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        ;; *******************************************************************
        ;; $Id: int_pass_fail.asm,v 1.1 2006-05-27 19:06:37 arniml Exp $
        ;;
        ;; Provides pass/fail signalling via port D for interrupt tests.
        ;;
        ;; Signalling on D:
        ;;   0x1
        ;;   0x2
        ;;   0x4
        ;;   0x8
        ;;    0xf -> pass
        ;;    0x0 -> fail
        ;;

        ;; catch spurious code execution
        jmp     fail

PROLOGUE        MACRO
        ;; output 0x1 on D
        clra
        aisc    0x1
        cab
        obd
        ;; output 0x2 on D
        aisc    0x1
        cab
        obd
        ;; output 0x4 on D
        aisc    0x2
        cab
        obd
        ;; output 0x8 on D
        aisc    0x4
        cab
        obd
        ENDM


pass:
        PROLOGUE
        ;; output 0xf to D
        aisc    0x7
        cab
        obd
        jp      .

fail:
        PROLOGUE
        ;; output 0x0 to D
        clra
        cab
        obd
        jp      .