lowlevel-6809.s: Fix up signal dispatch routine

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

diff --git a/Kernel/lowlevel-6809.s b/Kernel/lowlevel-6809.s
index 6d338d7..2c1fbc3 100644 (file)
--- a/Kernel/lowlevel-6809.s
+++ b/Kernel/lowlevel-6809.s
@@ -159,7 +159,7 @@ dispatch_process_signal:
        SAM_KERNEL
         ldb U_DATA__U_CURSIG
         beq dosigrts
-        ; put number on the stack as the argument for the signal handler
+        ; put number in X as the argument for the signal handler
        ; so extend it to 16bit
        clra
        tfr d,x
@@ -167,7 +167,7 @@ dispatch_process_signal:
        lslb            ;       2 bytes per entry
         ; load the address of signal handler function
        ldy #U_DATA__U_SIGVEC
-       ldu b,y         ; now y = udata.u_sigvec[cursig]
+       ldu b,y         ; now u = udata.u_sigvec[cursig]
 
         ; udata.u_cursig = 0;
        clr U_DATA__U_CURSIG
@@ -179,15 +179,14 @@ dispatch_process_signal:
        clr ,y+
        clr ,y
 
-        ldu #signal_return
+        ldy #signal_return
        SAM_USER
-        pshs u      ; push return address
+        pshs y      ; push return address
 
         andcc #0xef
-       jmp ,x
+       jmp ,u
 
 signal_return:
-       puls x
         orcc #0x10
 ;
 ;      FIXME: port over the Z80 loop and check for next signal