iie aux slot showing errors

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Verault's picture
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Oh your just a kid? Sorry I

Oh your just a kid? Sorry I assumed you were an adult. NO sense at all continuing any dialogue with you. Wish I would have known sooner.. But it makes sense now looking back.

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Verault wrote:Oh your just a
Verault wrote:

Oh your just a kid? Sorry I assumed you were an adult. NO sense at all continuing any dialogue with you. Wish I would have known sooner.. But it makes sense now looking back.

I have done exactly what you want me to do.

 

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Verault wrote:Would you
Verault wrote:

Would you please stop bringing up your incredibly idiotic idea of ripping out perfectly good ram and your pointless and dangerous bias of that brand? Its stupid.. noone agrees with you and it helps noone.

Seriously.  We were just getting back to helpful advice here :/ 

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Seriously? You are now

Seriously? You are now calling people who disagree with your admittedly terrible idea of blanket replacing ram retarded? What the hell is wrong with you? I don't care how much you disagree, that is just plain uncalled for. 

 

 

The ram tests good when the aux card is out. The OP still hasn't even confirmed it's MT ram, yet you focus on that. Even if it was MT ram and it was bad, it would have shown bad when it was tested with the aux card out. The symptoms only occur when an 80 col or extended 80 col card are inserted. In addition, all aux cards work fine in another IIe, eliminating any issue with the ram on those cards. 

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Pointless bickering belongs on Facebook

Can we stop the "replace (or not) the MT RAM". While I too think it is bad advice to randomly replace components without proper testing, there is already ample comment in this thread for posterity to make a reasonable determination.  The reason I love AppleFritter is because here, we are usually focused on simply solving problems. 

 

Since you have tested and/or replaced the appropriate components, the problem seems to be at the board level. I would start checking the traces from the slot next. Tedious but that is the next logical step.  Moving the RAM to sockets might be up next, maybe not a bad thing overall, but I am doubtful it will actually help and is likely to introduce new problems to be solved.

 

 

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The RAM on the motherboard is

The RAM on the motherboard is in fact MT ram. Since the processor is socketed I replaced that. Now the system goes into 80 columns in PR#3 as well as going into 80 columns when I run diagnostic iie 2.1. however diagnostic 2.1 also tells me there is no memory  card found when I select system status.  The onboard test with the auxiliary memory card in still shows ram errors all with a “*” .  *RAM 00111001 for example. Doesn’t the * designate the ram on the auxiliary card not the motherboard? I’m just asking. But everytime I do an onboard test the *RAM error shows differently, never the same. And the card tests fine on another motherboard. Someone mentioned capacitors and the thought of that crossed my mind. Replacing caps isn’t a big deal. I can buzz them off with the Hakko gun easily. Each IC seems to have a “104” axial at it. I have a component tester and could test each after removing. I am limited on my testing equipment and unfortunately have to go about this kind of on the primitive level. 

I appreciate everyone’s input and thoughts trying to help me with this issue. I respect everyone’s personal opinions on how they do things and appreciate you sharing them but please refrain from attacking each other. We’re a very small group and we need to stick together. 

If there’s any more information I can provide I’ll be glad to.

thanks again

CVT
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mochatea396 wrote:...The
mochatea396 wrote:

...

The onboard test with the auxiliary memory card in still shows ram errors all with a “*” .  *RAM 00111001 for example

...

 

Yep, I knew it! This is why I asked you about the asterix in the previous page. Now you can disregard all of the advice having to do with the memory chips on the motherboard.

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Why is it telling me there

Why is it telling me there are errors on the card with the ram when the card tests fine on another motherboard? And why does it show different errors every time I test?

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mochatea396 wrote:Why is it
mochatea396 wrote:

Why is it telling me there are errors on the card with the ram when the card tests fine on another motherboard? And why does it show different errors every time I test?

Because one of the address lines (RA0-RA7) or one of the control lines (RW, RW80, EN80, PRAS, etc) does not have proper connection to your expansion card. One broken trace is enough (somewhere on the mainboard) - it would affect all RAMs and all data bits (so the test result is random - but always correctly indicate the expansion RAM).

Most signals are shared between the expansion RAM and the onboard RAM (data & address lines etc). You now know that all these (shared) signals are generated properly - otherwise you'd see errors with the onboard RAM. But the onboard RAM always tests completely fine. That's why a connection issue is most likely.

There is only a few signals which are specifically generated for the expansion RAM (EN80, RW80). But these originate from the MMU or IOU - which you already swapped with known good ones. So these signals are also generated properly (but might still have a broken trace, so they don't show up at the expansion RAM connector).

There is a few more signals on the expansiom RAM connector (like VID0-VID7). These do not matter for the RAM check (they would only cause issues with video output).

 

So, take your multimeter, have a look at the Apple II mainboard schematics, and then test each connection (resistance) one by one from the expansion RAM connector to its origin (at the MMU, IOU etc). And don't forget to test the ground and +5V pin. Even better: plug the known good expansion RAM card and test each connection from a location on the expansion card to its origin on the mainboard (so you can even exclude mechanical connection issues due to bent/weak/dirty contacts).

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MacFly wrote:mochatea396
MacFly wrote:
mochatea396 wrote:

Why is it telling me there are errors on the card with the ram when the card tests fine on another motherboard? And why does it show different errors every time I test?

Because one of the address lines (RA0-RA7) or one of the control lines (RW, RW80, EN80, PRAS, etc) does not have proper connection to your expansion card. On

 

What MacFly suggests seems like a reasonable step forward.

 

A possible cheat/shortcut first is to just check the slot connector first.  See if you get continuity through for each pin from its source to the top side of the connector where the card goes in.  If the slot connector itself is bad this should find it.

 

Also you might try reflowing any suspect solder joints for parts that might affect AUX memory access.

 

And you can use a similar process to what I suggest for the slot connector above to check the sockets on chips that might affect it.  Probably not the MMU if you've recently socketed it, but any other chips that you'd suspect.  Even if the chip is good, if the socket is bad, it will cause problems, obviously.

 

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I think it would be an

I think it would be an extremely important fact to note if any rework was done to this board.

You mentioned you had talked to the person you bought it from. Did they say they replaced any chips at all?

That would be crucial information to pass along.

Otherwise the assumption would be made that the board has never been worked on since manfacturing  until you received it.

 

Was any work done to the board before you got it?

 

 

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The person I got the board

The person I got the board from said the IOU socket was replaced  because for some reason the IC was sea sawing out of the factory socket. For whatever reason.  I think I can still contact him and ask him if the board was working before or after the socket was replaced. I checked the traces with a meter and I didn’t see anything irregular. Tonight I will check on the schematics  and check the slots  to their destination terminals.  and recheck the work that has been done. (The LS ICs I socketed as well).  Replacing the processor strangely let the machine go into 80 columns though. Perhaps that may have been another problem all in its own I didn’t even know about. 

Thanks again all

Ill try and be more timely with updates. 

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mochatea396 wrote:The person
mochatea396 wrote:

The person I got the board from said the IOU socket was replaced  because for some reason the IC was sea sawing out of the factory socket. For whatever reason.  I think I can still contact him and ask him if the board was working before or after the socket was replaced. I checked the traces with a meter and I didn’t see anything irregular. Tonight I will check on the schematics &nbs

 

 

If there was a problem with one socket, chances are another may also be bad...  and more than one bad socket?  Yeah, it is probably worth a careful look at the rest.

 

 

 

 

 

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I was able to get in touch

I was able to get in touch with the boards previous owner and he said this issue was present before he replaced the socket.  This is an 84 board remember very little is socketed.  The ROMs are socketed but thebsustem wouldn’t boot if there was an issue there.  While I’m checking the traces I’m going to make sure the legs on the slot are physically making contact with the card itself. 

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Since this thread has

Verault and insanitor, your behavior is not welcome here. There are many other ways you could have expressed your opinions without resorting to personal attacks. I suggest you read the Acceptable Use Policy. This is your only warning.

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Dr. Webster wrote:Verault and
Dr. Webster wrote:

Verault and insanitor, your behavior is not welcome here. There are many other ways you could have expressed your opinions without resorting to personal attacks. I suggest you read the Acceptable Use Policy. This is your only warning.

What are you talking about? I am the one who was verbally attacked by that idiot! have you not read the postings? How dare you lump me in with all the horrible things he said?

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Verault wrote:Dr. Webster
Verault wrote:
Dr. Webster wrote:

Verault and insanitor, your behavior is not welcome here. There are many other ways you could have expressed your opinions without resorting to personal attacks. I suggest you read the Acceptable Use Policy. This is your only warning.

What are you talking about? I am the one who was verbally attacked by that idiot! have you not read the postings? How dare you lump me in with all the horrible things he said?

You are both at fault. At any point you could have dismissed his remarks and moved on, but instead you chose to escalate the situation. Calling him an "idiot" again just now indicates that you either do not understand, or do not care about, the acceptable use policy you agreed to when signing up for an account here. It would serve you well to temper your attitude lest you find that said account becomes disabled.

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Dr. Webster wrote:Verault
Dr. Webster wrote:
Verault wrote:
Dr. Webster wrote:

Verault and insanitor, your behavior is not welcome here. There are many other ways you could have expressed your opinions without resorting to personal attacks. I suggest you read the Acceptable Use Policy. This is your only warning.

What a

 

 

 

 

I am sorry you are wrong. Calling him an idiot is as nice as I can get. I have a huge problem with people who give such terrible advice as to lead to new folks breaking and damaging thier equipment because they dont know enough yet to see the advice is horrible. 

Nothing I said crossed any lines so far...

 

But I will say this. If you are a moderator on this board and you have your head that far up your ass that you cant see the writing on the wall,  then allow me to say something you clearly need to hear.. Go forth and fornicate yourself you clueless fool with your beligerant threats.

 

Who allowed you to be a moderator if you arent even capable of doing the job?  

 

Insanitor is clearly just an asshole cut and dry.. but Dr. webster.. your a silly little bitch. Enjoy your little pond.

 

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Hey now...  can't we all just

Hey now...  can't we all just get along?

 

 

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softwarejanitor wrote:Hey now
softwarejanitor wrote:

Hey now...  can't we all just get along?

 

Sadly I think this thread was doomed from the start.

Verault, you'll find that your account has been disabled (as has insanitor's), and this thread has been locked.

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