Date: Thu, 30 Oct 2003 03:38:31 -0800 From: PhotoEngineering <[EMAIL PROTECTED]> Subject: Re: [LIB] Amount of memory addressable??
<VBG>I starting using Eudora (really nice mailer) for my mailing and it has a mood watcher. It told me my comments in the following message were awful and I should get my keyboard washed out with soap. I decided to send it anyway without any editing so, gentle readers, if you are easily offended please avoid reading this message!!<VBG>:
J.
At 07:24 AM 10/30/2003, you wrote:
Date: Thu, 30 Oct 2003 10:59:21 -0500 From: "Lewin A.R.W. Edwards" <[EMAIL PROTECTED]> Subject: Re: [LIB] Amount of memory addressable??
Actually--sorry--I miswrote. It has a 32 bit address buss which Toshiba did not use all of. If they had we could use 168 pin sodimms to upgrade
You don't get it. The Pentium has a 32-bit address bus, yes. You could put 4Gb of SRAM on it. But it addresses main memory through a DRAM controller. The DRAM controller is designed to support devices of specific densities. From the pinouts you posted, it can handle devices with up to 4K sizes.
I donno where you got 4k from what I posted. What I posted showed it can handle16k sizes.
Actually it is not limited at all since computer memory has not been dependent on the width of the address buss since what?!? never? The idea
Ah. Okay. You really need to avoid talking about things of which you have no comprehension, although it is quite humorous.
Dude--I cut my teeth on data sheets when I was a baby.
Insults will get you nowhere, son. Its nice, but not unusual, someone as clueless as yourself would find me humorous, though. As far as comprehension--all I wanted was for someone to explain what the silly codes were Toshiba used to identify the memory control lines. I could care less whether you think the ram is or is not upgradeable or to how much or whether you think sdram will work. I already know it is and it does. As near as I can tell from your opinions you don't have much of an idea of how to do or know much of anything.
Heh--it has a programmable GA setup as a edo dram controller. It is
It's a mask-programmed ULA or a straight-out ASIC. There is no way it's an FPGA.
So now you claim to know how some of the best hardware engineers in the business design? I mean--you really need to get a grip. Take your computer apart and look--instead of being a moron.
never a problem to access a differant type of ram as long as the new ram
Yeah, yeah, etc. If you're capable of reading a timing diagram, go to www.partminer.com and download an SDRAM datasheet, say Toshiba TC59S6416CFT, and compare it with an EDO datasheet, say VG2618165CJ.
The one bright spot is this whole shebeel you wasted your time with is that you did mention a link where I found a data sheet I've been looking for. Its nice to have a gopher around some times.
need to hack a Libretto module? The pinout of the expansion connector is same as a 144 edo sodimm. No hacking needed. I thought of a sodimm first
Might be true, but the connector is proprietary.
So? What has that got to do with anything?
There is no limit to the memory the bios can see.
There most certainly is - because it has to set up the GA for the correct bank size and refresh parameters. Of course, you'd know this if you had written POI code for hardware of this type.
Neither of those limits the amount of ram in any way. By the way..you are a real idiot if you think you are impressing me or anybody else that has any kind of electronics design experience with any sort of knowledge or ability. Shoot- even an assembly techie knows more than you.
By the way, you might want to check my bona fides for making statements like this. Have a look at www.zws.com and in particular the DF-390 and DF-560 products, for which I designed the hardware and wrote the firmware. The DRAM subsystems in these devices are very similar to PCs of Libretto vintage. Or, to put it another way: I do this type of thing for a living.
Really? That's a piss poor way to give yourself the voice of authority. First you show absolutely no technical expertise at all then you claim "I do this for a living". In other words you go around designing shit systems that can't be upgraded. (I'm not saying the Libretto is crap but it can be upgraded.) (heavy..very heavy sarcasm) Yup..what you design will be the first that I run out and buy. (end sarcasm)
John [EMAIL PROTECTED]
-- -- Lewin A.R.W. Edwards (http://www.larwe.com/) Learn how to develop high-end embedded systems on a budget! http://www.amazon.com/exec/obidos/ASIN/0750676094/zws-20
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