Chuck Guzis wrote:
On 12 Feb 2010 at 15:30, Jeff Walther wrote:
> Anyone have a datasheet for the MCM62940
(MCM62940AFN14) static RAM?
> It's not strictly off topic, as it's from the 256K level 2 cache of a
> computer from the mid-90s (NuBus PPC Macintoshes).
Apparently, the MCM62486 is pin compatible and there
are datasheets
for that online:
--Chuck
Thanks you for the information, Chuck. They should be very similar. I
imagine the difference is that the XX486 version has adaptations for the
80486 methods of addressing memory, while the 940 version is more oriented
for the Motorola family of processors. At least, I think I read
something to that effect somewhere--maybe in the description of the
associated tag RAM.
Anyway, I've emailed Brent and hope to pay to ship the whole databook.
If anyone else decides they want to order the 4000 soldered down static
RAMs I referenced (they have 19 batches in stock), I can scan the
datasheet after I have the book--if I can get the scanner working again.
Darned glass fell out because the manufacturer's double sided tape got old
(it's more than 10 years old too). I tried a 3M tape
<http://www.shop3m.com/3m-high-performance-double-coated-tape-9088-fl3znfcqj3.html?WT.z_xsell=1&WT.z_refSKU=3M-HIGH-PERFORMANCE-DOUBLE-COATED-TAPE-9086-56Q9TKZKD9>
that looked promising but it didn't hold. I'm going to try again and
heat the tape and give it three days to set. On the first try I didn't
see the information that the adhesive needs to set for three days.
Who knew that one needs to read the datasheet on *adhesive tape* in order
to use it properly?
Jeff Walther