config -writeconf dosbox.conf ?

doesnt that create a new dosbox.conf? I guess im refering to updating an exisiting conf fiel;

well it creates a configfile with the current settings (so that is an update)

I see a couple issues with using it.
Typing all of that out with no kb. Maybe creating a mapper action item to run this command would be possible.
Can only be run in dos prompt, unless the option above would work at any point.
Also where does it update, where the existing dosbox.conf is or where the dosbox binary is? In my case I have a dosbox.conf for every game and its in the game folder (i.e /dosbox/mygame/dosbox.conf)

for cycles and such.. I don't know if it catches the cycles changed with ctrl-f11, but stuff changed with the
config -set "cpu cycles=xx"
should be written out on a config -wc dosbox.conf

Still the same problem with no ability to type that command in and also if i could it wouldnt work while in game.
I am also using the mapper items what you refered to Ctrl-F11 so there would be another problem.

well I could code support for CTRL-f11 to update the internal configuration structure.

For writing out the configfile on a keycombo you have to code that yourself.
I think it will be ~10 lines of code (Add a mapper handler. 1 line. Code the mapper handler so it writes the configfile out (4 lines ?) (the write function can be found in config.com) )

The function in this config.com can update only those 4 lines and leave the rest of the config alone?

No, you misunderstand. What Qbix means is it takes 4 lines to write a mapper handler that writes the configfile.

The config.com writes out the entire file, but that includes the present settings so it doesn't matter. Don't get hung up on just changing a part of the existing file. It's difficult and unnecessary. That's not what you need, just what you think you need.

Pickle - what is the problem you are trying to solve here? When and why would you need to update the config-file from within DOSBox?

I am trying to save some time.

The process for getting games up and running on the GP2X basically involves popping the sd card in and out each time you want to change a setting. The main changes are with cycles and frame skip. Those can be adjusted in game but if want to permanantly save them, you have to pop the card out, find a pc and edit it. I think it would be useful to just hit a button combination and have it autoically write the values back to the file.

Yes, and to do that, you should just write the current settings to the file (if you can't call config.com -writeconf directly, then you can do as Qbix suggested and add your own handler for that same code).

I have no problem creating the mapping, I just need get the data to do the th write.
Your suggestion will probally work.

Pickle - you do know that DOSBox (since 0.70 I think), supports loading multiple configuration files, where each file overrides the previous files settings?

So you could have a "base" configuration, and then 4 different files with different cycle settings in, and 2 files with frameskip settings.

E.g. if you had a file called "cycles3000.conf" and one called "fskip3.conf" you can launch DOSBox like this:

dosbox -conf "base.conf" -conf "cycles3000.conf" -conf "fskip3.conf"

The cycle- and skip-files only need to contain the absolute minimum of lines to set the values. E.g.

1[cpu]
2cycles=3000

and

1[render]
2frameskip=3

Ok I having it working. I made the mapper item that triggers a function that opens the dosbox.conf and overwrites the cycles and frameskip lines in game.
Im using the GFX_SetTitle to get the cycles and frameskip to pass to my write to file function.
Works pretty well I have one minor bug to fix ( if i go from 1000 to 500 i would end with 5000, so i just need to get rid of the extra characters)

Fixed the last problem by just forcing a 4 character width so if I go from 1000 cycles to 500 i will get cycles= 500 instead of cycles=5000. It should be good enough we dont ever need to go above 9999.

Thanks for the ideas, this feature is pretty nice.

I still think you're doing it in a very, very, very bad way. Think about what happens when you simply use the writeconf method that's in DOSBox:

• DOSBox loads its own configuration file.
• You change settings and trigger DOSBox own configuration writing code.
• DOSBox writes its own configuration file.

Since the only thing changed are the settings you want to change, the end result is that only those are changed in the config file. Yes, behind the scenes it's been written from the start, but that doesn't matter.

Doing it that way will ensure that it keeps working even if DOSBox' config format changes (and in fact, the cycles line is one of those that has changed in the current CVS version) and works even if the cycles change from 100 to 100000 (yes, I have certain configs where it's set to 100000 cycles).

You're making things *way* too difficult on yourself and introducing too many opportunities for errors.

yeah your right, Im going to need some help calling the correct code.
I see the CONFIG class with one method RUN.
Is there an instance of this vglobally available somewhere? Or should I delare my own?

Im not getting anywhere with running config.com internally.
But Qbix I dont know if you meant to do this from the beginning. It just dawned on me that I can put your first command suggestion into the autoexec section after the game exe runs. Ive tried it and it does update the correct dosbox.conf file, but as you expected the cycles and frameskip are not updated by the shortcut keys.

Qbix: can you point me in the direction to update the cycles and frameskip so that are written to file?