diff --git a/src/device/keyboard.c b/src/device/keyboard.c
index de97592bf..2b851f36c 100644
--- a/src/device/keyboard.c
+++ b/src/device/keyboard.c
@@ -85,6 +85,8 @@ typedef struct {
     const uint8_t brk[4];
 } scconvtbl;
 
+/* Is this a left-over of something planned earlier? */
+#ifdef USE_SCCONV55_82
 static scconvtbl scconv55_82[18 + 1] =
 {
     // clang-format off
@@ -109,6 +111,7 @@ static scconvtbl scconv55_82[18 + 1] =
       {.sc = 0 , .mk = { 0 }, .brk = { 0 } } /* end */
     // clang-format on
 };
+#endif
 
 static scconvtbl scconv55_8a[18 + 1] =
 {
diff --git a/src/include/86box/machine.h b/src/include/86box/machine.h
index 690d867db..78f4902eb 100644
--- a/src/include/86box/machine.h
+++ b/src/include/86box/machine.h
@@ -903,7 +903,7 @@ extern int machine_ps2_model_70_type3_init(const machine_t *);
 extern int machine_ps2_model_80_init(const machine_t *);
 extern int machine_ps2_model_80_axx_init(const machine_t *);
 extern int machine_ps2_model_70_type4_init(const machine_t *);
-extern int machine_ps55_model_50t_init(const machine_t*);;
+extern int machine_ps55_model_50t_init(const machine_t*);
 extern int machine_ps55_model_50v_init(const machine_t*);
 
 /* m_tandy.c */
diff --git a/src/video/vid_ps55da2.c b/src/video/vid_ps55da2.c
index ad27c978c..aaf5d4803 100644
--- a/src/video/vid_ps55da2.c
+++ b/src/video/vid_ps55da2.c
@@ -1256,8 +1256,8 @@ da2_out(uint16_t addr, uint16_t val, void *p)
 uint16_t
 da2_in(uint16_t addr, void *p)
 {
-    da2_t   *da2 = (da2_t *) p;
-    uint16_t temp;
+    da2_t   *da2  = (da2_t *) p;
+    uint16_t temp = 0xff;
 
     switch (addr) {
         case 0x3c3:
@@ -3020,7 +3020,7 @@ da2_reset(void *priv)
 }
 
 static void *
-da2_init()
+da2_init(UNUSED(const device_t *info))
 {
     if (svga_get_pri() == NULL)
         return NULL;
@@ -3083,7 +3083,7 @@ da2_init()
     return da2;
 }
 static int
-da2_available()
+da2_available(void)
 {
     return (rom_present(DA2_FONTROM_PATH_HANT) || rom_present(DA2_FONTROM_PATH_JPAN));
 }