cvs commit: src/sys/dev/disk/fd fd.c fdc.h

Bill Hacker wbh at
Tue May 22 20:33:18 PDT 2007

Petr Janda wrote:
Matt Emmerton wrote:
You may be interested to know that my primary DFly development machine 
is an
AMD Sempron-based system with a BIOS date of late 2004.  This machine 
hardly be considered "ancient", but yet it has ISA slots and numerous 
devices that rely on the ISA bus architecture.

Be careful what you wish for -- removing ISA support will prevent a great
deal of hardware from running DFly, and I don't think anyone is 
in taking that step.

Matt Emmerton
In that case, maybe leave ISA bus support in for legacy, but remove 
support for rare/noone uses ISA based cards.

Many devices that were once on a visible, external, socketed ISA bus card have 
long since moved into ~bridge silicon, and most BIOS (and OS) expect some of the 
key ones to be there - be they emulated, downsized, integrated - whatever, and 
all at far higher speed than the 'real' ISA' bus ever could have reached.

It could be another ten years before that 'worldview' changes. If then.


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