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Old 03 June 2012, 14:27   #2504
Join Date: Jun 2010
Location: out in the wild
Posts: 1,134
Originally Posted by techguruuk View Post
Thanks Jens. Yeah E123C and E125C are both gone. I'll have to see if I can find that other mod.
The "easy" mod is here:

The "more complicated one" is here:

Originally Posted by techguruuk View Post
Should the 030 CPU be so hot that I cannot touch it though? It is VERY hot. The fact that the problems only appear after an hour or so of use, then go when it's been off and cooled down make me wonder if cooling issues are present?
PGA CPUs don't really have heat issues if they're operated within specifications. Since the 5V rail of the Amiga is only controlled by ageing power supplies, you might want to check how precise the 5V rail is gegulated. Some PSUs deliver over 5.5V on that rail, which results in more heat. I already had to fight with this topic on Micromys V3, where the right mouse button would not work when the Amiga was operated with over-voltage. You'd be surprised how many PSUs deliver too-high voltage.

In any case, I would not expect the CPU to be the problem. Like I wrote a number of times (in other places), Commodore didn't know all the details about their own chipsets, and it's still a trial-and-error job to get a specific motherboard up to date. I could have designed the new accelerators in a way that they are as slow as the old Blizzard boards on chipmem access, but that would have been pointless if mods become necessary on other occasions, such as using higher-resolution and higher-colour screenmodes.

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