[fasmg] How to declare a "::" label with calculated address?

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VEG

Joined: 06 Feb 2013
Posts: 80

VEG 02 May 2017, 20:22

How to declare a special "::" label with calculated address? Sometimes it is convenient do something like this:

Code:

virtual at 0

pelbl.src::

        file filename
        filesize = $

        ; Parse data here and add some additional external labels
                
end virtual

I've tried something like this:
pelbl.hdr := pelbl.src + 0x40

But it doesn't work. It was planned to use like this:
load test:2 from pelbl.hdr:0

Is it possible to do somehow? It would be convenient for reading some structures from this file.

02 May 2017, 20:22

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 8359
Location: Kraków, Poland

Tomasz Grysztar 02 May 2017, 20:46

The addressing space need to be specified through its own symbol. You can however try something like this:

Code:

label pelbl.hdr at 40h
pelbl.hdr.area equ pelbl.src

to be able to access it this way:

Code:

load test:2 from pelbl.hdr.area : pelbl.hdr

Or something even simpler:

Code:

pelbl.hdr equ pelbl.src : 40h
load test:2 from pelbl.hdr

02 May 2017, 20:46

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