Hello and thanks for your wonderfull operating system. I am using FreeDOS 1.0 an it really makes me feel being 15 years past in time with my first PC. :-)
The negative point of this is of course the same issue, I had 15 years ago: How do I get most conventional memory for my programs and still have (most of) my drivers running? During the past few days I was searching the internet and learned a lot about DOS and its memory management. I am using this knowledge to set up my FreeDOS: In my "FDconfig.sys" am using "HIMEM.EXE" and "EMM386.EXE" to access the HMA and UMBs, and load DOS into HMA and my drivers via "DEVICEHIGH" and "LOADHIGH" into UMBs. However, the HMA and UMB areas seem not be used completely/efficient so that some optimization might be useful. This results in some questions that I hope you can answer: 1: When calling "mem.exe /all", I get told, that FreeDOS is using HMA, but that there is still 11Kbytes (11359 bytes) free within HMA. Is it possible to load some drivers into this free area of HMA or to use it in some way? 2: I realised that "LOADHIGH" and "DEVICEHIGH" of the original MS-DOS had some extra parameter switches (/L and /S). With these one is able to specify more directly to which UMB the programs shall be loaded. Although "help.com LOADHIGH" does not tell so, "LOADHIGH /?" tells me that these switches also exist in the "LOADHIGH" version of FreeDOS. A simple test showed me, that it seems to work. However, "DEVICEHIGH" does not seem to have these switches in FreeDOS although the original version of MS-DOS seemed to support them. By the way, a short explanation of these switches can be found here: http://www.geocities.com/rick_lively/MANUALS/COMMANDS/D/DEVICEHI.HTM Is the support for these switches still "work to do" or is there some way to specify in what UMB a device driver from FDconfig.sys shall be loaded? I know about the order of loading these drivers, but as it seems, they all want to go into the biggest available block of UMB (although they would also fit into a smaller block). I also remember having read something about a program that lets you load a device driver that originally shall be loaded in FDconfig.sys, from within autoexec.bat (where one might be able to use "LOADHIGH" with swiches). But maybe I just dreamt that!? 3. By setting "DOSDATA=UMB" in FDconfig.sys the "BUFFERS", "STACKS", "FILES" etc. from FDconfig.sys get loaded to UMB (as far as I understand). However they seem to be scattered around all UMBs (and cutting it in half) instead of residing in one small block of UMB. Is it possible to specify to which block they should get loaded (so that bigger contigues UMBs do not get separated into 2 or more smaller blocks?) So you see, my questions pretty much are all the same: How to specify manually to which memory area programs/drivers etc. shall be loaded. I hope you can give me some information about how to answer these questions. Thanks in advance, DENIZ BAHADIR ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
