wire trick unlocking 2100+XP = missing multipliers?

[Dfed]

Trying the wire trick on a ECS L7S7A2 numerous times to unlock my new AMD XP 2100+ I get the following mulitpliers...
5.0
5.5
7.0
7.5
9.0
9.5
11.0
11.5
I am missing the 6, 8, 10, 12 multipliers. Have any other AMD XP2100 through XP2400 owners experienced this? Or maybe it's just a XP2100 issue where I need to close the L1 Bridges? Thanks in advance.
L7S7A2 with Svente75's MOD3219 BIOS
AMD XP2100+ 0.13 Micron, Revision B.
512MB Cricial XMS PC2700 CL2
450W PSU
ATI Radeon 9500 pro

 

[johncar]

Originally posted by: Dfed
Trying the wire trick on a ECS L7S7A2 numerous times to unlock my new AMD XP 2100+ I get the following mulitpliers...
5.0
5.5
7.0
7.5
9.0
9.5
11.0
11.5
I am missing the 6, 8, 10, 12 multipliers. Have any other AMD XP2100 through XP2400 owners experienced this? Or maybe it's just a XP2100 issue where I need to close the L1 Bridges? Thanks in advance.

We're assuming your mobo i somehow able to try to reset the default multiplier.......

If so theny Your system is not able to reset the 1X Bit Value signal circuit from its default LO to a HI. That's why you are missing every other integer Multiplier that needs the 1X signal circuit to be HI
Example, 9X needs 2X and 4X circuits to be HI.
10X needs 1X, 2X, and 4X circuits to be HI. So when you set 10X you get only 9X.

Possible reasons:- If your CPU is a Palomino then either the 2nd L1 bridge from the left is still open so that mobo driven circuits are unable to reset the default LO 1X signal circuit...OR...in the process of closing it you got conductive material in to the pit and made contact with the sub surface ground plane that the pit exposes, such a direct ground cannot be pulled HI again.

If you CPU = Tbred with L1 bridges closed from the factory, then we don't see how you could have permanently grounded that circuit.

http://www.beachlink.com/candjac/index.htm link to Multiplier Code and Circuits articles to understand how Multipliers are set/reset in terms of the "Code", Multiplier bridges, and how mods to the L1 bridges can cause "unexpected results".
John C.
BTW, the wire trick to access the lower Multipliers should have nothing to do with not being able to reset the 1X Bit Value signal circuit.

 

[Dfed]

Yes, it a brand new CPU from The factory with no modifications to the bridges. Just a new CPU and wiretrick that's all. This problem has been puzzling. Specs below. Thanks for reply and excellent link.
AMD Athlon XP
Core: Thoroughbred B High end
CPU Model: 8
Performance Rating: 2100+
Working Frequency: 1733
Package Type: OPGA
Operating Voltage: 1.60v
Operating Temperature (Max): 90°C
L1 Cache Size: 128KB
L2 Cache Size: 256KB
Multiplier: 13.0
FSB Frequency: 266MHz
Stepping Code: AIUHB
Manufacture Year: 2003
Manufacture Week: Week 06
Production Batch: M
Batch Production Number: 0338
Downgraded from: 2800+

 

[johncar]

The only other thing we can think of is related to the so-called "wire trick". That usually means grounding the 8X Bit Value signal circuit with a fine wire loop inserted between socket AJ27 and a nearby ground socket like AH28. This is done to gain access to the lower 5X thru 12.5X multipliers.

However, another nearby socket AL27 is the socket for the 1X Bit Value signal circuit in question. So just maybe the u-loop might have been installed in AL27 instead of AJ27. Of course that raises the question of then how were you able to access the lower multipliers. Not sure of the answer, but might be worth a look to check on the location and condition of that u-loop. Maybe it elongated out during install and is touching "both" AJ27 and AL27. Workarounds article at our site has good info and pics for positively locating the various sockets.
John C.

 

[Dfed]

John, thanks you for taking the time to write your reply, I appreciate it. I have posted this on a few message boards and nobody has encountered this strange problem before. Your ideas point to the most logical cause. Although it's only 3 millimeters long, the wire U-loop must be bending in the CPU pin holes as the CPU lever lock is pushed down on the socket. I will shorten the wire and fiddle around with it more. Thanks for pointing me in a direction. I didn't know what direction to pursue. Take care.