formatting MFM drives on a IBM PC

Jules Richardson jules.richardson99 at
Thu Sep 28 19:12:22 CDT 2017

On 09/27/2017 09:59 AM, Ethan via cctalk wrote:
> The idea of IDE, as my understanding, is the controller that existed as an
> ISA card was moved onto the actual drive, and then what became the
> controller was mostly just extending the ISA bus over to the drive.

I actually have an IDE "controller" somewhere which is just a tiny PCB with 
an ISA connector on one side and a 40 pin IDE connector on the other, along 
with a couple of ICs (presumably buffers/latches, but I don't know without 
finding it).  It's somewhat unusual, given that IDE ports were normally 
included as part of multi-I/O boards, or (a little later) often 
incorporated into the motherboard.

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