What I'm really after is small RAMs with separate ins and outs, and the
current generation stuff doesn't seem to address that requirement. I guess
I'll have to use a CPLD or FPGA with RAM inside.
Dick
-----Original Message-----
From: Tony Duell <ard_at_p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp_at_u.washington.edu>
Date: Wednesday, October 20, 1999 7:22 PM
Subject: Re: outgrowth of : OT: how big would it be?
>>
>> So, who makes 256-byte RAM devices at TTL speeds these days. There are
all
>
>Good question... All sorts of useful, generic, devices are no longer
>made. Oh, there are millions of complex chips for particular
>applications, but just try getting a small RAM, or a simple UART, or...
>
>> 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.
>
>
>Remember you can always use a larger static RAM that you strictly need
>and just tie the unused address lines to a defined state (e.g. ground).
>So possibly you could use the same chip for both problems.
>
>What about the cache RAM off a PC motherboard (is that still being made?)
>It was pretty fast (15ns or better?), and 32K*8 skinnydips were used I
>think. Or am I a year out of date again?
>
>-tony
>
Received on Wed Oct 20 1999 - 22:24:17 BST