Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!ericom!california.ericsson.se!etxsral From: etxsral@california.ericsson.se (Lars Nilsson) Newsgroups: comp.sys.ibm.pc.hardware Subject: Re: Designations on chips Message-ID: <1991Jan10.191058.15353@ericsson.se> Date: 10 Jan 91 19:10:58 GMT References: <1991Jan8.062424.11291@d.cs.okstate.edu> <1046@accucx.cc.ruu.nl> Sender: news@ericsson.se Organization: Ericsson Telecom, Stockholm, Sweden Lines: 24 In article <1046@accucx.cc.ruu.nl> jaapv@accucx.UUCP (Jaap Verhage) writes: >In article <1991Jan8.062424.11291@d.cs.okstate.edu> ong@d.cs.okstate.edu (ONG ENG TENG) writes: >>I think the DRAM that you need are 44256's, which you can buy from >[...] >This originally was about upgrading a VGA card. As I've done the >same thing with different chips, I'm beginning to wonder what the >codes on the things mean. Like, what's the difference between a >41256 and a 44256? Furthermore, there seems to be a speed >designation included, like when you see the number on the chip end >with -10. Would anyone please enlighten this poor beginner at how 41256 is a dram with 256k x 1 bit 44256 is a dram with 256k x 4 bits The -10 means that the accesstime is 100 nanoseconds. BUT, the numbers on the chips is up to the manufacture so to be completely sure about the meaning you have to look in the datasheet. -- Lars Nilsson Ericsson Telecom AB , Stockholm - Sweden E-mail: etxsral@california.ericsson.se Fidonet: Lars Nilsson @ 2:201/108.7