add zz9k_env

include/zz9k_env.h

+/*
+ * MNT ZZ9000 Amiga Graphics and ARM Coprocessor SDK
+ * Copyright (C) 2019, Lukas F. Hartmann <lukas@mntre.com>
+ *                     MNT Research GmbH, Berlin
+ *                     https://mntre.com
+ *
+ * More Info: https://mntre.com/zz9000
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * GNU General Public License v3.0 or later
+ *
+ * https://spdx.org/licenses/GPL-3.0-or-later.html
+ */
+
+#ifndef ZZ9K_ENV_H
+#define ZZ9K_ENV_H
+
+struct ZZ9K_ENV {
+  uint32_t api_version;
+  uint32_t argv[8];
+  uint32_t argc;
+
+  int      (*putchar)(char);
+  void     (*set_output_putchar_to_events)(char);
+  void     (*set_output_events_blocking)(char);
+  void     (*put_event_code)(uint16_t);
+  uint16_t (*get_event_serial)();
+  uint16_t (*get_event_code)();
+  char     (*output_event_acked)();
+};
+
+#endif