ReadMe16.txt----------------------------------------------------
16-bit DLL and Test Program
Contents:
o EXECUTE\CPUINF16.DLL -- 16-bit CPUINFO DLL
o EXECUTE\TSTDLL16.EXE -- Test Program for CPUINF16.DLL
o SOURCE\*.* -- Source Files for the DLLs, the
test programs, and the DOS
code
Installation:
Copy both the TSTDLL16.EXE file and the CPUINF16.DLL file to
the same directory. Execute the TSTDLL16.EXE program.
The DLL does not have to be placed in the same directory, but
if it is not placed in the same directory that the program
is executed from, the DLL must be pointed to by the PATH.
Otherwise the Windows* will not know where to find the file.
OVERVIEW
TSTDLL16 is a 16-bit MS-Windows* test program for the CPUINF16
DLL. TSTDLL16 requires at least an Intel386(TM) processor and
MS-Windows 3.1. The CPUINF16 DLL contains functions to return
the family, type/family/model/stepping, feature flags,
processor speed, and time stamp reading of the host processor.
Note that some functions do not pertain to all systems. See
below for further information.
To determine what type of processor is in the computer,
the CPUINF16 DLL uses the standard Intel cpuid assembly code.
To determine clock speed, the CPUINF16 DLL uses one of two
algorithms.
The first algorithm (for use on systems not supporting the
Time Stamp Register) directly uses the PC Chipset Timer to
determine the amount of time taken to run a specified set of
instructions. The speed is then calculated based on the number
of cycles run and the number of microseconds it took to run
them. This algorithm is basically a very crude benchmark test.
The second algorithm (for use on systems which do support the
Time Stamp Register) utilizes the Windows API call
timeGetTime() in place of directly reading the PC Chipset
Timer. Instead of using a set number of instructions to
determine the number of cycles executed throughout the test,
this algorithm simply reads the Time Stamp at the beginning
and the end of the test to find how many cycles have passed.
Test Program Functionality
1. CPU Family - this tests the wincpuid() function in
CPUINF16.DLL, and returns the cpu Family (5-Pentium(R)
processor, 4-i486(TM) processor ...) as a hex number in a
windows message box.
2. CPU Extensions - this tests the wincpuidext() function in
CPUINF16.DLL, and returns the Processor Type/Family/
Model/Stepping as a hexidecimal number in a windows
message box. The processor T/F/M/S are a 16-bit quantity
returned in the AX register by the CPUID operation. If
CPUID is not supported, only the Family, in bits 11:8,
are displayed by TSTDLL16.
AX(15:14) = Reserved
AX(13:12) = Processor type
AX(11:8) = CPU Family
AX(7:4) = CPU Model(if CPUID supported)
AX(3:0) = Stepping #(if CPUID supported)
3. CPU Speed - this tests the cpuspeed() function in
CPUINF16.DLL, and returns a FREQ_INFO structure which
contains the calculated speed of the processor, the
normalized (to the nearest known processor speed) value
of the processor, and the number of clock cycles and
microseconds that elapsed during the test sampling. After
displaying this information, the user is asked whether
to proceed with the testing and run 100 more iterations
of the test. The results are then displayed
statistically. This statistical feedback is primarily for
the user to get information on the precision of the
cpuspeed() function. Note- Multiple sampling iterations
is done within cpuspeed() as well. In most cases,
multiple calls to cpuspeed will not increase the
accuracy of the data.If greater accuracy is necessary
simply adjust the constants in SPEED.H.
4. CPU Features - this tests the wincpufeatures() function in
cpuid16.DLL, and returns the Feature Flags as a
hexidecimal number in a windows message box. The Feature
Flags are a 32-bit quantity returned in the EDX register
by the CPUID operation.
5. Read Time Stamp - this tests the winrdtsc() function in
CPUINF16.DLL. The 64-bit Time Stamp register is currently
available only on Pentium(R) and Pentium Pro(R)
processors. All other processors will return all zeroes
for the time stamp value.
6. Get DLL Version - this tests the getdllversion() function in
CPUINF16.DLL. It returns an unsigned short. The upper byte
is the major version and the lower byte is the minor
version.
+----------------------------------------------------------+
| This program has been developed by Intel Corporation. |
| You have Intel's permission to incorporate this code |
| into your product, royalty free. Intel has various |
| intellectual property rights which it may assert under |
| certain circumstances, such as if another manufacturer's |
| processor mis-identifies itself as being "GenuineIntel" |
| when the CPUID instruction is executed. |
| |
| Intel specifically disclaims all warranties, express or |
| implied, and all liability, including consequential and |
| other indirect damages, for the use of this code, |
| including liability for infringement of any proprietary |
| rights, and including the warranties of merchantability |
| and fitness for a particular purpose. Intel does not |
| assume any responsibility for any errors which may |
| appear in this code nor any responsibility to update it. |
+----------------------------------------------------------+
Information in this document is provided in connection with
Intel products. Intel assumes no liability whatsoever,
including infringement of any patent or copyright, for sale
and use of Intel products except as provided in Intel's Terms
and Conditions of Sale for such products.
Intel retains the right to make changes to these specifications
at any time, without notice.
* Other brands and names are the property of their respective
owners.
Copyright (c) 1995, Intel Corporation. All rights reserved.
----------------------------------------------------ReadMe16.txt
Download Driver Pack
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Expand the archive file (if the download file is in zip or rar format).
If the expanded file has an .exe extension, double click it and follow the installation instructions.
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Find the device and model you want to update in the device list.
Double-click on it to open the Properties dialog box.
From the Properties dialog box, select the Driver tab.
Click the Update Driver button, then follow the instructions.
Very important: You must reboot your system to ensure that any driver updates have taken effect.
For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.