--- Mike Evans <[EMAIL PROTECTED]> wrote: > is present or absent... and on the same board there > are 4 empty > socket-like things in a row, but they look like they > are for > chip-like objects, not 30-pin SIMMs (it looked like > a row of c.10 > pin-sockets on either side of the 'chip') -- is this > some very old kind of RAM?
Sounds like DIP (Dual Inline Package) DRAM chips. 256K x 1bit each. 8 of those make up 256 Kilobytes, 9 if it uses parity. If you can find something like an old PC/AT or other 286 with 1meg onboard, there's the chips you need. :) And yes, it's old RAM. First SIPPs then SIMMS came along around 1984-1985 and began to push out the individual DIP chips. SIPPs and 30 pin SIMMs have the same pinout on the connector but SIPPs have a single row of pins. (The last of the SIPPs were just SIMMs with pins soldered on.) ===== http://www.junkscience.com "All the Junk that's fit to Debunk!" __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com -- Vintage Macs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> The FAQ: <http://macfaq.org/> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
