Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!apple!julius.cs.uiuc.edu!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!dsinc!netnews.upenn.edu!vax1.cc.lehigh.edu!lehi3b15!tbrown From: tbrown@lehi3b15.csee.Lehigh.EDU (Thomas Brown [901015]) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: Designations on chips Message-ID: <1352@lehi3b15.csee.Lehigh.EDU> Date: 21 Jan 91 20:39:56 GMT References: <1991Jan8.062424.11291@d.cs.okstate.edu> <1046@accucx.cc.ruu.nl> Reply-To: tbrown@lehi3b15.csee.Lehigh.EDU (Thomas Brown [901015]) Organization: CSEE Dept. Lehigh University, Bethlehem, PA Lines: 26 Jaap- 41256 - 256K x 1 bit - "standard" dynamic RAM used in IBM, others. typically set up with 9 chips in each bank (8 data + 1 parity) 41464 - 64K x 4 bits - used in VGA cards as video memory (1 bank of 8 chips is an additional 256K of video RAM) 44256 - 2456 x 4 bits - used in newer systems, EMS cards, etc. typically set up with two of these chips plus 1 1-megabit chip (1 meg x 1) per bank. 4xxxx-ss - 'ss' is speed rating where: 20 = 200 ns, 15 = 150ns, 10 = 100ns, 8 = 80ns, 7=70ns, etc. Some devices have prefixes as well, but they usually indicate the manufacturer of the device (i.e. MC = Motorola, KM = Samsung, etc.) Regards, Tom --=-- Thomas Brown, KA2UGQ BITNET: twb0@lehigh.bitnet Lehigh University UC Box 855 ARPA: tbrown@lehi3b15.csee.Lehigh.EDU Bethlehem, PA 18015 UUCP: ..!uunet!twb0@lehigh.bitnet (215) 758-0093 AX.25: ka2ugq@ka2ugq.nj.usa.na 'You can't have everything...where would you put it?' -S.W.