diff --git a/src/devices/cpu/tms1000/tms1000.cpp b/src/devices/cpu/tms1000/tms1000.cpp
index a1b543a846c..2dbc2c86a1a 100644
--- a/src/devices/cpu/tms1000/tms1000.cpp
+++ b/src/devices/cpu/tms1000/tms1000.cpp
@@ -2,7 +2,12 @@
 // copyright-holders:hap
 /*
 
-  TMS1000 family - TMS1000, TMS1070, TMS1040, TMS1200, TMS1700, TMS1730
+  TMS1000 family - TMS1000, TMS1070, TMS1040, TMS1200, TMS1700, TMS1730,
+  and second source Motorola MC141000, MC141200.
+  
+  TODO:
+  - add TMS1270 (10 O pins, how does that work?)
+  - add TMS1000C, TMS1200C (CMOS, and 3-level stack)
 
 */
 
@@ -23,10 +28,12 @@ const device_type TMS1000 = device_creator<tms1000_cpu_device>; // 28-pin DIP, 1
 const device_type TMS1070 = device_creator<tms1070_cpu_device>; // high voltage version
 const device_type TMS1040 = device_creator<tms1040_cpu_device>; // same as TMS1070 with just a different pinout?
 const device_type TMS1200 = device_creator<tms1200_cpu_device>; // 40-pin DIP, 13 R pins
-// TMS1270 has 10 O pins, how does that work?
 const device_type TMS1700 = device_creator<tms1700_cpu_device>; // 28-pin DIP, RAM/ROM size halved, 9 R pins
 const device_type TMS1730 = device_creator<tms1730_cpu_device>; // 20-pin DIP, same die as TMS1700, package has less pins: 6 R pins, 5 O pins(output PLA is still 8-bit, O1,O3,O5 unused)
 
+const device_type MC141000 = device_creator<mc141000_cpu_device>; // CMOS, pin-compatible with TMS1000(reverse polarity)
+const device_type MC141200 = device_creator<mc141200_cpu_device>; // CMOS, 40-pin DIP, 16 R pins
+
 
 // internal memory maps
 static ADDRESS_MAP_START(program_10bit_8, AS_PROGRAM, 8, tms1k_base_device)
@@ -76,6 +83,14 @@ tms1730_cpu_device::tms1730_cpu_device(const machine_config &mconfig, const char
 	: tms1000_cpu_device(mconfig, TMS1730, "TMS1730", tag, owner, clock, 8, 9, 6, 8, 2, 10, ADDRESS_MAP_NAME(program_9bit_8), 6, ADDRESS_MAP_NAME(data_32x4), "tms1730", __FILE__)
 { }
 
+mc141000_cpu_device::mc141000_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: tms1000_cpu_device(mconfig, MC141000, "MC141000", tag, owner, clock, 8, 11, 6, 8, 2, 10, ADDRESS_MAP_NAME(program_10bit_8), 6, ADDRESS_MAP_NAME(data_64x4), "mc141000", __FILE__)
+{ }
+
+mc141200_cpu_device::mc141200_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: tms1000_cpu_device(mconfig, MC141200, "MC141200", tag, owner, clock, 8, 16, 6, 8, 2, 10, ADDRESS_MAP_NAME(program_10bit_8), 6, ADDRESS_MAP_NAME(data_64x4), "mc141200", __FILE__)
+{ }
+
 
 // machine configs
 static MACHINE_CONFIG_FRAGMENT(tms1000)
diff --git a/src/devices/cpu/tms1000/tms1000.h b/src/devices/cpu/tms1000/tms1000.h
index 7e2ac9c0822..c1ccb3d52f2 100644
--- a/src/devices/cpu/tms1000/tms1000.h
+++ b/src/devices/cpu/tms1000/tms1000.h
@@ -60,11 +60,26 @@ public:
 };
 
 
+class mc141000_cpu_device : public tms1000_cpu_device
+{
+public:
+	mc141000_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+};
+
+class mc141200_cpu_device : public tms1000_cpu_device
+{
+public:
+	mc141200_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+};
+
+
 extern const device_type TMS1000;
 extern const device_type TMS1070;
 extern const device_type TMS1040;
 extern const device_type TMS1200;
 extern const device_type TMS1700;
 extern const device_type TMS1730;
+extern const device_type MC141000;
+extern const device_type MC141200;
 
 #endif /* _TMS1000_H_ */
diff --git a/src/devices/cpu/tms1000/tms1k_base.cpp b/src/devices/cpu/tms1000/tms1k_base.cpp
index 8ea2eedfec8..155b27ddc4d 100644
--- a/src/devices/cpu/tms1000/tms1k_base.cpp
+++ b/src/devices/cpu/tms1000/tms1k_base.cpp
@@ -6,6 +6,7 @@
 
   TODO:
   - fix debugger disasm view
+  - INIT pin
 
 
 The TMS0980 and TMS1000-family MCU cores are very similar. The TMS0980 has a