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North Hedge Ned

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    Ontario, Canada
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    Vintage Tech

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  1. 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!
  2. 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 find that original ROM daughter card that it would have likely used back then - good luck, right?
  3. 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
  4. 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 dirtiest, 3rd from the left. So, I pulled the ROM chip - carefully, and 1 pins remained in the socket, and 2 simply fell off. They were corroded. I have thoroughly cleaned the board, dried it well with air, and had a thought. Before the though,... the report: one pin is half there, one pin still h
  5. 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. Anyone have any input on the dev timeline, and where this 1985 board may fit in?
  6. 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 an odd video image, no doubt due to the missing ROM. Have a look! I will write more about this in my blog at http://techcollector.northhedge.com/blog where I write about each of the finds in my heap.
  7. 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.
  8. 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 not. Now I have the need to sell it all off as it is taking up so much room - so there are these and a few other goodies that I didn't even know that I had really, until now when I really get a good look at them. Both power supplies are shot on these things, but using my working one from my LCIII, one
  9. 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 on the right. Likely there were several board revisions prior to release. Just filling in the gaps
  10. 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 contributors assisted in understanding what these computers are.
  11. 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 before they ramped up the Freemont factory. Since the logic boards are the same versions as the Twiggy, my two system are likely former Twiggies with the innards changed (Sony ROM too) and a different faceplate, of which has PTA Prototype stamped inside of it too. The Sony drives are not full release ei
  12. 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 that link. Below are photos of each of the 512K adapter board that is on the logic board of these units. Any clues here without running MacsBugs?
  13. 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 board like the modern System Profiler? I want to know what serial number can be pulled from the logic. Secondly, is there a software that I can run on the unit that will copy the ROM 7.0 off the daughter card? I would like to be able to have the ROM locked in time and preserved. Thanks in advance.
  14. 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 pre-release. Waiting to hear back from first-hand sources on then they figure these units place in the timeline - likely the start of the Sony drive option process. As others have pointed out: The cases are genuine prototypes, even the venting is different between Twiggy units, mine, and production 128's. L
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