dragon-nx32: Add jump to null_handler at 0

Signed-off-by: Tormod Volden <debian.tormod@gmail.com>

diff --git a/Kernel/platform-dragon-nx32/dragon.s b/Kernel/platform-dragon-nx32/dragon.s
index f170ecf..2ec72db 100644 (file)
--- a/Kernel/platform-dragon-nx32/dragon.s
+++ b/Kernel/platform-dragon-nx32/dragon.s
@@ -10,6 +10,7 @@
                .globl unix_syscall_entry
                .globl fd_nmi_handler
                .globl size_ram
+               .globl null_handler
 
                ; exported debugging tools
                .globl _trap_monitor
@@ -33,10 +34,15 @@
                    jmp interrupt_handler               ; 0x10C
                    jmp firq_handler                    ; 0x10F
 
-
        .area .text
+
 init_early:
+       ldx #null_handler
+       stx 1
+       lda #0x7E
+       sta 0
        rts
+
 init_hardware:
        jsr size_ram
        ; Turn on PIA  CB1 (50Hz interrupt)