[syslinux] COM32 question

[ganapathy murali krishnan]

I am new to 32-bit programming in DOS. So this might be a stupid question.

How do I access an absolute memory location in my COM32 code. If I 
understand it correctly, all the memory addresses use virtual addresses. 
I need to write code to read an absolute location in memory

Is it as simple as

answer = *(unsigned char *)MK_PTR(seg,ofs)

or does the fact that the COM32 code is runing using virtual addresses 
complicate matters.

- Murali