How is the "load" directive supposed to work?

Hi,

I'm currently trying to generate a basic checksum from a given range of data, (not much really, just a sum of all the bytes in that range), I've come up with a macro like this:

Quote:

macro generate_checksum begin, end {
local current_pos, size, key, x
current_pos = begin
size = end - begin
repeat size
load x byte from current_pos
key = key + current_char
current_pos = current_pos + 1
end repeat
dd key
}

As far as I understand, the above is going to keep looping until size is 0, and keep loading a byte from "current_pos", and then add it to the key variable. Finally, it will place the checksum at that position.

Unfortunately, FASM errors out with:

Code:

flat assembler  version 1.71.22  (16384 kilobytes memory
<file name> [line]:
                load x byte from current_pos
error: invalid macro arguments.

I've checked the manual, and it says:

Quote:

The load directive allows to define constant with a binary value loaded from the already assembled code. This directive should be followed by the name of the constant, then optionally size operator, then from operator and a numerical expression specifying a valid address in current addressing space. The size operator has unusual meaning in this case - it states how many bytes (up to 8 ) have to be loaded to form the binary value of constant. If no size operator is specified, one byte is loaded (thus value is in range from 0 to 255). The loaded data cannot exceed current offset.

It talks about the "current addressing space", but I'm not sure what that means.

-sid123