Discussion: Rygar AGA Edition

[Retro-Nerd]

Sure a standard 2 button Joy (or Master System compatible) need to work.

I will try your ADF later with my Tecno Plus 511. Haven't tested the official ADF yet. Only via WHDLoad on my A1200, ClassicWB 3.1 Lite.

[mcgeezer]

Here is what is happening...

If I write $ff00 once to POTGO ($dff034) after I have shut down the OS and interrupts then on real hardware nothing can be read from POTGOR for the second button. If I don't write the $ff00 then the second button can be read.

The opposite is true on WinUAE, I have to write $ff00 to initialise the output pins as described in the HRM... if I don't then I can't read the second button.

So this is something of a paradox at the moment.

I've also confirmed nothing is being written to POTGO ... with WinUAE... with

w 0 $dff034 2 ALL

[ross]

Originally Posted by mcgeezer

Here is what is happening...

If I write $ff00 once to POTGO ($dff034) after I have shut down the OS and interrupts then on real hardware nothing can be read from POTGOR for the second button. If I don't write the $ff00 then the second button can be read.

The opposite is true on WinUAE, I have to write $ff00 to initialise the output pins as described in the HRM... if I don't then I can't read the second button.

So this is something of a paradox at the moment.

I've also confirmed nothing is being written to POTGO ... with WinUAE... with

w 0 $dff034 2 ALL

Graeme, have you had the chance to try my test ADF on your real Amiga 1200?
Do you have a standard 2 buttons Joy?

[mcgeezer]

Originally Posted by ross

Graeme, have you had the chance to try my test ADF on your real Amiga 1200?
Do you have a standard 2 buttons Joy?

I haven't tried it yet Ross... but I will in around 15 mins my friend.

I'm keen to get to the bottom of this in the source code.

[ross]

Originally Posted by mcgeezer

I haven't tried it yet Ross... but I will in around 15 mins my friend.

I'm keen to get to the bottom of this in the source code.

Well, if it works, simply delete all $dff034 accesses

[jotd]

ross you're probably right with those. Now IIRC I had to fix most games that originally supported 2 buttons. Ex: Banshee: button only worked once. There are others. Skeleton Krew is another one, with a more subtle bug.

The problem is not new. Thanks who? Damn Commodore.

[mcgeezer]

@ross...

Tried the 2nd button test you put in the zone... same thing on my hardware, it doesn't register the second button at all.

This is really really weird. I may need to sleep on it.

So the situation is... if I write either ($ff00 or $c000) to $dff034 it won't work on real hardware but does on WinUAE. It is the only write I am doing in the game when it is initialised...there are no other writes to $dff034 which I have confirmed with WinUAE.

I need to test more, I'm now tired and confused.

[ross]

Originally Posted by mcgeezer

@ross...

Tried the 2nd button test you put in the zone... same thing on my hardware, it doesn't register the second button at all.

This is really really weird. I may need to sleep on it.

So the situation is... if I write either ($ff00 or $c000) to $dff034 it won't work on real hardware but does on WinUAE. It is the only write I am doing in the game when it is initialised...there are no other writes to $dff034 which I have confirmed with WinUAE.

I need to test more, I'm now tired and confused.

Yes, better sleep on it
But sure your joystick is standard? (can be that 2nd button is simply broken?)
EDIT: check 2nd button -> pressed on -> PIN9 tied to ground(PIN8) -> POTGOR(bit14)=0 if POTGO($Fx00)

A $ff00 to $dff034 and no other writes MUST work...

[ross]

Originally Posted by jotd

The problem is not new. Thanks who? Damn Commodore.

Yes, I really fail to understand why changed POTGO handling from KS2.0..

[Retro-Nerd]

I can confirm. Even using the ADFs (official Final and the 2nd Button Test from Ross) the second button of my Techno Plus pad doesn't work. The CD32 pad though has no problems with the blue button for jump. Strange.

[ross]

Originally Posted by Retro-Nerd

I can confirm. Even using the ADFs (official Final and the 2nd Button Test from Ross) the second button of my Techno Plus pad doesn't work. The CD32 pad though has no problems with the blue button for jump. Strange.

This is interesting.
Do you know how is internally wired?

[Retro-Nerd]

Haven't opened it. But it's 100% compatible to all Amiga games with official 2nd button support i've tried so far.

[ross]

Originally Posted by Retro-Nerd

Haven't opened it. But it's 100% compatible to all Amiga games with official 2nd button support i've tried so far.

I'll make a bootblock for you to check if button is working (with exact Rygar setup).
Please wait.

[mcgeezer]

OK... here I've uploaded a debug version of Rygar.

This adf writes nothing to POTGO, it therefore works with my SEGA pad as button C.

If I then plug in my Monster Joystick which is compatible with Amigas it registers the button press once and then sticks (probably due to lack of bits 15 and 14 pulled up on POTGO).

This is really odd behaviour.

Could I ask that some people test this who were having the problem previously and see if it now works.

http://109.228.4.199/Rygar_test.adf

You will see in the debug I am monitoring all of the inputs for POTGOR. normally is should be $5500 and when the button is pressed should go to $1500 to indicate bit 14 is clear.

Graeme

[Retro-Nerd]

Originally Posted by mcgeezer

Could I ask that some people test this who were having the problem previously and see if it now works.

http://109.228.4.199/Rygar_test.adf

You will see in the debug I am monitoring all of the inputs for POTGOR. normally is should be $5500 and when the button is pressed should go to $1500 to indicate bit 14 is clear.

Graeme

Download doesn't work for me.

[mcgeezer]

Originally Posted by Retro-Nerd

Download doesn't work for me.

Apologies...try it again.

[Retro-Nerd]

This adf writes nothing to POTGO, it therefore works with my SEGA pad as button C.

If I then plug in my Monster Joystick which is compatible with Amigas it registers the button press once and then sticks (probably due to lack of bits 15 and 14 pulled up on POTGO).

This is really odd behaviour.

Yep exactly the same happens here using my Sega 6 button pad and the Tecno Plus.

edit: But i've seen this specific before in B.C. Kid.

[mcgeezer]

Originally Posted by Retro-Nerd

Yep exactly the same happens here using my Sega 6 button pad and the Tecno Plus.

edit: But i've seen this specific before in B.C. Kid.

But you have amiga games that are none whdload modified that work with these sticks with two buttons?

I’m now starting to think that these sticks are not compatible with the amiga.

[ross]

Or simply need different setup.
You should look inside as they are wired.

In the mean time I've found an absolutely strange behavior from WinUAE:
Debugger doesn't see this write to $0:

		suba.l	a0,a0
		move.l	#$01800000,(a0)+

EDIT: ok, 040/060+MMU problem, all ok on 000-030+MMU, I've to warn Toni

[Retro-Nerd]

But you have amiga games that are none whdload modified that work with these sticks with two buttons?

Yes, none modified games. There are games which have official 2-button support. Some of these games indeed work out of the box with a specific 2-button stick/pad, others just with the Mega Drive pad (C-Button). It's confusing. And WHDLoad patched games behavior is sometimes completely different.