Real Mode DOS build tools

[guyenMasm]

Anyone knows a tools masm32 or something that lets me to compile and link in DOS real mode? I needed because, I am doing PCI enumeration SMBUS related applications and any bus request is not working in DOS Virtual Mode which is expected. Thanks!

[MichaelW]

You need to be able to assemble and link under real-mode DOS, or just create real-mode DOS applications?

[guyenMasm]

You need to be able to assemble and link under real-mode DOS, or just create real-mode DOS applications?

yes former is true, I wanted to assemble and link under dos mode.
i am writing PCI enumeration application that runs in dos mode, but doesn't work on virtual mode. So I have to reboot to dos everytime I run or debug the application, if I compile and link in windows. that is why.

[sinsi]

Have a look for a driver (e.g. GIVEIO.SYS) that will let a user-mode program access I/O ports in 2000/XP.
This will let you fine-tune the actual PCI I/O and makes writing a DOS program much easier...

[japheth]

Have a look for a driver (e.g. GIVEIO.SYS) that will let a user-mode program access I/O ports in 2000/XP.
This will let you fine-tune the actual PCI I/O and makes writing a DOS program much easier...

Or just use HX in plain DOS (http://www.japheth.de/Download/hxrt.zip

[sinsi]

Or just use HX in plain DOS (http://www.japheth.de/Download/hxrt.zip

So this will let you run ML and LINK from DOS (i.e. DOS 6.22) - no Windows?

[japheth]

So this will let you run ML and LINK from DOS (i.e. DOS 6.22) - no Windows?

It should at least - who needs this Widows crap? :8)

[MichaelW]

guyenMasm,

NASM is one possibility. The DOS versions, both the assembler and the disassembler, are 16-bit DOS programs. The most recent version is available here:

http://www.kernel.org/pub/software/devel/nasm/binaries/dos/

The NASM32 project includes some useful macros that should work with the DOS version:

http://www.asmcommunity.net/projects/nasm32/

Neither of the packages includes a 16-bit linker. NASM can create a COM file directly, but to create a (proper) EXE you must have a linker.

[guyenMasm]

thanks all, I actually found the masm611 that installs and builds under real mode.