initial commit

atari800/src/xep80.h

@@ -0,0 +1,56 @@
+#ifndef XEP80_H_
+#define XEP80_H_
+
+#include "config.h"
+#include "atari.h"
+
+#define XEP80_WIDTH 256
+#define XEP80_HEIGHT 25
+#define XEP80_CHAR_WIDTH 7
+#define XEP80_MAX_CHAR_HEIGHT 12
+#define XEP80_GRAPH_WIDTH 320
+#define XEP80_GRAPH_HEIGHT 200
+#define XEP80_LINE_LEN 80
+#define XEP80_SCRN_WIDTH (XEP80_LINE_LEN * XEP80_CHAR_WIDTH)
+#define XEP80_MAX_SCRN_HEIGHT (XEP80_HEIGHT * XEP80_MAX_CHAR_HEIGHT)
+
+/* Current height of the XEP80 screen */
+extern int XEP80_scrn_height;
+/* Current height of XEP80 characters. */
+extern int XEP80_char_height;
+
+/* XEP80 hardware is TV system-independent - it can switch to NTSC or PAL
+   (or "60Hz" and "50Hz" modes, as they're called in the docs). In each mode
+   number of lines per each char varies as defined below.
+   NTSC screenshots:
+     http://www.atariage.com/forums/topic/108601-what-does-xep80-display-look-like/page__p__1314304#entry1314304
+     http://www.atariage.com/forums/topic/171976-xep80-looks-like-this-on-real-hardware/page__p__2130114#entry2130114
+     http://www.atariage.com/forums/topic/124642-atari-8-bit-sc1224-bw-greyscale-monitor-interface/page__view__findpost__p__1508084
+   PAL screenshots:
+     http://www.atariage.com/forums/topic/134208-atari-8-bit-irc-client-fujichat-03-released/page__p__1617958#entry1617958
+     http://www.atari.org.pl/forum/viewtopic.php?pid=142647#p142647 (sign in to see) */
+enum {
+	XEP80_CHAR_HEIGHT_NTSC = 10,
+	XEP80_CHAR_HEIGHT_PAL = 12
+};
+
+#define XEP80_ATARI_EOL			0x9b
+
+/* Is XEP80 enabled? Don't change directly, use XEP80_SetEnabled(). */
+extern int XEP80_enabled;
+int XEP80_SetEnabled(int value);
+extern int XEP80_port;
+
+extern UBYTE XEP80_screen_1[XEP80_SCRN_WIDTH*XEP80_MAX_SCRN_HEIGHT];
+extern UBYTE XEP80_screen_2[XEP80_SCRN_WIDTH*XEP80_MAX_SCRN_HEIGHT];
+
+UBYTE XEP80_GetBit(void);
+void XEP80_PutBit(UBYTE byte);
+void XEP80_ChangeColors(void);
+void XEP80_StateSave(void);
+void XEP80_StateRead(void);
+int XEP80_ReadConfig(char *string, char *ptr);
+void XEP80_WriteConfig(FILE *fp);
+int XEP80_Initialise(int *argc, char *argv[]);
+
+#endif /* XEP80_H_ */