cortexelf-v1: doodling with 1802 bits

[fw/altos] / src / cortexelf-v1 / ao_1802.h

diff --git a/src/cortexelf-v1/ao_1802.h b/src/cortexelf-v1/ao_1802.h
new file mode 100644 (file)
index 0000000..daa49f6
--- /dev/null
+++ b/src/cortexelf-v1/ao_1802.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2017 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _AO_1802_H_
+#define _AO_1802_H_
+
+/* Signals muxed between 1802 and STM */
+extern uint8_t         MRD, TPB, TPA, MWR;
+
+/* Decoded address driven by TPA/TPB signals */
+extern uint16_t                ADDRESS;
+
+/* Decoded data, driven by TPB signal */
+extern uint8_t         DATA;
+
+extern uint8_t         SC;
+
+#define SC_FETCH       0
+#define SC_EXECUTE     1
+#define SC_DMA         2
+#define SC_INTERRUPT   3
+
+#endif /* _AO_1802_H_ */