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CYRIX.TXT
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1997-08-05
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Negate-Lock-Pin (registered version only!)
===============
On machines equipped with Cyrix/TI/IBM CPUs the state of the Negate-Lock
pin can be enabled. With this set, previously noncachable locked cycles
are executed as unlocked cycles and therefore, may be cached. This
results in higher performance. You may estimate a speed increase of up to
10% on machines without L2 cache as laptops and up to 5% with 256 PB
cache.
To enable this, start PC-CONFIG from command-line: config nolock
To disable type: config nolockoff
Testresults:
============
Below you find testresults made with the 3 popular windows-benchmarks
Wintach V1.2, Speedy V1.1 and ZD Winbench 96.
Larger values mean faster speed.
Machine 1: Cyrix P150+, Intel 430VX, 32 MB FPM RAM, 512k PB-Cache,
S3 968 VGA 2 MB, Windows 95, resolution 1280x1024x256
NOLOCK not set NOLOCK set increase
========================================================================
ZD Graf.Winmark96 23.3 24.7 6.0%
Speedy 344 352 2.3%
Wintach Wordp. 112 113 0.9%
Wintach CAD 459 525 14.4%
Wintach Calc 191 203 6.3%
Wintach Paint 179 194 8.4%
========================================================================
average 6.4%
Machine 2: Cyrix P150+, Intel 430VX, 32 MB FPM RAM, 0k L2-Cache,
S3 968 VGA 2 MB, Windows 95, resolution 1280x1024x256
NOLOCK not set NOLOCK set increase
========================================================================
ZD Graf.Winmark96 17.6 19.4 10.2%
Speedy 253 264 4.3%
Wintach Wordp. 87 90 3.4%
Wintach CAD 386 459 18.9%
Wintach Calc 156 159 1.9%
Wintach Paint 156 167 7.1%
========================================================================
average 7.6%
Machine 3: TI 486DX/4-100, UMC 8881, 8 MB FPM RAM, 0k L2-Cache,
Trident 9680 VGA 1 MB, Windows 95, resolution 1024x768x256
NOLOCK not set NOLOCK set increase
========================================================================
Speedy 48.6 50.2 3.3%
Wintach Wordp. 28.1 28.2 0.4%
Wintach CAD 103.0 112.2 8.9%
Wintach Calc 37.7 37.7 0.0%
Wintach Paint 45.4 45.8 0.9%
========================================================================
average 2.7%