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WOZ: removed floppyWriteMode/FloppyLoadMode - use Sequencer Function instead

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This commit is contained in:
tomcw 2019-10-05 09:53:02 +01:00
parent d5236d5ee4
commit 25496d3a52
2 changed files with 51 additions and 38 deletions
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69
source/Disk.cpp
View File

@ -127,7 +127,7 @@ LPCTSTR Disk2InterfaceCard::GetCurrentState(void)
else
return "Off";
}
else if (m_floppyWriteMode)
else if (m_seqFunc.writeMode)
{
if (m_floppyDrive[m_currDrive].m_disk.m_bWriteProtected)
return "Writing (write protected)";
@ -136,7 +136,7 @@ LPCTSTR Disk2InterfaceCard::GetCurrentState(void)
}
else
{
/*if (m_floppyLoadMode)
/*if (m_seqFunc.loadMode)
{
if (m_floppyDrive[m_currDrive].disk.bWriteProtected)
return "Reading write protect state (write protected)";
@ -409,7 +409,7 @@ void __stdcall Disk2InterfaceCard::ControlMotor(WORD, WORD address, BYTE, BYTE,
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_floppyLoadMode, m_floppyWriteMode, m_magnetStates
// - so it doesn't reset this state: m_seqFunc, m_magnetStates
#if LOG_DISK_MOTOR
CpuCalcCycles(uExecutedCycles);
LOG_DISK("%08X: motor %s\r\n", (UINT32)g_nCumulativeCycles, (m_floppyMotorOn) ? "on" : "off");
@ -856,7 +856,6 @@ bool Disk2InterfaceCard::LogWriteCheckSyncFF(ULONG& uCycleDelta)
void __stdcall Disk2InterfaceCard::ReadWrite(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG uExecutedCycles)
{
/* m_floppyLoadMode = 0; */
FloppyDrive* pDrive = &m_floppyDrive[m_currDrive];
FloppyDisk* pFloppy = &pDrive->m_disk;
@ -895,7 +894,7 @@ void __stdcall Disk2InterfaceCard::ReadWrite(WORD pc, WORD addr, BYTE bWrite, BY
}
}
if (!m_floppyWriteMode)
if (!m_seqFunc.writeMode)
{
// Don't change latch if drive off after 1 second drive-off delay (UTAIIe page 9-13)
// "DRIVES OFF forces the data register to hold its present state." (UTAIIe page 9-12)
@ -932,7 +931,7 @@ void __stdcall Disk2InterfaceCard::ReadWrite(WORD pc, WORD addr, BYTE bWrite, BY
m_formatTrack.DecodeLatchNibbleRead(m_floppyLatch);
#endif
}
else if (!pFloppy->m_bWriteProtected) // && m_floppyWriteMode
else if (!pFloppy->m_bWriteProtected) // && m_seqFunc.writeMode
{
if (!pDrive->m_spinning)
return; // If not spinning then only 1 bit-cell gets written?
@ -1039,7 +1038,6 @@ void Disk2InterfaceCard::UpdateBitStreamOffsets(FloppyDisk& floppy)
void __stdcall Disk2InterfaceCard::DataLatchReadWriteWOZ(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG uExecutedCycles)
{
/* m_floppyLoadMode = 0; */
FloppyDrive& drive = m_floppyDrive[m_currDrive];
FloppyDisk& floppy = drive.m_disk;
@ -1088,9 +1086,16 @@ void __stdcall Disk2InterfaceCard::DataLatchReadWriteWOZ(WORD pc, WORD addr, BYT
m_diskLastCycle = g_nCumulativeCycles;
if (!bWrite)
{
if (m_seqFunc.function != readSequencing)
return;
DataLatchReadWOZ(pc, addr, bitCellRemainder);
}
else
{
DataLatchWriteWOZ(pc, addr, d, bitCellRemainder);
}
// Show track status (GH#201) - NB. Prevent flooding of forcing UI to redraw!!!
if ((floppy.m_byte & 0xFF) == 0)
@ -1149,9 +1154,6 @@ void Disk2InterfaceCard::DataLatchReadWOZ(WORD pc, WORD addr, UINT bitCellRemain
continue;
}
if (m_seqFunc != readSequencing)
continue;
//
m_shiftReg <<= 1;
@ -1220,7 +1222,7 @@ void Disk2InterfaceCard::DataLatchReadWOZ(WORD pc, WORD addr, UINT bitCellRemain
void Disk2InterfaceCard::DataLatchWriteWOZ(WORD pc, WORD addr, BYTE d, UINT bitCellRemainder)
{
_ASSERT(m_floppyWriteMode);
_ASSERT(m_seqFunc.writeMode);
FloppyDrive& drive = m_floppyDrive[m_currDrive];
FloppyDisk& floppy = drive.m_disk;
@ -1395,10 +1397,8 @@ void Disk2InterfaceCard::ResetSwitches(void)
{
m_currDrive = 0;
m_floppyMotorOn = 0;
m_floppyLoadMode = 0;
m_floppyWriteMode = 0;
m_magnetStates = 0;
m_seqFunc = readSequencing;
m_seqFunc.function = readSequencing;
}
//===========================================================================
@ -1455,7 +1455,7 @@ bool Disk2InterfaceCard::UserSelectNewDiskImage(const int drive, LPCSTR pszFilen
void __stdcall Disk2InterfaceCard::LoadWriteProtect(WORD, WORD, BYTE write, BYTE value, ULONG uExecutedCycles)
{
/* m_floppyLoadMode = 1; */
_ASSERT(m_seqFunc.function == checkWriteProtAndInitWrite);
// Don't change latch if drive off after 1 second drive-off delay (UTAIIe page 9-13)
// "DRIVES OFF forces the data register to hold its present state." (UTAIIe page 9-12)
@ -1469,7 +1469,7 @@ void __stdcall Disk2InterfaceCard::LoadWriteProtect(WORD, WORD, BYTE write, BYTE
// "If for some reason the above write protect check were entered with the READ/WRITE switch in WRITE,
// the write protect switch would still be read correctly" (UTAIIe page 9-21)
// . Sequencer "SR" (Shift Right) command only loads QA (bit7) of data register (UTAIIe page 9-21)
// . A read or write will read write protect in QA.
// . A read or write will shift 'write protect' in QA.
if (m_floppyDrive[m_currDrive].m_disk.m_bWriteProtected)
m_floppyLatch |= 0x80;
else
@ -1491,8 +1491,6 @@ void __stdcall Disk2InterfaceCard::LoadWriteProtect(WORD, WORD, BYTE write, BYTE
void __stdcall Disk2InterfaceCard::SetReadMode(WORD, WORD, BYTE, BYTE, ULONG uExecutedCycles)
{
m_floppyWriteMode = 0;
m_formatTrack.DriveSwitchedToReadMode(&m_floppyDrive[m_currDrive].m_disk);
#if LOG_DISK_RW_MODE
@ -1505,8 +1503,6 @@ void __stdcall Disk2InterfaceCard::SetReadMode(WORD, WORD, BYTE, BYTE, ULONG uEx
void __stdcall Disk2InterfaceCard::SetWriteMode(WORD, WORD, BYTE, BYTE, ULONG uExecutedCycles)
{
m_floppyWriteMode = 1;
m_formatTrack.DriveSwitchedToWriteMode(m_floppyDrive[m_currDrive].m_disk.m_byte);
BOOL modechange = !m_floppyDrive[m_currDrive].m_writelight;
@ -1541,7 +1537,7 @@ void Disk2InterfaceCard::UpdateDriveState(DWORD cycles)
}
}
if (m_floppyWriteMode && (m_currDrive == loop) && pDrive->m_spinning)
if (m_seqFunc.writeMode && (m_currDrive == loop) && pDrive->m_spinning)
{
pDrive->m_writelight = WRITELIGHT_CYCLES;
}
@ -1655,17 +1651,13 @@ void Disk2InterfaceCard::SetSequencerFunction(WORD addr)
if ((addr & 0xf) < 0xc)
return;
UINT A3A2 = m_seqFunc;
switch (addr & 3)
{
case 0: A3A2 &= ~(1<<0); break; // $C08E,X (sequence addr A3 input)
case 1: A3A2 |= (1<<0); break; // $C08F,X (sequence addr A3 input)
case 2: A3A2 &= ~(1<<1); break; // $C08C,X (sequence addr A2 input)
case 3: A3A2 |= (1<<1); break; // $C08D,X (sequence addr A2 input)
case 0: m_seqFunc.writeMode = 0; break; // $C08E,X (sequence addr A2 input)
case 1: m_seqFunc.writeMode = 1; break; // $C08F,X (sequence addr A2 input)
case 2: m_seqFunc.loadMode = 0; break; // $C08C,X (sequence addr A3 input)
case 3: m_seqFunc.loadMode = 1; break; // $C08D,X (sequence addr A3 input)
}
m_seqFunc = (SEQFUNC) A3A2;
}
BYTE __stdcall Disk2InterfaceCard::IORead(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nExecutedCycles)
@ -1741,7 +1733,8 @@ BYTE __stdcall Disk2InterfaceCard::IOWrite(WORD pc, WORD addr, BYTE bWrite, BYTE
}
// any address writes the latch via sequencer LD command (74LS323 datasheet)
if (pCard->m_floppyWriteMode /* && m_floppyLoadMode */)
// if (pCard->m_seqFunc.writeMode /* && m_seqFunc.loadMode */)
if (pCard->m_seqFunc.function == dataLoadWrite)
{
pCard->m_floppyLatch = d;
@ -1759,7 +1752,8 @@ BYTE __stdcall Disk2InterfaceCard::IOWrite(WORD pc, WORD addr, BYTE bWrite, BYTE
// 3: Added: DiskLastReadLatchCycle
// 4: Added: WOZ state
// Split up 'Unit' putting some state into a new 'Floppy'
static const UINT kUNIT_VERSION = 4;
// 5: Added: Sequencer Function
static const UINT kUNIT_VERSION = 5;
#define SS_YAML_VALUE_CARD_DISK2 "Disk]["
@ -1769,12 +1763,13 @@ static const UINT kUNIT_VERSION = 4;
#define SS_YAML_KEY_ENHANCE_DISK "Enhance Disk"
#define SS_YAML_KEY_FLOPPY_LATCH "Floppy Latch"
#define SS_YAML_KEY_FLOPPY_MOTOR_ON "Floppy Motor On"
#define SS_YAML_KEY_FLOPPY_WRITE_MODE "Floppy Write Mode"
#define SS_YAML_KEY_FLOPPY_WRITE_MODE "Floppy Write Mode" // deprecated at v5
#define SS_YAML_KEY_LAST_CYCLE "Last Cycle"
#define SS_YAML_KEY_LAST_READ_LATCH_CYCLE "Last Read Latch Cycle"
#define SS_YAML_KEY_LSS_SHIFT_REG "LSS Shift Reg"
#define SS_YAML_KEY_LSS_LATCH_DELAY "LSS Latch Delay"
#define SS_YAML_KEY_LSS_RESET_SEQUENCER "LSS Reset Sequencer"
#define SS_YAML_KEY_LSS_SEQUENCER_FUNCTION "LSS Sequencer Function"
#define SS_YAML_KEY_DISK2UNIT "Unit"
#define SS_YAML_KEY_FILENAME "Filename"
@ -1847,12 +1842,12 @@ void Disk2InterfaceCard::SaveSnapshot(class YamlSaveHelper& yamlSaveHelper)
yamlSaveHelper.SaveBool(SS_YAML_KEY_ENHANCE_DISK, m_enhanceDisk);
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_FLOPPY_LATCH, m_floppyLatch);
yamlSaveHelper.SaveBool(SS_YAML_KEY_FLOPPY_MOTOR_ON, m_floppyMotorOn == TRUE);
yamlSaveHelper.SaveBool(SS_YAML_KEY_FLOPPY_WRITE_MODE, m_floppyWriteMode == TRUE);
yamlSaveHelper.SaveHexUint64(SS_YAML_KEY_LAST_CYCLE, m_diskLastCycle); // v2
yamlSaveHelper.SaveHexUint64(SS_YAML_KEY_LAST_READ_LATCH_CYCLE, m_diskLastReadLatchCycle); // v3
yamlSaveHelper.SaveHexUint8(SS_YAML_KEY_LSS_SHIFT_REG, m_shiftReg); // v4
yamlSaveHelper.SaveInt(SS_YAML_KEY_LSS_LATCH_DELAY, m_latchDelay); // v4
yamlSaveHelper.SaveBool(SS_YAML_KEY_LSS_RESET_SEQUENCER, m_resetSequencer); // v4
yamlSaveHelper.SaveInt(SS_YAML_KEY_LSS_SEQUENCER_FUNCTION, m_seqFunc.function); // v5
m_formatTrack.SaveSnapshot(yamlSaveHelper); // v2
SaveSnapshotDriveUnit(yamlSaveHelper, DRIVE_1);
@ -2010,7 +2005,8 @@ bool Disk2InterfaceCard::LoadSnapshot(class YamlLoadHelper& yamlLoadHelper, UINT
m_enhanceDisk = yamlLoadHelper.LoadBool(SS_YAML_KEY_ENHANCE_DISK);
m_floppyLatch = yamlLoadHelper.LoadUint(SS_YAML_KEY_FLOPPY_LATCH);
m_floppyMotorOn = yamlLoadHelper.LoadBool(SS_YAML_KEY_FLOPPY_MOTOR_ON);
m_floppyWriteMode = yamlLoadHelper.LoadBool(SS_YAML_KEY_FLOPPY_WRITE_MODE);
m_seqFunc.writeMode = yamlLoadHelper.LoadBool(SS_YAML_KEY_FLOPPY_WRITE_MODE) ? 1 : 0;
m_seqFunc.loadMode = 0; // Wasn't saved until v5 - overwritten later if v5
if (version >= 2)
{
@ -2030,6 +2026,11 @@ bool Disk2InterfaceCard::LoadSnapshot(class YamlLoadHelper& yamlLoadHelper, UINT
m_resetSequencer = yamlLoadHelper.LoadBool(SS_YAML_KEY_LSS_RESET_SEQUENCER);
}
if (version >= 5)
{
m_seqFunc.function = (SEQFUNC) yamlLoadHelper.LoadInt(SS_YAML_KEY_LSS_SEQUENCER_FUNCTION);
}
// Eject all disks first in case Drive-2 contains disk to be inserted into Drive-1
for (UINT i=0; i<NUM_DRIVES; i++)
{

20
source/Disk.h
View File

@ -220,8 +220,6 @@ private:
FloppyDrive m_floppyDrive[NUM_DRIVES];
BYTE m_floppyLatch;
BOOL m_floppyMotorOn;
BOOL m_floppyLoadMode; // for efficiency this is not used; it's extremely unlikely to affect emulation (nickw)
BOOL m_floppyWriteMode;
// Although the magnets are a property of the drive, their state is a property of the controller card,
// since the magnets will only be on for whichever of the 2 drives is currently selected.
@ -241,8 +239,22 @@ private:
BYTE m_shiftReg;
int m_latchDelay;
bool m_resetSequencer;
enum SEQFUNC {readSequencing, checkWriteProtAndInitWrite, dataShiftWrite, dataLoadWrite}; // UTAIIe 9-14
SEQFUNC m_seqFunc;
enum SEQFUNC {readSequencing=0, checkWriteProtAndInitWrite, dataShiftWrite, dataLoadWrite}; // UTAIIe 9-14
struct SEQUENCER_FUNCTION
{
union
{
struct
{
UINT writeMode : 1; // $C08E/F,X
UINT loadMode : 1; // $C08C/D,X
};
SEQFUNC function;
};
};
SEQUENCER_FUNCTION m_seqFunc;
UINT m_dbgLatchDelayedCnt;
// Debug: