mirror of
https://github.com/AppleWin/AppleWin.git
synced 2025-01-21 10:32:12 +00:00
Merge pull request #238 from AppleWin/memory_refactor
Mainly a tidy-up to remove old, unused code from memory.cpp. Also: * Disk][ now returning floating bus for I/O register reads (still a few todo's to check). * Fixed #232 (mouse VBl IRQs were still occurring after card removed!)
This commit is contained in:
TomCh
commit
c04e934a27
@ -415,16 +415,16 @@ void DiskBoot(void)
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//===========================================================================
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static BYTE __stdcall DiskControlMotor(WORD, WORD address, BYTE, BYTE, ULONG)
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static BYTE __stdcall DiskControlMotor(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles)
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{
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floppymotoron = address & 1;
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CheckSpinning();
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return MemReturnRandomData(1);
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return MemReadFloatingBus(1, uExecutedCycles); // TC-TODO: Check b7 always set
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}
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//===========================================================================
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static BYTE __stdcall DiskControlStepper(WORD, WORD address, BYTE, BYTE, ULONG)
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static BYTE __stdcall DiskControlStepper(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles)
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{
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Disk_t * fptr = &g_aFloppyDisk[currdrive];
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#if 1
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@ -501,7 +501,8 @@ static BYTE __stdcall DiskControlStepper(WORD, WORD address, BYTE, BYTE, ULONG)
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}
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}
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#endif
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return (address == 0xE0) ? 0xFF : MemReturnRandomData(1);
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return ((address & 0xF) == 0) ? 0xFF // TC-TODO: Check why $C0E0 only returns 0xFF
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: MemReadFloatingBus(1, uExecutedCycles); // TC-TODO: Check b7 always set
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}
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//===========================================================================
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@ -519,13 +520,13 @@ void DiskDestroy(void)
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//===========================================================================
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static BYTE __stdcall DiskEnable(WORD, WORD address, BYTE, BYTE, ULONG)
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static BYTE __stdcall DiskEnable(WORD, WORD address, BYTE, BYTE, ULONG uExecutedCycles)
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{
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currdrive = address & 1;
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g_aFloppyDisk[!currdrive].spinning = 0;
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g_aFloppyDisk[!currdrive].writelight = 0;
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CheckSpinning();
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return 0;
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return MemReadFloatingBus(uExecutedCycles);
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}
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//===========================================================================
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@ -908,7 +909,8 @@ void DiskSelect(const int iDrive)
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//===========================================================================
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static BYTE __stdcall DiskSetLatchValue(WORD, WORD, BYTE write, BYTE value, ULONG) {
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static BYTE __stdcall DiskSetLatchValue(WORD, WORD, BYTE write, BYTE value, ULONG)
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{
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if (write)
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floppylatch = value;
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return floppylatch;
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@ -916,15 +918,15 @@ static BYTE __stdcall DiskSetLatchValue(WORD, WORD, BYTE write, BYTE value, ULON
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//===========================================================================
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static BYTE __stdcall DiskSetReadMode(WORD, WORD, BYTE, BYTE, ULONG)
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static BYTE __stdcall DiskSetReadMode(WORD, WORD, BYTE, BYTE, ULONG uExecutedCycles)
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{
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floppywritemode = 0;
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return MemReturnRandomData(g_aFloppyDisk[currdrive].bWriteProtected);
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return MemReadFloatingBus(g_aFloppyDisk[currdrive].bWriteProtected, uExecutedCycles);
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}
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//===========================================================================
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static BYTE __stdcall DiskSetWriteMode(WORD, WORD, BYTE, BYTE, ULONG)
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static BYTE __stdcall DiskSetWriteMode(WORD, WORD, BYTE, BYTE, ULONG uExecutedCycles)
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{
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floppywritemode = 1;
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BOOL modechange = !g_aFloppyDisk[currdrive].writelight;
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@ -934,7 +936,8 @@ static BYTE __stdcall DiskSetWriteMode(WORD, WORD, BYTE, BYTE, ULONG)
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//FrameRefreshStatus(DRAW_LEDS);
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FrameDrawDiskLEDS( (HDC)0 );
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}
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return MemReturnRandomData(1);
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return MemReadFloatingBus(1, uExecutedCycles); // TC-TODO: Check b7 always set
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}
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//===========================================================================
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@ -162,7 +162,6 @@ SOFT SWITCH STATUS FLAGS
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// . memshadow[1] = &memaux[0x0100]
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//
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//static DWORD imagemode;
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static LPBYTE memshadow[0x100];
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LPBYTE memwrite[0x100];
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@ -170,9 +169,6 @@ iofunction IORead[256];
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iofunction IOWrite[256];
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static LPVOID SlotParameters[NUM_SLOTS];
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//static BOOL fastpaging = 0; // Redundant: only ever set to 0, by MemSetFastPaging(0)
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//static DWORD image = 0;
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//static DWORD lastimage = 0;
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static BOOL lastwriteram = 0;
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LPBYTE mem = NULL;
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@ -202,7 +198,7 @@ static LPBYTE RWpages[128]; // pointers to RW memory banks
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#endif
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BYTE __stdcall IO_Annunciator(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCycles);
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void UpdatePaging(BOOL initialize, BOOL updatewriteonly);
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void UpdatePaging(BOOL initialize);
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//=============================================================================
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@ -818,66 +814,25 @@ static void SetMemMode(const DWORD uNewMemMode)
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//===========================================================================
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void ResetPaging (BOOL initialize)
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static void ResetPaging(BOOL initialize)
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{
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//if (!initialize)
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// MemSetFastPaging(0);
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lastwriteram = 0;
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SetMemMode(MF_BANK2 | MF_SLOTCXROM | MF_WRITERAM);
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UpdatePaging(initialize, 0);
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UpdatePaging(initialize);
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}
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//===========================================================================
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//void UpdateFastPaging () {
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// BOOL found = 0;
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// DWORD imagenum = 0;
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// do
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// if ((imagemode[imagenum] == memmode) ||
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// ((lastimage >= 3) &&
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// ((imagemode[imagenum] & MF_IMAGEMASK) == (memmode & MF_IMAGEMASK))))
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// found = 1;
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// else
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// ++imagenum;
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// while ((imagenum <= lastimage) && !found);
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// if (found) {
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// image = imagenum;
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// mem = memimage+(image << 16);
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// if (imagemode[image] != memmode) {
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// imagemode[image] = memmode;
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// UpdatePaging(0,1);
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// }
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// }
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// else {
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// if (lastimage < MAXIMAGES-1) {
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// imagenum = ++lastimage;
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// if (lastimage >= 3)
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// VirtualAlloc(memimage+lastimage*0x10000,0x10000,MEM_COMMIT,PAGE_READWRITE);
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// }
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// else {
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// static DWORD nextimage = 0;
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// if (nextimage > lastimage)
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// nextimage = 0;
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// imagenum = nextimage++;
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// }
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// imagemode[image = imagenum] = memmode;
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// mem = memimage+(image << 16);
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// UpdatePaging(1,0);
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// }
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//}
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//===========================================================================
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void MemUpdatePaging(BOOL initialize)
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{
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UpdatePaging(initialize, 0);
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UpdatePaging(initialize);
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}
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static void UpdatePaging (BOOL initialize, BOOL updatewriteonly /*Always zero*/)
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static void UpdatePaging(BOOL initialize)
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{
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// SAVE THE CURRENT PAGING SHADOW TABLE
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LPBYTE oldshadow[256];
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if (!(initialize /*|| updatewriteonly*/ /*|| fastpaging*/ ))
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if (!initialize)
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CopyMemory(oldshadow,memshadow,256*sizeof(LPBYTE));
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// UPDATE THE PAGING TABLES BASED ON THE NEW PAGING SWITCH VALUES
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@ -891,11 +846,8 @@ static void UpdatePaging (BOOL initialize, BOOL updatewriteonly /*Always zero*/)
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memwrite[loop] = NULL;
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}
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//if (!updatewriteonly)
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{
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for (loop = 0x00; loop < 0x02; loop++)
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memshadow[loop] = SW_ALTZP ? memaux+(loop << 8) : memmain+(loop << 8);
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}
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for (loop = 0x02; loop < 0xC0; loop++)
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{
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@ -908,8 +860,6 @@ static void UpdatePaging (BOOL initialize, BOOL updatewriteonly /*Always zero*/)
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: memmain+(loop << 8);
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}
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//if (!updatewriteonly)
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{
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for (loop = 0xC0; loop < 0xC8; loop++)
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{
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const UINT uSlotOffset = (loop & 0x0f) * 0x100;
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@ -926,7 +876,6 @@ static void UpdatePaging (BOOL initialize, BOOL updatewriteonly /*Always zero*/)
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const UINT uRomOffset = (loop & 0x0f) * 0x100;
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memshadow[loop] = pCxRomInternal+uRomOffset; // C800..CFFF - Internal ROM
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}
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}
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for (loop = 0xD0; loop < 0xE0; loop++)
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{
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@ -981,13 +930,11 @@ static void UpdatePaging (BOOL initialize, BOOL updatewriteonly /*Always zero*/)
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// . Page0 (ZP) : memdirty[0] is set when the 6502 CPU does a ZP-write, but perhaps older versions didn't set this flag (eg. the asm version?).
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// . Page1 (stack) : memdirty[1] is NOT set when the 6502 CPU writes to this page with JSR, etc.
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//if (!updatewriteonly)
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{
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for (loop = 0x00; loop < 0x100; loop++)
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{
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if (initialize || (oldshadow[loop] != memshadow[loop]))
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{
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if ((!(initialize/* || fastpaging*/)) &&
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if (!initialize &&
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((*(memdirty+loop) & 1) || (loop <= 1)))
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{
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*(memdirty+loop) &= ~1;
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@ -997,8 +944,6 @@ static void UpdatePaging (BOOL initialize, BOOL updatewriteonly /*Always zero*/)
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CopyMemory(mem+(loop << 8),memshadow[loop],256);
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}
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}
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}
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}
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//
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@ -1008,7 +953,7 @@ static void UpdatePaging (BOOL initialize, BOOL updatewriteonly /*Always zero*/)
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//===========================================================================
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// TODO: >= Apple2e only?
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BYTE __stdcall MemCheckPaging (WORD, WORD address, BYTE, BYTE, ULONG)
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BYTE __stdcall MemCheckPaging(WORD, WORD address, BYTE, BYTE, ULONG)
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{
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address &= 0xFF;
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BOOL result = 0;
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@ -1030,12 +975,8 @@ BYTE __stdcall MemCheckPaging (WORD, WORD address, BYTE, BYTE, ULONG)
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//===========================================================================
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void MemDestroy ()
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void MemDestroy()
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{
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//if (fastpaging)
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// MemSetFastPaging(0);
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// VirtualFree(memimage,MAX(0x30000,0x10000*1),MEM_DECOMMIT);
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VirtualFree(memaux ,0,MEM_RELEASE);
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VirtualFree(memmain ,0,MEM_RELEASE);
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VirtualFree(memdirty,0,MEM_RELEASE);
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@ -1178,10 +1119,6 @@ void MemInitialize()
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memmain = (LPBYTE)VirtualAlloc(NULL,_6502_MEM_END+1,MEM_COMMIT,PAGE_READWRITE);
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memdirty = (LPBYTE)VirtualAlloc(NULL,0x100 ,MEM_COMMIT,PAGE_READWRITE);
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memrom = (LPBYTE)VirtualAlloc(NULL,0x5000 ,MEM_COMMIT,PAGE_READWRITE);
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// // THE MEMIMAGE BUFFER CAN CONTAIN EITHER MULTIPLE MEMORY IMAGES OR ONE MEMORY IMAGE WITH COMPILER DATA
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// memimage = (LPBYTE)VirtualAlloc(NULL,
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// MAX(0x30000,MAXIMAGES*0x10000),
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// MEM_RESERVE,PAGE_NOACCESS);
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memimage = (LPBYTE)VirtualAlloc(NULL,_6502_MEM_END+1,MEM_RESERVE,PAGE_NOACCESS);
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pCxRomInternal = (LPBYTE) VirtualAlloc(NULL, CxRomSize, MEM_COMMIT, PAGE_READWRITE);
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@ -1198,7 +1135,6 @@ void MemInitialize()
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ExitProcess(1);
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}
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// LPVOID newloc = VirtualAlloc(memimage,0x30000,MEM_COMMIT,PAGE_READWRITE);
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LPVOID newloc = VirtualAlloc(memimage,_6502_MEM_END+1,MEM_COMMIT,PAGE_READWRITE);
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if (newloc != memimage)
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MessageBox(
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@ -1376,11 +1312,8 @@ inline DWORD getRandomTime()
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// . MemInitialize()
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// . ResetMachineState() eg. Power-cycle ('Apple-Go' button)
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// . Snapshot_LoadState()
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void MemReset ()
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void MemReset()
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{
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//// TURN OFF FAST PAGING IF IT IS CURRENTLY ACTIVE
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//MemSetFastPaging(0);
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// INITIALIZE THE PAGING TABLES
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ZeroMemory(memshadow,256*sizeof(LPBYTE));
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ZeroMemory(memwrite ,256*sizeof(LPBYTE));
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@ -1512,10 +1445,9 @@ void MemReset ()
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// SET UP THE MEMORY IMAGE
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mem = memimage;
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//image = 0;
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// INITIALIZE PAGING, FILLING IN THE 64K MEMORY IMAGE
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ResetPaging(1);
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ResetPaging(1); // Initialize=1
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// INITIALIZE & RESET THE CPU
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// . Do this after ROM has been copied back to mem[], so that PC is correctly init'ed from 6502's reset vector
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@ -1530,9 +1462,9 @@ void MemReset ()
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// Call by:
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// . Soft-reset (Ctrl+Reset)
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// . Snapshot_LoadState()
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void MemResetPaging ()
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void MemResetPaging()
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{
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ResetPaging(0);
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ResetPaging(0); // Initialize=0
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if (g_Apple2Type == A2TYPE_PRAVETS8A)
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{
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P8CAPS_ON = false;
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@ -1543,21 +1475,6 @@ void MemResetPaging ()
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//===========================================================================
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// Called by Disk][ I/O only
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BYTE MemReturnRandomData(BYTE highbit)
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{
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static const BYTE retval[16] = {
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0x00,0x2D,0x2D,0x30,0x30,0x32,0x32,0x34,
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0x35,0x39,0x43,0x43,0x43,0x60,0x7F,0x7F };
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BYTE r = (BYTE)(rand() & 0xFF);
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if (r <= 170)
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return 0x20 | (highbit ? 0x80 : 0);
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else
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return retval[r & 15] | (highbit ? 0x80 : 0);
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}
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//===========================================================================
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BYTE MemReadFloatingBus(const ULONG uExecutedCycles)
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{
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return*(LPBYTE)(mem + VideoGetScannerAddress(NULL, uExecutedCycles));
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@ -1571,26 +1488,6 @@ BYTE MemReadFloatingBus(const BYTE highbit, const ULONG uExecutedCycles)
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return (r & ~0x80) | ((highbit) ? 0x80 : 0);
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}
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//===========================================================================
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//void MemSetFastPaging (BOOL on) {
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// if (fastpaging && modechanging) {
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// modechanging = 0;
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// UpdateFastPaging();
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// }
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// else if (!fastpaging) {
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// BackMainImage();
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// if (lastimage >= 3)
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// VirtualFree(memimage+0x30000,(lastimage-2) << 16,MEM_DECOMMIT);
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// }
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// fastpaging = on;
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// image = 0;
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// mem = memimage;
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// lastimage = 0;
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// imagemode[0] = memmode;
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// if (!fastpaging)
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// UpdatePaging(1,0);
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//}
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//===========================================================================
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//#define DEBUG_FLIP_TIMINGS
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@ -1625,7 +1522,7 @@ static void DebugFlip(WORD address, ULONG nCyclesLeft)
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}
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#endif
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BYTE __stdcall MemSetPaging (WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
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BYTE __stdcall MemSetPaging(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCyclesLeft)
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{
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address &= 0xFF;
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DWORD lastmemmode = memmode;
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@ -1673,12 +1570,7 @@ BYTE __stdcall MemSetPaging (WORD programcounter, WORD address, BYTE write, BYTE
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if ((value < g_uMaxExPages) && RWpages[value])
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{
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memaux = RWpages[value];
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//memmode &= ~MF_RWPMASK;
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//memmode |= value;
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//if (fastpaging)
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// UpdateFastPaging();
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//else
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UpdatePaging(0,0);
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UpdatePaging(0); // Initialize=0
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}
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break;
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#endif
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@ -1732,17 +1624,7 @@ BYTE __stdcall MemSetPaging (WORD programcounter, WORD address, BYTE write, BYTE
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}
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}
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//// IF FAST PAGING IS ACTIVE, WE KEEP MULTIPLE COMPLETE MEMORY IMAGES
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//// AND WRITE TABLES, AND SWITCH BETWEEN THEM. THE FAST PAGING VERSION
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//// OF THE CPU EMULATOR KEEPS ALL OF THE IMAGES COHERENT.
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//if (fastpaging)
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// UpdateFastPaging();
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// IF FAST PAGING IS NOT ACTIVE THEN WE KEEP ONLY ONE MEMORY IMAGE AND
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// WRITE TABLE, AND UPDATE THEM EVERY TIME PAGING IS CHANGED.
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//else
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UpdatePaging(0,0);
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UpdatePaging(0); // Initialize=0
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}
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if ((address <= 1) || ((address >= 0x54) && (address <= 0x57)))
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@ -1752,36 +1634,8 @@ BYTE __stdcall MemSetPaging (WORD programcounter, WORD address, BYTE write, BYTE
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}
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//===========================================================================
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//void MemTrimImages () {
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// if (fastpaging && (lastimage > 2))
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// {
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// if (modechanging) {
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// modechanging = 0;
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// UpdateFastPaging();
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// }
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// static DWORD trimnumber = 0;
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// if ((image != trimnumber) &&
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// (image != lastimage) &&
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// (trimnumber < lastimage)) {
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// imagemode[trimnumber] = imagemode[lastimage];
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// VirtualFree(memimage+(lastimage-- << 16),0x10000,MEM_DECOMMIT);
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// DWORD realimage = image;
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// image = trimnumber;
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// mem = memimage+(image << 16);
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// memmode = imagemode[image];
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// UpdatePaging(1,0);
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// image = realimage;
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// mem = memimage+(image << 16);
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// memmode = imagemode[image];
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// }
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// if (++trimnumber >= lastimage)
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// trimnumber = 0;
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// }
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//}
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//===========================================================================
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|
||||
LPVOID MemGetSlotParameters (UINT uSlot)
|
||||
LPVOID MemGetSlotParameters(UINT uSlot)
|
||||
{
|
||||
_ASSERT(uSlot < NUM_SLOTS);
|
||||
return SlotParameters[uSlot];
|
||||
@ -1820,7 +1674,7 @@ DWORD MemSetSnapshot(SS_BaseMemory* pSS)
|
||||
|
||||
modechanging = 0;
|
||||
|
||||
UpdatePaging(1,0); // Initialize=1, UpdateWriteOnly=0
|
||||
UpdatePaging(1); // Initialize=1
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -49,7 +49,6 @@ BYTE MemReadFloatingBus(const BYTE highbit, const ULONG uExecutedCycles);
|
||||
void MemReset ();
|
||||
void MemResetPaging ();
|
||||
void MemUpdatePaging(BOOL initialize);
|
||||
BYTE MemReturnRandomData (BYTE highbit);
|
||||
LPVOID MemGetSlotParameters (UINT uSlot);
|
||||
DWORD MemGetSnapshot(SS_BaseMemory* pSS);
|
||||
DWORD MemSetSnapshot(SS_BaseMemory* pSS);
|
||||
|
||||
@ -195,6 +195,7 @@ void CMouseInterface::Reset()
|
||||
m_by6821B = 0x40; // Set PB6
|
||||
m_6821.SetPB(m_by6821B);
|
||||
m_bVBL = false;
|
||||
m_byMode = 0;
|
||||
|
||||
//
|
||||
|
||||
@ -474,6 +475,9 @@ void CMouseInterface::OnMouseEvent(bool bEventVBL)
|
||||
|
||||
void CMouseInterface::SetVBlank(bool bVBL)
|
||||
{
|
||||
if (!m_bActive)
|
||||
return;
|
||||
|
||||
if ( m_bVBL != bVBL )
|
||||
{
|
||||
m_bVBL = bVBL;
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user