Legs on chips soldered together?

[paul773car]

Hi all, is there any reason why someone would have soldered two of the legs together on a kickstart rom on an a1200. It works fine other than an unconnected Video output issue via Composite but I just noticed someone had connected two of the legs.

I have never seen this before and my other 1200 isnt like this

Thanks

Paul

[Jope]

Which legs would those be then?

[Doobrey]

Without a piccy I can only guess, but several thoughts come to mind.
1. If they're EPROMS (craploads on Fleabay sold as genuine Kickstarts), it could be that they're larger than 256KB, so a wire could be used to tie the upper address line hi or low, making it act as a 256KB ROM.

2. If it's just on one ROM, it could be a fix for a broken trace on the motherboard. eg. Tieing the Byte/Word pin hi to make it always output 16bits, or tieing the 2 ground pins together.

[paul773car]

Thanks guys they are both done on the same legs, I have put the 1200 back together and I didnt take a note of the legs that were tied. I will have another look tomorrow and report back.

Paul

[paul773car]

Originally Posted by paul773car

Thanks guys they are both done on the same legs, I have put the 1200 back together and I didnt take a note of the legs that were tied. I will have another look tomorrow and report back.

Paul

Well they say tomorrow never comes! I never got round to having a look,

Opened her up today for another reason and while I was there made a note of the legs that were connected.

On closer inspection it appears that the legs have actually been crossed over on leg 3 and 9 counting from top left of the chip. This is on both legs of the chip!

Any ideas as to why?

Paul

[FOL]

Originally Posted by paul773car

Well they say tomorrow never comes! I never got round to having a look,

Opened her up today for another reason and while I was there made a note of the legs that were connected.

On closer inspection it appears that the legs have actually been crossed over on leg 3 and 9 counting from top left of the chip. This is on both legs of the chip!

Any ideas as to why?

Paul

I thought the commodore factory screwed up and messed up the chips.

Like they done with the CD32 Kickstarts in the UK, they had to cut the legs and solder a wire to the rom socket.

[paul773car]

Originally Posted by FOL

I thought the commodore factory screwed up and messed up the chips.

Like they done with the CD32 Kickstarts in the UK, they had to cut the legs and solder a wire to the rom socket.

That would make sense in a way as they doesnt appear to be any malfunction with them like this.

Thanks

Paul