1 files changed, 56 insertions, 0 deletions

diff --git a/src/uxn.h b/src/uxn.h
new file mode 100644
index 0000000..a4ab428
--- /dev/null
+++ b/src/uxn.h
@@ -0,0 +1,56 @@
+#ifndef UXNGBA_UXN_H
+#define UXNGBA_UXN_H
+
+#include <stdio.h>
+
+/*
+Copyright (c) 2021 Devine Lu Linvega
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE.
+*/
+
+#define PAGE_PROGRAM 0x0100
+
+typedef struct {
+        u8 ptr, kptr, error;
+        u8 dat[256];
+} Stack;
+
+typedef struct {
+        u16 ptr;
+        u8 *dat;
+} Memory;
+
+typedef struct Device {
+        struct Uxn *u;
+        u8 addr, dat[16], *mem;
+        void (*talk)(struct Device *d, u8, u8);
+} Device;
+
+typedef struct Uxn {
+        Stack wst, rst, *src, *dst;
+        Memory ram;
+        Device dev[16];
+} Uxn;
+
+struct Uxn;
+
+static inline void mempoke8(u8 *m, u16 a, u8 b) { m[a] = b; }
+static inline u8 mempeek8(u8 *m, u16 a) { return m[a]; }
+static inline void mempoke16(u8 *m, u16 a, u16 b) { mempoke8(m, a, b >> 8); mempoke8(m, a + 1, b); }
+static inline u16 mempeek16(u8 *m, u16 a) { return (mempeek8(m, a) << 8) + mempeek8(m, a + 1); }
+static inline void devpoke8(Device *d, u8 a, u8 b) { d->dat[a & 0xf] = b; d->talk(d, a & 0x0f, 1); }
+static inline u8 devpeek8(Device *d, u8 a) { d->talk(d, a & 0x0f, 0); return d->dat[a & 0xf];  }
+static inline void devpoke16(Device *d, u8 a, u16 b) { devpoke8(d, a, b >> 8); devpoke8(d, a + 1, b); }
+static inline u16 devpeek16(Device *d, u16 a) { return (devpeek8(d, a) << 8) + devpeek8(d, a + 1); }
+
+int loaduxn(Uxn *c, char *filepath);
+int bootuxn(Uxn *c);
+int evaluxn(Uxn *u, u16 vec);
+Device *portuxn(Uxn *u, u8 id, char *name, void (*talkfn)(Device *, u8, u8));
+#endif // UXNGBA_UXN_H