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TI Logo II


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#1 videofx OFFLINE  

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Posted Tue Oct 2, 2018 3:32 PM

I just found a Logo II cart in my goodies. When I try to use Logo I get this crazy screen.

 

Attached File  IMG_3254.jpg   2.19MB   2 downloads

 


Edited by videofx, Tue Oct 2, 2018 3:32 PM.


#2 arcadeshopper OFFLINE  

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Posted Tue Oct 2, 2018 4:10 PM

dirty cart? cart port?  



#3 Ksarul OFFLINE  

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Posted Tue Oct 2, 2018 6:51 PM

Also make sure you have your 32K turned on--it needs it.



#4 videofx OFFLINE  

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Posted Tue Oct 2, 2018 6:55 PM

Also make sure you have your 32K turned on--it needs it.

 

 

Yup I knew it needs the 32K :)

 

I found the problem.  I guess the Logo II uses or tests more of the memory than the Editor Assembler. When you do a size in XB, you see the extra memory and when I use the Editor/Assembler it works but NOT with Logo II. I replaced the memory in the PEB with a new 32K module and it works! Also it works with the Sidecar 32K arcadeshopper sold me

 

So do I just throw out the bad 32k or is it worth fixing providing we can figure out which chip(s) are bad?


Edited by videofx, Tue Oct 2, 2018 6:57 PM.


#5 Ksarul OFFLINE  

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Posted Tue Oct 2, 2018 7:05 PM

Even if the card is bad, there are those of use that use the clamshells. . .

 

It is a pretty easy card to fix too. Run a memory test on it and see where the problem lies. CorComp's diagnostics module will help there (and it runs in the Final GROM or the FlashROM if you have either of those).


Edited by Ksarul, Tue Oct 2, 2018 7:05 PM.


#6 videofx OFFLINE  

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Posted Tue Oct 2, 2018 9:26 PM

Even if the card is bad, there are those of use that use the clamshells. . .

 

It is a pretty easy card to fix too. Run a memory test on it and see where the problem lies. CorComp's diagnostics module will help there (and it runs in the Final GROM or the FlashROM if you have either of those).

 

 

My Finalgrom isn't working but when I get it working I will load CorComps digs then find the chip or chips and replace them. Thanks!



#7 RickyDean OFFLINE  

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Posted Wed Oct 3, 2018 6:01 AM

 

 

My Finalgrom isn't working but when I get it working I will load CorComps digs then find the chip or chips and replace them. Thanks!

If you do find bad dram chips, be sure to place a socket there, as you remove them. Makes it easier in the future to replace the chip if it goes bad again.



#8 videofx OFFLINE  

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Posted Wed Oct 3, 2018 6:59 AM

If you do find bad dram chips, be sure to place a socket there, as you remove them. Makes it easier in the future to replace the chip if it goes bad again.

 

 

 

Thanks! Thats a good idea!



#9 videofx OFFLINE  

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Posted Wed Oct 3, 2018 7:01 AM

 

 CorComp's diagnostics module will help there (and it runs in the Final GROM or the FlashROM if you have either of those).

 

I found this, is this the correct GROM?

 

 

CorComp Peripheral Diagnostic Module

#10 arcadeshopper OFFLINE  

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Posted Wed Oct 3, 2018 11:09 AM

i have 4164's and 4116's at arcadeshopper.com if you need them



#11 Ksarul OFFLINE  

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Posted Wed Oct 3, 2018 5:57 PM

That's the one. . . the CorComp has some useful features that aren't part of the TI Diagnostics cartridge.



#12 videofx OFFLINE  

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Posted Thu Oct 4, 2018 12:22 PM

i have 4164's and 4116's at arcadeshopper.com if you need them

 

Thanks  Greg

 

I have a ton of 4164s/ I will have to open the memory cart and see what chips it uses



#13 videofx OFFLINE  

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Posted Thu Oct 4, 2018 12:22 PM

That's the one. . . the CorComp has some useful features that aren't part of the TI Diagnostics cartridge.

 

Thanks Ksarul I will download and test



#14 arcadeshopper OFFLINE  

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Posted Thu Oct 4, 2018 1:23 PM

 
Thanks  Greg
 
I have a ton of 4164s/ I will have to open the memory cart and see what chips it uses

It uses 4116s but you can modify the 4164s to work longer and cooler

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#15 videofx OFFLINE  

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Posted Thu Oct 4, 2018 1:26 PM

you can modify the 4164s to work longer and cooler

 

 

 

Great! can you tell me how to modify the 4164's?

 

Thanks



#16 arcadeshopper OFFLINE  

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Posted Thu Oct 4, 2018 1:28 PM

 

 

Great! can you tell me how to modify the 4164's?

 

Thanks

 

 

http://atariage.com/...610186&hl=+4164



#17 videofx OFFLINE  

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Posted Thu Oct 4, 2018 2:00 PM

Thanks Greg! 

 

Easy enough

 

I will run the memory diags as soon as I get a new FinalGROM 



#18 videofx OFFLINE  

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Posted Sat Oct 6, 2018 6:29 PM

anyone know where I can get the documentation in English? the FTP only has other languages. Was there a companion disk?

 

Thanks



#19 videofx OFFLINE  

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Posted Fri Oct 12, 2018 8:47 PM

I have run several 32K memory testers and they all say the 32K is good and passes but Logo won't run so I know something is wrong. Do I just replace all the 4116's?



#20 Ksarul OFFLINE  

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Posted Sat Oct 13, 2018 7:24 AM

I would probably try replacing the 74LS245 on the memory card, followed by the 74LS244s. It may be that the memory itself is good, but the bus interfacing is marginal enough that it works for some things and not for others.



#21 videofx OFFLINE  

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Posted Sat Oct 13, 2018 9:12 AM

I would probably try replacing the 74LS245 on the memory card, followed by the 74LS244s. It may be that the memory itself is good, but the bus interfacing is marginal enough that it works for some things and not for others.

 

 

Thanks! I will start with those and socket them

 

I will keep you posted!






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