Very Computer

I have 2 cards that I think are both 2 meg OS 3.0 boards, but they
look completely different.  Maybe different manufacturers?

Card #1:  This is the thicker of the 2.  Has 4 chips on one side
(Toshiba TC518512AFT-80V).  On the other side is just one chip
(AM29LV160BB)

Card #2:  This card is very thin and has chips on only one side.  Has
one chip (SEC Korea 801 KM416V1000BT-16), one chip (AM29LV160BB), one
chip (TRG 50507C), one chip (ALVCH16271)

I could remove my 8 meg TRG card and try both of them, but I REALLY
hate to re-install all the software :-)  I'm hoping that some savy
person can confirm for me the following:

#1 - are they both 2 meg OS 3.0 cards?
#2 - which is the newer?

One of the cards is from a thrashed PIII and the other one is from my
PIII that now has the 8 meg card.  If I am correct,  the thinner card
is the newer one and was made by TRG and is what is currently being
used in the new PIIIs.  Correct?

Thanks,

Ken

This is a PIII 2M memory module.  The AM29LV160BB is the 2M flash ROM
chip.
The TC518512AFT-80V are each 512K Toshiba PSRAM chips. OS 3.0 is
installed
on the ROM by default.  It has no IR on the module.  Very common.

Quote:> Card #2:  This card is very thin and has chips on only one side.  Has
> one chip (SEC Korea 801 KM416V1000BT-16), one chip (AM29LV160BB), one
> chip (TRG 50507C), one chip (ALVCH16271)

This is apparently functionally identical to the first module.  I've
been told
that is is an OS 3.0 PIII module with 2M of ram by someone who did
install
it in a device.  This is only the second time I've heard of it.

Other information I have on the chips on this module (in case anyone
else
here can recognize them):

Quote:> TRG 50507C,BH2426.1,9839S
> then
> AMD AM29LV160BB-120EC,9835MBM KK
> then
> Texas Instuments 89CT32K,ALVCH16271
> then
> JAPAN C006,9811 FNN,51W16160LTT6

Note that the last chip is different.  

Quote:> I could remove my 8 meg TRG card and try both of them, but I REALLY
> hate to re-install all the software :-)  I'm hoping that some savy
> person can confirm for me the following:

> #1 - are they both 2 meg OS 3.0 cards?
> #2 - which is the newer?

I'd guess that #2 is newer.  I can't confirm or refute if it comes from
a 'newer' PIII, as I haven't opened any of them up.

-- Tim

Quote:> > Card #2:  This card is very thin and has chips on only one side.  Has
> > one chip (SEC Korea 801 KM416V1000BT-16), one chip (AM29LV160BB), one

The KM416V1000BT-16 chip is a Samsung 3.3V 1M x 16bit DRAM chip (60ns).

http://www.usa.samsungsemi.com/admin/production/globalsearch.asp?key=...

So, it's apparent that there are now PIII SRAM boards as well as DRAM
boards.

-- Tim

Hmmm, the TC518512AFT-80V of the original boards is PSRAM, too, and
needs refreshing. The refreshing is done by a chip on the palms
motherboard (the chip is very small, labeled USR-something and normally
numbered U52).

Ciao,
  Till

Yes, i've found the out, too. And the TI chip is a 24 to 12 bit multiplexer.

So this is a standard dram card. The TRG chip makes the RAS/CASH/CASL
timing and translates the refresh. It might be possible to guess what the
TRG chip does, but that is not that interesting. More interesting is the
idea of replacing the KM416V1000BT-16 by a KM416V4000B, which is the
64MBit version. This would only need minor rewireing and would expand the
RAM on the board to 8MB. The address multiplexer has enough address
bits to support that modification.

Does one of you know a source for that chip? I would try the mod and
publish the results on the web.

Ciao,
  Till