Makefile.mingw corrections and made the code pass much stricter checks (now mandated by Makefile.mignw) to ensure GCC 14 readiness.

src/machine/m_at_commodore.c

@@ -84,7 +84,7 @@ cbm_io_write(uint16_t port, uint8_t val, void *p)
 }
 
 static void
-cbm_io_init()
+cbm_io_init(void)
 {
     io_sethandler(0x0230, 0x0001, NULL, NULL, NULL, cbm_io_write, NULL, NULL, NULL);
 }

src/machine/m_at_t3100e.c

@@ -169,7 +169,7 @@
 
 extern uint8_t *ram; /* Physical RAM */
 
-void at_init();
+void at_init(void);
 
 /* The T3100e motherboard can (and does) dynamically reassign RAM between
  * conventional, XMS and EMS. This translates to monkeying with the mappings.
@@ -336,7 +336,7 @@ port_to_page(uint16_t addr)
 }
 
 /* Used to dump the memory mapping table, for debugging
-void dump_mappings()
+void dump_mappings(void)
 {
         mem_mapping_t *mm = base_mapping.next;
 

src/machine/m_at_t3100e_vid.c

@@ -102,7 +102,7 @@ t3100e_display_set(uint8_t internal)
 }
 
 uint8_t
-t3100e_display_get()
+t3100e_display_get(void)
 {
     return st_display_internal;
 }

src/machine/m_ps2_mca.c

@@ -806,7 +806,7 @@ ps2_mca_write(uint16_t port, uint8_t val, void *p)
 }
 
 static void
-ps2_mca_board_common_init()
+ps2_mca_board_common_init(void)
 {
     io_sethandler(0x0091, 0x0001, ps2_mca_read, NULL, NULL, ps2_mca_write, NULL, NULL, NULL);
     io_sethandler(0x0094, 0x0001, ps2_mca_read, NULL, NULL, ps2_mca_write, NULL, NULL, NULL);

src/machine/m_xt_olivetti.c

@@ -201,7 +201,7 @@ mm58174_time_get(uint8_t *regs, struct tm *tm)
 
 /* One more second has passed, update the internal clock. */
 static void
-mm58x74_recalc()
+mm58x74_recalc(void)
 {
     /* Ping the internal clock. */
     if (++intclk.tm_sec == 60) {

src/machine/m_xt_t1000_vid.c

@@ -94,7 +94,7 @@ t1000_display_set(uint8_t internal)
 }
 
 uint8_t
-t1000_display_get()
+t1000_display_get(void)
 {
     return (uint8_t) st_display_internal;
 }

src/machine/m_xt_xi8088.c

@@ -37,7 +37,7 @@ typedef struct xi8088_t {
 static xi8088_t xi8088;
 
 uint8_t
-xi8088_turbo_get()
+xi8088_turbo_get(void)
 {
     return xi8088.turbo;
 }