EXOS have a support for a relocatable modules, header 02h
1) little code needed which is using EXOS 30 for load the remaining code from relocatable module
2) IS-BASIC extension also using relocatable modules, these are handled with simple LOAD command. Then needed to write the thing as new BASIC instructios or functions.

EXOS have a support for a relocatable modules, header 02h
1) little code needed which is using EXOS 30 for load the remaining code from relocatable module
2) IS-BASIC extension also using relocatable modules, these are handled with simple LOAD command. Then needed to write the thing as new BASIC instructios or functions.

I know, header 02H, once in a time I decoded the "Mordon's quest" adventure only searching for the vocabulary, at the end I found the game rules and the map.... Without EXDOS controller, only tape and a printer, with a Basic listing, reading the flow of 1s and 0s. I was very young and used to thought that I was the only Enterprise owner in Spain. Today I have less knowledge than then...

Recently I have also decoded the first version of the Mouse.xr(extension relocatable) driver. But this time searching the memory of the emulator...


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I don't want to load Basic extensions, I like the code to run on all Enterprises. But we lack the utility to make relocatable modules.

I remember another app decoded with the emulator, it was that Joystick driver listing submitted by an user to a Dutch magazine.

On classic times it must have been a very normal application. Why it still doesn't surface?

It is a good challenge, if I decoded the game with a Basic listing, another listing is enough to do the encoding task. Then, once Ziiiped, it can make the task at a reasonable speed. Needed are two binaries of the same file compiled at different addresses, one of them at 0000h.

Thanks! It can make the experiment more weird, even without the first absolute address at the start....

Simple program to create EXOS module type 7 (relocatable extension):

Working!

With an Hex editor, I have changed the module type to 02 on byte 1 on the header of the dbasx.xr file created by Zozo. I have also put 0FFh on bytes 4 and 5 of the header(no offset). It has loaded correctly without installing the extension.

-Is this the procedure?

I tried the same, it is even in reloc.cpp as commented out code, but type 2 modules apparently need to be written as BASIC extensions, I do not know how to do that, so I changed it to type 7.

-How can I create raw machine code with sjasm? The executable file is not admitted by reloc.

There is a simple example in the .zip file and also Zozosoft's dbasx extension, you need to compile reloc2.s or dbasx2.s to create a file that is accepted by reloc.exe. reloc2.s contains only these lines:
The actual source code is in reloc.s, the reason why it is compiled in two instances is that reloc.exe needs this to find the absolute addresses (16-bit words) that require relocation.

I tried using ASMON in the past to assemble relocatable modules (it was to play around with some BASIC extensions actually). I used .CSEG and .ASEG but I found that it didn't work properly for me (I seem to remember that it didn't write the last byte properly or something). Maybe I was doing something wrong.

But... did you know that Hisoft Devpac will create relocatable modules? And it automatically knows which values are addresses and which aren't. I used it several times successfully to create relocatable modules.