Add gameport to Soundblaster Pro v1 and v2

src/sound/snd_sb.c

@@ -3042,6 +3042,12 @@ sb_pro_v1_init(UNUSED(const device_t *info))
     if (device_get_config_int("receive_input"))
         midi_in_handler(1, sb_dsp_input_msg, sb_dsp_input_sysex, &sb->dsp);
 
+    if (device_get_config_int("gameport")) {
+        sb->gameport      = gameport_add(&gameport_device);
+        sb->gameport_addr = 0x200;
+        gameport_remap(sb->gameport, sb->gameport_addr);
+    }
+
     return sb;
 }
 
@@ -3096,6 +3102,12 @@ sb_pro_v2_init(UNUSED(const device_t *info))
     if (device_get_config_int("receive_input"))
         midi_in_handler(1, sb_dsp_input_msg, sb_dsp_input_sysex, &sb->dsp);
 
+    if (device_get_config_int("gameport")) {
+        sb->gameport      = gameport_add(&gameport_device);
+        sb->gameport_addr = 0x200;
+        gameport_remap(sb->gameport, sb->gameport_addr);
+    }
+
     return sb;
 }
 
@@ -4465,6 +4477,17 @@ static const device_config_t sb_pro_config[] = {
         },
         .bios           = { { 0 } }
     },
+    {
+        .name           = "gameport",
+        .description    = "Enable Game port",
+        .type           = CONFIG_BINARY,
+        .default_string = NULL,
+        .default_int    = 0,
+        .file_filter    = NULL,
+        .spinner        = { 0 },
+        .selection      = { { 0 } },
+        .bios           = { { 0 } }
+    },
     {
         .name           = "opl",
         .description    = "Enable OPL",