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Pentium Processor
Upgrade
Draft # 1. 2002.11.02
Draft # 3. 2002.11.16
Updated 2002.12.02
| When you use AMD K6-II CPUs rated higher than 350MHz for your
system running Windows 95B or 95C, you need amdk6upd.exe
. |
Zerus
P55C-K6-S1
Photos are donated by Jim Hall.
Explanation by Jim
| " For those of you who haven't seen this upgrade,
it consists of an interposer similar to the Madex, with a plug for a power
tap used on 3 1/2" clone style floppy drives to handle the power requirements
of the Intel (or any pin compatible) CPU. The cooling fan also draws its
power from the same source. " |
Exactly the same product was also sold in
Japan before. it was named as "Multimedia CPU Upgrade Kit ". It was made
of Taiwan and marked as "CE". I don't know this "CE" logo which can be
seen many computer products manufactured in Taiwan.
| # 1 Close View |
# 2 Bottom View |
# 3 Over View on Type Y |
 |
 |
 |
ALL pictures are captured by Jim Hall
3.3V single voltage for I/O and Core is not designated. Thus Jim set
Core voltage to 3.2V and put his classic Pentium P-166 with 3x speed jumper
setting and set it on his Y complex. Y complex has 60 MHz OSC so
his system actually run at 180 MHz.
Report to the news group from Jim Hall
"OK, ran a little windows program
called CPU id, by Alexander Berezkin.
It identifies the cpu as
an Intel Pentium, brand name GenuineI ntel.
Type ID = 0
Family ID = 5
Model ID = 2
Stepping ID = 12
Clock Frequency,
Internal = 180 MHz "
Careful with that axe, Eugene. Connection
pins for SPGA socket are shorter than the others.
Kingston
TurboChip
233 ( install guide in pdf format)
Kingston TurboChip 233 uses Intel MMX233 CPU.
Special Features
Your Kingston TurboChip 233 includes these important features:
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Powerful Intel® MMX™ enhanced microprocessor running at
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233MHz processing speed.
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32KB Level One (L1) Cache
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Onboard voltage regulator to interface with either 2.8V or 3.3V system
motherboard automatically.
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Supports multimedia extensions instructions
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“Plug and Play” installation. No software drivers to install.
Unfortunately TurboChip 233 does not have CPU speed jumper and it will
automatically set the clock multiplier to 3.5x . It is supposed that
TurboChip 233 may not run on Y complex. Any experience ?
TurboChip 200 uses AMD K6 200MHz.
Most possibly, It will be kicked out by system BIOS of Y complex.
TurboChip
400 ( install guide in pdf format)
Turbochip 400 uses K6-II/400 CPU. Needless to say
it's incompatible with type-4 Y complex.
But it may run in PC Server 320/520 or PC750 6886.
Evergreen
Spectra
233
Not sure which CPU this unit uses, Intel MMX233 or K6. Anyway
"233" means it may not work on Y complex
There were several models rated 300MHz to 400MHz using K6-II
CPUs like Kingston TurboChip.
I'm not sure but it seems Spectra upgrades do not have clock multipling
jumpers and they automaticaly set
it to Max rating provided with the CPU used..
Clock Multiplier
from AMD K6 manual 21850.pdf
4.10 BF[2:0] (Bus Frequency)
Inputs, Internal Pullups
Summary BF[2:0] determine the internal operating frequency of the
processor. The frequency of the CLK input signal is multiplied
internally by a ratio determined by the state of these signals as
defined in Table 18. BF[2:0] have weak internal pullups and
default to the 3.5 multiplier if left unconnected.
Table
18. Processor-to-Bus Clock Ratios
|
State of BF[2:0] Inputs
|
Processor-Clock to Bus-Clock Ratio
|
|
100b
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2.5x
|
|
101b
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3.0x
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110b
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2.0x or 6.0x*
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111b
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3.5x
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|
000b
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4.5x
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|
001b
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5.0x
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|
010b
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4.0x
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|
011b
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5.5x
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|
Note:
* The ratio selected is dependent on the stepping of the Model 8. The
2.0x
ratio is supported on the Model 8/[7:0], whereas the 6.0x ratio is
supported
on the Model 8/[F:8]. |
Sampled BF[2:0] are sampled during the falling transition of
RESET.
They must meet a minimum setup time of 1.0 ms and a
minimum hold time of two clocks relative to the negation of
RESET.
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