diff --git a/src/devices/bus/isa/hdc.cpp b/src/devices/bus/isa/hdc.cpp
index 05f298db6b2..5ab75da6644 100644
--- a/src/devices/bus/isa/hdc.cpp
+++ b/src/devices/bus/isa/hdc.cpp
@@ -366,6 +366,32 @@ int xt_hdc_device::dack_r()
 	return result;
 }
 
+int xt_hdc_device::dack_rs()
+{
+	UINT8 result;
+
+	logerror("%s dack_rs(%d %d)\n", machine().describe_context(), hdcdma_read, hdcdma_size);
+
+	if (hdcdma_read == 0)
+	{
+		hdcdma_read = 512;
+		hdcdma_size -= 512;
+		hdcdma_src = hdcdma_data;
+	}
+
+	result = *(hdcdma_src++);
+
+	hdcdma_read--;
+
+	if (!no_dma())
+	{
+		m_drq_handler((hdcdma_read) ? 1 : 0);
+		if(!(hdcdma_read)) pc_hdc_result(0);
+	}
+
+	return result;
+}
+
 
 
 void xt_hdc_device::dack_w(int data)
@@ -441,7 +467,7 @@ void xt_hdc_device::execute_read()
 	if (!disk)
 		return;
 
-	status |= STA_READY;  // ready to recieve data
+	status |= STA_READY;  // ready to receive data
 	status &= ~STA_INPUT;
 	status &= ~STA_COMMAND;
 
@@ -456,6 +482,23 @@ void xt_hdc_device::execute_read()
 	}
 }
 
+void xt_hdc_device::execute_readsbuff()
+{
+	status |= STA_READY;  // ready to receive data
+	status &= ~STA_INPUT;
+	status &= ~STA_COMMAND;
+
+	hdcdma_src = hdcdma_data;
+	hdcdma_read = 512;
+	hdcdma_size = 512;
+
+	if(!no_dma())
+	{
+		m_drq_handler(1);
+		if(!hdcdma_size) pc_hdc_result(0);
+	}
+}
+
 
 
 void xt_hdc_device::execute_write()
@@ -471,7 +514,7 @@ void xt_hdc_device::execute_write()
 	if (!disk)
 		return;
 
-	status |= STA_READY;  // ready to recieve data
+	status |= STA_READY;  // ready to receive data
 	status |= STA_INPUT;
 	status &= ~STA_COMMAND;
 
@@ -493,7 +536,7 @@ void xt_hdc_device::execute_writesbuff()
 	hdcdma_write = 512;
 	hdcdma_size = 512;
 
-	status |= STA_READY;  // ready to recieve data
+	status |= STA_READY;  // ready to receive data
 	status |= STA_INPUT;
 	status &= ~STA_COMMAND;
 
@@ -606,6 +649,15 @@ void xt_hdc_device::command()
 			set_error_info = 0;
 			break;
 
+		case CMD_READSBUFF:
+			if (LOG_HDC_STATUS)
+			{
+				logerror("%s hdc read sector buffer\n", machine().describe_context());
+			}
+
+			execute_readsbuff();
+			break;
+
 		case CMD_WRITE:
 		case CMD_WRITELONG:
 			get_chsn();
@@ -644,7 +696,6 @@ void xt_hdc_device::command()
 			if(no_dma()) pc_hdc_result(set_error_info);
 			break;
 
-		case CMD_READSBUFF:
 		case CMD_RAMDIAG:
 		case CMD_INTERNDIAG:
 			if(no_dma()) pc_hdc_result(set_error_info);
@@ -826,7 +877,10 @@ UINT8 xt_hdc_device::data_r()
 		{
 			do
 			{
-				buffer[data_cnt++] = dack_r();
+				if (m_current_cmd == CMD_READSBUFF)
+					buffer[data_cnt++] = dack_rs();
+				else
+					buffer[data_cnt++] = dack_r();
 			} while (hdcdma_read);
 			data_cnt = 0;
 		}
@@ -1002,7 +1056,10 @@ WRITE8_MEMBER( isa8_hdc_device::pc_hdc_w )
 
 UINT8 isa8_hdc_device::dack_r(int line)
 {
-	return m_hdc->dack_r();
+	if (m_hdc->get_command() == CMD_READSBUFF)
+		return m_hdc->dack_rs();
+	else
+		return m_hdc->dack_r();
 }
 
 void isa8_hdc_device::dack_w(int line,UINT8 data)
diff --git a/src/devices/bus/isa/hdc.h b/src/devices/bus/isa/hdc.h
index 275028de4b9..fd1db1ad65d 100644
--- a/src/devices/bus/isa/hdc.h
+++ b/src/devices/bus/isa/hdc.h
@@ -38,6 +38,7 @@ public:
 	template<class _Object> static devcb_base &set_drq_handler(device_t &device, _Object object) { return downcast<xt_hdc_device &>(device).m_drq_handler.set_callback(object); }
 
 	int dack_r();
+	int dack_rs();
 	void dack_w(int data);
 	void dack_ws(int data);
 
@@ -62,6 +63,7 @@ protected:
 	int no_dma(void);
 	int get_lbasector();
 	void execute_read();
+	void execute_readsbuff();
 	void execute_write();
 	void execute_writesbuff();
 	void get_drive();