Jump to content
IGNORED

Confused by the CONSOL usage


robus

Recommended Posts

To elaborate, CONSOL controls a 4-bit bidirectional port which is similar to PIA port A in output mode with output bits inverted. Output bits set 0 pull up the signal line, while bits set to 1 ground it. Thus, it's necessary to clear output bits 0-2 to read the console buttons, or else GTIA itself will pull down the lines and they'll read 0 regardless of the button state.

 

  • Like 2
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...