embedded ICU

Dear all,

Can anyone tell the difference between  8259A ICU and ICU in 80L188EB
embedded microprocessor(inialization and operating procedure )

regards,
fazal

On Nov 1, 9:52 am, faz <fazulu.v...@gmail.com> wrote:
> Dear all,
>
> Can anyone tell the difference between  8259A ICU and ICU in 80L188EB
> embedded microprocessor(inialization and operating procedure )
>
> regards,
> fazal

It has been a long time since I've done a '188 design, but IIRC, the
Intel data sheet describes the differences between the embedded
interrupt controller and the 8259.

And I also seem to remember that the difference (from a programmer's
point of view) was "not much".

G.

ghelbig@lycos.com wrote:
> On Nov 1, 9:52 am, faz <fazulu.v...@gmail.com> wrote:
>> Dear all,
>>
>> Can anyone tell the difference between  8259A ICU and ICU in 80L188EB
>> embedded microprocessor(inialization and operating procedure )
>>
>> regards,
>> fazal
> 
> It has been a long time since I've done a '188 design, but IIRC, the
> Intel data sheet describes the differences between the embedded
> interrupt controller and the 8259.
> 
> And I also seem to remember that the difference (from a programmer's
> point of view) was "not much".

I use the 188ED and the controller is very
similar with a few less registers.  If you're
familiar with the 8259, you won't have any
problems.

On Nov 2, 4:33 am, Jim Stewart <jstew...@jkmicro.com> wrote:
> ghel...@lycos.com wrote:
> > On Nov 1, 9:52 am, faz <fazulu.v...@gmail.com> wrote:
> >> Dear all,
>
> >> Can anyone tell the difference between  8259A ICU and ICU in 80L188EB
> >> embedded microprocessor(inialization and operating procedure )
>
> >> regards,
> >> fazal
>
> > It has been a long time since I've done a '188 design, but IIRC, the
> > Intel data sheet describes the differences between the embedded
> > interrupt controller and the 8259.
>
> > And I also seem to remember that the difference (from a programmer's
> > point of view) was "not much".
>
> I use the 188ED and the controller is very
> similar with a few less registers.  If you're
> familiar with the 8259, you won't have any
> problems.

Hai,

>From the data sheets i learned that the 80L188EB has 2 internal
interrupts and 5 external interrupts.There is no such inialization
register IW1,2,3,4.All it has is interrupt control register1,2,3.

I would like to know whether the interrupt operation of 80L188EB is
same as 8259A.Is the  blocks IRR,IMR,ISR,EOI are functionally
identical with 8259A?

What is the fuction of vector generation logic present in EB?

regards,
fazal