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From: rbowman <bowman@montana.com>
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Subject: Re: Floppies
Date: 16 Sep 2025 19:48:04 GMT
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On Tue, 16 Sep 2025 12:44:31 +0200, Carlos E.R. wrote:

> On the PC the format was handled in software (BIOS or even userland), so
> I understand that the number of formats it can handle is infinite.

https://www.alldatasheet.com/datasheet-pdf/pdf/129527/NEC/UPD765A.html

The PC originally used the UPD765. 

https://www.isdaman.com/alsos/hardware/fdc/floppy.htm

There were limitations.