Anyway isn't it possible to get PMODE video BIOS routine address by calling special INT 10h subfuncion and then use VBIOS directly from PMODE without switching to RMODE? Sorry for bumping this old thread. I'm definitely not a systems programmer, but ... Since FreeBASIC for DOS uses DJGPP v2, it's a...

Here's a minor update .... Made some more changes recently, compared to last time (including some not explicitly mentioned in source): still technically "qb"-style but using "fblite" for smaller size avoids ch, sp variable names (bad for Linux ELF) fixed accidental numeric liter...

My target environment is a dos emulator used by mobile devices. Specifically, which machines? Which OS? Which emulator? (I assume you mean one of the many DOSBox forks for Android.) I have "aDOSBox" on my Android 3.2 (Honeycomb) Tegra 2 tablet, but it's dirt slow, and thus I never use it....

I've not much experience in the low-level details, so I'm not entirely sure. (Ask on news://comp.os.msdos.djgpp , CWS still hangs around there. He can give a much more precise answer than probably anybody else alive.) But for sure, if you want fastest speed, don't use DOSBox at all! Use something li...

I can't get it to work: 1) It told me to set DXE_LD_LIBRARY_PATH variable: I set it to lib 2) It complained it cannot find LD, I put bin\dos in the path 3) It complained about the file dxe.ld, I added this one: http://www.filewatcher.com/p/djgpp-crx-2.03.tbz.317176/i586-pc-msdosdjgpp/lib/dxe.ld.htm...

So that probably precludes any dead code removal options (--gc-sections and friends on gcc) too. Last I checked, this wasn't supported by BinUtils on any COFF targets, so that won't work here. MS COFF is probably the only COFF target that will get any work done in the future, due to Windows popular...

A .COM isn't the same as a flat binary used for a boot sector because it loads at CS:100h (but a boot sector may not). Though it's still flat format "raw" because there are no relocations. But a .COM is limited to 64 kb in size on disk (though it can access way more than 64 kb of RAM). A n...

I don’t know much about DOSBox, but my quick search shows multiple reports of people using RDTSC and CPUID with it. Given this capability, under DOSBox you should be able to measure the effective clock speed of the processor, emulated or otherwise. ... The above code, running under the Windows XP N...

sir_mud wrote:I found this with a quick google: https://code.google.com/p/mtcp/ but it looks to be written for C++

IIRC, it's written in C for OpenWatcom (and GPLv3), meant for embedding into 16-bit apps only. I've only briefly tested it under VirtualBox + FreeDOS.

I translated this header: http://jafile.com/uploads/sir_mud/dos_tcp.bi awhile back but can't recall what the corresponding library was. May be WATT-32 ? http://www.erickengelke.com/wattcp/ Joshy I think you meant this URL: http://home.broadpark.no/~gvanem/ To quote the author (from comp.os.msdos.dj...

NTVDM DPMI server in Windows XP don't support mapping of physical memory regions (0800h function). Seems, applying of flat frame buffer is impossible there at all. At least, I do not know how to do it. VESA graphics under XP's NTVDM are probably a lost cause (though way better than Vista/7/8). I th...

To angros47: The cause is not in an extender. The matter is that the libraries Pthread and Watt32 used for the organization of a multithreading, are compiled for the processor i686 and contain some instructions specific to Pentium II+ processors. DOSBOX isn't able to execute them therefore there is...

I have cwsdpmi in the DOS directory (path) on the DOS computer but it still doesn't work. I decided to skip FreeBasic on that computer. I now either use FreeBasic in DOS on the Win 98 computer (1.3Ghz 1gb RAM) or in Windows 98 using FB Edit Uh ... try upgrading to CWSDPMI r7, latest JEMM386 (for wh...

Hi, sorry for delay in responding, When I try to compile a program using FreeBasic unzipped on a MSDOS 6.2 machine, I get the error: C:\frebasic\bin\dos\ld.exe: cannot find -lfb But on a FreeDOS machine, after unzipping FreeBasic the code compiles fine. I can think of no obvious reason why it should...

You only "need" BinUtils, specifically the assembler (as.exe) and linker (ld.exe), which should be somewhere in your /fbc/bin/ subdirectory (sorry, can't remember exactly and don't have FBC installed here on this machine). You could probably?? just do "unzip -Cj bnu*.zip *\as.exe *\ld...