Of course, I cannot say whether or not the PowerBook 540 (or a similar model, with System 7.5.3) would be able to read a floppy created on the very first Macintosh under an old operating system, but the 400K format as such at least seems to be OK. This gives the disk drive access to the Figure 1-1 An 800K floppy disk. It was even possible to create a 400K disk image in Disk Copy 6.3.3, using the Create Image from Disk command (in the Image menu), and to make a new sector-copied 400K floppy from this image (via Make a Floppy in the Utilities menu). Floppy disks that are formatted to run on PC computers ( and typically running. The disk was recognised as 400K by Disk Copy 4.2.
The disk appeared properly on the Desktop, and the files were readable. Two files (SimpleText and a document) were copied to the floppy.įinally, the (400K) floppy was brought back to the PowerBook 540. The diskette was successfully formatted 400K (single-sided). Now, two choices were given, single-sided or double-sided.
The machine was immediately booted with extensions off. Next, a PowerBook 140, with System 7.1 (Swedish including the System Update 3.0) was used. The dialogue box appearing upon diskette insertion allowed 800K only. Then, the aforementioned PB 540 was started with extensions off (in order to exclude PC Exchange). This was not possible the only Macintosh option was 800K. To begin with, an attempt was made to format a 2DD (DSDD) diskette as 400K in a PowerBook 540, running System 7.5.3 (US), via Erase Disk in the Special menu. The following notes, from an experiment that I carried out a couple of years ago, could possibly be of interest: If you experience success or failure please share it for the broader community.If I may add a comment to the information already provided by Grant.Įxpect some differences even when using earlier operating systems. This is a list of drives confirmed to work with the replacement gear.
You can find a video of this replacement gear in action here. I have iterated on several prototype designs and feel you will like this design, but please consider this design "beta". Extra Large (12 Gears) (LuDiCrOuS MoDe!!!)ĭo you like free STL files more? Or maybe you can think of an improvement? Head on over to Thingiverse and download the STL or the source (Solidworks.so I recommend buying the largest option and giving these to anyone who needs one! I'm making all variants available with a $0.50 markup over the manufacturing cost.Īll variants are the same price due to the weird pricing algorithm Shapeways uses. I'm trying to flash boot disks for a Macintosh SE. There are options available today to replace the worn eject-gear in your Macintosh floppy drive, but you may find they cost signicantly more than this listing. Just wondering if anyone knows a place I could buy an 800K (not 720K) Mac floppy disk drive.
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