Got a 486 CPU in BGA package

[pinkie]

I got a Japaness Mobile Gear for DoCoMo machine yesterday.
I searched google for info about it .
http://www.ne.jp/asahi/ham/js1rsv/TEST/MG.htm

======
Performance of 486-PC Ver1.77h(C)1992-1995 DysanKeihin
H----------------------------------------------------H
| i486SX Frequency = 16.10 MHz Machine:AT v1.77h|
| CPUID Results = GenuineIntel Fam 4 Mdl 2 Stp13 |
| Ecache Read Time = 290 ns/dword ( 3.4wait, 14mb/s)|
| Ecache Write Time = 339 ns/dword ( 3.5wait, 12mb/s)|
| Memory Read Time = 290 ns/dword ( 3.4wait, 14mb/s)|
| Memory Write Time = 339 ns/dword ( 3.5wait, 12mb/s)|
H----------------------------------------------------H

80X86 CPU Speed TEST v0.980 Copyright 1992 ZOBplus Hayami
DHRYSTONE 30000 LOOPS
Execute memory area: 3000:0000 ->3000:1C28
CPU Type: i486SX Not FPU Virtual86 mode

Ratio to the first PC9801 : 20.62
Execute time : 03.35 sec
======

I'm surprise that there is an intel 486sx-16 in this samll machine.
I tried to boot it up but fail.


So I opened it to take the CPU for my collection, I expect there is a PQFP i486sx-16 in it, I don't have a PQFP i486sx-16 in my collection yet.






But what I found ?

I'm super surprise there is BGA i486sx-16 in it.













Whold board:
http://x86cpus.googlepages.com/Mobile_gear_06.jpg

[Marcin]

IBM ... and all is known Nice modification. It is new for me.

[FDIV]

Very interesting. In flip chip configuration. It must have been made much later than most 486's. Quite an interesting anomaly.

[debs3759]

What a wonderful find! I didn't know that one existed.

[pinkie]

Whold board picture:
http://x86cpus.googlepages.com/Mobile_gear_01.jpg

[Cpuswe]

So who made this? IBM? (ie where should i put it in the library )

[pinkie]

There are "i(m)(C)'89'94" marking on ther PCB board.
So I think it's made by IBM with intel's 486 core.

[Mixeur]

I think so too.
MMC-1 and MMC-2 cards are made by IBM, with Intel cpus.
It could be the same.

[hugo929]

Look "70H0859" at the board!
It's obvious IBM naming convention