So air cooled models are the only ones worth getting then?

I, too, have an LCS-equiped G5 (it's a Quad as well). It won't cool the CPUs (so it's basically useless because it overheats before it gets anywhere). At least it's not leaking. c

techknight said: Well the backlit has a timing requirement of 0-wait states. Meaning the DTACK has to be handled almost instantly upon a chip select or address strobe. Cli…

I didn't have any luck finding them on his page either... I went to an locally owned Ace Hardware here in Boise to get some keys cut for work and found some brown 3M replacements …

Thanks y'all! I was afraid when I saw the box, I figured it would be full of broken plastics, as brittle as the casing can get!

I found the designing cards and drivers for macintosh family online.  It appears BOTH the portable and backlit portable GLU will only decode and DTACK 5MB of address space. So for…

the UDS/LDS data strobes go low after valid data is on the bus to be written. So when these lines get toggled, and address strobe gets toggled for a write, I know then that the dat…

Well the backlit has a timing requirement of 0-wait states. Meaning the DTACK has to be handled almost instantly upon a chip select or address strobe. When I am outside of the 5MB …

Just checking to see if I understand this. On one Portable type (non-backlit) there's an ASIC which does house-keeping for RAM accesses.   When the RAM address space is accessed, …

I am. There was a video card I think . Hap has one

OlePigeon, thanks. Yeah, a food dairy. Now the places he goes to eat are going to think he's a food critique. Falen5, What you think, ROM issue or corrosion on the sockets and …

I am not aware of anything ever using the PDS slot on a portable. 

So a full upgrade plus empty PDS slot? Was there good PDS upgrade board or something useful?  If so, this RAM upgrade would be quite popular!

Really? Hap has a rom card. For one of his portables.

And this is the reason why. So they can decode the entire address space and use up all 9MB.  But I wont need to do that. all the address/data lines are broken out at the RAM conne…

Some portable ram upgrades are in the Pds slot and not the ram slot

I got the CPLD development breakout board on the way along with the JTAG. Once I get the RAM from trag, ill mount those up on a TSOP to DIP Adapter then I can make a simple wire-wr…

Terrific job cleaning it up and getting something that nice and useable out of it. Glad that the shipping worked out.

5 Meg total.  That explains the logic ICs near the 8 PRAM ICs on the backlit portable, that logic circuitry decodes the 1 Meg of onboard memory, plus it handles the DTACK and 0-wa…

is that 5 meg plus the one onboard or 5meg total? great progress .

Glad to hear he's OK.  Looks like he'll have to keep a food journal, narrow it down.

A nice find.

ok, I answered my own questions. I found this note:  http://cdn.preterhuman.net/texts/computing/apple_hardware_devnotes/Portable%20(BackLit).pdf this basically explains the diffe…

The question is.. why cant you interchange? The bus is the same... The max ram also should not matter. The core chips are the same. Gttmfh only discussed one slot. And they dont …

Yes, I have a liquid cooled too, and I'm trying to repair it :–( I believe it's a Quad-Core.