Rd9095a.exe Common Diagnostics for all 859x / 959x Systems "Q" / Upgrade Pentium 66 MHz 92F0120
Dealing with P66 complex with no CPU and/or L2 cache controller
Intel Pentium Overdrive 133MHz (POD133/120)
Possible Q Upgrade Success! (Tim Clarke returns!)
"Q" / Upgrade Pentium 66 MHz 92F0120
C39 22uF capacitor not present on P
complex. Possible power filter?
Outline Left of CPU Unknown. Maybe for a component that used four mounting posts to match the pattern. The right pair have thick PCB traces going to them. Maybe a VRM?
Q Complex Back
S-Spec numbers for 66MHz Pentiums affected by FDIV-Bug
P5-66 [A80501-66] Q0353, Q0395, Q0413, Q0467, SX754, SX837, SZ950
Look for an A82496-66 Cache controller, at this time, I'm unaware of any stepping issues...
Transitional "Q" / Upgrade Pentium 66 MHz 71G6197 [Suzie Q]
Imagine my shock when Lorenzo Mollicone sent me pictures of what initially appeared to be a -xPx. Upon closer inspection, OS1 is 66.666MHz, the complex FRU is 71G6197, and most significant, the FCCID of the complex is for a 66MHz complex. It seems plausible that this is a transitional Q [Suzie Q]
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 data transfer.
* Error Checking and Correcting (ECC) memory controller
* 256KB Level 2 memory cache (write-through) on Pentium complexes
* 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 enabled
* Vital Product Data support.
* Synchronous Channel Check support
* Data bus parity support
* A logging facility is provided (for ECC or system errors)..
Intel Pentium Overdrive 133MHz (POD133/120)
I dug through craploads of old Intel documents today, and found my notes from Intel (circa '95) for the Pentium Overdrive 133MHz (POD133/120) processor.
Written in plain ingles, the Intel doc says: "will not support the 82496 Cache Controller and 82491 Cache SRAM chip set" . Additionally, the documentation states that the POD133 is designed to support _PCI_ chipsets.
Some other notes:
- IU, IV, and IBT plus have been removed
- branch trace pins (BT[3:0]) have been removed (no execution tracing)
- breakpoint pins (BP[3:0]) have been redefined such that each assertion of one of these pins indicates that 1 to N BP matches occurred, where N =core/bus frequency ratio
- STI/CLI (restore/clear interrupts) are each 2 clocks shorter
Possible Q Upgrade Success
Tim Clarke said:
Without going into too much analysis as to WHY its working. I have this up and running reliably, so far. Using a T4-P66 complex previously Flashed to BIOS Level 10, an 82497 cache controller from a T4 P90 complex and a stock PODP5V120/133 Overdrive for Socket 4 (Ed. square 21x21, 237pin PGA (pin-grid-array), stop beating me, Tim!))
It threw the odd "1047000 221" error (cache/memory-related?) early in the power-on, auto-reconfigure, set date&time, auto-reboot song and dance but doesn't seem to do that anymore. Maybe there are some devious POS-stored auto-tuned cache-control/memory-access related parameters, but hey, I'm not complaining.
496 vs. 497 Cache Controller
From Dr. Jim Shorney
The '497 reportedly has a 3.3v core, but it seemed to run stable and reliable for several hours with the stock P60 CPU in my system in place of the 5v '496. I briefly looked over the docs this afternoon (712 pages, wow...). Seems the '497 is still a 5v part, it is the I/O buffers that connect to the CPU that are 3.3v. This probably explains in part why the chip doesn't self-destruct in the '496 socket. It also seems to invalidate the need for an interposer, since the P60/66 I/O is 5v anyway and the buffers would have to run at 5v to interface at all with the CPU. This brings up the question of noise immunity, though - will circuits designed to run at 3.3v logic levels be more or less sensitive to noise or poor signal quality when run at 5v? Inquiring minds want to know.
From Tony Ingenoso
9595 Server 95 (AKA "Server 95 566")
9595-0QT - P66, 16/256MB (ECC), 1GB SCSI-2 F/W, 2.88,
9595-0QTF - As above - Canadian French
9595-0QV - P66, 16/256MB (ECC), 2GB SCSI-2 F/W, 2.88
9595-PQG - Pentium 66, 16/256MB (ECC), 540MB SCSI-2 F/W, 2.88
9595-PQT - P66, 16/256MB (ECC), 1GB SCSI-2 F/W, 2.88
9595 Server 95 Array Models (Also called 95A)
9595-3QG - P66, 16/256MB (ECC), 3 x 540MB SCSI-2 F/W, 2.88
9595-3QT - P66, 16/256MB (ECC), 3 x 1GB SCSI-2 F/W, 2.88
NOTE: SERVER 95 -PQG & -PQT models came with MGA Ultima Video Graphics Adapter, CD-ROM-II drive, and 3-button mouse