z80: Fix IRQ handling for NMOS devices

diff --git a/Kernel/lowlevel-z80-nmos.s b/Kernel/lowlevel-z80-nmos.s
index 715a7a5..dae2dc5 100644 (file)
--- a/Kernel/lowlevel-z80-nmos.s
+++ b/Kernel/lowlevel-z80-nmos.s
@@ -13,6 +13,7 @@ _di:          xor a           ; NMOS Z80 bug work around as per CPU manual
                scf             ; disabled
 was_ei:                push af
                pop hl
+               di
                ret
 
 _irqrestore:   pop hl