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.

Here are the eBay photos of it!

I know my backlit ram did not work in my non backlit then was reminded that they were different so I did not interchange at all after that. Also the max ram on each is different. …

Can't imagine someone wanting a card that isn't maxed out. That would just be kinda nuts

Thanks, and dad says thanks!  He's much better today than he was earlier this week, but the hospital would not release him today. He will be released on Monday. It was something he…

I do want to make the card hold at least 8 Megs. But you dont have to populate all 8 megs. if you want just 1 meg, thats fine. put 1 chip on there, etc etc... 

Hi Nicole. Hope your da makes a full recovery girl. Tell him theres a big 'shout out' to him from Ireland and to get himself back here asap - we need his brains!!!! weh hey!

Thats just it, I dont know. Which is why I am debating whether its worth the effort of designing a card or not.  I know I want 2 of them for myself. But the rest, is up to demand.…

Actually, this is Elfen's youngest daughter Nicole while he is in the hospital with a severe allergy reaction he's recovering from. Dad has taught his girls a great deal about comp…

Cheers Elfen. This machine is 1 of a haul of about 20 macs I got from a guy in cork who spent years 'fiddeling' with macs. When I got there they were all in a mobile home, that wa…

trag said: That makes good sense. That's the dream. Run out of chips. Clean out a tiny portion of my attic. They are cool chips. A tiny piece of me squeals, "No, hang on to …

techknight said: The Toshiba has a weird little setup which is A-1, and its shared with I/O16. It appears I/O16 becomes A-1 in byte mode. But A-1 is not A1. And it doesnt rea…