From 1c7965ac7121ee8aad8a7d181efe9cbee68a632d Mon Sep 17 00:00:00 2001
From: Jan Vos <jjcvos@hotmail.nl>
Date: Tue, 30 Dec 2025 18:35:13 +0100
Subject: [PATCH 1/2] island

---
 src/dmdreader.cpp | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/dmdreader.cpp b/src/dmdreader.cpp
index 48f0049..832aa4c 100644
--- a/src/dmdreader.cpp
+++ b/src/dmdreader.cpp
@@ -77,6 +77,7 @@ enum DmdType {
   DMD_SEGA_HD,
   DMD_GOTTLIEB,
   DMD_ALVING,
+  DMD_ISLAND,
   // CAPCOM need to be the last entries:
   DMD_CAPCOM,
   DMD_CAPCOM_HD,
@@ -382,6 +383,11 @@ 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)) {
@@ -904,6 +910,26 @@ 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,

From acf7d7e1a81c36379099229a9634e0126efba0a1 Mon Sep 17 00:00:00 2001
From: Jan Vos <jjcvos@hotmail.nl>
Date: Fri, 2 Jan 2026 17:39:58 +0100
Subject: [PATCH 2/2] fix capcom pin numbers

---
 src/dmdreader.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dmdreader.cpp b/src/dmdreader.cpp
index 832aa4c..688e70e 100644
--- a/src/dmdreader.cpp
+++ b/src/dmdreader.cpp
@@ -936,7 +936,7 @@ bool dmdreader_init(bool return_on_no_detection) {
                               dmd_reader_capcom_program_get_default_config,
                               &dmd_framedetect_capcom_program,
                               dmd_framedetect_capcom_program_get_default_config,
-                              input_pins, 3, 0);
+                              input_pins, 2, 0);
 
       source_width = 128;
       source_height = 32;