App to intercept calls to df0

[Mounty]

I'm looking for a program that goes memory resident, intercepts calls to dfo: and instead redirects to df1:

This is for use with my Gotek external adapter.

Is there such a program out there?

[kamelito]

Originally Posted by Mounty

I'm looking for a program that goes memory resident, intercepts calls to dfo: and instead redirects to df1:

This is for use with my Gotek external adapter.

Is there such a program out there?

Don't know but back in the early days of the Amiga 3 1/2 discs were expensive and we used 5 1/4 ones in DF1. As games were banging the HW we solve the problem by switching in HW DF0 and DF1. Then solder 2 wires and we added switcher. (probably also wires cut on the motherboard) if a software does it it will not work with program banging the HW don't know if it can be done by using the MMU for such software. Try Aminet Kamelito

[Mounty]

Probably beyond your average AMOS jockey's capabilities I should think.

[kamelito]

Way beyond you got me.
Kamelito

[Vot]

I would imagine a lot of games bang the hardware and there is no way to do this short of rewriting the game etc. as suggested a hardware hack is the easiest way

[Mounty]

Originally Posted by Vot

I would imagine a lot of games bang the hardware and there is no way to do this short of rewriting the game etc. as suggested a hardware hack is the easiest way

What's all this "bang the hardware" business? What does that mean?

I refuse to believe this is impossible to do in software.

They said that about Relokick....

[Vot]

Originally Posted by Mounty

What's all this "bang the hardware" business? What does that mean?

I refuse to believe this is impossible to do in software.

They said that about Relokick....

What i mean is they may not use trackdisk.device.

If its doable write it then...

[Mounty]

Originally Posted by Vot

If its doable write it then...

Unfortunately writing Amiga code is not my forte (I'm strictly a Java/Android man).

Maybe some kind talented dev would like to help out?

They would be helping the Amiga community enormously, especially the A500 owners.

"MOUNTY YOU'RE JUST TRYING TO ADD VALUE TO YOUR GOTEK ADAPTERS!!!" I hear you cry.

Yes, but wouldn't it be worth it??

[Leffmann]

Originally Posted by Mounty

What's all this "bang the hardware" business? What does that mean?

I refuse to believe this is impossible to do in software.

They said that about Relokick....

It's one of these phrases everyone uses because they've seen someone else use it, and so that's what you're supposed to say. It means to program the hardware directly.

If you have an MMU in the system and can configure it to catch accesses to the hardware, and have it all persist throughout the game, then it can work. Otherwise you have to reprogram the game.

[Mounty]

Originally Posted by Leffmann

It's one of these phrases everyone uses because they've seen someone else use it, and so that's what you're supposed to say. It means to program the hardware directly.

If you have an MMU in the system and can configure it to catch accesses to the hardware, and have it all persist throughout the game, then it can work. Otherwise you have to reprogram the game.

Hey, I ain't no cheerleader, I've been round the block a few times myself, so I don't just blindly repeat things.

Why can't you have software catching accesses to the hardware?

[thomas]

Originally Posted by Mounty

I'm looking for a program that goes memory resident, intercepts calls to dfo: and instead redirects to df1:

This is for use with my Gotek external adapter.

Is there such a program out there?

Those programs which "call" DF0, i.e. use system routines, usually can be made to run from DF1 simply by running them from DF1. You know you even can boot from DF1 if you don't have a harddisk or if you change your harddisk's boot priority below that of DF1.

Other programs which "bang the hardware" stick with DF0. I even doubt that you can do something with an MMU because programs which bang the hardware usually also reset the hardware before they start.

[Mounty]

Has anyone got anything positive to say about this? I'm only hearing doom and gloom so far....

[TCD]

Originally Posted by Mounty

Why can't you have software catching accesses to the hardware?

Because you can directly address the hardware and a lot of games do that. There is simply no layer that can 'intercept' calls as the game just accesses the hardware directly. That's why only a hardware mod will be able to 'fix' that.

Maybe also have a look here to understand what that means: http://eab.abime.net/showthread.php?t=61225

[thomas]

Originally Posted by Mounty

Has anyone got anything positive to say about this? I'm only hearing doom and gloom so far....

Put this at the top of your startup-sequence and see how far you get:

assign df0: dismount
assign df0: df1: path

[Mounty]

Just to change the focus a little, what are we up against if take the "reprogram the game" route.

Is this doable? What are your thoughts on this?

[Vot]

Originally Posted by thomas

Those programs which "call" DF0, i.e. use system routines, usually can be made to run from DF1 simply by running them from DF1. You know you even can boot from DF1 if you don't have a harddisk or if you change your harddisk's boot priority below that of DF1.

Other programs which "bang the hardware" stick with DF0. I even doubt that you can do something with an MMU because programs which bang the hardware usually also reset the hardware before they start.

Don't bother thomas, he clearly doesn't want to hear the actual answer.

Mounty: ask wepl, if there is a way to do it we don't know of, he would know.

[Mounty]

Originally Posted by Vot

Don't bother thomas, he clearly doesn't want to hear the actual answer.

Chill out boss, there's no need for that.

I just hadn't got round to answering yet.

[Matt_H]

Degrader can redirect floppy access. It can be made reset resident so even hardware-banging programs should cooperate with it.

[StingRay]

Also degrader will only work with trackdisk.device loaders, it will fail with hardware loaders. There is no trivial way to intercept all calls to the drive.

[Mounty]

Originally Posted by Matt_H

Degrader can redirect floppy access. It can be made reset resident so even hardware-banging programs should cooperate with it.

Thanks for that!

Originally Posted by StingRay

Also degrader will only work with trackdisk.device loaders, it will fail with hardware loaders. There is no trivial way to intercept all calls to the drive.

Thanks for the info.

You say there is no trivial way.

Is there a non-trivial way?