outgrowth of : OT: how big would it be?

From: jpero_at_pop.cgocable.net <(jpero_at_pop.cgocable.net)>
Date: Wed Oct 20 22:01:08 1999

> Date: Wed, 20 Oct 1999 21:30:06 -0600
> Reply-to: classiccmp_at_u.washington.edu
> From: "Richard Erlacher" <edick_at_idcomm.com>
> To: "Discussion re-collecting of classic computers" <classiccmp_at_u.washington.edu>
> Subject: Re: outgrowth of : OT: how big would it be?
> X-To: <classiccmp_at_u.washington.edu>

> Yes, those parts were OK, except that they are several orders of magnitude
> too slow. Volatility is not the issue, since it will be changed frequently,
> but it's VITAL that the parts be quick, i.e. 5-7 ns max, on address access
> and separate ins and outs would be best. I don't care if I waste 95% of the
> RAM, but it should have separate ins and outs, and I have seen VERY few of
> those, particularly in the speed i want.

Piece from a 16 or 8MB SDRAM rated PC100, thats around 8ns.
Failing that, look into those 8ns, and less 32K x 32bit SRAM chips
off the super socket 7 boards? SS7 boards runs at 100mhz and some
have successfully overclocked it over 100mhz.

or SGRAM which is video ram with seperate dual buses I think in that
ns speeds you looking for.

Wizard throwing out ideas.

> Any suggestions?
>
> Dick
>
> -----Original Message-----
> From: Roger Merchberger <zmerch_at_30below.com>
> To: Discussion re-collecting of classic computers
> <classiccmp_at_u.washington.edu>
> Date: Wednesday, October 20, 1999 8:13 PM
> Subject: Re: outgrowth of : OT: how big would it be?
>
>
> >Rumor has it that Richard Erlacher may have mentioned these words:
> >>So, who makes 256-byte RAM devices at TTL speeds these days. There are
> all
> >>sorts of FIFOs of 256 bytes, but I can't find a simple 256-byte RAM any
> >>more. I also need a 32x8-bit sram, fast (preferably address-access time
> >><<10ns) and preferably in a small package.
> >
> >Not sure who still *makes* them, but BGMicro and I think Jameco still sells
> >Moto 6810 & I think 68B10 parts - IIRC 128x8 parts. (No, not Meg, No, not
> >Kilo, but 128 Bytes... just to clarify ;-)
> >
> >Also, if you're looking for non-volitile, you could go with one of the
> >Dallas Semiconductor 12x887 parts - 14 bytes of control registers for the
> >onboard clock chip, and 114 bytes of general-purpose battery-backed RAM.
> >
> >BGMicro has some pretty weird stuff... including some really nice kits from
> >what I recall. www.bgmicro.com; I think they have a catalog online, if not
> >you can download it as a .pdf...
> >
> >Hope that helps,
> >Roger "Merch" Merchberger
> >--
> >Roger "Merch" Merchberger --- sysadmin, Iceberg Computers
> >Recycling is good, right??? Ok, so I'll recycle an old .sig.
> >
> >If at first you don't succeed, nuclear warhead
> >disarmament should *not* be your first career choice.
>
>
>
Received on Wed Oct 20 1999 - 22:01:08 BST