First draft of nuvolink simulation

2025-12-22 21:31:06 -05:00 · 2020-09-11 17:00:11 -05:00
parent 0826f297f1
commit 0d7debcf68
7 changed files with 718 additions and 5 deletions
--- a/src/raspberrypi/devices/scsi_nuvolink.h
+++ b/src/raspberrypi/devices/scsi_nuvolink.h
@@ -0,0 +1,102 @@
+//---------------------------------------------------------------------------
+//
+//	SCSI Target Emulator RaSCSI (*^..^*)
+//	for Raspberry Pi
+//
+//  Copyright (C) 2020 akuker
+//	Copyright (C) 2014-2020 GIMONS
+//	Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
+//
+//  Licensed under the BSD 3-Clause License. 
+//  See LICENSE file in the project root folder.
+//
+//  [ Emulation of the Nuvolink SC SCSI Ethernet interface ]
+//
+//  This is based upon the fantastic documentation from Saybur on Gibhub
+//  for the scuznet device. He did most of the hard work of reverse
+//  engineering the protocol, documented here:
+//     https://github.com/saybur/scuznet/blob/master/PROTOCOL.md
+//
+//  This does NOT include the file system functionality that is present
+//  in the Sharp X68000 host bridge.
+//
+//  Note: This requires a the Nuvolink SC driver
+//---------------------------------------------------------------------------
+#pragma once
+
+#include "xm6.h"
+#include "os.h"
+#include "disk.h"
+#include "ctapdriver.h"
+
+//===========================================================================
+//
+//	SCSI Nuvolink SC
+//
+//===========================================================================
+class SCSINuvolink : public Disk
+{
+public:
+	// Basic Functions
+	SCSINuvolink();
+										// Constructor
+	virtual ~SCSINuvolink();
+										// Destructor
+
+	// commands
+	int FASTCALL Inquiry(const DWORD *cdb, BYTE *buf, DWORD major, DWORD minor);
+										// INQUIRY command
+	BOOL FASTCALL TestUnitReady(const DWORD *cdb);
+										// TEST UNIT READY command
+	int FASTCALL GetMessage10(const DWORD *cdb, BYTE *buf);
+										// GET MESSAGE10 command
+	BOOL FASTCALL SendMessage10(const DWORD *cdb, BYTE *buf);
+										// SEND MESSAGE10 command
+
+private:
+	enum nuvolink_command_enum : BYTE {
+		cmmd_tstrdy = 0x00, // Test Unit Ready
+		cmmd_ethrst = 0x02, // Reset Statistics (Vendor Specific)
+		cmmd_rqsens = 0x03, // Request Sense
+		cmmd_ethwrt = 0x05, // Send Package (Vendor Specific)
+		cmmd_addr   = 0x06, // Change MAC address (Vendor Specific)
+		cmmd_getmsg = 0x08, // Get Message
+		cmmd_mcast  = 0x09, // Set Multicast Registers
+		cmmd_sndmsg = 0x0A, // Send Message
+		cmmd_mdsens = 0x0C, // Unknown Vendor Specific Command?
+		cmmd_inq    = 0x12, // Inquiry
+		cmmd_rdiag  = 0x1C, // Receive Diagnostic Results
+		cmmd_sdiag  = 0x1D, // Send Diagnostic
+	};
+
+	static const char* m_vendor_name;
+	static const char* m_device_name;
+	static const char* m_revision;
+
+#if defined(RASCSI) && !defined(BAREMETAL)
+	int FASTCALL GetMacAddr(BYTE *buf);
+										// Get MAC address
+	void FASTCALL SetMacAddr(BYTE *buf);
+										// Set MAC address
+	void FASTCALL ReceivePacket();
+										// Receive a packet
+	void FASTCALL GetPacketBuf(BYTE *buf);
+										// Get a packet
+	void FASTCALL SendPacket(BYTE *buf, int len);
+										// Send a packet
+
+	CTapDriver *tap;
+										// TAP driver
+	BOOL m_bTapEnable;
+										// TAP valid flag
+	BYTE mac_addr[6];
+										// MAC Addres
+	int packet_len;
+										// Receive packet size
+	BYTE packet_buf[0x1000];
+										// Receive packet buffer
+	BOOL packet_enable;
+										// Received packet valid
+#endif	// RASCSI && !BAREMETAL
+
+};