Re: Tom's demons are strong today! Re: RE: Re: Higher Education Is Overrated

On Sat, 28 Dec 2024 12:01:23 -0800, Jeff Liebermann <jeffl@cruzio.com>
wrote:

On Sat, 28 Dec 2024 11:41:13 -0500, zen cycle
<funkmasterxx@hotmail.com> wrote:
>

On 12/27/2024 6:00 PM, cyclintom wrote:

The last board that was laid out by software had an INTERUPT line running to the interupt pin on the microprocessor

>

There is not a microprocessor that has ever been designed with an
"interupt" signal.

>
The Intel 8080 two hardware interrupt lines.  NMI was a non-maskable
interrupt and INTR was a maskable interrupt which has a lower
priority.
<https://www.tutorialspoint.com/microprocessor/microprocessor_8086_interrupts.htm>
>
The later 8085 had 5 hardware interrupt pins.
<https://www.geeksforgeeks.org/interrupts-8085-microprocessor/>

One more.  Every RTOS (real time operating system) has at least one
external hardware interrupt pin.  The purpose of a real time operating
system is to guarantee that every hardware interrupt is serviced
within a specified amount of time.  In a non-RTOS systems, the
hardware interrupts have been expanded and merged with the GPIO
(general purpose input output) pins.  However, Tom is still wrong
because I don't know of any that have only one pin. 


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