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LC 475 Project - Upgrades - Mods

falecore said:
LC475 full 040 running at 41Mhz with Spicy O'Clock. Got the full 040 off ebay from that chinese rare chip seller dude bro for $50. I used thermal tape and put a 6100 heat sink on it. Need to swap out out the clock chip to get Appletalk and TCP/IP working. Otherwise solid. (photo image)
Click to expand...


I see the Spicy o"clock (looks cool) in the photo, but when you say you used "a full 040" and the photo has a LC 040, isn't the model of the 040 one without the FPU? Same as mine? Correct me if I'm wrong. Unless you've posted an older photo?

I found this person on ebay.ca - https://www.ebay.ca/itm/385679628138

Is the seller you were talking about?
 
register said:
Just depress option-cmd while opening the control panel »memory«. You will get an additional pair of radio buttons to choose wether to perfom a RAM check upon startup or not (see attached screenshot).
View attachment 74987
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I don't remember seeing that option, except on a few macs here and there. I've always heard that you couldn't disable it, due to it being embedded in the rom (hench the upgraded ROM being able to disable it).
 
aeberbach said:
I like the BlueSCSI because there is a companion board called "EasyOver" that lets it plug into the 25-pin connector on the back of the Mac. On it I have all the software I don't want on every machine but can easily connect and copy it over when needed. Inside the machine I like the SCSI2SD because it fits more nicely into the HD area. The BlueSCSI is based on an Atmel chip which is faked really often by dodgy resellers - I had one BlueSCSI that was not good and I suspect the Atmel "Blue Pill" part wasn't real. I have another which is fine.

The ROM drive is just like a small hard disk.

The Noctua fan... now that I look I cannot find a Noctua 60mm fan with 15mm depth. I'm going to have to leave that to someone else to clarify.
Click to expand...
Unfortunately Noctua does not make a fan that fits the pizza box Macs. But there is a 3d printable frame that allows you to put a smaller quieter Noctua fan in the case, with similar CFM

Printables

www.printables.com www.printables.com
 

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SIMM are either 5V or 3,3V. You need to know the exact typ of the chips to determine and read datasheet.
In this offer the type is not readable, so you have to ask the seller.
Some seller tell that 3,3V SIMM will work in 5V computer (as the 475) as well. Usually this is out of specification.
There are a few SIMM that have 3,3V chips and voltage regulator on board (but they don't work at 3,3V anymore)
So I would not trust that they are 5V and 3V.
 
Last edited:
E.g. https://www.ebay.de/itm/155176081322
is using KM44V16104 chips, which are 5V tolerant at data and address lines but need 3,6V max supply voltage.
So they may work in a 5V system but are clearly out of specifications.

Answer of the seller was:
"We tested these 3.3V chips on 5V applications over the years and had not any issue."

Not my way to do so.
 

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