zx128: tidy up traps

diff --git a/Kernel/platform-zx128/zx128.s b/Kernel/platform-zx128/zx128.s
index 8403058..d7297c4 100644 (file)
--- a/Kernel/platform-zx128/zx128.s
+++ b/Kernel/platform-zx128/zx128.s
@@ -65,15 +65,25 @@
             .area _COMMONMEM
 
 _trap_monitor:
+       ;
+       ;       Not so much a monitor as wait for space
+       ;
+       ld a, #0x7F
+       in a, (0xFE)
+       rra
+       jr c, _trap_monitor
+
+_trap_reboot:
        di
-       halt
+       im 1
+       ld bc, #0x7ffd
+       xor a           ; 128K ROM, initial banks, low screen
+       out (c), a
+        rst 0          ; Into the ROM
 
 platform_interrupt_all:
         ret
 
-_trap_reboot:
-        rst 0
-
 ; -----------------------------------------------------------------------------
 ; KERNEL MEMORY BANK (above 0xC000, only accessible when the kernel is mapped)
 ; -----------------------------------------------------------------------------
@@ -239,10 +249,11 @@ map_restore:
        pop af
        ret
 
-
-; outchar: TODO: add something here (char in A). Current port #15 is emulator stub
+;
+;      We have no easy serial debug output instead just breakpoint this
+;      address when debugging.
+;
 outchar:
-        out (#0x15), A
         ret
 _kernel_flag:
         .db 1