Hi there,
On Thu, 3 Feb 2022, Frantisek Rysanek wrote:
On 3 Feb 2022 at 16:38, Bret Johnson wrote:
In the traditional PC architecture, there are only 16 IRQs (0-15)
managed by two Programmable Interrupt Controllers (PICs). Intel
developed APIC (Advanced Programmable Interrupt Controller) in the
Pentium/multi-processor era (many years ago) ...
I'd say that you do not need to deal with IRQ routing through the
APIC's and serving IRQ's higher than #15.
You do need to talk to the PCI BIOS (int 0x1A) to ...
Thanks to both, for some very useful (and encouraging) feedback.
To all: keep it coming!
Hmm... did you just say that your software can run in Linux too?
Yes, but just because you *can* do something, it doesn't necessarily
follow that you *should*. :)
In that case, why bother to write drivers for DOS ?
New hardware for Linux is probably much cheaper than your time! :-)
The systems I'm supporting are DOS systems. For a number of reasons
the intention is for them to stay that way.
--
73,
Ged.
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