Developing a bootloader

[Riya Gayasen]

Hi Everyone, 

I am working on a boot loader on assembly language on NASM (Netwide Assembler, int86). Right now, I can do some simple stuff (like displaying a text at boot, etc. ). Does anyone know how to load a  C code from a NASM code during boot?

Thanks

Riya

[Dilawar Singh]

16 bit C-Code calling is explained in their manual. They also have an example for 32 bit. Another approach could be write C code and turn is to assembly and link them together. But this might lead to surprises..

http://www.csee.umbc.edu/portal/help/nasm/sample.shtml
Also http://cs.lmu.edu/~ray/notes/nasmexamples/

gcc has an option -masm which can write the C program to assembly. Check if some version of gcc supports your format. The nasm say that it has intel like syntax. So quickly try with -masm=intel to to turn C -> your formal and link it with main program.

- Dilawar

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Dilawar
NCBS Bangalore