next-cube.c: move LED logic to new next_scr2_led_update() function

Ensure that the LED status is updated by calling next_scr2_led_update() whenever
the SC2 register is written.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Thomas Huth <huth@tuxfamily.org>
Message-ID: <20231220131641.592826-10-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>

hw/m68k/next-cube.c

@@ -124,6 +124,18 @@ static const uint8_t rtc_ram2[32] = {
 #define SCR2_RTDATA 0x4
 #define SCR2_TOBCD(x) (((x / 10) << 4) + (x % 10))
 
+static void next_scr2_led_update(NeXTPC *s)
+{
+    if (s->scr2 & 0x1) {
+        DPRINTF("fault!\n");
+        s->led++;
+        if (s->led == 10) {
+            DPRINTF("LED flashing, possible fault!\n");
+            s->led = 0;
+        }
+    }
+}
+
 static void nextscr2_write(NeXTPC *s, uint32_t val, int size)
 {
     uint8_t old_scr2, scr2_2;
@@ -135,15 +147,6 @@ static void nextscr2_write(NeXTPC *s, uint32_t val, int size)
         scr2_2 = val & 0xFF;
     }
 
-    if (val & 0x1) {
-        DPRINTF("fault!\n");
-        s->led++;
-        if (s->led == 10) {
-            DPRINTF("LED flashing, possible fault!\n");
-            s->led = 0;
-        }
-    }
-
     old_scr2 = (s->old_scr2 >> 8) & 0xff;
 
     if (scr2_2 & 0x1) {
@@ -321,6 +324,7 @@ static void next_mmio_write(void *opaque, hwaddr addr, uint64_t val,
     case 0xd000 ... 0xd003:
         s->scr2 = deposit32(s->scr2, (4 - (addr - 0xd000) - size) << 3,
                             size << 3, val);
+        next_scr2_led_update(s);
         nextscr2_write(s, val, size);
         s->old_scr2 = s->scr2;
         break;