Sizing memory in Protected Mode By Robert R. Collins The Concepts of Sizing Memory To determine the actual size of RAM, we need to detect how many address lines are connected to the RAM chip. To determine how many banks of memory are in the computer, we test the existence of RAM for each bank. By repeating this RAM sizing algorithm for each bank of memory, we can determine how much RAM is installed in the computer. To summarize: knowing the relationship between CPU addresses, RAM row and column addresses, and bank selection addresses is essential to determining RAM size and quantity. Sizing RAM under program control is accomplished differently than it was during the power-on sequence. Back to Books and Articles
FREEWARE GUIDE - Your Guide to the Best Free Software and Freeware Sites! DAILY ROTATION Linux 0.01 ported to gcc4 Linux 0.01 0.01 is the first version of linux (also called freax ;) ), released on september 1991 by linus. You can download the original version here You can't do too much with this os, exept learning how os work. So don't try to run X application on it :) If you want more information then read this Linux-0.01 is realy too old, so you can't build it in your modern computer . Linux 0.01 - remake The main goal of this project is : - to build linux 0.1 from modern linux (I use debian etch for bootstrap) - to use gcc-4.x - to run binary in userland. ( I use elf format because I had some problem with a.out with gcc-4.x - more inportant : learning lot of things about OS dev. For now the kernel can be executed. Note : - I have not yet tested it on real hardware ! hdd linux-0.01 use old CHS : head value is coded in 6 bit so you can't have more than 63 head (1023 for cylinder, and 63 for sector) If you HDD has too much head, sector or cylinder, then use fdisk to adjust them. screenshot vim
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OS Development Skeptically OS Development Skeptically This document has been written to address certain questions of the OS development that often arise when attempting to make a homebrew operating system. The document is probably of no use to those, who are professionals in the area. So, if youre an expert in OS dev and you know the thing from inside out, dont waste time reading this document. This document is aimed at newbies, wannabies, and other unprofessional coders, who want to make their own OS and have already faced (or are yet to face) a lot of trouble down the way. Right, why developing an OS at first place? Well, there are several reasons for making an OS. Im a fucking cool coder, much better than those kiddies from the next block. Those, who can put their sign next to items 4, 5 or 6 of the list, should read the document with attention. And when youre through with an OS (meaning youve done it), youll be able to say you acquired extra knowledge, skills and experience. Just like I said, it depends.
Last Freeware version: jv16 Powertools, RegCleaner, PowerArchiver, PopCorn What's New April 12, 2014 Added: Programs by Timothy Williams (SDSoftware) (UsefulSaver 1.0.1, ExplorerView 1.1, BlackTop 1.0, SysFile 1.2) January 2, 2014 Added: JJC Program Finder, Text to File Renamer, Multi-File Renamer, Quick Folder Locate and Open, Recall, and Mini Clock Alarm January 1, 2014 Added: Easy MP3 Tools, Multicalc, Safe Backup, File Splitter, Shortcut Genie, and JJC Mp3 Manager December 4, 2013 Added: DirGraph 1.35 and 2.0, Kurlo 1.3, Popcorn 1.99.3, and MSConfig Cleanup 1.5 March 8, 2013 Added: Programs by Patrice Zwenger (CaptureScreen 2.0.4396, Image by Image 1.2.4411, ImageOpen 1.4.4404, WinPing 1.6.4104, WinTrace 1.3.3595, WinHtmlDump 1.1.3603, FFT 1.4.4136, WhoIs 1.5.4093, ServerInfos 1.1.3995, Web-Thumb 1.1.3960, PacketViewer 1.3.3577, DiskAlarm 1.2.4370, NetTraffic 1.2.4147) For a full, alphabetical list of Last Free Versions of software, click here. jv16 Powertools RegCleaner PowerArchiver Next page >>>