initial commit

1 files changed, 55 insertions, 0 deletions

diff --git a/cart.h b/cart.h
new file mode 100644
index 0000000..f2b10a4
--- /dev/null
+++ b/cart.h
@@ -0,0 +1,55 @@
+
+/* CART header support for cart2xex
+
+	Format of CART header (from atari800 cart.txt):
+
+ first 4 bytes containing 'C' 'A' 'R' 'T'.
+ next 4 bytes containing cartridge type in MSB format (see the table below).
+ next 4 bytes containing cartridge checksum in MSB format (ROM only).
+ next 4 bytes are currently unused (zero).
+ followed immediately with the ROM data: 4, 8, 16, 32, 40, 64, 128, 256, 512
+ or 1024 kilobytes.
+
+ See cart.c for the list of cart types.
+*/
+
+#ifndef CART_H
+#define CART_H
+
+#define CART_SIGNATURE "CART"
+
+#define CART_SIGNATURE_OFFSET 0
+#define CART_TYPE_OFFSET 4
+#define CART_CHECKSUM_OFFSET 8
+#define CART_UNUSED_OFFSET 12
+
+typedef enum {
+	M_INVALID,
+	M_ATARI8,
+	M_5200
+} machine_t;
+
+typedef struct {
+	int machine;
+	int size;
+	char *name;
+} cart_t;
+
+extern cart_t cart_types[];
+extern const int MAX_CART_TYPE;
+
+int has_cart_signature(unsigned char *cart);
+void cart_dump_header(unsigned char *cart, int calc_cksum);
+unsigned int get_cart_type(unsigned char *cart);
+unsigned int get_cart_size(unsigned char *cart);
+unsigned int get_cart_checksum(unsigned char *cart);
+machine_t get_cart_machine(unsigned char *cart);
+unsigned int calc_rom_checksum(unsigned char *rom, int bytes);
+unsigned int cart_checksum_ok(unsigned char *cart);
+int create_cart_header(
+		unsigned char *buffer, unsigned char *rom, unsigned int type);
+void set_cart_checksum(unsigned char *cart, unsigned int sum);
+void set_cart_type(unsigned char *cart, unsigned int type);
+void set_cart_unused(unsigned char *cart, unsigned int data);
+
+#endif