Y Type 4 Complex
Refdisk and Diags
Memory supported, cache, features
Flash BIOS 05 from BIOS 03 or less
BIOS Level Revison Features
Serial Data Link
"Y" / Upgrade Pentium 90/60 MHz 06H3739
Refdisk and Diags
Disk for Type 4-
for Type 4- (Common to all complexes)
Min/Max on system board: 8/64MB Parity, 8/256MB ECC
RAM: DRAM (PS/2 72-pin SIMM, ECC or Parity) 70ns
Cache: 8kb L1, 256kb L2 (P60, P66, P90)
* 40 MB per second streaming
* Error Checking and Correcting (ECC)
* 256KB Level 2 memory cache (write-through) on Pentium complexes,
128K on DX2-66
* 20 MHz DMA; 32 bit DMA can directly address all memory
* DMA supports Subsystem Control Block.
* Faster bus arbitration (than Base 1) for busmaster performance.
* Enhanced Dual Path Memory
* Subsystem Control Block
* Vital Product Data
* Synchronous Channel Check
* Data bus parity support
* A logging facility is provided (for ECC or system errors)..
Trying to flash BIOS 5 and up from 03 or Lower
Complex BIOS Levels
FDIV Processor Replacement
processor Replacement (FDIV) Information
If you have a -xPx or -xQx complex (even the mighty -xPx), chances
are it has the FDIV bug. Intel will swap out your processor with a like
processor. Same speed. No upgrade for the FDIV chip is available. Read
the stuff on this link. It will give you the phone# and the requirements
for swapping the chip out (Includes the CPUID
program to identify the presence of the FDIV bug). You will have to give
them a credit card number.
They will send out a non-FDIV chip and a pre-paid shipping
envelope. You pop the old chip out and return it to Intel. If they do not
receive the old chip within 30 days they will charge the credit card number.
I had my replacement in under a week of my call....
(Extrapolated from the Type 3 information)
The Type 4 processor board has two LEDs; one in
position CR1, and one in CR2.
Serial Data Link
"Y" / Upgrade Pentium 90/60
10G3441 Synchrostream Controller- Blue
translucent chip. Can be yellow or blue. Though I have not seen any yellows
myself, it may happen. Currently investigating if there is any meaning
to this difference as is the case with the 76/77 planars.
The vaunted P90 complex
U24 DMA Controller??? 8190587
Cache Chips i82492-60
Cache Controller i82497-60 (-66
will work as well)
J3- Serial port connector to operator
J5- The "Flash
ROM bank" switch -by the way- was originally planned for a sort of
"emergency mode". Once you screwed up the Flash-BIOS you could toggle the
bank, insert any working flash update in the FDD A: and restart the
machine, which takes the flash-image from the floppy drive and recovers
(as it can be done on the 704 in the "Bios recovery mode"). However: the
base boot-BIOS did not have the required routines to delete the loused
up bank of the Flash-ROM ... and as far as I know the loading of an image
from Floppy does not work. Another useless feature.
J6- Known but to God. Shocking
news! This jumper has been reported on a P66 complex!!
Artifact- Serial Link J5 on Type
4 complexes (-xNx, -xPx, -xQx, -xYx)
The serial link was (as far as I know) intended
for the use with an earlier system management adapter, which didn't made
it to the salesroom. The idea was to supply a sort of status-link to the
processorboard and the SCSI- adapter(s) and the (possible)
backplanes on the later servers.
Cache controller Try HERE
and search for A82497-60. Thanks, Senum!
CR1 and CR2 Diagnostic LEDs.
06H3739 vs. 06H7095
There are two FRUs for the P90 complex-
If you go to the EPRM
(wrong Pentium® 90MHz Processor Card !) 06H3739
Pentium® 90MHz Processor Card
Oliver Schweizer said
I once called the spare part hot line and they told me
that the 06H7095 is intended just as a replacement for a crashed complex.
According to them the number change came because the original complex could
contain the bug-ish P90 and the replacement unit not. If I remember correctly
they asked about 1500-2000 $ for the 06H3739!! A real tempting offer ;),
but after weeks of sleepless nights I decided to stick with my type 2 complex
(and got the pentium power now for about 5% of that price).