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95 lines
1.9 KiB
C++
95 lines
1.9 KiB
C++
#ifndef __APPLEMMU_H
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#define __APPLEMMU_H
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#include <stdlib.h>
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#include "appledisplay.h"
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#include "slot.h"
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#include "mmu.h"
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// when we read a nondeterministic result, we return FLOATING. Maybe
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// some day we can come back here and figure out how to return what
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// the Apple would have.
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#define FLOATING 0
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// Switches activated by various memory locations
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enum {
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S_TEXT = 0x0001,
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S_MIXED = 0x0002,
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S_HIRES = 0x0004,
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S_PAGE2 = 0x0008,
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S_80COL = 0x0010,
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S_ALTCH = 0x0020,
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S_80STORE = 0x0040,
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S_DHIRES = 0x0080
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};
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typedef bool (*callback_t)(void *);
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class AppleVM;
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class AppleMMU : public MMU {
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friend class AppleVM;
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public:
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AppleMMU(AppleDisplay *display);
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virtual ~AppleMMU();
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virtual uint8_t read(uint16_t address);
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virtual uint8_t readDirect(uint16_t address, uint8_t fromPage);
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virtual void write(uint16_t address, uint8_t v);
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virtual void Reset();
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void keyboardInput(uint8_t v);
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void setKeyDown(bool isTrue);
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void triggerPaddleTimer(uint8_t paddle);
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void resetRAM(); // used by BIOS on cold boot
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void setSlot(int8_t slotnum, Slot *peripheral);
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protected:
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void allocateMemory();
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void resetDisplay();
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uint8_t readSwitches(uint16_t address);
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void writeSwitches(uint16_t address, uint8_t v);
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void handleMemorySwitches(uint16_t address, uint16_t lastSwitch);
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void updateMemoryPages();
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private:
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AppleDisplay *display;
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uint16_t switches;
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public: // 'public' for debugging
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bool auxRamRead;
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bool auxRamWrite;
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bool bank2;
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bool readbsr;
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bool writebsr;
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bool altzp;
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bool intcxrom;
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bool slot3rom;
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int8_t slotLatch;
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bool preWriteFlag; // see UTA2E p. 5-23
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Slot *slots[8]; // slots 0-7
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uint8_t *ramPages[0x100][5];
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uint8_t *readPages[0x100];
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uint8_t *writePages[0x100];
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uint8_t keyboardStrobe;
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bool anyKeyDown;
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public:
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// FIXME: build a private API for these
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bool isOpenApplePressed;
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bool isClosedApplePressed;
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};
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#endif
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