Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.csd.uwm.edu!gem.mps.ohio-state.edu!ginosko!uunet!crdgw1!crdos1!davidsen From: davidsen@crdos1.crd.ge.COM (Wm E Davidsen Jr) Newsgroups: comp.sys.ibm.pc Subject: Re: Humor me Summary: Since I said it... Message-ID: <307@crdos1.crd.ge.COM> Date: 7 Sep 89 20:56:14 GMT References: <19568@gryphon.COM> <293@crdos1.crd.ge.COM> <1214@marlin.NOSC.MIL> Reply-To: davidsen@crdos1.UUCP (bill davidsen) Organization: GE Corp R&D Center Lines: 31 In article <1214@marlin.NOSC.MIL>, jbjones@marlin.NOSC.MIL (John B. Jones) writes: | Please, a few morsels for the ignorant... | | What is a SIMM? What is DIP? What is the difference between these two? | Go ahead and post, I guess; it would probably be beneficial to the group | at large. Thanks for explanations. Since I mentioned it, here's what I meant: the SIMM is a Single Inline Memory Module. What that means is that it is a component which is high and narrow, and has a single line of connectors on the bottom. A DIP is a Dual Inline Package, which looks like a typical "chip," having a row of pins down each side of the chip. The SIMM saves board real estate while the DIP is cheaper. I suspect that the cost of making them is about the same, per MB, but that the chip makers feel the SIMM is "better" and charge a lot more for it. Note that I don't state this reason as a fact. DIPs are 1 bit wide, so for a 16 bit computer you need at least 18 (16 bits plus parity), while SIMMS can be made wider, in 8 bit (no parity, for Macs and system which don't bother to check errors) and 9 bit (for PC types). ________________________________________________________________ | | | Going on vacation... be back 9/18 or 9/25 weather permitting | | Replies will be delayed. | |________________________________________________________________| -- bill davidsen (davidsen@crdos1.crd.GE.COM -or- uunet!crdgw1!crdos1!davidsen) "The world is filled with fools. They blindly follow their so-called 'reason' in the face of the church and common sense. Any fool can see that the world is flat!" - anon