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ZXHawk: fix speedlock +3 regression

This commit is contained in:
Asnivor 2018-05-01 12:45:53 +01:00
parent b5eef04b42
commit d891938d89
2 changed files with 132 additions and 11 deletions
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139
BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/Disk/NECUPD765.FDC.cs
View File

@ -818,8 +818,125 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
// we dont need EN
UnSetBit(SR1_EN, ref Status1);
// If SK=1, the FDC skips the sector with the Deleted Data Address Mark and reads the next sector.
// The CRC bits in the deleted data field are not checked when SK=1
// invert CM for read deleted data command
if (Status2.Bit(SR2_CM))
UnSetBit(SR2_CM, ref Status2);
else
SetBit(SR2_CM, ref Status2);
// skip flag is set and no DAM found
if (CMD_FLAG_SK && Status2.Bit(SR2_CM))
{
if (ActiveCommandParams.Sector != ActiveCommandParams.EOT)
{
// increment the sector ID and search again
ActiveCommandParams.Sector++;
continue;
}
else
{
// no execution phase
SetBit(SR0_IC0, ref Status0);
UnSetBit(SR0_IC1, ref Status0);
// result requires the actual track id, rather than the sector track id
ActiveCommandParams.Cylinder = track.TrackNumber;
CommitResultCHRN();
CommitResultStatus();
ActivePhase = Phase.Result;
break;
}
}
// we can read this sector
else
{
// if DAM is not set this will be the last sector to read
if (Status2.Bit(SR2_CM))
{
ActiveCommandParams.EOT = ActiveCommandParams.Sector;
}
if (!CMD_FLAG_SK && !Status2.Bit(SR2_CM) &&
ActiveDrive.Disk.Protection == ProtectionType.PaulOwens)
{
ActiveCommandParams.EOT = ActiveCommandParams.Sector;
SetBit(SR2_CM, ref Status2);
SetBit(SR0_IC0, ref Status0);
UnSetBit(SR0_IC1, ref Status0);
terminate = true;
}
// read the sector
for (int i = 0; i < sectorSize; i++)
{
ExecBuffer[buffPos++] = sector.ActualData[i];
}
if (sector.SectorID == ActiveCommandParams.EOT)
{
// this was the last sector to read
SetBit(SR1_EN, ref Status1);
int keyIndex = 0;
for (int i = 0; i < track.Sectors.Length; i++)
{
if (track.Sectors[i].SectorID == sector.SectorID)
{
keyIndex = i;
break;
}
}
if (keyIndex == track.Sectors.Length - 1)
{
// last sector on the cylinder, set EN
SetBit(SR1_EN, ref Status1);
// increment cylinder
ActiveCommandParams.Cylinder++;
// reset sector
ActiveCommandParams.Sector = 1;
ActiveDrive.SectorIndex = 0;
}
else
{
ActiveDrive.SectorIndex++;
}
UnSetBit(SR0_IC1, ref Status0);
if (terminate)
SetBit(SR0_IC0, ref Status0);
else
UnSetBit(SR0_IC0, ref Status0);
SetBit(SR0_IC0, ref Status0);
// result requires the actual track id, rather than the sector track id
ActiveCommandParams.Cylinder = track.TrackNumber;
// remove CM (appears to be required to defeat Alkatraz copy protection)
UnSetBit(SR2_CM, ref Status2);
CommitResultCHRN();
CommitResultStatus();
ActivePhase = Phase.Execution;
break;
}
else
{
// continue with multi-sector read operation
ActiveCommandParams.Sector++;
//ActiveDrive.SectorIndex++;
}
}
/*
// If SK=1, the FDC skips the sector with the Data Address Mark and reads the next sector.
// The CRC bits in the data field are not checked when SK=1
if (CMD_FLAG_SK && !Status2.Bit(SR2_CM))
{
if (ActiveCommandParams.Sector != ActiveCommandParams.EOT)
@ -858,7 +975,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
terminate = true;
}
if (!CMD_FLAG_SK && Status2.Bit(SR2_CM))
if (!CMD_FLAG_SK && !Status2.Bit(SR2_CM))
{
// deleted address mark was detected with NO skip flag set
ActiveCommandParams.EOT = ActiveCommandParams.Sector;
@ -927,6 +1044,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
ActiveCommandParams.Sector++;
//ActiveDrive.SectorIndex++;
}
*/
}
if (ActivePhase == Phase.Execution)
@ -1479,6 +1597,11 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
ResBuffer[RS_ST0] = Status0;
// check for DAM & CRC
//if (data.Status2.Bit(SR2_CM))
//SetBit(SR2_CM, ref ResBuffer[RS_ST2]);
// increment the current sector
ActiveDrive.SectorIndex++;
@ -2698,7 +2821,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
{
// interrupt has been raised for this drive
// acknowledge
ActiveDrive.SeekStatus = SEEK_IDLE;// SEEK_INTACKNOWLEDGED;
ActiveDrive.SeekStatus = SEEK_INTACKNOWLEDGED;
// result length 2
ResLength = 2;
@ -2709,7 +2832,6 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
// second byte is the current track id
ResBuffer[1] = ActiveDrive.CurrentTrackID;
}
/*
else if (ActiveDrive.SeekStatus == SEEK_INTACKNOWLEDGED)
{
// DriveA interrupt has already been acknowledged
@ -2719,8 +2841,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
Status0 = 192;
ResBuffer[0] = Status0;
}
*/
else //if (ActiveDrive.SeekStatus == SEEK_IDLE)
else if (ActiveDrive.SeekStatus == SEEK_IDLE)
{
// SIS with no interrupt
ResLength = 1;
@ -3507,7 +3628,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
GetBit(SR1_NW, Status1) ||
GetBit(SR1_OR, Status1) ||
GetBit(SR2_BC, Status2) ||
//GetBit(SR2_CM, Status2) ||
GetBit(SR2_CM, Status2) ||
GetBit(SR2_DD, Status2) ||
GetBit(SR2_MD, Status2) ||
GetBit(SR2_SN, Status2) ||
@ -3527,7 +3648,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
else if (GetBit(SR2_CM, Status2))
{
// DAM found - unset IC and US0
//UnSetBit(SR0_IC0, ref Status0);
UnSetBit(SR0_IC0, ref Status0);
UnSetBit(SR0_US0, ref Status0);
}

4
BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Media/Disk/FloppyDisk.cs
View File

@ -203,8 +203,8 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
return false;
// secID 2 needs a CRC error
if (!(sec.Status1.Bit(5) || sec.Status2.Bit(5)))
return false;
//if (!(sec.Status1.Bit(5) || sec.Status2.Bit(5)))
//return false;
// check for filler
bool startFillerFound = true;