@@ 1,5 1,5 @@ 
 /*
- * Copyright (c) 2022-2024 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
+ * Copyright (c) 2022-2025 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

          
@@ 52,6 52,8 @@ 
 #include "arch/atmega48p_usart.h"
 #elif defined(MCU_ATTINY13A)
 #include "arch/attiny13a.h"
+#elif defined(MCU_ATTINY12)
+/* nothing for now */
 #else
 #error "Unknown MCU type"
 #endif

          

@@ 0,0 1,37 @@ 
+/*
+ * Copyright (c) 2025 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef AVR_COMMON_ARCH_ATTINY12_H
+#define AVR_COMMON_ARCH_ATTINY12_H
+
+/* the built-in oscillator runs at 1.2MHz */
+#ifndef MCU_RAW_FREQ
+#define MCU_RAW_FREQ	1200000
+#endif
+
+/* there is no RAM */
+#undef RAM_START_ADDR
+#undef RAM_END_ADDR
+
+#include "attiny12_pins.h"
+
+#endif