Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Matt_H on November 24, 2004, 09:51:54 PM

Title: Core voltage settings on the A1
Post by: Matt_H on November 24, 2004, 09:51:54 PM

My A1 is disturbingly unstable, so I'm looking into the core voltage as a potential problem. It's currently set to 1.59V, and I have no clue if it's correct or not.

It's an XE-G4 model, and the only things printed on the chip are "Motorola", "7450", and "A99236D001".

Anyone know how to decode this into an actual part number I can look up?

Title: Re: Core voltage settings on the A1
Post by: Matt_H on November 26, 2004, 03:54:22 PM

*BUMP*

Anyone?

Title: Re: Core voltage settings on the A1
Post by: nex4060 on November 26, 2004, 05:03:43 PM

try this.. it's for the MPC755 nad MPC745

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MPC745&nodeId=018rH3bTdG8653#Data_Sheets

at first glance is says 2v

Title: Re: Core voltage settings on the A1
Post by: sTix on November 26, 2004, 05:08:44 PM

check this one:

http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=7448&forum=16&35

What cooling do you have by the way? Memory?

Title: Re: Core voltage settings on the A1
Post by: tomazkid on November 26, 2004, 05:43:43 PM

I've got a 7450 too.
Rock solid at 800 mhz with VCore 1.59.
If you get a lot of lockups, causes to look for before changing VCore:

1. Memory

I had loads of lockup-problems with Linux, disappeared with a change of memory.

2. Cooling

Try running at 600 mhz a while, if you get a more stable system, then it seems to be a cooling problem