diff --git a/c64/kernal/iec/acptr.s b/c64/kernal/iec/acptr.s
index e5e818e7..d379da49 100644
--- a/c64/kernal/iec/acptr.s
+++ b/c64/kernal/iec/acptr.s
@@ -20,7 +20,7 @@ ACPTR:
 !:
 
 #if CONFIG_IEC
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jmp iec_rx_dispatch
 #else // no turbo supported
 	jmp iec_rx_byte
diff --git a/c64/kernal/iec/ciout.s b/c64/kernal/iec/ciout.s
index 4c6137bd..5e4c3e8b 100644
--- a/c64/kernal/iec/ciout.s
+++ b/c64/kernal/iec/ciout.s
@@ -33,7 +33,7 @@ ciout_store_in_buffer:
 ciout_send_byte:
 
 	clc // don't send with EOI
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jsr iec_tx_dispatch
 #else // no turbo supported
 	jsr iec_tx_byte
diff --git a/c64/kernal/iec/iec_send_file_name.s b/c64/kernal/iec/iec_send_file_name.s
index 7530f7a0..a372b8cd 100644
--- a/c64/kernal/iec/iec_send_file_name.s
+++ b/c64/kernal/iec/iec_send_file_name.s
@@ -30,7 +30,7 @@ iec_send_file_name_loop:
 !:
 	// Transmit one character
 	sta TBTCNT
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jsr iec_tx_dispatch
 #else // no turbo supported
 	jsr iec_tx_byte
diff --git a/c64/kernal/iec/load_iec.s b/c64/kernal/iec/load_iec.s
index a638f521..790e643c 100644
--- a/c64/kernal/iec/load_iec.s
+++ b/c64/kernal/iec/load_iec.s
@@ -111,7 +111,7 @@ load_iec:
 load_iec_loop:
 
 	// We are now ready to receive bytes
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jsr iec_rx_dispatch
 #else // no turbo supported
 	jsr iec_rx_byte
@@ -167,7 +167,7 @@ load_iec_loop_end:
 
 load_iec_get_addr_byte:
 
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jsr iec_rx_dispatch
 #else // no turbo supported
 	jsr iec_rx_byte
diff --git a/c64/kernal/iec/save_iec.s b/c64/kernal/iec/save_iec.s
index 19413839..71d7f02d 100644
--- a/c64/kernal/iec/save_iec.s
+++ b/c64/kernal/iec/save_iec.s
@@ -48,7 +48,7 @@ save_iec:
 	lda STAL+0
 	sta TBTCNT
 	clc
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jsr iec_tx_dispatch
 #else // no turbo supported
 	jsr iec_tx_byte
@@ -57,7 +57,7 @@ save_iec:
 	lda STAL+1
 	sta TBTCNT
 	clc
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jsr iec_tx_dispatch
 #else // no turbo supported
 	jsr iec_tx_byte
@@ -78,7 +78,7 @@ iec_save_loop:
 	// Send the byte
 	sta TBTCNT
 	clc
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 	jsr iec_tx_dispatch
 #else // no turbo supported
 	jsr iec_tx_byte
diff --git a/c64/kernal/iec_fast/dolphindos_detect.s b/c64/kernal/iec_fast/dolphindos_detect.s
index 093750bb..dbdafab7 100644
--- a/c64/kernal/iec_fast/dolphindos_detect.s
+++ b/c64/kernal/iec_fast/dolphindos_detect.s
@@ -18,13 +18,26 @@
 #if CONFIG_IEC_DOLPHINDOS
 
 
-dolphindos_detect: // XXX find out why this does not work
+dolphindos_detect:
+
+#if CONFIG_IEC_JIFFYDOS
+
+	lda IECPROTO
+	bne dolphindos_detect_fail         // skip if other protocol already detected
+
+#endif
+
+	// Make sure the port settings are correct
+
+	lda #$7F
+	sta CIA2_ICR                       // disable interrupt generation
+	lda #$00
+	sta CIA2_DDRB                      // set all port B lines as input
 
 	// According to logs collected from modified VICE emulator, original DolphinDOS ROM
 	// constantly reads $DD0D and $DD01 until handshake bit of $DD0D is set, or some kind
 	// of timeout occurs
 
-	php
 	ldx #$20
 
 dolphindos_detect_loop:
@@ -37,18 +50,19 @@ dolphindos_detect_loop:
 	dex
 	bne dolphindos_detect_loop
 
-	// Protocol not detected
+	// FALLTROUGH - protocol not detected
+
+dolphindos_detect_fail:
 
-	plp
 	rts
 
 dolphindos_detect_success:
 
-	// XXX protocol not implemented yet
+	// Protocol detected
 
-	panic #$00
+	lda #$02
+	sta IECPROTO
 
-	plp
 	rts
 
 
diff --git a/c64/kernal/iec_fast/iec_rx_byte_dolphindos.s b/c64/kernal/iec_fast/iec_rx_byte_dolphindos.s
new file mode 100644
index 00000000..97a908ab
--- /dev/null
+++ b/c64/kernal/iec_fast/iec_rx_byte_dolphindos.s
@@ -0,0 +1,15 @@
+
+//
+// DolphinDOS protocol support for IEC - byte reception
+//
+
+
+#if CONFIG_IEC_DOLPHINDOS
+
+
+iec_rx_byte_dolphindos:
+
+	panic #$00 // XXX implement this
+
+
+#endif
diff --git a/c64/kernal/iec_fast/iec_rx_dispatch.s b/c64/kernal/iec_fast/iec_rx_dispatch.s
index 465ee4b5..ba4c1ef1 100644
--- a/c64/kernal/iec_fast/iec_rx_dispatch.s
+++ b/c64/kernal/iec_fast/iec_rx_dispatch.s
@@ -4,7 +4,7 @@
 //
 
 
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 
 
 iec_rx_dispatch:
@@ -16,6 +16,11 @@ iec_rx_dispatch:
 	beq_far iec_rx_byte_jiffydos
 #endif // CONFIG_IEC_JIFFYDOS
 
+#if CONFIG_IEC_DOLPHINDOS
+	cmp #$02
+	beq_far iec_rx_byte_dolphindos
+#endif // CONFIG_IEC_DOLPHINDOS
+
 	jmp iec_rx_byte
 
 
diff --git a/c64/kernal/iec_fast/iec_tx_byte_dolphindos.s b/c64/kernal/iec_fast/iec_tx_byte_dolphindos.s
new file mode 100644
index 00000000..1f2cbbe9
--- /dev/null
+++ b/c64/kernal/iec_fast/iec_tx_byte_dolphindos.s
@@ -0,0 +1,15 @@
+
+//
+// DolphinDOS protocol support for IEC - byte transfer
+//
+
+
+#if CONFIG_IEC_DOLPHINDOS
+
+
+iec_tx_byte_dolphindos:
+
+	panic #$00 // XXX implement this
+
+
+#endif
diff --git a/c64/kernal/iec_fast/iec_tx_dispatch.s b/c64/kernal/iec_fast/iec_tx_dispatch.s
index 88898664..e7310024 100644
--- a/c64/kernal/iec_fast/iec_tx_dispatch.s
+++ b/c64/kernal/iec_fast/iec_tx_dispatch.s
@@ -4,7 +4,7 @@
 //
 
 
-#if CONFIG_IEC_JIFFYDOS
+#if CONFIG_IEC_JIFFYDOS || CONFIG_IEC_DOLPHINDOS
 
 
 iec_tx_dispatch:
@@ -17,6 +17,11 @@ iec_tx_dispatch:
 	beq iec_tx_dispatch_jiffydos
 #endif // CONFIG_IEC_JIFFYDOS
 
+#if CONFIG_IEC_DOLPHINDOS
+	cmp #$02
+	beq iec_tx_dispatch_dolphindos
+#endif // CONFIG_IEC_DOLPHINDOS
+
 	// FALLTROUGH
 
 iec_tx_dispatch_normal:
@@ -30,5 +35,11 @@ iec_tx_dispatch_jiffydos:
 	jmp iec_tx_byte_jiffydos
 #endif // CONFIG_IEC_JIFFYDOS
 
+#if CONFIG_IEC_DOLPHINDOS
+iec_tx_dispatch_dolphindos:
+	plp
+	jmp iec_tx_byte_dolphindos
+#endif // CONFIG_IEC_DOLPHINDOS
+
 
 #endif // any turbo supported