Copyright and Trademark Information

ADSCSI.CPX and this documentation are copyright 1991 by ICD, 
Inc.  All rights reserved.  These files are authorized for 
distribution only to owners of ICD's STHA, Advantage, and 
AdSCSI host adapters directly on disk from ICD, Inc. or 
electronically from our BBS, GEnie, or CompuServe.  No other 
distribution is authorized.  AdSCSI is a trademark of ICD, 
Inc.  Other product names mentioned may be registered 
trademarks or trademarks of their holders.

Introduction

Atari's new extensible control panel XCONTROL offers a new 
level of flexibility to ST owners.  It is no longer 
necessary to have a separate desk accessory for each 
hardware or software feature.  With ADSCSI.CPX, ICD adds 
several host adapter control and information features to 
XCONTROL.

ADSCSI.CPX and ADSPEED.CPX (for ICD's AdSpeed ST 
accelerator) are the first, to our knowledge, third party 
extensions to Atari's new XCONTROL extensible control panel.  
At this time, this control panel is included with Mega STe and 
TT computers and available on GEnie and CompuServe.  The new 
control panel does not require the new versions of TOS in these
computers to operate and will work fine on existing ST systems.

Installation

Simply copy the file ADSCSI.CPX to the directory containing 
the rest of your *.CPX files.  For details on XCONTROL and 
CPX installation, consult Atari's documentation.

Use

To access ADSCSI.CPX, open your control panel and scroll if 
necessary until you see the AdSCSI Options entry.  Double 
click on this entry to bring up the ADSCSI.CPX main window.

The main window for ADSCSI.CPX contains four sections: 
Options, Information, Sense Codes, and Relog HDs.

The Options section allows you to enable or disable the 
AdSCSI Hard Disk Handler write cache and enable and disable 
write verify.  The buttons beside these options display the 
current status (On or Off).  To change the status of either 
of these features, click on the button, then click on your 
choice.  Any changes made will not take effect until you 
close the window or click on OK.

Clicking on OK or the window's close button or hitting the 
RETURN key will put into effect any changes made in the 
Options section.  Clicking on Cancel will quit ADSCSI.CPX 
without making any changes.

Clicking on the Information box will bring up another window 
giving information about the hard disk driver.  There is 
more information available than will fit in the window.  To 
see more, use the slider bar or click on the up or down 
arrows.

The following information is available in the Information 
window:

ICDBOOT Version.  This is the version of the ICD Hard Disk 
Handler currently running in the system.

Folders Allocated.  This is the number of extra folders 
allocated by the hard disk handler.  This number is set with 
HDUTIL.PRG.

Max Sector Size.  This is the maximum sector size the driver 
is configured for.  This is either the value saved in the 
hard disk driver by HDUTIL.PRG or the largest sector size of 
any partition in the system at boot, whichever is greater.

Cache Read Hits.  This number is the percentage of sector 
reads attempted by the operating system that were read from 
the cache rather than from the drive.  This number will 
always be less than 100%, since some reads must come from 
the drive.

Cache Write Hits.  This number is the percentage of sector 
writes attempted by the operating system where the sector 
was in the cache.  Unlike Cache Read Hits, this number is 
not a clear indication of write cache effectiveness.  
Further improvement of system performance is provided by the 
write cache saving writes until periods of disk inactivity.  
But any number seems to be better than none.

To exit the Information display, click on OK or the window's 
close button.

The Sense Codes section shows a list of common sense codes 
and their definitions.  Since there is no sense code 
standard, and these numbers do come from the drive's 
controller, it is possible that these definitions will not 
hold for your system.  As with the information display, 
there is more information available than will fit in the 
window.  Click on the up and down arrows or use the scroll 
bar to see the whole display.

Clicking on Relog HDs will cause the driver to check all 
enabled IDs for hard drives.  This button is useful if you 
have a removable media drive that was not ready (no 
cartridge installed) when the computer booted.  Just insert 
a cartridge, wait until the drive is ready, then click on 
Relog HDs.