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

1 files changed, 135 insertions, 0 deletions

diff --git a/apps/plugins/rockboy/rtc.c b/apps/plugins/rockboy/rtc.c
new file mode 100644
index 0000000..99e71dc
--- /dev/null
+++ b/apps/plugins/rockboy/rtc.c
@@ -0,0 +1,135 @@
+
+
+
+#include "rockmacros.h"
+#include <stdio.h>
+
+#include "defs.h"
+#include "mem.h"
+#include "rtc.h"
+#include "rc.h"
+
+struct rtc rtc;
+
+static int syncrtc = 1;
+
+rcvar_t rtc_exports[] =
+{
+	RCV_BOOL("syncrtc", &syncrtc),
+	RCV_END
+};
+
+
+void rtc_latch(byte b)
+{
+	if ((rtc.latch ^ b) & b & 1)
+	{
+		rtc.regs[0] = rtc.s;
+		rtc.regs[1] = rtc.m;
+		rtc.regs[2] = rtc.h;
+		rtc.regs[3] = rtc.d;
+		rtc.regs[4] = (rtc.d>>9) | (rtc.stop<<6) | (rtc.carry<<7);
+		rtc.regs[5] = 0xff;
+		rtc.regs[6] = 0xff;
+		rtc.regs[7] = 0xff;
+	}
+	rtc.latch = b;
+}
+
+void rtc_write(byte b)
+{
+	/* printf("write %02X: %02X (%d)\n", rtc.sel, b, b); */
+	if (!(rtc.sel & 8)) return;
+	switch (rtc.sel & 7)
+	{
+	case 0:
+		rtc.s = rtc.regs[0] = b;
+		while (rtc.s >= 60) rtc.s -= 60;
+		break;
+	case 1:
+		rtc.m = rtc.regs[1] = b;
+		while (rtc.m >= 60) rtc.m -= 60;
+		break;
+	case 2:
+		rtc.h = rtc.regs[2] = b;
+		while (rtc.h >= 24) rtc.h -= 24;
+		break;
+	case 3:
+		rtc.regs[3] = b;
+		rtc.d = (rtc.d & 0x100) | b;
+		break;
+	case 4:
+		rtc.regs[4] = b;
+		rtc.d = (rtc.d & 0xff) | ((b&1)<<9);
+		rtc.stop = (b>>6)&1;
+		rtc.carry = (b>>7)&1;
+		break;
+	}
+}
+
+void rtc_tick()
+{
+	if (rtc.stop) return;
+	if (++rtc.t == 60)
+	{
+		if (++rtc.s == 60)
+		{
+			if (++rtc.m == 60)
+			{
+				if (++rtc.h == 24)
+				{
+					if (++rtc.d == 365)
+					{
+						rtc.d = 0;
+						rtc.carry = 1;
+					}
+					rtc.h = 0;
+				}
+				rtc.m = 0;
+			}
+			rtc.s = 0;
+		}
+		rtc.t = 0;
+	}
+}
+
+void rtc_save_internal(int fd)
+{
+	(void)fd; // stop compiler complaining
+	// TODO
+//	fprintf(f, "%d %d %d %02d %02d %02d %02d\n%d\n",
+//		rtc.carry, rtc.stop, rtc.d, rtc.h, rtc.m, rtc.s, rtc.t,
+//		time(0));
+}
+
+void rtc_load_internal(int fd)
+{
+	//int rt = 0;
+	(void)fd; // stop compiler complaining
+	// TODO
+/*	fscanf(
+		f, "%d %d %d %02d %02d %02d %02d\n%d\n",
+		&rtc.carry, &rtc.stop, &rtc.d,
+		&rtc.h, &rtc.m, &rtc.s, &rtc.t, &rt);
+	while (rtc.t >= 60) rtc.t -= 60;
+	while (rtc.s >= 60) rtc.s -= 60;
+	while (rtc.m >= 60) rtc.m -= 60;
+	while (rtc.h >= 24) rtc.h -= 24;
+	while (rtc.d >= 365) rtc.d -= 365;
+	rtc.stop &= 1;
+	rtc.carry &= 1;
+	if (rt) rt = (time(0) - rt) * 60;
+	if (syncrtc) while (rt-- > 0) rtc_tick(); */
+}
+
+
+
+
+
+
+
+
+
+
+
+