Changeset 91

Timestamp:

Apr 30, 2011, 10:20:36 PM (14 years ago)

Author:

chris

Message:

• updated README

File:

• trunk/src/os2ahci/README (modified) (3 diffs)

trunk/src/os2ahci/README

@@ -7 +7 @@
 ============
 
-OS2AHCI is an AHCI driver for eComStation and OS/2 3.x or later. It
-supports both ATA and ATAPI devices in a single driver, thus there's
-no need for an ATAPI/CDROM filter driver.
+OS2AHCI is an AHCI driver for eComStation. It supports both ATA and
+ATAPI devices in a single driver, thus there's no need for an
+ATAPI/CDROM filter driver.
 
 
@@ -23 +23 @@
 those parts are (c) Linux AHCI/ATA maintainers
 
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
-
-  This program is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program; if not, write to the Free Software
-  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ MA  02111-1307  USA
+
+
+Licensing and Source Code
+=========================
+
+The *binary* delivery of OS2AHCI.ADD as obtained from ecomstation.nl,
+or as part of packaged eComStation releases, is licensed to run with
+eComStation, only.
+
+The source code can be retrieved from http://svn.ecomstation.nl;
+in compliance to the GNU General Public License, the source code
+can of course be modified/compiled to run on other products as long
+as modifications will also be published as outlined in the GNU GPL2.
+
+The toolchain required for compilation consists of:
+
+ - Microsoft C600
+ - Microsoft Assembler (MASM)
+ - IBM OS/2 DDK for Warp 3 or later
 
 
@@ -119 +139 @@
 
 
+Native Command Queuing
+======================
+
+Native Command Queuing (NCQ) is a feature which allows sending multiple I/O
+requests to hard disks before waiting for any of the requests to complete,
+much like Tagged Command Queuing for SCSI devices. This allows the disks
+to reorder I/O requests to minimize head movements, resulting in improved
+performance when executing random I/Os. In practice, this will be most
+noticable when multiple programs request I/O services to different parts
+of the disk -- a single program typically won't queue up I/O's but instead
+will wait for each I/O to complete (with the exception of programs like
+database servers).
+
+While we believe NCQ will work with the majority of controllers and hard
+disks, it's currently turned off by default until we have more feedback
+from eComStation users. In order to turn on NCQ, just add the command line
+option "/n" to OS2AHCI.ADD.
+
+
 Interoperability With IDE Drivers
 =================================