Date: Fri, 24 Oct 2003 14:15:27 +0100 From: Paul Brierley <[EMAIL PROTECTED]>
I just found this on eBay, sadly not in the UK but maybe of interest to someone in America:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2761270047&category=4610
Looks like it includes the correct ROM to make an SE/30 32bit clean. I'd kill for one of those...
The pictures include IIfx RAM which is interesting to me because it answers something I have been wondering about, although I guess this is once removed. The IIfx RAM in the picture appears to just be made of memory chips. No extra PLDs to provide additional logic or anything. So why does the IIfx RAM have 68 (64?) pins? Does anyone have a pinout for this stuff?
I mean, it's only eight bits wide. So 8 data lines, 12 or 13 address lines, CAS, RAS, WE, power, ground, that's less than 30 pins. I toyed with the idea that the stuff doesn't multiplex the address, so that you'd have 24 or 26 address lines, which would give you a nice latency improvement in the host machine. But the multiplexed memory scheme is a function of the memory chips. You can't avoid it unless you can find weird memory chips and they'd need more pins, and the memory chips on the SIMMs in the picture sure don't look like they have a bunch of extra pins.
So why all the pins on the IIfx memory? Does anyone know?
Jeff Walther
-- Compact Macs is sponsored by <http://lowendmac.com/>.
Support Low End Mac <http://lowendmac.com/lists/support.html>
Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> --> AOL users, remove "mailto:"; 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/compact.macs%40mail.maclaunch.com/>
---------------------------------------------------------------
The Think Different Store
http://www.ThinkDifferentStore.com ---------------------------------------------------------------
