Author Topic: Neo Geo with blown CPU, would a 68SEC000 have any compatibility problems?  (Read 2238 times)

0 Members and 1 Guest are viewing this topic.

Offline Mechanical Menace

  • Super Contributor
  • ***
  • Posts: 1293
  • Country: gb
Title says it all really. I'm fixing this for a friend whose attempt at fixing it went wrong. He'd rather not cannibalise another console for the part and TBH I don't want to give up my Mega CD so he can have his AES... Yeah enough rambling, does anyone know if there's any compatibility problems between the static core 68000s I can still buy from Mouser and the original dynamic core ones?

Thanks.
Second sexiest ugly bloke on the forum.
"Don't believe every quote you read on the internet, because I totally didn't say that."
~Albert Einstein
 

Offline Gribo

  • Frequent Contributor
  • **
  • Posts: 386
  • Country: ca
The first page of the datasheet says it is a direct replacement, with code compiled for the 68EC000 running without a change on the 68SEC000.
That being said, console games tend to do tricky things with their CPUs which might cause problems with this variant.
 

Offline Mechanical Menace

  • Super Contributor
  • ***
  • Posts: 1293
  • Country: gb
That being said, console games tend to do tricky things with their CPUs which might cause problems with this variant.

That's what I was thinking, and I'm pretty certain even if their was a revision of the 68K that had "undocumented" features that were later fixed it would have been long before the Neo Geo came out. But tbh it could be fun finding out if and how anything is broken.

Thanks.
Second sexiest ugly bloke on the forum.
"Don't believe every quote you read on the internet, because I totally didn't say that."
~Albert Einstein
 

Offline Grapsus

  • Regular Contributor
  • *
  • Posts: 239
  • Country: fr
I have a broken MVS, it was totally beyond repair and I already took a few chips out of it to repair other units. I'll post the exact part number of the CPU if you're interested.
 

exapod

  • Guest
I have a partial working ( no audio but video is perfect) MV1B if you are interested.
 

Offline Mechanical Menace

  • Super Contributor
  • ***
  • Posts: 1293
  • Country: gb
I have a broken MVS, it was totally beyond repair and I already took a few chips out of it to repair other units. I'll post the exact part number of the CPU if you're interested.

The one I've got here was a HD68HC000PS12 so will have to bodge an adapter if I go through Mouser. Have found a Motorola 12 mhz part on ebay I'm going to risk first though.

I have a partial working ( no audio but video is perfect) MV1B if you are interested.

I might PM you about that.
Second sexiest ugly bloke on the forum.
"Don't believe every quote you read on the internet, because I totally didn't say that."
~Albert Einstein
 

Offline marshallh

  • Supporter
  • ****
  • Posts: 1458
  • Country: us
    • retroactive
The "no audio" problems are usually caused by leaking batteries eating through the Z80 bus (sound cpu). Some work with an ohmmeter can usually find the problem(s).

If you need a 68k you can just buy one off ebay for $10.
Verilog tips
BGA soldering intro

11:37 <@ktemkin> c4757p: marshall has transcended communications media
11:37 <@ktemkin> He speaks protocols directly.
 

exapod

  • Guest
The "no audio" problems are usually caused by leaking batteries eating through the Z80 bus (sound cpu). Some work with an ohmmeter can usually find the problem(s).

If you need a 68k you can just buy one off ebay for $10.

The no audio is caused by a blown amplifier, the board was in an old cabinet with a shorted speaker.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf