Jump to content
Sign in to follow this  
mimo

Help with 1200 XL please

Recommended Posts

My newly acquired 1200XL arrived this morning.
As far as I know, this has had no modifications as yet.
The XL powers up and I get the ATARI logo on screen, should I be able to do anything else?
I put a River Raid cart in, but the start, option select etc do not work!
any pointers where I should start looking for the fault? I'm guessing that the answer is going to be that the keyboard is f.u.b.a.r, but hoping for a cheaper fix!

Share this post


Link to post
Share on other sites
[quote name='mimo' post='1312614' date='Mon Jun 11, 2007 7:06 AM']My newly acquired 1200XL arrived this morning.
As far as I know, this has had no modifications as yet.
The XL powers up and I get the ATARI logo on screen, should I be able to do anything else?
I put a River Raid cart in, but the start, option select etc do not work!
any pointers where I should start looking for the fault? I'm guessing that the answer is going to be that the keyboard is f.u.b.a.r, but hoping for a cheaper fix![/quote]

The Atari Logo on the screen is a good sign. There is no basic built into the 1200xl, thats all it does when you power it on without a cart or disk.

The keys not working are a common problem with 1200xl. You can try giving them a work-out, press em kinda hard, you may get em working. If not, you can try the keyboard tune-up.

[url="http://www.retrobits.net/atari/keyboard.shtml"]http://www.retrobits.net/atari/keyboard.shtml[/url]

Share this post


Link to post
Share on other sites
[quote name='mimo' post='1312614' date='Mon Jun 11, 2007 4:06 AM']My newly acquired 1200XL arrived this morning.
As far as I know, this has had no modifications as yet.
The XL powers up and I get the ATARI logo on screen, should I be able to do anything else?
I put a River Raid cart in, but the start, option select etc do not work!
any pointers where I should start looking for the fault? I'm guessing that the answer is going to be that the keyboard is f.u.b.a.r, but hoping for a cheaper fix![/quote]

The 1200XL will give you the Atari rainbow logo screen if nothing is attached, as the 1200XL does not have the test mode and built-in Basic that the 600/800XL's do. I would insert a Basic cartridge and test all the keys on the keyboard. The 1200XL's were notorious for oxidizing contacts in the keyboard causing intermittent key failure. Look at my 'sticky' post in this forum for the common repair for the problem. Hope this helps.

Share this post


Link to post
Share on other sites
If you can press the HELP key at the rainbow atari screen you should get into the XL self test, where you can test all the keyboard keys. I seem to recall that the 1200XL version of the self-test types something besides COPYRIGHT etc... (???)

Share this post


Link to post
Share on other sites
[quote name='mimo' post='1313255' date='Tue Jun 12, 2007 10:40 AM']unfortunately the "silver" keys are the most dead :sad:[/quote]
Not stating the obvious (you are probably already aware of it), but in the sticky thread there is an extensive and thorough description of how to fix the 1200's keyboard. I would also suggest that you measure the traces of the mylar foil with a multimeter. They might have oxidated to the point that they are no longer conductive. Because of the matrix-like shape of decoding the keyboard, this would lead to whole groups of non-functioning keys.

re-atari Edited by re-atari

Share this post


Link to post
Share on other sites
[quote name='re-atari' post='1313340' date='Tue Jun 12, 2007 3:17 PM'][quote name='mimo' post='1313255' date='Tue Jun 12, 2007 10:40 AM']unfortunately the "silver" keys are the most dead :sad:[/quote]
Not stating the obvious (you are probably already aware of it), but in the sticky thread there is an extensive and thorough description of how to fix the 1200's keyboard. I would also suggest that you measure the traces of the mylar foil with a multimeter. They might have oxidated to the point that they are no longer conductive. Because of the matrix-like shape of decoding the keyboard, this would lead to whole groups of non-functioning keys.

re-atari
[/quote]

Bugger - I just read all of this and realised my 1200XL is now the same... :roll:

Share this post


Link to post
Share on other sites
[quote name='JayoK' post='1324823' date='Sun Jul 1, 2007 3:11 PM']Bugger - I just read all of this and realised my 1200XL is now the same... :roll:[/quote]
Here is a (badly scanned) partial schematic that shows how the keyboard matrix and CD4051's are wired to POKEY.

[attachment=80188:Pokey_Keyboardscan.gif]

Sadly the individual keys are not marked here, hope it helps anyway.

re-atari

Share this post


Link to post
Share on other sites
[quote name='re-atari' post='1324826' date='Sun Jul 1, 2007 2:38 PM']Here is a (badly scanned) partial schematic that shows how the keyboard matrix and CD4051's are wired to POKEY.

[attachment=80188:Pokey_Keyboardscan.gif]

Sadly the individual keys are not marked here, hope it helps anyway.

re-atari[/quote]

Thanks - I'm gonna get all the stuff together and give it a bash.

Share this post


Link to post
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.

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...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...