Technical information

© Jean Louis-Guérin – V1.2a – September 2014 Page 27 / 69
4.6.3 Configuring the AdSCSI Hard Disk Driver
Run the ICD utility program HDUTIL.PRG. This brings you to the main menu.
Click Config: All parameters are grayed because you first have to select the driver you want to
configure. Select the driver from your boot partition (for example C:\ICDBOOT.SYS). You should see
all the current parameters of the driver
installed. You probably do not want to
change any of these parameters with
the following exceptions:
 Max size for logical sector: If you
are using removable media (e.g. SD
cards on an UltraSatan) you must
adjust the size for logical sector with
the value that was reported at the
end of the partitioning operation.
This is done by pressing the
up/down arrow buttons at the
beginning of the line. See 4.2.2
 Set Clock: you have to select NO for
the clock option unless you are
using AdSCSI Plus ICD board.
Click Save: The program displays a file
selector: select save to
C:\ICDBOOT.SYS. Now click the Exit
button to terminate the configuration.
The program returns to the main screen and you can now click on QUIT.
A new window will pop up to remind you that ICDBOOT.SYS has been modified and offer you to
reboot the computer: click OK.
 Note: The maximum size for logical sector is an important parameter as it reserves buffers
required by the driver. If you are using several SD cards this parameter should set to the
maximum of the values reported during formatting of all the partitions on all the cards. See also
section 4.2.2
There are some other parameters that can be changed and that will affect the performance of the
driver but they are beyond the scope of this document and therefore not described. Please refer to the
ICD documentation for more information.
4.6.4 Removable Medium Drive Support
The ICDBOOT driver supports removable medium drives. When the card is changed, the driver
recognizes this the next time the drive is accessed, a “Disk Change” message is flashed in the upper
right-hand corner of the screen, and the drive is logged again. If the new card has more partitions than
the previous, these are added after the currently logged partitions. However it is not possible to
reserve a number of partitions attached to a drive.
4.6.5 Accessing DOS Partitions with ICD
The AdSCSI hard disk driver only supports DOS partitions of type FAT16A. Remember that these
partitions are limited to 32MB. AdSCSI Hard disk driver does not support XHDI 1.2 and
consequently the BigDOS program cannot be used with this driver. Note that this is strange as ICD
advertise XHDI 1.2 and BigDOS support here.
4.6.6 Accessing TOS&DOS Partitions
ICD AdSCSI does NOT support TOS&DOS partitions.
 Important Warning: Never try to access TOS&DOS partition with the ICD AdSCSI hard disk
driver. You will get invalid data returned and you will probably corrupt the accessed partition.