public static ModePage_05?DecodeModePage_05(byte[] pageResponse)
{
if ((pageResponse?[0] &0x40) == 0x40)
{
return(null);
}
if ((pageResponse?[0] &0x3F) != 0x05)
{
return(null);
}
if (pageResponse[1] + 2 != pageResponse.Length)
{
return(null);
}
if (pageResponse.Length < 32)
{
return(null);
}
ModePage_05 decoded = new ModePage_05();
decoded.PS |= (pageResponse[0] & 0x80) == 0x80;
decoded.TransferRate = (ushort)((pageResponse[2] << 8) + pageResponse[3]);
decoded.Heads = pageResponse[4];
decoded.SectorsPerTrack = pageResponse[5];
decoded.BytesPerSector = (ushort)((pageResponse[6] << 8) + pageResponse[7]);
decoded.Cylinders = (ushort)((pageResponse[8] << 8) + pageResponse[9]);
decoded.WritePrecompCylinder = (ushort)((pageResponse[10] << 8) + pageResponse[11]);
decoded.WriteReduceCylinder = (ushort)((pageResponse[12] << 8) + pageResponse[13]);
decoded.DriveStepRate = (ushort)((pageResponse[14] << 8) + pageResponse[15]);
decoded.DriveStepPulse = pageResponse[16];
decoded.HeadSettleDelay = (ushort)((pageResponse[17] << 8) + pageResponse[18]);
decoded.MotorOnDelay = pageResponse[19];
decoded.MotorOffDelay = pageResponse[20];
decoded.TRDY |= (pageResponse[21] & 0x80) == 0x80;
decoded.SSN |= (pageResponse[21] & 0x40) == 0x40;
decoded.MO |= (pageResponse[21] & 0x20) == 0x20;
decoded.SPC = (byte)(pageResponse[22] & 0x0F);
decoded.WriteCompensation = pageResponse[23];
decoded.HeadLoadDelay = pageResponse[24];
decoded.HeadUnloadDelay = pageResponse[25];
decoded.Pin34 = (byte)((pageResponse[26] & 0xF0) >> 4);
decoded.Pin2 = (byte)(pageResponse[26] & 0x0F);
decoded.Pin4 = (byte)((pageResponse[27] & 0xF0) >> 4);
decoded.Pin1 = (byte)(pageResponse[27] & 0x0F);
decoded.MediumRotationRate = (ushort)((pageResponse[28] << 8) + pageResponse[29]);
return(decoded);
}
public static string PrettifyModePage_05(ModePage_05?modePage)
{
if (!modePage.HasValue)
{
return(null);
}
ModePage_05 page = modePage.Value;
StringBuilder sb = new StringBuilder();
sb.AppendLine("SCSI Flexible disk page:");
if (page.PS)
{
sb.AppendLine("\tParameters can be saved");
}
sb.AppendFormat("\tTransfer rate: {0} kbit/s", page.TransferRate).AppendLine();
sb.AppendFormat("\t{0} heads", page.Heads).AppendLine();
sb.AppendFormat("\t{0} cylinders", page.Cylinders).AppendLine();
sb.AppendFormat("\t{0} sectors per track", page.SectorsPerTrack).AppendLine();
sb.AppendFormat("\t{0} bytes per sector", page.BytesPerSector).AppendLine();
if (page.WritePrecompCylinder < page.Cylinders)
{
sb.AppendFormat("\tWrite pre-compensation starts at cylinder {0}", page.WritePrecompCylinder)
.AppendLine();
}
if (page.WriteReduceCylinder < page.Cylinders)
{
sb.AppendFormat("\tWrite current reduction starts at cylinder {0}", page.WriteReduceCylinder)
.AppendLine();
}
if (page.DriveStepRate > 0)
{
sb.AppendFormat("\tDrive steps in {0} μs", (uint)page.DriveStepRate * 100).AppendLine();
}
if (page.DriveStepPulse > 0)
{
sb.AppendFormat("\tEach step pulse is {0} ms", page.DriveStepPulse).AppendLine();
}
if (page.HeadSettleDelay > 0)
{
sb.AppendFormat("\tHeads settles in {0} μs", (uint)page.HeadSettleDelay * 100).AppendLine();
}
if (!page.TRDY)
{
sb
.AppendFormat("\tTarget shall wait {0} seconds before attempting to access the medium after motor on is asserted",
(double)page.MotorOnDelay * 10).AppendLine();
}
else
{
sb
.AppendFormat("\tTarget shall wait {0} seconds after drive is ready before aborting medium access attemps",
(double)page.MotorOnDelay * 10).AppendLine();
}
if (page.MotorOffDelay != 0xFF)
{
sb
.AppendFormat("\tTarget shall wait {0} seconds before releasing the motor on signal after becoming idle",
(double)page.MotorOffDelay * 10).AppendLine();
}
else
{
sb.AppendLine("\tTarget shall never release the motor on signal");
}
if (page.TRDY)
{
sb.AppendLine("\tThere is a drive ready signal");
}
if (page.SSN)
{
sb.AppendLine("\tSectors start at 1");
}
if (page.MO)
{
sb.AppendLine("\tThe motor on signal shall remain released");
}
sb.AppendFormat("\tDrive needs to do {0} step pulses per cylinder", page.SPC + 1).AppendLine();
if (page.WriteCompensation > 0)
{
sb.AppendFormat("\tWrite pre-compensation is {0}", page.WriteCompensation).AppendLine();
}
if (page.HeadLoadDelay > 0)
{
sb.AppendFormat("\tHead takes {0} ms to load", page.HeadLoadDelay).AppendLine();
}
if (page.HeadUnloadDelay > 0)
{
sb.AppendFormat("\tHead takes {0} ms to unload", page.HeadUnloadDelay).AppendLine();
}
if (page.MediumRotationRate > 0)
{
sb.AppendFormat("\tMedium rotates at {0} rpm", page.MediumRotationRate).AppendLine();
}
switch (page.Pin34 & 0x07)
{
case 0:
sb.AppendLine("\tPin 34 is unconnected");
break;
case 1:
sb.Append("\tPin 34 indicates drive is ready when active ");
sb.Append((page.Pin34 & 0x08) == 0x08 ? "high" : "low");
break;
case 2:
sb.Append("\tPin 34 indicates disk has changed when active ");
sb.Append((page.Pin34 & 0x08) == 0x08 ? "high" : "low");
break;
default:
sb.AppendFormat("\tPin 34 indicates unknown function {0} when active ", page.Pin34 & 0x07);
sb.Append((page.Pin34 & 0x08) == 0x08 ? "high" : "low");
break;
}
switch (page.Pin4 & 0x07)
{
case 0:
sb.AppendLine("\tPin 4 is unconnected");
break;
case 1:
sb.Append("\tPin 4 indicates drive is in use when active ");
sb.Append((page.Pin4 & 0x08) == 0x08 ? "high" : "low");
break;
case 2:
sb.Append("\tPin 4 indicates eject when active ");
sb.Append((page.Pin4 & 0x08) == 0x08 ? "high" : "low");
break;
case 3:
sb.Append("\tPin 4 indicates head load when active ");
sb.Append((page.Pin4 & 0x08) == 0x08 ? "high" : "low");
break;
default:
sb.AppendFormat("\tPin 4 indicates unknown function {0} when active ", page.Pin4 & 0x07);
sb.Append((page.Pin4 & 0x08) == 0x08 ? "high" : "low");
break;
}
switch (page.Pin2 & 0x07)
{
case 0:
sb.AppendLine("\tPin 2 is unconnected");
break;
default:
sb.AppendFormat("\tPin 2 indicates unknown function {0} when active ", page.Pin2 & 0x07);
sb.Append((page.Pin2 & 0x08) == 0x08 ? "high" : "low");
break;
}
switch (page.Pin1 & 0x07)
{
case 0:
sb.AppendLine("\tPin 1 is unconnected");
break;
case 1:
sb.Append("\tPin 1 indicates disk change reset when active ");
sb.Append((page.Pin1 & 0x08) == 0x08 ? "high" : "low");
break;
default:
sb.AppendFormat("\tPin 1 indicates unknown function {0} when active ", page.Pin1 & 0x07);
sb.Append((page.Pin1 & 0x08) == 0x08 ? "high" : "low");
break;
}
return(sb.ToString());
}