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        ;; *******************************************************************
        ;; $Id: test.asm 179 2009-04-01 19:48:38Z arniml $
        ;;
        ;; Checks interrupt on JSRP and RETSK.
        ;;

        ;; the cpu type is defined on asl's command line

        include "int_macros.inc"

        org     0x00
        clra

        int_flag_clear
        ;; write return instruction identifier to current M
        ;; ret_instr_1b0 = 0x01
        clra
        aisc    0x1
        x       0

        lei     0x02
        jmp     int_mark_1b0

        org     0x1b0
int_mark_1b0:
        nop
        nop
int_instr_1b0:
        jsrp    prep_0b0
        aisc    0x1             ; to be skipped by retsk
ret_instr_0b0:
        ;; check whether aisc has been skipped
        x       0
        clra
        ske
        jmp     fail
        ;; check whether interrupt really occured
        int_flag_check

        jmp     pass


        org     0x090
        jmp     fail
        org     0x092
prep_0b0:
        nop
ret_instr_1b0:
        ;; check whether interrupt really occured
        int_flag_check

        ;;
        ;; prepare next interrupt
        ;;
        int_flag_clear
        ;; write return instruction identifier to current M
        ;; ret_instr_0b0 = 0x2
        clra
        aisc    0x2
        x       0

        lei     0x02
        jp      int_mark_0b0

        org     0x0ae
        jmp     fail
        org     0x0b0
int_mark_0b0:
        nop
        clra
int_instr_0b0:
        retsk
        

        ;; *******************************************************************
        ;; Interrupt routine
        ;;
        org     0x0fd
        jmp     fail
int_routine:
        nop
        save_a_m_c

        int_flag_set

        ;; access current M of main program
        ldd     3, 14
        x       0
        skmbz   0x0
        jp      check_sa_1b0
        skmbz   0x1
        jp      check_sa_0b0
        jmp     fail

check_sa_1b0:
        check_sa        ret_instr_1b0
        jmp     int_finished
check_sa_0b0:
        check_sa        ret_instr_0b0

int_finished:
        restore_c_m_a
        ret
        ;;
        ;; *******************************************************************


        org     0x200
        include "int_pass_fail.asm"