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Experimental PR - Island arcade #30

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Experimental PR - Island arcade #30

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1c7965a
island
PastorL69 Dec 30, 2025
acf7d7e
fix capcom pin numbers
PastorL69 Jan 2, 2026
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28 changes: 27 additions & 1 deletion src/dmdreader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down Expand Up @@ -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)) {
Expand Down Expand Up @@ -904,13 +910,33 @@ 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,
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;
Expand Down
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