OSD option to switch CPU type NMOS/CMOS.

TSConf.sv

@@ -115,6 +115,7 @@ localparam CONF_STR = {
 	"O34,Stereo mix,None,25%,50%,100%;",
 	"OST,General Sound,512KB,1MB,2MB;",
 	"-;",
+	"OU,CPU Type,NMOS,CMOS;",
 	"O67,CPU Speed,3.5MHz,7MHz,14MHz;",
 	"O8,CPU Cache,On,Off;",
 	"O9A,#7FFD span,128K,128K Auto,1024K,512K;",
@@ -294,6 +295,7 @@ tsconf tsconf
 	.WARM_RESET(buttons[1]),
 	.RESET_OUT(reset),
 	.RTC(RTC),
+	.OUT0(status[30]),
 
 	.CMOSCfg(CMOSCfg),
 

src/t80/T80.vhd

@@ -118,6 +118,7 @@ entity T80 is
 		IntCycle_n : out std_logic;
 		IntE       : out std_logic;
 		Stop       : out std_logic;
+		out0       : in  std_logic := '0';  -- 0 => OUT(C),0, 1 => OUT(C),255
 		REG	     : out std_logic_vector(207 downto 0) -- IY, HL', DE', BC', IX, HL, DE, BC, PC, SP, R, I, F', A', F, A
 	);
 end T80;
@@ -971,7 +972,11 @@ begin
 			when "1101" =>
 				BusB <= std_logic_vector(PC(15 downto 8));
 			when "1110" =>
+				if IR = x"71" and out0 = '1' then
+					BusB <= "11111111";
+				else
 					BusB <= "00000000";
+				end if;
 			when others =>
 				BusB <= "--------";
 			end case;

src/t80/T80_Pack.vhd

@@ -106,6 +106,7 @@ package T80_Pack is
 		TS              : out std_logic_vector(2 downto 0);
 		IntCycle_n      : out std_logic;
 		IntE            : out std_logic;
+		out0            : in  std_logic := '0';  -- 0 => OUT(C),0, 1 => OUT(C),255
 		Stop            : out std_logic;
 		REG             : out std_logic_vector(207 downto 0) -- IY, HL', DE', BC', IX, HL, DE, BC, PC, SP, R, I, F', A', F, A
 	);

src/t80/T80s.vhd

@@ -92,6 +92,7 @@ entity T80s is
 		RFSH_n		: out std_logic;
 		HALT_n		: out std_logic;
 		BUSAK_n		: out std_logic;
+		OUT0        : in  std_logic := '0';  -- 0 => OUT(C),0, 1 => OUT(C),255
 		A				: out std_logic_vector(15 downto 0);
 		DI				: in std_logic_vector(7 downto 0);
 		DO				: out std_logic_vector(7 downto 0)
@@ -135,6 +136,7 @@ begin
 			DO => DO,
 			MC => MCycle,
 			TS => TState,
+			OUT0 => OUT0,
 			IntCycle_n => IntCycle_n
 		);
 

src/tsconf.v

@@ -99,12 +99,13 @@ module tsconf
 	output [15:0] SOUND_L,
 	output [15:0] SOUND_R,
 
-   // External I/O
+	// Misc. I/O
 	input         COLD_RESET,
 	input         WARM_RESET,
 	output        RESET_OUT,
 	input  [64:0] RTC,
 	input  [31:0] CMOSCfg,
+	input         OUT0,
 
 	// PS/2 Keyboard
 	input  [10:0] PS2_KEY,
@@ -340,6 +341,7 @@ T80s CPU
 	.RD_n(cpu_rd_n),
 	.WR_n(cpu_wr_n),
 	.RFSH_n(cpu_rfsh_n),
+	.OUT0(OUT0),
 	.A(cpu_a_bus),
 	.DI(cpu_di_bus),
 	.DO(cpu_do_bus)