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Hi everyone! I wanted to let you all know that I am thinning the herd and currently have some choice items up on eBay: Apple Lisa Mouse - original mouse...

Exactly what chips would I need, or better yet, is there anyone here that could burn me a set? I tried to 'fix' the broken legs on the one ROM, but they were eaten away right up to the chip itself.

This is very cool! I have one with a slightly later dated ROM - but one of the ROM's is buggered due to a nice battery explosion taking out 3 of the pins. The ROM is Rex v8 1.0A3 9/22/90. Perhaps I can burn the dump above into 4 new chips and run the slightly older ROM.

Great vid - thanks for sharing @Alex.  I have always been looking for the official tool that I used to use in the Apple Canada service shop, but they are hard to find.  This video takes away some of the apprehension of building my own.  Cheers!

Small update here to my unit with the 1985 date.  I popped out a ROM OO 342-0077-A from a production IIgs that I have and popped it into the empty ROM slot of this proto - IT LIVES!  Speaker works but makes a lot of static.  However, there is life - at least in boating up.  Now, if I could only...

Very cool indeed Hux!  I was wondering... could you please post more pix of the unit itself?  Interested in seeing the bottom and rear. Have you dated this by serial number yet? how old is the OS disks? thanks

So, I got around to troubleshooting the one of my two LC protos that powers on, but only gives a strange video on screen.  The battery had blown up on the board, and fried one of the ROM chips - at least the pins are affected!  Figures - one of the 4 pictured below - can you tell which one?  The...

Thanks for the feedback everyone.  The mystery with this unit here is that, contrary to all else posted in this forum and found online (whose boards have a 1986 date), this one of mine has a 1985 - so pre-Vegas units, for sure.  I find details of development of the IIgs sketch at best online...

I know that this thread is old, but I thought that I had better chime in too.  I have a real head scratcher then - a IIe case, a IIgs board within.  ROM is missing completely.  The Board is marked with the SKA321-03 but with a 1985 date!  Also, the board is blue!  The thing powers on and shows...

The only markings were on the back - 100036, as pictured above.  jraust - would really love to see pix of your unit in here.  I thought that I had the only 2 that were known about.

I have had these things for years.  Mine came from the warehouse clear out from Apple Canada.  I worked there in the late 90's.  They were clearing out all kinds of stuff, and I decided to grab it all (for a fair lot price) in hopes of one day making a museum.  Life happened, so the museum did...

This is not a definitive photo comparison between proto and production, as I think there is one other proto board in between these.  I have two LC proto's that have the reset button (where the production does not), but the config of VRAM and RAM and VSLU of what is the production board pictured...

Dog Cow - thanks for the expert confirmation  of the ROM - helps round out the history and description of these machines.  Not sure how to take your other comments about "end up in the hands of people who are not equipped", etc.  This is why I have come to this forum, and why the other...

olePigeon, thanks for chiming in.  Information I gathered from emails exchanged with Jerry Manock, who was the case designer, confirmed that these were likely just after the Twiggy and just when they started to use the Sony drives.  Manock stated to me that there were likely soft tooled, just...

Dog Cow - thanks for the info.  Now to really get together some old Mac's and 400K floppies!  Have to get MacsBugs installed on one with a system.  Maybe too, I can boot from the internal floppy with the system I have, then run an external floppy with MacsBugs, and CopyROM (thanks @LaPorta) for...

Hi everyone - the story still is unfolding on this and the other unit that I have - truly Prototypes as most of you confirmed - for sure.  They have 512K RAM, to boot!  I have a question though.  Two actually:  Could anyone tell me what to use and how to read the serial number from the logic...

 in the new thread as indicated, but I wanted to add some new data that I have uncovered to "close the case" so to speak.  Both units have the #6 revision logic board as per folklore.org.  Part number 820-0086-00.  May 1983.  ROM 7's so close to final os possible, but the Sony drives are...

For the original post and more pix of the unit

Hi everyone - still have not had a chance to dive into the repairs - time and money are both short right now.  Anyone in the Ontario, Canada area who may want to lend a hand with their know how?  As for the working 128 Prototype, I did find out some more specifics - actually both of them -...