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Hello everyone, very excited to get my first Next machine it's something that I've wanted for a long time. Now I'm sure most of you have seen the listing on eBay for a NextStation Turbo missing all of the internal components except for the logic board and fan (or at least some of you might've)...

Well my original clock chip was very rusty, it worked but I didn't trust it so resorted to that and I've had no issues. As far as compatibility I don't know if that same chip was implemented on the Macintosh Plus I'd have to take both Machines apart to see. Edit: The Macintosh Plus Real Time...

This is what I used, LINK. I've also attached the exact pinout of this chip below, which is an exact match to the original chip's pinout. Here's a photo of the same chip in my 512k board:

Actually I’ve found a drop in replacement for the RTC I have in in a 512k board right now let me get the link for that chip.

These are the full schematics for the 128k and 512k Macintoshes, enjoy.

Here's all I've been able to find schematics wise.

Sorry I meant to post this in my post on the mod I found, My apologies .

Binder has been uploaded: "Apple Service Technical Procedures Volume Six 6"

This guide covers upgrading the Macintosh 128k, 512k, and Macintosh Plus. It covers ROM, hard drive, case, logic board, and floppy drive upgrades, repairs, and troubleshooting. Also covered in this guide is the Macintosh SE and Macintosh II, as well as their accompanying upgrades, repairs, and...

About to upload the Whole binder right now, five minutes and you all will be able to see.

I believe there’s a resistor you can cut for RAM size.

Stay tuned uploading that when I get home from work….

I actually have the full information on these upgrades but haven't yet gotten around to scanning them, here's a brief example of some of the things offered. I'll see if I can at least scan that bit in later today. The whole collection of manuals will be going out to @retr01 to scan and upload...

It would be interesting to hear their perspectives after all of the reverse engineering and understanding they have of these boards now.

I’ll give this a read very neat find @retr01

Just curious if you were to look at say a Color Classic, Color Classic ii, LC475. Lciii/iii+, Classic, or Classic ii/Performa 200 for example why do these machines have the ROM backed out one row over? Was this because Apple considered ROM upgrades or what is the story here, are different chips...

Found the lost software thanks to a previous seller of said card. I left it below in a .zip, also uploading to Macintosh Garden, Macintosh Repository, and Archive.org.

Really neat stuff!

Pretty neat someone did a decent job on this one I’ve seen some that are a mess, the upgraded RAM has very well done joints on the bottom of the board.

I'm 90% sure this is a RAM Mod to upgrade the machine to 512k. Have to appreciate the craftsmanship. Not sure of the true RAM size but if someone knows feel free to comment.