Rockboy - gameboy emulation for rockbox, based on gnuboy. Still a bit early, but already playable on iRiver H1xx and the simulators. The archos recorder version is currently rather slow...

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6104 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/rockboy/emu.c

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+
+
+
+#include "rockmacros.h"
+#include "defs.h"
+#include "regs.h"
+#include "hw.h"
+#include "cpu.h"
+#include "mem.h"
+#include "lcd.h"
+#include "rc.h"
+#include "sound.h"
+#include "rtc.h"
+
+static int framelen = 16743;
+static int framecount;
+
+rcvar_t emu_exports[] =
+{
+	RCV_INT("framelen", &framelen),
+	RCV_INT("framecount", &framecount),
+	RCV_END
+};
+
+
+
+
+
+
+
+void emu_init(void)
+{
+	
+}
+
+
+/*
+ * emu_reset is called to initialize the state of the emulated
+ * system. It should set cpu registers, hardware registers, etc. to
+ * their appropriate values at powerup time.
+ */
+
+void emu_reset(void)
+{
+	hw_reset();
+	lcd_reset();
+	cpu_reset();
+	mbc_reset();
+	sound_reset();
+}
+
+
+
+
+
+void emu_step(void)
+{
+	cpu_emulate(cpu.lcdc);
+}
+
+
+
+/* This mess needs to be moved to another module; it's just here to
+ * make things work in the mean time. */
+
+void emu_run(void)
+{
+	void *timer = sys_timer();
+	char meow[500];
+	int delay;
+	int framecount=0;
+
+	vid_begin();
+	lcd_begin();
+	while(shut==0)
+	{
+		cpu_emulate(2280);
+		while (R_LY > 0 && R_LY < 144)
+			emu_step();
+		
+		vid_end();
+		rtc_tick();
+		sound_mix();
+		if (!pcm_submit())
+		{
+			delay = framelen - sys_elapsed(timer);
+			sys_sleep(delay);
+			sys_elapsed(timer);
+		}
+		doevents();
+		vid_begin();
+//		if (framecount) { if (!--framecount) die("finished\n"); }
+		
+		if (!(R_LCDC & 0x80))
+			cpu_emulate(32832);
+		
+		while (R_LY > 0) /* wait for next frame */
+			emu_step();
+		framecount++;
+		snprintf(meow,499,"%d",framecount);
+		rb->lcd_putsxy(0,0,meow);
+		rb->lcd_update_rect(0,0,LCD_WIDTH,8);
+		rb->yield();
+	}
+}
+
+
+
+
+
+
+
+
+
+
+
+