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Could it be because the LCS is not connected anymore and AHT is expecting it to be there?

It's pretty impressive! I'd be happy to see how you managed to attach the heatsinks.

This would be a great long term solution. Some people used trimmed air cooled G5 heatsinks with good results.

Thank you all! With those informations, I found out that this item is actually for Quadras and Centris 610. I'm a bit surprised : cooling is only made with a heatsink and a fan. I thought that 50mhz versions of this kind of accelerator required peltier junctions or other aggressive cooling methods.

Hi. I came into the possession of a 68040 based CPU upgrade similar to a Quaddoubler. Could somebody help me find out for which Quadra/Centris model it was designed? The "missing pin" is in the upper left corner, near the C24 mark. Thanks.

Thanks.

Hi. I'm about to get hold of a Powermac G4 (Gigabit). I have access to OS X Server 1.2 install disk, which I successful installed on a Powerbook PDQ a few years ago, but I just realized that the Gigabit G4s require 1.2 v3...  Is it possible to install version 1.2 on a Gigabit G4?  If not, is...

You could also check on the Natami website. It is a project aiming at building a modern 68k Amiga computer. The CPU is emulated within a FPGA and is 68040 compatible. I think I read somewhere that the performances where similar to a 100 (or was it 166?) mhz 68040, which is already quite...

Hi. Only USB keyboard and mice are supported (and only one port is supported). It is indeed a very interesting OS.

Hi. These are the files that were on ftp://ftp.csua.berkeley.edu/pub/jwang/develop/... They don't include the AT&T manual. I never tried the tools. You may try to contact Mark White, the developer behind mpegdec (http://www.jwgdesign.com/mpegdec/). He tried to make a DSP version of his...

It would be easier (!) to find a way the disable the clock-doubler of a Quadra Overdrive Plus, so it would run at the same speed as your bus (50 mhz) with 128k of cache... There was a thread on http://www.nextcomputers.org/forums/ about a guy who made some radical changes to his Quaddoubler...

Full 68040 @ 25 mhz.

The heatsink is glued on the processor. I can't say I'm willing to try to remove it, clean the CPU, and then reattach it. But, changing the fan seems to have solved the problem. It has been on most of the day without any problem.

Both fans are working. I'd be tempted to replace the heatsink/fan on the Quaddoubler, but its somewhat glued on the CPU. EDIT : I replaced the fan of the CPU heatsink with one twice as powerful. So far, it seems to have solved the problem (no crash for nearly one hour while playing MP3s and...

I'm having some problems with a Quadra 660av I left unused for a few months. When I turn it on, it crashes after about 15 minutes of use. Sometimes it simply freezes, sometimes I get an error message ("bus error" or an other one) with the "restart" option (clicking restart won't change...

The same as collecting old 68k mac... Don't you think? ;)

CPU sockets are compatible (not the PDS though) BUT the upgrades won't necessarily physically fit in the case. I once tried to install a Quadra 650 Quaddoubler in a Quadra 660av. Didn't work because it was overlapping the CD drive tray.

I think we discussed that in another thread. At that time, we agreed that the PDS slot in the Q660av was not a real PDS slot... Meanwhile, I've checked the Quadra 660av and 840av Developer Note and found the following information on page 46 : So, yes, the PDS slot in the 660av is a...

I wonder what are the benchmarks of an overclocked 840av (say 48 or 50mhz), with a frontside bus twice as fast...

I had a D-Link DWL-122 usb adapter. The drivers had some issues on Tiger. Basically, I couldn't put my iBook to sleep or disconnect the adapter while the computer was turned on, but it was way cheaper than an airport card. On the other hand, your friend could buy a wifi-ethernet bridge...