initial upload

2024-02-05 03:09:55 -08:00
commit 05f3df8be3
9 changed files with 2598 additions and 0 deletions
--- a/src/interupts.cpp
+++ b/src/interupts.cpp
@@ -0,0 +1,78 @@
+#include "defines.hpp"
+#include "gameboy.hpp"
+
+bool GameBoy::testInterruptEnabled(Byte interrupt)
+{
+	return (*IE) & (Byte) (1 << interrupt);
+}
+
+void GameBoy::resetInterrupt(Byte interrupt)
+{
+	*IF &= ~(1 << interrupt);
+}
+
+void GameBoy::interruptHandler()
+{
+	if(!IME)
+		return;
+
+	if(*IF & (Byte) (1 << VBLANK_INTERRUPT) && testInterruptEnabled(VBLANK_INTERRUPT))
+		VBlankHandle();
+	if(*IF & (Byte) (1 << LCD_STAT_INTERRUPT) && testInterruptEnabled(LCD_STAT_INTERRUPT))
+		LCDStatHandle();
+	if(*IF & (Byte) (1 << TIMER_INTERRUPT) && testInterruptEnabled(TIMER_INTERRUPT))
+		timerHandle();
+	if(*IF & (Byte) (1 << SERIAL_INTERRUPT)	&& testInterruptEnabled(SERIAL_INTERRUPT))
+		serialHandle();
+	if(*IF & (Byte) (1 << JOYPAD_INTERRUPT)	&& testInterruptEnabled(JOYPAD_INTERRUPT))
+		joypadHandle();
+}
+
+void GameBoy::VBlankHandle()
+{
+	printf("VBlank interrupt");
+	IME = 0;
+	push(PC);
+	PC = 0x40;
+	resetInterrupt(VBLANK_INTERRUPT);
+}
+
+void GameBoy::LCDStatHandle()
+{
+	printf("LCD stat interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x48;
+	resetInterrupt(LCD_STAT_INTERRUPT);
+}
+
+void GameBoy::timerHandle()
+{
+	printf("timer interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x50;
+	resetInterrupt(TIMER_INTERRUPT);
+}
+
+void GameBoy::serialHandle()
+{
+	printf("serial interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x58;
+	resetInterrupt(SERIAL_INTERRUPT);
+}
+
+void GameBoy::joypadHandle()
+{
+	printf("joypad interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x60;
+	resetInterrupt(JOYPAD_INTERRUPT);
+}