Jump to content
Frankie

Error 140 - SIO framing error

Recommended Posts

I'm getting this error on an 800 with Incognito installed. I'm not sure when it's started as I don't use SIO devices that often. It had been working normally for some time.

Now suddenly anything I try and connect to it I get this error.

 

I don't even know where to start looking. It happens on more then one device and those devices work fine on other Atari machines (800XL/1200XL)

 

Can anyone give me some ideas on where to start looking?

 

Frank

Share this post


Link to post
Share on other sites

I've had SIO issues on 800s due to a bad PIA chip. Unusually high

rate too. Have 3 800s, needed two 68B21 PIA replacement chips

before a disk drive would start booting again. Didn't have a means

to capture the error code itself, sorry. I think it's just early

silicon wasn't up to snuff just yet, have no other reason for it.

Share this post


Link to post
Share on other sites

Check your SIO settings page in the BIOS Setup. Don't use Bluetooth SIO settings for a normal SIO device.

Share this post


Link to post
Share on other sites

could be a timing issue with the dos and the supplied bios... I had that problem with sparta dos and reading certain drive formats on XF551's. the xf's work fine with all other DOS but I am not sure people take into account 50/60 on alot of things these days and close enough means occasional glitches sadly

Share this post


Link to post
Share on other sites

 

Can anyone give me some ideas on where to start looking?

 

 

There can be various reasons for this problem. One is that the baud rate of the main system is different from that of the drive. This is usually an indication that the drive wants to talk in high-speed SIO, but the main system is not. So you are then probably using an incompatible dos with the drive. In general, these devices *should* work fine with the standard Dos 2.0S, but who knows?

 

Another reason might be just too much noise on the SIO bus, e.g. the cable is too long, or broken, or the contacts are dirty.

 

Physically, a framing error indicates that POKEY did not receive the stop bit where it expected it to be, so the serial protocol broke.

Share this post


Link to post
Share on other sites

In my quest to swap out chips the problem stopped. The thing is everything is back the way it was. So for now it's working. I imagine it will startup again and I will have to hunt down the real-culrip.

Share this post


Link to post
Share on other sites

In my quest to swap out chips the problem stopped. The thing is everything is back the way it was. So for now it's working. I imagine it will startup again and I will have to hunt down the real-culrip.

Could very possibly have been due to poor contact between pokey and its socket.

  • Like 1

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.
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...