Re: [PATCH for-9.0] docs/about: Mark the iaspc machine type as deprecated

[Mark Cave-Ayland]

On 27/03/2024 07:09, Gerd Hoffmann wrote:

> On Tue, Mar 26, 2024 at 01:30:48PM +0000, Mark Cave-Ayland wrote:
> > Heh I've actually been using isapc over the past couple of weeks to fire up
> > some old programs in a Windows 3 VM :)
>
> I'm wondering why these use cases can't simply use the 'pc' machine
> type?
>
> The early pci chipsets of the 90-ies have been designed in a
> backward-compatible manner, with devices such as the IDE controller
> being mapped to the standard ISA ioports.  So even an historic OS which
> does not know what PCI is can run on that hardware, by simply talking to
> devices using the standard ISA io ports ...

Hmmm that's a fair point: I think the pc machine has a PCI-ISA bridge included, so 
ISA devices can be plugged in as needed. The reason I ended up on that configuration 
was because I ended up chasing down a regression, and wanted to quickly eliminate 
things such as ACPI.


ATB,

Mark.