PCem

In the old days, I worked a lot with 1.2M discs for different fields, games, produced by utilities such as spreadsheets, text editors, disk image creators in ms-two, etc., and when I bought them, so Generally, they came pre-formatted, which saved formatting time if you used several to, for example, make backup copies.

This patch covers those two things:
1- Creation of disk images of "high density - double side" (HD-DD) 1.2MB.
2- You create diskettes and also pre-formatted Zip-100M image.

If it's useful for you, use it!







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Update by adding the 1.68MB and 1.72MB special formats, and verify them
with MS-DOS and Windows 98SE, but if anyone else wants to collaborate
with tests, welcome.




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Useful patch! Though I'd never seen 1.68 nor 1.72 disks! Were they used in regular 1.44 drives?

In the old days i used to play with 1.68M and 1.72M
format using https://en.wikipedia.org/wiki/HDCopy, sure do, this will bring nostalgic memory

omarsis81 wrote: ↑Tue 22 Jan, 2019 6:43 pm Useful patch! Though I'd never seen 1.68 nor 1.72 disks!

IIRC i've only seen those from Microsoft...

If @omarsis81, they were formatted in the 3.5 " 1.44M unit at a capacity of 1.6M, 1.68M and 1.72M with
DOS programs such as HD-COPY, DOS Navigator (a Norton Comander clone, a two-panel file manager
like the Win's Total Commander, which included a formatter), etc.
@dns2kv2, I include a screenshot so we can cry together for nostalgia.

1.68 Mo is Microsoft DMF. IBMs' XDF could go as high as 1860 Ko. The other capacities look liked 2M/fdformat formatted disks.