152x series ISA SCSI controllers
Adaptec 154x series ISA SCSI controllers
@ -281,22 +284,22 @@ Seagate ST01/02 SCSI controllers.
Future Domain 8xx/950 series SCSI controllers.
With all supported SCSI controllers, full support is provided for
SCSI-I & SCSI-II peripherals, including Disks, tape drives (including
DAT) and CD ROM drives. Note: This and the mcd driver (Mitsumi CDROM
interface card) is the only way a CD ROM drive may be currently
attached to a FreeBSD system; we do not support SoundBlaster (non-SCSI)
CDROM interface, or other "non-SCSI" adapters. The ProAudio Spectrum
SCSI and SoundBlaster SCSI controllers are supported.
With all supported SCSI controllers, full support is provided for SCSI-I
& SCSI-II peripherals, including Disks, tape drives (including DAT) and
CD ROM drives. Note: This and the mcd driver (Mitsumi CDROM interface
card) is the only way a CD ROM drive may be currently attached to a
FreeBSD system; we do not support SoundBlaster (non-SCSI) CDROM
interface, or other "non-SCSI" adapters. The ProAudio Spectrum SCSI and
SoundBlaster SCSI controllers are supported.
Some controllers have limitations with the way they deal with >16MB of
memory, due to the fact that the ISA bus only has a DMA address space
of 24 bits. If you do your arithmetic, you'll see that this makes it
memory, due to the fact that the ISA bus only has a DMA address space of
24 bits. If you do your arithmetic, you'll see that this makes it
impossible to do direct DMA to any address >16MB. This limitation is
even true of some EISA controllers (which are normally 32 bit) when
they're configured to emulate an ISA card, which they then do in *all*
respects. This problem is avoided entirely by IDE controllers (which
do not use DMA), true EISA controllers (like the UltraStor or Adaptec
respects. This problem is avoided entirely by IDE controllers (which do
not use DMA), true EISA controllers (like the UltraStor or Adaptec
1742A) and most VLB (local bus) controllers. In the cases where it's
necessary, the system will use "bounce buffers" to talk to the
controller so that you can still use more than 16Mb of memory without
@ -505,4 +508,4 @@ hope you enjoy this release of FreeBSD!
The FreeBSD Core Team
$Id: RELNOTES.FreeBSD,v 1.8 1994/11/10 04:11:58 jkh Exp $
$Id: RELNOTES.FreeBSD,v 1.9 1994/11/11 07:39:40 jkh Exp $