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Improved support for latch when drive is empty or disconnected (#864) (PR #870)

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. NB. Not hooked up any way to configure the drive as disconnected (nor fixed the GUI to disallow inserting a disk).
This commit is contained in:
TomCh 2020-12-12 20:05:29 +00:00 committed by GitHub
parent b1b441952b
commit 1e35d4448c
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2 changed files with 61 additions and 19 deletions
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71
source/Disk.cpp
View File

@ -211,21 +211,27 @@ void Disk2InterfaceCard::SaveLastDiskImage(const int drive)
//===========================================================================
// Called by ControlMotor() & Enable()
void Disk2InterfaceCard::CheckSpinning(const ULONG uExecutedCycles)
void Disk2InterfaceCard::CheckSpinning(const bool stateChanged, const ULONG uExecutedCycles)
{
DWORD modechange = (m_floppyMotorOn && !m_floppyDrive[m_currDrive].m_spinning);
bool modeChanged = m_floppyMotorOn && !m_floppyDrive[m_currDrive].m_spinning;
if (m_floppyMotorOn)
if (m_floppyMotorOn && IsDriveConnected(m_currDrive))
m_floppyDrive[m_currDrive].m_spinning = SPINNING_CYCLES;
if (modechange)
if (modeChanged)
FrameDrawDiskLEDS( (HDC)0 );
if (modechange)
if (modeChanged)
{
// Set m_diskLastCycle when motor changes: not spinning (ie. off for 1 sec) -> on
m_diskLastCycle = g_nCumulativeCycles;
}
if (m_floppyMotorOn && stateChanged)
{
// Set m_motorOnCycle when: motor changes to on, or the other drive is enabled (and motor is on)
m_floppyDrive[m_currDrive].m_motorOnCycle = g_nCumulativeCycles;
}
}
//===========================================================================
@ -403,17 +409,20 @@ void Disk2InterfaceCard::Boot(void)
void __stdcall Disk2InterfaceCard::ControlMotor(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles)
{
BOOL newState = address & 1;
bool stateChanged = (newState != m_floppyMotorOn);
if (newState != m_floppyMotorOn) // motor changed state
if (stateChanged)
{
m_floppyMotorOn = newState;
m_formatTrack.DriveNotWritingTrack();
}
m_floppyMotorOn = newState;
// NB. Motor off doesn't reset the Command Decoder like reset. (UTAIIe figures 9.7 & 9.8 chip C2)
// - so it doesn't reset this state: m_seqFunc, m_magnetStates
#if LOG_DISK_MOTOR
LOG_DISK("%08X: motor %s\r\n", (UINT32)g_nCumulativeCycles, (m_floppyMotorOn) ? "on" : "off");
#endif
CheckSpinning(uExecutedCycles);
CheckSpinning(stateChanged, uExecutedCycles);
}
//===========================================================================
@ -527,13 +536,16 @@ void Disk2InterfaceCard::Destroy(void)
void __stdcall Disk2InterfaceCard::Enable(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles)
{
m_currDrive = address & 1;
WORD newDrive = address & 1;
bool stateChanged = (newDrive != m_currDrive);
m_currDrive = newDrive;
#if LOG_DISK_ENABLE_DRIVE
LOG_DISK("%08X: enable drive: %d\r\n", (UINT32)g_nCumulativeCycles, m_currDrive);
#endif
m_floppyDrive[!m_currDrive].m_spinning = 0;
m_floppyDrive[!m_currDrive].m_writelight = 0;
CheckSpinning(uExecutedCycles);
CheckSpinning(stateChanged, uExecutedCycles);
}
//===========================================================================
@ -887,6 +899,22 @@ bool Disk2InterfaceCard::LogWriteCheckSyncFF(ULONG& uCycleDelta)
//===========================================================================
void Disk2InterfaceCard::UpdateLatchForEmptyDrive(FloppyDrive* pDrive)
{
if (!pDrive->m_isConnected)
{
m_floppyLatch = 0x80; // GH#864
return;
}
// Drive connected
if ((g_nCumulativeCycles - pDrive->m_motorOnCycle) < MOTOR_ON_UNTIL_LSS_STABLE_CYCLES)
m_floppyLatch = 0x80; // GH#864
else
m_floppyLatch = rand() & 0xFF; // GH#748
}
void __stdcall Disk2InterfaceCard::ReadWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG uExecutedCycles)
{
FloppyDrive* pDrive = &m_floppyDrive[m_currDrive];
@ -896,10 +924,7 @@ void __stdcall Disk2InterfaceCard::ReadWrite(WORD pc, WORD addr, BYTE bWrite, BY
ReadTrack(m_currDrive, uExecutedCycles);
if (!pFloppy->m_trackimagedata)
{
m_floppyLatch = rand() & 0xFF; // GH#748
return;
}
return UpdateLatchForEmptyDrive(pDrive);
// Improve precision of "authentic" drive mode - GH#125
UINT uSpinNibbleCount = 0;
@ -1098,8 +1123,7 @@ void __stdcall Disk2InterfaceCard::DataLatchReadWriteWOZ(WORD pc, WORD addr, BYT
if (!floppy.m_trackimagedata)
{
_ASSERT(0); // Can't happen for WOZ - ReadTrack() should return an empty track
m_floppyLatch = rand() & 0xFF; // GH#748
return;
return UpdateLatchForEmptyDrive(&drive);
}
// Don't change latch if drive off after 1 second drive-off delay (UTAIIe page 9-13)
@ -1922,7 +1946,8 @@ BYTE __stdcall Disk2InterfaceCard::IOWrite(WORD pc, WORD addr, BYTE bWrite, BYTE
// 4: Added: WOZ state
// Split up 'Unit' putting some state into a new 'Floppy'
// 5: Added: Sequencer Function
static const UINT kUNIT_VERSION = 5;
// 6: Added: Drive Connected & Motor On Cycle
static const UINT kUNIT_VERSION = 6;
#define SS_YAML_VALUE_CARD_DISK2 "Disk]["
@ -1941,14 +1966,16 @@ static const UINT kUNIT_VERSION = 5;
#define SS_YAML_KEY_LSS_SEQUENCER_FUNCTION "LSS Sequencer Function"
#define SS_YAML_KEY_DISK2UNIT "Unit"
#define SS_YAML_KEY_FILENAME "Filename"
#define SS_YAML_KEY_DRIVE_CONNECTED "Drive Connected"
#define SS_YAML_KEY_PHASE "Phase"
#define SS_YAML_KEY_PHASE_PRECISE "Phase (precise)"
#define SS_YAML_KEY_TRACK "Track" // deprecated at v4
#define SS_YAML_KEY_HEAD_WINDOW "Head Window"
#define SS_YAML_KEY_LAST_STEPPER_CYCLE "Last Stepper Cycle"
#define SS_YAML_KEY_MOTOR_ON_CYCLE "Motor On Cycle"
#define SS_YAML_KEY_FLOPPY "Floppy"
#define SS_YAML_KEY_FILENAME "Filename"
#define SS_YAML_KEY_BYTE "Byte"
#define SS_YAML_KEY_NIBBLES "Nibbles"
#define SS_YAML_KEY_BIT_OFFSET "Bit Offset"
@ -1990,10 +2017,12 @@ void Disk2InterfaceCard::SaveSnapshotFloppy(YamlSaveHelper& yamlSaveHelper, UINT
void Disk2InterfaceCard::SaveSnapshotDriveUnit(YamlSaveHelper& yamlSaveHelper, UINT unit)
{
YamlSaveHelper::Label label(yamlSaveHelper, "%s%d:\n", SS_YAML_KEY_DISK2UNIT, unit);
yamlSaveHelper.SaveBool(SS_YAML_KEY_DRIVE_CONNECTED, m_floppyDrive[unit].m_isConnected);
yamlSaveHelper.SaveUint(SS_YAML_KEY_PHASE, m_floppyDrive[unit].m_phase);
yamlSaveHelper.SaveFloat(SS_YAML_KEY_PHASE_PRECISE, m_floppyDrive[unit].m_phasePrecise); // v4
yamlSaveHelper.SaveHexUint4(SS_YAML_KEY_HEAD_WINDOW, m_floppyDrive[unit].m_headWindow); // v4
yamlSaveHelper.SaveHexUint64(SS_YAML_KEY_LAST_STEPPER_CYCLE, m_floppyDrive[unit].m_lastStepperCycle); // v4
yamlSaveHelper.SaveHexUint64(SS_YAML_KEY_MOTOR_ON_CYCLE, m_floppyDrive[unit].m_motorOnCycle); // v6
yamlSaveHelper.SaveUint(SS_YAML_KEY_SPINNING, m_floppyDrive[unit].m_spinning);
yamlSaveHelper.SaveUint(SS_YAML_KEY_WRITE_LIGHT, m_floppyDrive[unit].m_writelight);
@ -2125,6 +2154,12 @@ bool Disk2InterfaceCard::LoadSnapshotDriveUnitv4(YamlLoadHelper& yamlLoadHelper,
m_floppyDrive[unit].m_spinning = yamlLoadHelper.LoadUint(SS_YAML_KEY_SPINNING);
m_floppyDrive[unit].m_writelight = yamlLoadHelper.LoadUint(SS_YAML_KEY_WRITE_LIGHT);
if (version >= 6)
{
m_floppyDrive[unit].m_isConnected = yamlLoadHelper.LoadBool(SS_YAML_KEY_DRIVE_CONNECTED);
m_floppyDrive[unit].m_motorOnCycle = yamlLoadHelper.LoadUint64(SS_YAML_KEY_MOTOR_ON_CYCLE);
}
yamlLoadHelper.PopMap();
return bImageError;

9
source/Disk.h
View File

@ -98,9 +98,11 @@ public:
void clear()
{
m_isConnected = true;
m_phasePrecise = 0;
m_phase = 0;
m_lastStepperCycle = 0;
m_motorOnCycle = 0;
m_headWindow = 0;
m_spinning = 0;
m_writelight = 0;
@ -108,9 +110,11 @@ public:
}
public:
bool m_isConnected;
float m_phasePrecise; // Phase precise to half a phase (aka quarter track)
int m_phase; // Integral phase number
unsigned __int64 m_lastStepperCycle;
unsigned __int64 m_motorOnCycle;
BYTE m_headWindow;
DWORD m_spinning;
DWORD m_writelight;
@ -159,6 +163,7 @@ public:
bool UserSelectNewDiskImage(const int drive, LPCSTR pszFilename="");
void UpdateDriveState(DWORD cycles);
bool DriveSwap(void);
bool IsDriveConnected(int drive) { return m_floppyDrive[drive].m_isConnected; }
static std::string GetSnapshotCardName(void);
void SaveSnapshot(class YamlSaveHelper& yamlSaveHelper);
@ -178,7 +183,7 @@ public:
private:
void ResetSwitches(void);
void CheckSpinning(const ULONG uExecutedCycles);
void CheckSpinning(const bool stateChanged, const ULONG uExecutedCycles);
Disk_Status_e GetDriveLightStatus(const int drive);
bool IsDriveValid(const int drive);
void EjectDiskInternal(const int drive);
@ -199,6 +204,7 @@ private:
void DumpTrackWOZ(FloppyDisk floppy);
bool GetFirmware(LPCSTR lpName, BYTE* pDst);
void InitFirmware(LPBYTE pCxRomPeripheral);
void UpdateLatchForEmptyDrive(FloppyDrive* pDrive);
void SaveSnapshotFloppy(YamlSaveHelper& yamlSaveHelper, UINT unit);
void SaveSnapshotDriveUnit(YamlSaveHelper& yamlSaveHelper, UINT unit);
@ -245,6 +251,7 @@ private:
static const UINT SPINNING_CYCLES = 1000*1000; // 1M cycles = ~1.000s
static const UINT WRITELIGHT_CYCLES = 1000*1000; // 1M cycles = ~1.000s
static const UINT MOTOR_ON_UNTIL_LSS_STABLE_CYCLES = 0x2EC; // ~0x2EC-0x990 cycles (depending on card). See GH#864
// Logic State Sequencer (for WOZ):
BYTE m_shiftReg;