IRQ jumper settings

  • Thread starter Thread starter Theo & Jan
  • Start date Start date
T

Theo & Jan

Hi,

I am doing a A+ course and need help with the following question:

If 0 is OFF and 1 is ON what would the jumper settings be for a 4 jumper
block on a card that needs to be set to confugure an IRQ of 10? The current
jumper settings are OFF ON OFF ON for an IRQ of 5.

I can not find anything in my handbooks to help me with this question

Thanks
Theo
 
Theo & Jan said:
Hi,

I am doing a A+ course and need help with the following question:

If 0 is OFF and 1 is ON what would the jumper settings be for a 4 jumper
block on a card that needs to be set to confugure an IRQ of 10? The current
jumper settings are OFF ON OFF ON for an IRQ of 5.

I can not find anything in my handbooks to help me with this question

Thanks
Theo
Click to expand...

If pin 1 was on the left hand side, it would be:

OFF ON OFF ON

Basically, the pins are 1, 2, 3 and 4. The corresponding values would be 1,
2, 4 and 8. Therefore the 2 and 8 are what you want to set IRQ 10, meaning
pins 2 and 4 are ON or set.

I hope this helps.

@drian.
 
Actually, in the context/orientation of the sequence he stated:

off on off on
0 4 0 1 = 5

then

on off on off
8 0 2 0 = 10

Given that there is a direct correlation between the jumpers/DIP
switches, binary, and the IRQ.

Just for future reference, you of course know the place values of
binary;
16s 8s 4s 2s 1s


If pin 1 was on the left hand side, it would be:

OFF ON OFF ON

Basically, the pins are 1, 2, 3 and 4. The corresponding values would be 1,
2, 4 and 8. Therefore the 2 and 8 are what you want to set IRQ 10, meaning
pins 2 and 4 are ON or set.

I hope this helps.

@drian.
Click to expand...

~~~~~~
Bait for spammers:
root@localhost
postmaster@localhost
admin@localhost
abuse@localhost
postmaster@[127.0.0.1]
(e-mail address removed)
~~~~~~
Remove "spamless" to email me.
 
Theo & Jan said:
Hi,

I am doing a A+ course and need help with the following question:

If 0 is OFF and 1 is ON what would the jumper settings be for a 4 jumper
block on a card that needs to be set to confugure an IRQ of 10? The current
jumper settings are OFF ON OFF ON for an IRQ of 5.

I can not find anything in my handbooks to help me with this question
Click to expand...

From left to right the jumpers represent the number 8 : 4 : 2 : 1, so
to get 10 you need to set the jumpers to: ON OFF ON OFF
 
I am doing a A+ course and need help with the following question:

If 0 is OFF and 1 is ON what would the jumper settings be for a 4 jumper
block on a card that needs to be set to confugure an IRQ of 10? The current
jumper settings are OFF ON OFF ON for an IRQ of 5.
Click to expand...

For an IRQ of 5, the settings are 0101, which is 5 in binary.

So an IRQ of 10 would use the settings 1010 (10 binary), or ON OFF ON OFF.
 
Theo & Jan said:
Hi,

I am doing a A+ course and need help with the following question:

If 0 is OFF and 1 is ON what would the jumper settings be for a 4 jumper
block on a card that needs to be set to confugure an IRQ of 10? The current
jumper settings are OFF ON OFF ON for an IRQ of 5.

I can not find anything in my handbooks to help me with this question
Click to expand...

Presumably that is binary. i.e. 1s place, 2s place, 4s place, 8s place, etc.
So the IRQ of 5 is 0101, or 4 + 1. In that case, IRQ 10 would be 1010, or 8
+ 2.
 
Back
Top