ReadMe32.txt----------------------------------------------------
32-bit DLL and Test Program
Contents:
o EXECUTE\CPUINF32.DLL -- 32-bit CPUINFO DLL
o EXECUTE\TSTDLL32.EXE -- Test Program for CPUINF32.DLL
o SOURCE\*.* -- Source Files for the DLLs, the
test programs, and the DOS
code
Installation:
Copy both the TSTDLL32.EXE file and the CPUINF32.DLL file to
the same directory. Execute the TSTDLL32.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
TSTDLL32 is a 32-bit MS-Windows* test program for the CPUINF32
DLL. TSTDLL32 requires at least an Intel386(TM) processor and
MS-Windows 3.1 with Win32s,Windows 95, or Windows NT. CPUINF32
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 CPUINF32 DLL uses the standard Intel cpuid assembly code.
To determine clock speed, the CPUINF32 DLL uses one of two
algorithms.
The first algorithm (for use on systems not supporting the
Time Stamp Register) uses the Win32 API call
QueryPerformanceCounter() 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) again utilizes QueryPerformanceCounter().
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
CPUINF32.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
CPUINF32.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 TSTDLL32.
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
CPUINF32.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 1000 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
are 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
cpuid32.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 winstampread() function in
CPUINF32.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
CPUINF32.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.
----------------------------------------------------ReadMe32.txt
Download Driver Pack
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From the Properties dialog box, select the Driver tab.
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