MC6802 or MC6808?

arakisssun

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I want you to ask something that cannot understant.
I see that my HIGH SPEED pinball use for CPU section MC6802(but at the schematic it's 6808) and for SOUND section-MC6802(I think that is correct because at the schematic is writen 6802/6808 that's mean that I can use one of the two types microprocessor)
The game work correctly but I'm confused and with this:

I have and PINBOT pinball too,I try to swat the two CPUs from the CPU section(and the two of them its writen 6802).But when I place the CPU from the PINBOT in the socket of HIGH SPEED,game boot but some crazy things-like buzzy sound,and the knocker knock on every second until 5sec. and the games stuck.

1.Why this is happened?
2.Can I use really MC6802 like CPU for CPU's section or not?
3.What is the difference between teo processors?
4.What is the difference between 6802P and 6802CP?Cab I use it too like same type?

I read and this:

WILLIAMS LEVEL 11 - 11C (USES 2 PROCESSORS)

THIS SERIES OF CPU'S WILL ACCEPT EITHER 6808/ 6802 AT U15, (THE CPU SECTION) OR U24 (THE SOUND SECTION), WITH NO JUMPERS INVOLVED.

OF COURSE, THERE IS ONE SMALL EXCEPTION. WILLIAMS DOES MAKE A JUMPER DESIGNATION FOR THE LEVEL 11 SERIES USING EITHER 6808/ 6802. IT CONCERNS THE JUMPERS W16 (FOR U15) AND W17 (FOR U24). THESE JUMPERS ARE USED WHEN THE 6808/ 6802 IS MADE BY MOTOROLA.
 
You shouldn't have a problem using that. I do it all the time.
 
The 6802 has internal RAM and the 6808 does not. That's the difference. If you're going to use a 6808 in a circuit that was previously using a 6802 you'll need to also install a 6810 RAM and jumper accordingly.

You can't swap them around and expect everything to work. You could drop in a 6802 in a 6808 circuit and it would probably work but you would have 2 RAMs in parallel. Putting a 6808 in a 6802 circuit won't work without external RAM, like I said above, unless the code doesn't use the RAM but that's not going to be the case in a pinball MPU.

6802P and 6802CP should be interchangeable. The difference should be the material the case is made from. I would have to check the data sheet but I'll guess one is ceramic and the other is plastic.

EDIT: if in doubt check the data sheet(s)
 
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The 6802 has internal RAM and the 6808 does not. That's the difference. If you're going to use a 6808 in a circuit that was previously using a 6802 you'll need to also install a 6810 RAM and jumper accordingly.

You can't swap them around and expect everything to work. You could drop in a 6802 in a 6808 circuit and it would probably work but you would have 2 RAMs in parallel. Putting a 6808 in a 6802 circuit won't work without external RAM, like I said above, unless the code doesn't use the RAM but that's not going to be the case in a pinball MPU.

6802P and 6802CP should be interchangeable. The difference should be the material the case is made from. I would have to check the data sheet but I'll guess one is ceramic and the other is plastic.

EDIT: if in doubt check the data sheet(s)

+1, great explanation!
 
The 6802 has internal RAM and the 6808 does not. That's the difference. If you're going to use a 6808 in a circuit that was previously using a 6802 you'll need to also install a 6810 RAM and jumper accordingly.

You can't swap them around and expect everything to work. You could drop in a 6802 in a 6808 circuit and it would probably work but you would have 2 RAMs in parallel. Putting a 6808 in a 6802 circuit won't work without external RAM, like I said above, unless the code doesn't use the RAM but that's not going to be the case in a pinball MPU.

6802P and 6802CP should be interchangeable. The difference should be the material the case is made from. I would have to check the data sheet but I'll guess one is ceramic and the other is plastic.

EDIT: if in doubt check the data sheet(s)

Thanks for explaining that I'm sure I would have gotten to it but it was toooo early in the morning when I wrote that plus...I had no coffee..
 
Ok I understand but I mean this:

HIGH SPEED CPU's section is now with 6802P and works without problem.
PINBOT CPU's section is with 6802P too and it work withouth problem.

But when I get the CPU from the PINBOT and place it in HIGH SPEED thing go creazy.
What can be this?
 
Ok I understand but I mean this:

HIGH SPEED CPU's section is now with 6802P and works without problem.
PINBOT CPU's section is with 6802P too and it work withouth problem.

But when I get the CPU from the PINBOT and place it in HIGH SPEED thing go creazy.
What can be this?

Does the High Speed MPU work otherwise? Is it configured for a 6802?
 
Yes it work.As I said before it works with its 6802,but not with the 6802 of the PINBOT:).This is strange.What is the configration to work with 6802?
 
What is the configration to work with 6802?

I took a look at the schematics for both MPUs and realized that they've got the RAM enable pin of the CPU connected to ground with no jumper (pin 36 of the CPU). That means that whatever processor you use (6802 or 6808) it will behave like a 6808 and use the external RAM. That doesn't explain why you're seeing the issue you are but it does negate what I said earlier about jumpers for 6802/6808. That's not the case with system 11.
 
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