Path: utzoo!attcan!uunet!ginger.acc.com!ivucsb!todd From: todd@ivucsb.sba.ca.us (Todd Day) Newsgroups: comp.dsp Subject: Re: Building a DSP board, Part Four: Hooking up RAM & ROM Message-ID: <1989Sep30.124745.12444@ivucsb.sba.ca.us> Date: 30 Sep 89 12:47:45 GMT References: <1989Sep29.051916.7920@ivucsb.sba.ca.us> Organization: Disillusioned Graduate Hackers, Santa Barbara, CA Lines: 33 I forgot to mention that the IDT SRAMS I choose were SIPS (single in-line packages). They were also 64k x 16bit. I needed two of them for (one for X mem, one for Y mem). They each had 40 pins. Hookup was quite simple. First, I put 5 16-pin dips in a row like this: ______ ______ ______ ______ ______ / \/ \/ \/ \/ \ <-- each one of this is a 16 pin dip oooooooooooooooooooooooooooooooooooooooo oooooooooooooooooooooooooooooooooooooooo This gives me two rows of sockets for the SIPS. Basically, I just connect each of the adjacent pins like this: X | oooooooooooooooooooooooooooooooooooooooo |||||||||||||||||||| ||||||||||||||||||| oooooooooooooooooooooooooooooooooooooooo | Y The X and Y are the individual chips selects. The rest of the pins are power, control signals, address lines, and data lines, which are the same for both chips. This arangement takes very little board space and is quite easy to hook up. -- Todd Day | todd@ivucsb.sba.ca.us | ivucsb!todd@anise.acc.com "Ya know, some day these scientists are going to invent something that can outsmart a rabbit" -- Bugs Bunny