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Hello all, Do you believe it is ok to use a normal AA battery in the macintosh plus? I heard and verified that it works, even though the factory one is 4,5V. Do you think there is a downside, other that longevity? Thanks

Sorry I should have mentioned it is dd for windows, and the command is executed without errors (it says 1024+0 records in/out which is as expected for a 1gb image). Maybe it is a bug of dd for windows.

Hello all, I have been using scsi2sd and mini vmac and transferring images back and forth. I think I am doing something wrong with writing sd can using dd, because the mac will not boot. When I write the same image file to the same sd card with balena etcher, it works fine. Could you please...

I really can't understand why someone could go into all that trouble just to patch one or two bytes. Looking at the source code: https://www.bigmessowires.com/rom-adapter/plus-rom-listing.asm , it doesn't even seem to be executable code at that address. It looks more like a table of characters...

Actually that makes a lot of sense. The two differences add up to 0. (0x88+0x88-0x8E-0x82 = 0) So I guess the only thing left is to figure out what is special about rom offsets 0xfbc9, 0xfc3b

Hello, I am uploading a 2nd dump, this time with the factory lo ROM in the factory slot. The good news is that the 2 exported files have indeed a different checksum, so I guess the mod does in fact work and perform some patching. Update 1 - There are two bytes changed in total, and both of...

What you mean is to try it with the mod removed? This is my current setup. The original LO rom chip is in the factory socket and the plus works normal. Also, doesn't the mac test the rom checksum during startup? If yes, why don't I get a sad mac icon? If it is of any use, the seller told me...

Actually, the rom sizes are different. My export is exactly 128kb, however mac plus roms I find on the internet are a few kb longer. Wht?

@cheesestraws , @johnklos I managed to export it. When doing a get-filehash, the exported one is different than the one I have in mini vmac. So i guess this confirms that some sort of rom patching is performed. Also, why would someone sand off the markings on the small IC...

I read in another thread that macs sold in japan had an eeprom expansion to accommodate for fonts. Being that the computer was sold in greece, could it be that the distributor did the same with greek fonts? I do not care much about the card. The only reason I would dump it is if it could be...

Hello all, I just bought a used mac plus. can someone help me identify this addon? It looks as some kind of rom expansion. Functionality-wise it does not make any difference. thanks

Yes, I know about your project and I am monitoring it. Good luck with that

I used what Greaseweazel project refers to as the F1 "direct-connection" board. It is a STM32F103C8T6 chip also known as bluepill. However, I was not able to source this blue pill board locally, so I used another one (no name) which has the same chip. The pinouts are located elsewhere on the...

Hello all, just wanted to say I had success in reading and writing 800k disks for my mac. Of course credits go to the developers of the above programs. I am more than happy to make a simple guide if there is interest.

Thanks for your reply however, cost is not the issue. It is the shipping delays I am worried about. I am still waiting for my scsisd which I ordered about a month ago (france->greece). Arduino boards are all around...

Hello all, browsing the internet I have found a few projects for creating a pc-interface in order to read a 800k disk (low level magnetic flux transitions). A couple of them are arduino based but are targeted towards amiga disks (e.g. https://github.com/RobSmithDev/ArduinoFloppyDiskReader). Do...

Hello @erichelgeson. I am interested in purchasing a pre-assembled kit if one is available, and I am more than happy to help with the project such as trying out new firmware etc. Nice work, keep it up!

@bibilit I think I will probably leave it the way it is until the new caps arrive.  @desertrout I've read online that most (not all) of the latest platinum models do not have the 1mb nameplate. I am 99% sure that the mouse is beige, because the insides change in the platinum version. The inside...

Thank you all so much for the information and comments on the photo. @JDW great work on your videos, keep them coming! I purchased a capacitor set from console5.com. I don't know if they are any good or if they are tantalum, I should have asked here before. Anyways. I am happy with my purchase...

Hello, thank you both for your advice. I have already watched JDW's videos. Unfortunately he deals with US boards which differ at least from my board, in respect to the quantity and type of caps used. Do you think it will be ok to use the pc for a few days with the rifa's in this condition...