Teledyne LeCroy HPT - Users Manual - Manual (Page 17)

CATC HPT User’s Manual Version 2.27
Page 15
5.7 Configuration File Information
5.7.1 For Intel PIIX3 UHCI systems only
If the system under test has a BIOS that disables the USB portion of the Intel PIIX3 Host
Controller, the HPT software will enable it for the duration of the test, and then restore the
previous settings.
In order to run the test, the software needs certain information about the controller configuration:
the I/O base address for PIIX3 function 2 (USB portion), the IRQ assigned to the host controller,
and the USB Clock Selector (if host controller runs at 24 or 48 MHz).
In order to provide this input, a configuration text file (usb_hpt.cfg) is included with the HPT
software, containing two lines, as in the following example:
; I/O Space IRQ Clock
0xF300 11 48
This file should be used to provide input for the above cases. If the “.cfg” file is not present, the
program will use the default values as shown above (0xF300 11 48). For the clock input, only
two values are accepted: 24 and 48; any other values are ignored, and 48 used as a default. The
I/O base address should be entered in hexadecimal, IRQ as an integer.
The values in usb_hpt.cfg are used by the program only when the USB (Function 2 in PIIX3) is
disabled by the BIOS.
5.7.2 For Systems Running EMM386
Systems with an OHCI host controller that are utilizing EMM386, MUST specify the following
“RAM” option in their EMM386.exe statement:
Device=emm386.exe RAM X=d0000-d1000
For systems utilizing the UHCI host controller, the RAM option is not required.