Problem Joystick/Ports

geldo79 · 20 June 2021, 15:32

Hi,

I want to use two Atari-7800 controllers with my amiga. In my game, i test bit 7 of $bfe001 for fire-button of port1, and bit 6 of $bfe001 for fire-button of port 2. But only the controller connected to port 1 is working correctly. On port 2, the fire-button will not be detected. Using a competition pro on port 2 is working without problems. Is there a difference in the two ports? Do i have to modify my A7800 controllers to be compatible with both ports?

Greetings Christian

Photon · 04 August 2021, 20:08

It could be a hardware problem, but this is quickly tested in another two player game. (Plug in both joysticks and try to pinpoint a fault with a joystick or a port.)

Can you post code and tell us how often it's read and if system interrupts are on? You are testing the correct bits, so if it doesn't work something weird is going on. One weird things that could prevent a pin from working is if you set its direction to output. But you only have to set direction in a boot ROM, at all times when using the Amiga, no program has to set any of that stuff.

Toni Wilen · 04 August 2021, 20:22

Sounds like usual input vs output mode problem.

Does it work if you set bit 7 of $bfe201?

Photon · 04 August 2021, 22:00

Toni found out the game loads from a dos disk and turns off OS, I think it's either timing or explicitly setting direction.

Maybe it's fixed already

saimo · 04 August 2021, 22:11

Edit: nevermind, for some weird reason I ended up thinking of button 2.

Photon · 04 August 2021, 23:53

Yeah, after boot you don't have to do anything special, just read the inputs.

and this is after boot, so it's something else I think.

Bruce Abbott · 05 August 2021, 00:02

Quote:

Originally Posted by geldo79

Hi,

I want to use two Atari-7800 controllers... Using a competition pro on port 2 is working without problems.

Which 7800 controllers do you have?

20 June 2021, 15:32	#1
geldo79 Registered User Join Date: Oct 2019 Location: Eydelstedt / Germany Age: 44 Posts: 114	Problem Joystick/Ports Hi, I want to use two Atari-7800 controllers with my amiga. In my game, i test bit 7 of $bfe001 for fire-button of port1, and bit 6 of $bfe001 for fire-button of port 2. But only the controller connected to port 1 is working correctly. On port 2, the fire-button will not be detected. Using a competition pro on port 2 is working without problems. Is there a difference in the two ports? Do i have to modify my A7800 controllers to be compatible with both ports? Greetings Christian

04 August 2021, 20:08	#2
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602	It could be a hardware problem, but this is quickly tested in another two player game. (Plug in both joysticks and try to pinpoint a fault with a joystick or a port.) Can you post code and tell us how often it's read and if system interrupts are on? You are testing the correct bits, so if it doesn't work something weird is going on. One weird things that could prevent a pin from working is if you set its direction to output. But you only have to set direction in a boot ROM, at all times when using the Amiga, no program has to set any of that stuff. Last edited by Photon; 04 August 2021 at 20:13.

04 August 2021, 22:11	#5
saimo Registered User Join Date: Aug 2010 Location: Italy Posts: 787	Edit: nevermind, for some weird reason I ended up thinking of button 2. Last edited by saimo; 04 August 2021 at 23:27.

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04 August 2021, 20:22	#3
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,507	Sounds like usual input vs output mode problem. Does it work if you set bit 7 of $bfe201?

04 August 2021, 22:00	#4
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602	Toni found out the game loads from a dos disk and turns off OS, I think it's either timing or explicitly setting direction. Maybe it's fixed already

04 August 2021, 23:53	#6
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602	Yeah, after boot you don't have to do anything special, just read the inputs. and this is after boot, so it's something else I think.

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