@ An interrupt handler that simply acknowledges all interrupts
.arm
.global InterruptHandlerSimple
.align
InterruptHandlerSimple:
ldr r2, =0x04000200 @ interrupt enable register location
ldrh r1, [r2] @ load 16 bit interrupt enable to r1
ldrh r3, [r2, #2] @ load 16 bit interrupt request to r3
and r0, r1, r3 @ interrupts both enabled and requested
strh r0, [r2, #2] @ store to interrupt request
ldr r2, =0x03007FF8 @ load bios interrupt request location
ldrh r1, [r2] @ load bios interrupt requests
orr r1, r1, r0 @ or with enabled and requested interrupts
strh r1, [r2] @ acknowlege bios requests
bx lr @ return to bios
.pool