Re: Are Simms still available???

On Tue, 28 Mar 2006 15:12:02 +0000 (UTC), schepers@xxxxxxxxxxxxxxxx
(Peter Schepers) wrote:

In article <jc3h22lldhdj34nvkr2dscffhrl3u8cedc@xxxxxxx>,
Casca2525 <Casca@xxxxxxxx(sympatico)> wrote:

What the heck is a ZIP??? This ramlink expander uses only simms
of various kinds. It can use combo of 1 meg and/or 4 meg simms
only far as I know.
Joe
a ZIP has all the pins on one edge and stands on its side,
all it relates to your issue is in the sense that while 4 meg 30 pin
simms are rare zipps are pretty near the preverbial hens teeth

Well, I've never seen them called ZIP before. SIPP, yes. It stood for
Single Inline Pin Package and were only seen on the early 30 pin type
memory. Ironically, they were actually SIMM's with pins soldered to the
pads. They were very briefly common in the mid 80's and they were replaced
by the SIMM (Single Inline Memory Module).

See: http://www.microstar.net/museum/sippmemory.html

---------------------------------------------------------------------------
Peter Schepers, | Author of : 64COPY, The C64 EMU file converter
Info Systems & Technology | http://www.64copy.com
University of Waterloo, | My opinion is not likely that of the
Waterloo, Ontario, Canada | University, its employees, or anybody
(519) 888-4567 ext 6347 | on this planet. Too bad!
Yup you are exactly right about sipps, but zips are not sipps, rather
they are a chip, (jeez I feel like Dr suess) your familiar with the
DIP chips used in the 64 for DRAM?
well imagine one of those sitting on the table in front of you, now
instead of there being legs on each side like a bug all the legs are
on one side in a ZIGZAG (the z in zip) zigzag inline pin package chips
Regards
Casca

And if you never heard of them before your not alone, to the best of
my knowledge only some ibm PS2's used them for video ram, and only had
2, and a few 3rd party video cards did as well, the Amiga 3000 was the
only thing to use a large # of them, hence the rarity factor, I have
NEVER laid eyes on ZIPs that would work in an A3000, I have only ever
seen the VRAM ones in IBMs.

I found this online
Zig-zag in-line package
From Wikipedia, the free encyclopedia
Jump to: navigation, search
The zig-zag in-line package or ZIP was a short-lived packaging
technology for integrated circuits, particularly dynamic RAM chips. It
was intended as a replacement for dual in-line packaging (DIL or DIP).
A ZIP is an integrated circuit encapsulated in a slab of plastic,
measuring about 3 mm x 30 mm x 10 mm. The package's pins protrude in
two rows from one of the long edges. The two rows are staggered by
1.27 mm (0.05"), giving them a zig-zag appearance, and allowing them
to be spaced more closely than a rectangular grid would allow. The
pins are inserted into holes in a printed circuit board, with the
packages standing at right-angles to the board, allowing them to be
placed closer together than DIPs of the same size. ZIPs have now been
superseded by surface-mount packages such as the thin small-outline
packages (TSOPs) used on single-in-line memory modules (SIMMs) and
dual-in-line memory modules (DIMMs).

.

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