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using com.clusterrr.Famicom.DumperConnection;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
namespace com.clusterrr.Famicom
{
static class FlashHelper
{
private enum FlashDeviceInterface
{
x8_only = 0x0000,
x16_only = 0x0001,
x8_and_x16_via_byte_pin = 0x0002,
x32_only = 0x0003,
x8_and_x16_via_word_pin = 0x0004,
}
public static void ResetFlash(FamicomDumperConnection dumper)
{
// Exit command set entry if any
dumper.WriteCpu(0x8001, 0x90);
dumper.WriteCpu(0x8001, 0x00);
// Reset
dumper.WriteCpu(0x8000, 0xF0);
}
public static int GetFlashSizePrintInfo(FamicomDumperConnection dumper)
{
dumper.WriteCpu(0x8AAA, 0x98); // CFI mode
var cfi = dumper.ReadCpu(0x8000, 0x200);
dumper.WriteCpu(0x8000, 0xF0); // Reset
if (cfi[0x20] != 0x51 || cfi[0x22] != 0x52 || cfi[0x24] != 0x59)
{
throw new IOException("Can't enter CFI mode. Invalid flash memory? Broken cartridge? Is it inserted?");
}
int size = 1 << cfi[0x27 * 2];
FlashDeviceInterface flashDeviceInterface = (FlashDeviceInterface)(cfi[0x28 * 2] | (cfi[0x29 * 2] << 8));
Console.WriteLine("Primary Algorithm Command Set and Control Interface ID Code: {0:X2}{1:X2}h", cfi[0x13 * 2], cfi[0x14 * 2]);
Console.WriteLine("Vcc Logic Supply Minimum Program / Erase voltage: {0}v", (cfi[0x1B * 2] >> 4) + 0.1 * (cfi[0x1B * 2] & 0x0F));
Console.WriteLine("Vcc Logic Supply Maximum Program / Erase voltage: {0}v", (cfi[0x1C * 2] >> 4) + 0.1 * (cfi[0x1C * 2] & 0x0F));
Console.WriteLine("Vpp [Programming] Supply Minimum Program / Erase voltage: {0}v", (cfi[0x1D * 2] >> 4) + 0.1 * (cfi[0x1D * 2] & 0x0F));
Console.WriteLine("Vpp [Programming] Supply Maximum Program / Erase voltage: {0}v", (cfi[0x1E * 2] >> 4) + 0.1 * (cfi[0x1E * 2] & 0x0F));
Console.WriteLine("Maximum number of bytes in multi-byte program: {0}", 1 << (cfi[0x2A * 2] | (cfi[0x2B * 2] << 8)));
Console.WriteLine("Device size: {0} MByte / {1} Mbit", size / 1024 / 1024, size / 1024 / 1024 * 8);
Console.WriteLine("Flash device interface: {0}", flashDeviceInterface.ToString().Replace("_"," "));
return size;
}
public static void LockBitsCheck(FamicomDumperConnection dumper)
{
// Lock Register Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0x40);
var lockRegister = dumper.ReadCpu(0x8000, 1)[0];
if ((lockRegister & 1) == 0)
Console.WriteLine("WARNING: Secured Silicon Sector Protection Bit is set!");
if ((lockRegister & 2) == 0)
Console.WriteLine("WARNING: Persistent Protection Mode Lock Bit is set!");
if ((lockRegister & 4) == 0)
Console.WriteLine("WARNING: Password Protection Mode Lock Bit is set!");
// PPB Lock Command Set Exit
dumper.WriteCpu(0x8000, 0x90);
dumper.WriteCpu(0x8000, 0x00);
}
public static void PPBLockBitCheck(FamicomDumperConnection dumper)
{
// PPB Lock Command Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0x50);
var ppbLockStatus = dumper.ReadCpu(0x8000, 1)[0];
if (ppbLockStatus == 0)
Console.WriteLine("WARNING: PPB Lock Bit is set!");
// PPB Lock Command Set Exit
dumper.WriteCpu(0x8000, 0x90);
dumper.WriteCpu(0x8000, 0x00);
}
public static byte PPBRead(FamicomDumperConnection dumper)
{
// PPB Command Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0xC0);
// PPB Status Read
var result = dumper.ReadCpu(0x8000, 1)[0];
// PPB Command Set Exit
dumper.WriteCpu(0x8000, 0x90);
dumper.WriteCpu(0x8000, 0x00);
return result;
}
public static void PPBSet(FamicomDumperConnection dumper)
{
// PPB Command Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0xC0);
// PPB Program
dumper.WriteCpu(0x8000, 0xA0);
dumper.WriteCpu(0x8000, 0x00);
// Check
try
{
while (true)
{
var b0 = dumper.ReadCpu(0x8000, 1)[0];
var b1 = dumper.ReadCpu(0x8000, 1)[0];
var tg = b0 ^ b1;
if ((tg & (1 << 6)) == 0) // DQ6 = not toggle
{
break;
}
else// DQ6 = toggle
{
if ((b0 & (1 << 5)) != 0) // DQ5 = 1
{
b0 = dumper.ReadCpu(0x8000, 1)[0];
b1 = dumper.ReadCpu(0x8000, 1)[0];
tg = b0 ^ b1;
if ((tg & (1 << 6)) == 0) // DQ6 = not toggle
break;
else
throw new IOException("PPB write failed (DQ5 is set)");
}
}
}
var r = dumper.ReadCpu(0x8000, 1)[0];
if ((r & 1) != 0) // DQ0 = 1
throw new IOException("PPB write failed (DQ0 is not set)");
}
finally
{
// PPB Command Set Exit
dumper.WriteCpu(0x8000, 0x90);
dumper.WriteCpu(0x8000, 0x00);
}
Console.WriteLine("OK");
}
public static void PPBErase(FamicomDumperConnection dumper)
{
PPBLockBitCheck(dumper);
Console.Write($"Erasing all PBBs... ");
// PPB Command Set Entry
dumper.WriteCpu(0x8AAA, 0xAA);
dumper.WriteCpu(0x8555, 0x55);
dumper.WriteCpu(0x8AAA, 0xC0);
// All PPB Erase
dumper.WriteCpu(0x8000, 0x80);
dumper.WriteCpu(0x8000, 0x30);
// Check
try
{
while (true)
{
var b0 = dumper.ReadCpu(0x8000, 1)[0];
var b1 = dumper.ReadCpu(0x8000, 1)[0];
var tg = b0 ^ b1;
if ((tg & (1 << 6)) == 0) // DQ6 = not toggle
{
break;
}
else// DQ6 = toggle
{
if ((b0 & (1 << 5)) != 0) // DQ5 = 1
{
b0 = dumper.ReadCpu(0x8000, 1)[0];
b1 = dumper.ReadCpu(0x8000, 1)[0];
tg = b0 ^ b1;
if ((tg & (1 << 6)) == 0) // DQ6 = not toggle
break;
else
throw new IOException("PPB erase failed (DQ5 is set)");
}
}
}
var r = dumper.ReadCpu(0x8000, 1)[0];
if ((r & 1) != 1) // DQ0 = 0
throw new IOException("PPB erase failed (DQ0 is not set)");
}
finally
{
// PPB Command Set Exit
dumper.WriteCpu(0x8000, 0x90);
dumper.WriteCpu(0x8000, 0x00);
}
Console.WriteLine("OK");
}
}
}
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