No Tasks Seem To Run

Hi !

In the above figure, I used the offset of #-0x0000_0120 from PC to branch to the ISR address (the ISR address is contained in VICAddress which is 0xFFFF_FF00) ! The code seems to work with this setting !

But actually, I expected an offset of #-0x0000_0118 from PC because:

PC is 0x0000_0018 (simple calculation / look at the disassembly window).
PC - Offset should be 0xFFFF_FF00  (or)
PC - 0xFFFF_FF00 should be Offset  (or)
0x0000_0018 - 0xFFFF_FF00 = 0x0000_0118 should be Offset !

But when I try Offset of #-0x0000_0118, the code doesn’t branch to the ISR !

So the magic number is #-0x0000_0120 which is 8 away from #-0x0000_0118 ! Is this a strange feature of the ARM(7) architecture ?

Anyway, see my post on ‘Feb 11, 2022 6:55 pm’ ! Shall I make a new topic / continue on this topic ? Thanks in advance !

Please start a new thread.