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ZXHawk: Started UPD write commands implementation

This commit is contained in:
Asnivor 2018-05-03 19:29:47 +01:00
parent 2b53f9b954
commit 20cdb02de8
1 changed files with 225 additions and 0 deletions
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225
BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Hardware/Disk/NECUPD765.FDC.cs
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@ -1681,6 +1681,81 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
// Receiving command parameter bytes
//----------------------------------------
case Phase.Command:
// store the parameter in the command buffer
CommBuffer[CommCounter] = LastByteReceived;
// process parameter byte
ParseParamByteStandard(CommCounter);
// increment command parameter counter
CommCounter++;
// was that the last parameter byte?
if (CommCounter == ActiveCommand.ParameterByteCount)
{
// all parameter bytes received - setup for execution phase
// clear exec buffer and status registers
ClearExecBuffer();
Status0 = 0;
Status1 = 0;
Status2 = 0;
Status3 = 0;
// temp sector index
byte secIdx = ActiveCommandParams.Sector;
// hack for when another drive (non-existent) is being called
if (ActiveDrive.ID != 0)
DiskDriveIndex = 0;
// do we have a valid disk inserted?
if (!ActiveDrive.FLAG_READY)
{
// no disk, no tracks or motor is not on
SetBit(SR0_IC0, ref Status0);
SetBit(SR0_NR, ref Status0);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
// check write protect tab
if (ActiveDrive.FLAG_WRITEPROTECT)
{
SetBit(SR0_IC0, ref Status0);
SetBit(SR1_NW, ref Status1);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
else
{
// not implemented yet
SetBit(SR0_IC0, ref Status0);
SetBit(SR1_NW, ref Status1);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
}
break;
//----------------------------------------
@ -1819,6 +1894,81 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
// Receiving command parameter bytes
//----------------------------------------
case Phase.Command:
// store the parameter in the command buffer
CommBuffer[CommCounter] = LastByteReceived;
// process parameter byte
ParseParamByteStandard(CommCounter);
// increment command parameter counter
CommCounter++;
// was that the last parameter byte?
if (CommCounter == ActiveCommand.ParameterByteCount)
{
// all parameter bytes received - setup for execution phase
// clear exec buffer and status registers
ClearExecBuffer();
Status0 = 0;
Status1 = 0;
Status2 = 0;
Status3 = 0;
// temp sector index
byte secIdx = ActiveCommandParams.Sector;
// hack for when another drive (non-existent) is being called
if (ActiveDrive.ID != 0)
DiskDriveIndex = 0;
// do we have a valid disk inserted?
if (!ActiveDrive.FLAG_READY)
{
// no disk, no tracks or motor is not on
SetBit(SR0_IC0, ref Status0);
SetBit(SR0_NR, ref Status0);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
// check write protect tab
if (ActiveDrive.FLAG_WRITEPROTECT)
{
SetBit(SR0_IC0, ref Status0);
SetBit(SR1_NW, ref Status1);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
else
{
// not implemented yet
SetBit(SR0_IC0, ref Status0);
SetBit(SR1_NW, ref Status1);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
}
break;
//----------------------------------------
@ -1979,6 +2129,81 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
// Receiving command parameter bytes
//----------------------------------------
case Phase.Command:
// store the parameter in the command buffer
CommBuffer[CommCounter] = LastByteReceived;
// process parameter byte
ParseParamByteStandard(CommCounter);
// increment command parameter counter
CommCounter++;
// was that the last parameter byte?
if (CommCounter == ActiveCommand.ParameterByteCount)
{
// all parameter bytes received - setup for execution phase
// clear exec buffer and status registers
ClearExecBuffer();
Status0 = 0;
Status1 = 0;
Status2 = 0;
Status3 = 0;
// temp sector index
byte secIdx = ActiveCommandParams.Sector;
// hack for when another drive (non-existent) is being called
if (ActiveDrive.ID != 0)
DiskDriveIndex = 0;
// do we have a valid disk inserted?
if (!ActiveDrive.FLAG_READY)
{
// no disk, no tracks or motor is not on
SetBit(SR0_IC0, ref Status0);
SetBit(SR0_NR, ref Status0);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
// check write protect tab
if (ActiveDrive.FLAG_WRITEPROTECT)
{
SetBit(SR0_IC0, ref Status0);
SetBit(SR1_NW, ref Status1);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
else
{
// not implemented yet
SetBit(SR0_IC0, ref Status0);
SetBit(SR1_NW, ref Status1);
CommitResultCHRN();
CommitResultStatus();
//ResBuffer[RS_ST0] = Status0;
// move to result phase
ActivePhase = Phase.Result;
break;
}
}
break;
//----------------------------------------