Experimental PR - Island arcade (#30)

---------

Co-authored-by: Markus Kalkbrenner <git@kalki.de>

Author: PastorL69

src/dmdreader.cpp

@@ -354,6 +354,11 @@ DmdType detect_dmd() {
              (de < 9600) && (rdata > 65) && (rdata < 80)) {
     return DMD_ALVING;
 
+    // Island/SPinball(?) -> DOTCLK: 2323000 | DE: 18150 | RDATA: 565
+  } else if ((dotclk > 2200000) && (dotclk < 2450000) && (de > 17650) &&
+             (de < 18500) && (rdata > 540) && (rdata < 590)) {
+    return DMD_ISLAND;
+
     // Capcom -> DOTCLK: 4168000 | DE: 16280 | RDATA: 510
   } else if ((dotclk > 4000000) && (dotclk < 4300000) && (de > 16000) &&
              (de < 16500) && (rdata > 490) && (rdata < 530)) {
@@ -877,6 +882,26 @@ bool dmdreader_init(bool return_on_no_detection) {
       break;
     }
 
+    case DMD_ISLAND: {
+      uint input_pins[] = {RDATA};
+      dmdreader_programs_init(
+          &dmd_reader_gottlieb_program,
+          dmd_reader_gottlieb_program_get_default_config,
+          &dmd_framedetect_gottlieb_program,
+          dmd_framedetect_gottlieb_program_get_default_config, input_pins, 1,
+          0);
+
+      source_width = 128;
+      source_height = 32;
+      source_bitsperpixel = 4;
+      target_bitsperpixel = 4;
+      source_planesperframe = 4;
+      source_planehistoryperframe = 0;
+      source_lineoversampling = LINEOVERSAMPLING_NONE;
+      source_mergeplanes = MERGEPLANES_ADD;
+      break;
+    }
+
     case DMD_CAPCOM: {
       uint input_pins[] = {RDATA, RCLK};
       dmdreader_programs_init(&dmd_reader_capcom_program,