problems with replacement chips P8048H on the videopac g7400

Started by maeloterkim, March 24, 2023, 12:21:28 PM

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maeloterkim

Hello
I am trying to repair a videopac g7400
and I find the following problem

I know that the fault is the P8048H chip because I have put one from another videopac and it has worked

As I knew that this was the problem, I bought a few chips to solve the problem but when I put them in, none of them worked.

The chip that I have tried from another console and it has worked has the following letters:

P8048h 0872
8839
11 248 22120
intel '77

The chips that I have tried and have not worked are the following:

1) The first one that I have tried and it has not worked is the following:
      P8048H 0596
      8132
      intel '77

2) The second one that I have tried and it has not worked is the following:
     +B8428
     INS8048-6MLL/N
 
The first question is:
Are all 3 chips compatible?

Also searching the internet I have seen that someone sells these chips and says that the bios they have is not compatible with magnavox but perhaps with the European one
 
Should I check if the bios that these chips have is correct?
If they don't have the correct bios, can they be programmed with the correct bios?

thanks

manopac

maybe one thing to note: the 8048h chip contains the ROM ... so if you are not putting the ROM code onto the chip, it will not work ...

(ROM = G7400 Bios)
sex, lies, and videopac

gertk

If you can find a suitable programmer: you can use a 8748 (that is the Eprom version)
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