Jump to content

a few decades too late, an Adam question


Recommended Posts

What's the deal with the two hidden keyboard keys that are only revealed when the case is opened?

That is a good question around which may theories swirl. Actually I think there are some pretty good theories, but at the moment I am blank on remembering them.

Link to comment
Share on other sites

Special function keys, probably, that were never implemented in the final product.


According to my recollection of poring over the keyboard 6801 disassembly by Chris Braymen, they are not even decoded in the row/column matrix (i.e., pressing them is not detected, and no ASCII code is assigned to them). It would not surprise me, however, if there were development versions made for R&D internal use for debugging prototype systems, to trigger breakpoints. (Some of you might remember that old Macs had "programmer buttons" on the side that could break into a running program and dump you into a debugger.) Or perhaps they were used in some final hardware test of the key/matrix units before they were assembled into cases.


I will dig out my 6801 listings and take a closer look. It has been over a decade...


*Dr. D.*

  • Like 1
Link to comment
Share on other sites

  • 3 weeks later...

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.

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.

  • Recently Browsing   0 members

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