undefined | Better HN

0 pointstachyonbeam5y ago0 comments

What happens if you try to read from a null pointer in DOS?

0 comments

I haven't actually tried this, but based on my understanding of the MS-DOS memory model it should read the contents of memory at address 0.

This is correct, and address 0 is the start address of the interrupt vector table, so there are good reasons why you might read from it.

pas5y ago

You get what is at 0x0000 ?

j / k navigate · click thread line to collapse

0 pointstachyonbeam5y ago0 comments

What happens if you try to read from a null pointer in DOS?

vngzs5y ago

I haven't actually tried this, but based on my understanding of the MS-DOS memory model it should read the contents of memory at address 0.

This is correct, and address 0 is the start address of the interrupt vector table, so there are good reasons why you might read from it.

pas5y ago

You get what is at 0x0000 ?

j / k navigate · click thread line to collapse