Author Topic: CPC 464 does not respond to fire button on Joystick port  (Read 368 times)

0 Members and 1 Guest are viewing this topic.

Offline Dansbo

  • CPC464
  • **
  • Posts: 4
  • Country: dk
    • Awards
Cheers!
I have just bought myself a CPC 464 again. This was my first real Microcomputer when I was a child so it is with great nostalgia that I got it to work.
Though I am having an issue with my joystick port. I have tried several joysticks but to no avail. All is good receiving directional input but nothing happens when I press the firebutton. I have confirmed on my C64 that the fire button is functional.

As far as my research has gotten me, is to find out that the fire button should be connected to pin 6 on the joystick port.With a multimeter I can confirm that there is a connection between pin 6 on the joystick port and pin 10 on the AY-3-8912. As far as I can see, there is no corrosion. Do you think I need to replace the AY-3-8912? Sound generation is flawless under normal circumstances.
As far as I can figure the AY-3-8910/8912/8913 are in the same family. Are they all interchangeable? Do you have any recommendations regarding "brand new" AY-3-8912 from China?
Any suggestions would be appreciated
like
0
No reactions

Offline eto

  • Supporter
  • 6128 Plus
  • *
  • Posts: 568
  • Country: de
    • Awards
Re: CPC 464 does not respond to fire button on Joystick port
« Reply #1 on: 21:04, 02 November 21 »
Do the keys K,F,J,D,A and L,H,G,S work? If yes, then the AY works fine.
like
0
No reactions

Offline Dansbo

  • CPC464
  • **
  • Posts: 4
  • Country: dk
    • Awards
Re: CPC 464 does not respond to fire button on Joystick port
« Reply #2 on: 21:25, 02 November 21 »
Do the keys K,F,J,D,A and L,H,G,S work? If yes, then the AY works fine.


Yes they work fine. The joystick port is C64/Atari compatible right?


Do you perhaps have any other ideas?
like
0
No reactions

Offline Dansbo

  • CPC464
  • **
  • Posts: 4
  • Country: dk
    • Awards
Re: CPC 464 does not respond to fire button on Joystick port
« Reply #3 on: 22:42, 02 November 21 »

Yes they work fine. The joystick port is C64/Atari compatible right?


Do you perhaps have any other ideas?


How embarrassing....


I looked up and just tried to connect pin 6 and 8 on the port, which worked straight away.
Tried yet another joystick and that worked fine. So I will see if there's something I can do to my zipstick to make it work.


Thanks for your help.
like
0
No reactions

Offline eto

  • Supporter
  • 6128 Plus
  • *
  • Posts: 568
  • Country: de
    • Awards
Re: CPC 464 does not respond to fire button on Joystick port
« Reply #4 on: 22:59, 02 November 21 »

The CPC doesn't provide 5V and depending on the autofire circuit, this can have side effects. Did you try autofire on/off?
like
0
No reactions

Offline Dansbo

  • CPC464
  • **
  • Posts: 4
  • Country: dk
    • Awards
Re: CPC 464 does not respond to fire button on Joystick port
« Reply #5 on: 23:37, 02 November 21 »
The CPC doesn't provide 5V and depending on the autofire circuit, this can have side effects. Did you try autofire on/off?


Yeah I tried that.
Thanks for the 5v hint. Will surely look into it
like
0
No reactions

Offline Devlin

  • CPC6128
  • ****
  • Posts: 166
  • Country: gb
    • Magicbane
    • Awards
Re: CPC 464 does not respond to fire button on Joystick port
« Reply #6 on: 12:02, 03 November 21 »

Yeah I tried that.
Thanks for the 5v hint. Will surely look into it


Yep. Most joysticks with auto-fire will not fully work correctly - in some cases they are fine when the auto-fire is off, but in some cases they won't work at all (like my QJ SuperStar which literally has a switch for CPC operation and still won't play nice)
« Last Edit: 17:47, 03 November 21 by Devlin »
like
0
No reactions
Amstrad fan! | CPC464 + USIfAC II | Administrator of Amstrad Discord : https://discord.gg/ksWvApv