abb_inth.c: check all interrupt causes, not just one The original code used if - else if - else if etc constructs, thus the first detected interrupt was the only one handled. However, Iota ITSTATREG is a clear-on-read register, thus if we only handle the first detected interrupt and skip checking the others, then the other interrupts will be lost, if more than one interrupt happened to occur in one ABB interrupt handling cycle - a form of rare race condition. Change the code to check all interrupts that were read in this cycle.

/*
 * This C module is a reconstruction based on the disassembly of
 * os_mis.obj in frame_na7_db_ir.lib from the Leonardo package.
 */

/* subset of included headers from COFF symtab: */
#include "nucleus.h"
#include "typedefs.h"
#include "os.h"
#include "gdi.h"
#include "os_types.h"
#include "os_glob.h"

extern unsigned os_tick_to_time_multiplier;

GLOBAL LONG
os_GetTime(OS_HANDLE Caller, OS_TIME *Time)
{
	UNSIGNED Value;

	Value = NU_Retrieve_Clock();
	*Time = SYSTEM_TICKS_TO_TIME(Value);
	return(OS_OK);
}