349 lines
13 KiB
VHDL
349 lines
13 KiB
VHDL
----------------------------------------------------------------------------------
|
|
-- Company:
|
|
-- Engineer:
|
|
--
|
|
-- Create Date: 22:08:29 12/13/2016
|
|
-- Design Name:
|
|
-- Module Name: LAN_IDE_CP - Behavioral
|
|
-- Project Name:
|
|
-- Target Devices:
|
|
-- Tool versions:
|
|
-- Description:
|
|
--
|
|
-- Dependencies:
|
|
--
|
|
-- Revision:
|
|
-- Revision 0.01 - File Created
|
|
-- Additional Comments:
|
|
--
|
|
----------------------------------------------------------------------------------
|
|
library IEEE;
|
|
use IEEE.STD_LOGIC_1164.ALL;
|
|
|
|
-- Uncomment the following library declaration if using
|
|
-- arithmetic functions with Signed or Unsigned values
|
|
--use IEEE.NUMERIC_STD.ALL;
|
|
|
|
-- Uncomment the following library declaration if instantiating
|
|
-- any Xilinx primitives in this code.
|
|
--library UNISIM;
|
|
--use UNISIM.VComponents.all;
|
|
|
|
entity LAN_IDE_CP is
|
|
Port ( A : inout STD_LOGIC_VECTOR (23 downto 1);
|
|
D : inout STD_LOGIC_VECTOR (15 downto 0);
|
|
DQ : inout STD_LOGIC_VECTOR (15 downto 0);
|
|
A_LAN : out STD_LOGIC_VECTOR (13 downto 0);
|
|
OWN : out STD_LOGIC;
|
|
SLAVE : out STD_LOGIC;
|
|
CFOUT : out STD_LOGIC;
|
|
CFIN : in STD_LOGIC;
|
|
C1 : in STD_LOGIC;
|
|
C3 : in STD_LOGIC;
|
|
MTCR : in STD_LOGIC;
|
|
OVR : out STD_LOGIC;
|
|
BERR : in STD_LOGIC;
|
|
MTACK : out STD_LOGIC;
|
|
DS0 : in STD_LOGIC;
|
|
DTACK : out STD_LOGIC;
|
|
UDS : in STD_LOGIC;
|
|
LDS : in STD_LOGIC;
|
|
AS : in STD_LOGIC;
|
|
RW : in STD_LOGIC;
|
|
Z3 : in STD_LOGIC;
|
|
DS1 : in STD_LOGIC;
|
|
FCS : in STD_LOGIC;
|
|
LAN_EN : out STD_LOGIC;
|
|
AUTOBOOT_OFF : in STD_LOGIC;
|
|
CP_RD : out STD_LOGIC;
|
|
CP_WE : out STD_LOGIC;
|
|
ROM_B : out STD_LOGIC_VECTOR (1 downto 0);
|
|
ROM_OE : out STD_LOGIC;
|
|
CP_CS : out STD_LOGIC;
|
|
IDE_WAIT : in STD_LOGIC;
|
|
INT_OUT : out STD_LOGIC;
|
|
CP_IRQ : in STD_LOGIC;
|
|
CLK_EXT : in STD_LOGIC;
|
|
IDE_W : out STD_LOGIC;
|
|
IDE_R : out STD_LOGIC;
|
|
IDE_A : out STD_LOGIC_VECTOR (2 downto 0);
|
|
IDE_CS : out STD_LOGIC_VECTOR (1 downto 0);
|
|
LAN_CFG : out STD_LOGIC_VECTOR (4 downto 1);
|
|
RESET : in STD_LOGIC;
|
|
LAN_RD : out STD_LOGIC;
|
|
LAN_CS : out STD_LOGIC;
|
|
LAN_WRH : out STD_LOGIC;
|
|
LAN_INT : in STD_LOGIC);
|
|
end LAN_IDE_CP;
|
|
|
|
architecture Behavioral of LAN_IDE_CP is
|
|
|
|
SIGNAL ide: STD_LOGIC:= '0';
|
|
SIGNAL autoconfig: STD_LOGIC:= '0';
|
|
SIGNAL AUTOCONFIG_IN_PROGRESS: STD_LOGIC:= '0';
|
|
signal Dout1:STD_LOGIC_VECTOR(3 downto 0);
|
|
signal AUTO_CONFIG_DONE:STD_LOGIC_VECTOR(2 downto 0);
|
|
signal AUTO_CONFIG_DONE_CYCLE:STD_LOGIC_VECTOR(2 downto 0);
|
|
signal SHUT_UP:STD_LOGIC_VECTOR(2 downto 0);
|
|
signal IDE_BASEADR:STD_LOGIC_VECTOR(7 downto 0);
|
|
signal LAN_BASEADR:STD_LOGIC_VECTOR(7 downto 0);
|
|
signal CP_BASEADR:STD_LOGIC_VECTOR(7 downto 0);
|
|
signal IDE_ENABLE:STD_LOGIC:= '0';
|
|
signal ROM_OE_S:STD_LOGIC:= '1';
|
|
signal IDE_R_S:STD_LOGIC:= '1';
|
|
signal IDE_W_S:STD_LOGIC:= '1';
|
|
signal DTACK_S:STD_LOGIC:= '1';
|
|
signal AS_D: std_logic:= '1';
|
|
signal AMIGA_CLK: std_logic:= '1';
|
|
|
|
Function to_std_logic(X: in Boolean) return Std_Logic is
|
|
variable ret : std_logic;
|
|
begin
|
|
if x then ret := '1'; else ret := '0'; end if;
|
|
return ret;
|
|
end to_std_logic;
|
|
|
|
begin
|
|
|
|
AMIGA_CLK <= not (C1 xor C3);
|
|
|
|
ADDRESS_DECODE: process(AMIGA_CLK)
|
|
begin
|
|
if(rising_edge(AMIGA_CLK))then
|
|
if(AS='0')then
|
|
AUTOCONFIG_IN_PROGRESS<= autoconfig;
|
|
else
|
|
AUTOCONFIG_IN_PROGRESS<= '0';
|
|
end if;
|
|
|
|
if(BERR='1') then
|
|
if(A(23 downto 16) = x"E8" and not(AUTO_CONFIG_DONE ="111"))then
|
|
autoconfig <='1';
|
|
else
|
|
autoconfig <='0';
|
|
end if;
|
|
|
|
if(A(23 downto 16) = IDE_BASEADR and SHUT_UP(1) = '0')then
|
|
ide <='1';
|
|
else
|
|
ide <='0';
|
|
end if;
|
|
else
|
|
autoconfig <='0';
|
|
ide <='0';
|
|
end if;
|
|
end if;
|
|
end process ADDRESS_DECODE;
|
|
|
|
--ide
|
|
-- this is the clocked process
|
|
ide_rw_gen: process (AMIGA_CLK)
|
|
begin
|
|
|
|
if rising_edge(AMIGA_CLK) then
|
|
if (reset = '0') then
|
|
IDE_R_S <= '1';
|
|
IDE_W_S <= '1';
|
|
ROM_OE_S <= '1';
|
|
IDE_ENABLE <= '1';
|
|
elsif(AS='0' and ide='1')then
|
|
if(RW='0')then
|
|
--the write goes to the hdd!
|
|
IDE_ENABLE <= '0'; -- enable IDE on first read
|
|
IDE_W_S <= '0';
|
|
IDE_R_S <= '1';
|
|
ROM_OE_S <= '1';
|
|
else
|
|
IDE_W_S <= '1';
|
|
IDE_R_S <= IDE_ENABLE; --read from IDE instead from ROM
|
|
ROM_OE_S <= not IDE_ENABLE;
|
|
end if;
|
|
else
|
|
IDE_R_S <= '1';
|
|
IDE_W_S <= '1';
|
|
ROM_OE_S <= '1';
|
|
end if;
|
|
|
|
end if;
|
|
end process ide_rw_gen;
|
|
|
|
|
|
--autoconfig
|
|
|
|
autoconfig_done: process (reset, AS)
|
|
begin
|
|
if reset = '0' then
|
|
-- reset active ...
|
|
AUTO_CONFIG_DONE <="000";
|
|
elsif rising_edge(AS) then -- no reset, so wait for rising edge of the nAS
|
|
AUTO_CONFIG_DONE <= AUTO_CONFIG_DONE_CYCLE;
|
|
end if;
|
|
end process autoconfig_done;
|
|
|
|
|
|
autoconfig_proc: process (reset, AMIGA_CLK)
|
|
begin
|
|
if rising_edge(AMIGA_CLK) then -- no reset, so wait for rising edge of the clock
|
|
if reset = '0' then
|
|
-- reset active ...
|
|
AUTO_CONFIG_DONE_CYCLE <="000";
|
|
Dout1<="1111";
|
|
--Dout2<="1111";
|
|
SHUT_UP <="111";
|
|
IDE_BASEADR<=x"FF";
|
|
LAN_BASEADR<=x"FF";
|
|
CP_BASEADR<=x"FF";
|
|
elsif(autoconfig= '1' and AS='0') then
|
|
if(RW='1') then
|
|
if(AUTO_CONFIG_DONE(0)='0')then
|
|
case A(6 downto 1) is
|
|
when "000000" =>
|
|
Dout1 <= "1100" ; --ZII, System-Memory, no ROM
|
|
when "000001" => Dout1 <= "0001" ; --one Card, 64KB =001
|
|
when "000010" => Dout1 <= "1000" ; --ProductID high nibble : E->0001
|
|
when "000011" => Dout1 <= "0100" ; --ProductID low nibble: F->0000
|
|
--when "0001000" => Dout1 <= "1111" ; --Config HIGH: 0x20 and no shut down
|
|
--when "0001010" => Dout1 <= "1111" ; --Config LOW
|
|
--when "0010000" => Dout1 <= "1111" ; --Ventor ID 0
|
|
when "001001" => Dout1 <= "0101" ; --Ventor ID 1
|
|
when "001010" => Dout1 <= "1110" ; --Ventor ID 2
|
|
when "001011" => Dout1 <= "0011" ; --Ventor ID 3 : $0A1C: A1K.org
|
|
--when "0011000" => Dout1 <= "1111" ; --Serial byte 0 (msb) high nibble
|
|
--when "0011010" => Dout1 <= "1111" ; --Serial byte 0 (msb) low nibble
|
|
--when "0011100" => Dout1 <= "1111" ; --Serial byte 1 high nibble
|
|
--when "0011110" => Dout1 <= "1111" ; --Serial byte 1 low nibble
|
|
--when "0100000" => Dout1 <= "1111" ; --Serial byte 2 high nibble
|
|
--when "0100010" => Dout1 <= "1111" ; --Serial byte 2 low nibble
|
|
--when "0100100" => Dout1 <= "1111" ; --Serial byte 3 (lsb) high nibble
|
|
--when "010001" => Dout1 <= "1000" ; --Serial byte 2 low nibble
|
|
when "010011" => Dout1 <= "1110" ; --Serial byte 3 (lsb) low nibble
|
|
when "100000" => Dout1 <= "0000" ; --Interrupt config: all zero
|
|
when "100001" => Dout1 <= "0000" ; --Interrupt config: all zero
|
|
when others => Dout1 <= "1111" ;
|
|
end case;
|
|
elsif(AUTO_CONFIG_DONE(1)='0')then
|
|
case A(6 downto 1) is
|
|
when "000000" =>
|
|
if(AUTOBOOT_OFF ='0') then
|
|
Dout1 <= "1101" ; --ZII, no System-Memory, ROM
|
|
else
|
|
Dout1 <= "1100" ; --ZII, no System-Memory, no ROM
|
|
end if;
|
|
when "000001" => Dout1 <= "0001" ; --one Card, 64kb = 001
|
|
--when "0000100" => Dout2 <= "1111" ; --ProductID high nibble : F->0000=0
|
|
when "000011" => Dout1 <= "1001" ; --ProductID low nibble: 9->0110=6
|
|
--when "0001000" => Dout <= "1111" ; --Config HIGH: 0x20 and no shut down
|
|
--when "0001010" => Dout2 <= "1111" ; --Config LOW
|
|
--when "0010000" => Dout2 <= "1111" ; --Ventor ID 0
|
|
when "001001" => Dout1 <= "0111" ; --Ventor ID 1
|
|
when "001010" => Dout1 <= "1101" ; --Ventor ID 2
|
|
when "001011" => Dout1 <= "0011" ; --Ventor ID 3 : $082C: BSC
|
|
when "001100" => Dout1 <= "0100" ; --Serial byte 0 (msb) high nibble
|
|
when "001101" => Dout1 <= "1110" ; --Serial byte 0 (msb) low nibble
|
|
when "001110" => Dout1 <= "1001" ; --Serial byte 1 high nibble
|
|
when "001111" => Dout1 <= "0100" ; --Serial byte 1 low nibble
|
|
--when "0100000" => Dout2 <= "1111" ; --Serial byte 2 high nibble
|
|
--when "0100010" => Dout2 <= "1111" ; --Serial byte 2 low nibble
|
|
when "010010" => Dout1 <= "0100" ; --Serial byte 3 (lsb) high nibble
|
|
when "010011" => Dout1 <= "1010" ; --Serial byte 3 (lsb) low nibble: B16B00B5
|
|
--when "0101000" => Dout2 <= "1111" ; --Rom vector high byte high nibble
|
|
--when "0101010" => Dout2 <= "1111" ; --Rom vector high byte low nibble
|
|
--when "0101100" => Dout2 <= "1111" ; --Rom vector low byte high nibble
|
|
when "010111" => Dout1 <= "1110" ; --Rom vector low byte low nibble
|
|
when "100000" => Dout1 <= "0000" ; --Interrupt config: all zero
|
|
when "100001" => Dout1 <= "0000" ; --Interrupt config: all zero
|
|
when others => Dout1 <= "1111" ;
|
|
end case;
|
|
elsif(AUTO_CONFIG_DONE(2)='0')then
|
|
case A(6 downto 1) is
|
|
when "000000" =>
|
|
Dout1 <= "1100" ; --ZII, System-Memory, no ROM
|
|
when "000001" => Dout1 <= "0001" ; --one Card, 64KB =001
|
|
when "000010" => Dout1 <= "1000" ; --ProductID high nibble : E->0001
|
|
when "000011" => Dout1 <= "0011" ; --ProductID low nibble: F->0000
|
|
--when "0001000" => Dout1 <= "1111" ; --Config HIGH: 0x20 and no shut down
|
|
--when "0001010" => Dout1 <= "1111" ; --Config LOW
|
|
--when "0010000" => Dout1 <= "1111" ; --Ventor ID 0
|
|
when "001001" => Dout1 <= "0101" ; --Ventor ID 1
|
|
when "001010" => Dout1 <= "1110" ; --Ventor ID 2
|
|
when "001011" => Dout1 <= "0011" ; --Ventor ID 3 : $0A1C: A1K.org
|
|
--when "0011000" => Dout1 <= "1111" ; --Serial byte 0 (msb) high nibble
|
|
--when "0011010" => Dout1 <= "1111" ; --Serial byte 0 (msb) low nibble
|
|
--when "0011100" => Dout1 <= "1111" ; --Serial byte 1 high nibble
|
|
--when "0011110" => Dout1 <= "1111" ; --Serial byte 1 low nibble
|
|
--when "0100000" => Dout1 <= "1111" ; --Serial byte 2 high nibble
|
|
--when "0100010" => Dout1 <= "1111" ; --Serial byte 2 low nibble
|
|
--when "0100100" => Dout1 <= "1111" ; --Serial byte 3 (lsb) high nibble
|
|
--when "010001" => Dout1 <= "1000" ; --Serial byte 2 low nibble
|
|
when "010011" => Dout1 <= "1110" ; --Serial byte 3 (lsb) low nibble
|
|
when "100000" => Dout1 <= "0000" ; --Interrupt config: all zero
|
|
when "100001" => Dout1 <= "0000" ; --Interrupt config: all zero
|
|
when others => Dout1 <= "1111" ;
|
|
end case;
|
|
elsif(AUTO_CONFIG_DONE(1)='0')then
|
|
end if;
|
|
else --write
|
|
if( UDS='0' )then
|
|
if(AUTO_CONFIG_DONE(0)='0')then
|
|
if(A (6 downto 1)="100100")then
|
|
LAN_BASEADR(7 downto 0) <= D(15 downto 8); --Base adress
|
|
AUTO_CONFIG_DONE_CYCLE(0) <='1'; --done here
|
|
SHUT_UP(0) <='0'; --enable board
|
|
elsif(A (6 downto 1)="100110")then
|
|
AUTO_CONFIG_DONE_CYCLE(0) <='1'; --done here
|
|
end if;
|
|
elsif(AUTO_CONFIG_DONE(1)='0')then
|
|
-- if(AUTO_CONFIG_DONE(1)='0')then
|
|
if(A (6 downto 1)="100100")then
|
|
IDE_BASEADR(7 downto 0) <= D(15 downto 8); --Base adress
|
|
SHUT_UP(1) <= '0'; --enable board
|
|
AUTO_CONFIG_DONE_CYCLE(1) <='1'; --done here
|
|
elsif(A (6 downto 1)="100110")then
|
|
AUTO_CONFIG_DONE_CYCLE(1) <='1'; --done here
|
|
end if;
|
|
elsif(AUTO_CONFIG_DONE(2)='0')then
|
|
-- if(AUTO_CONFIG_DONE(1)='0')then
|
|
if(A (6 downto 1)="100100")then
|
|
CP_BASEADR(7 downto 0) <= D(15 downto 8); --Base adress
|
|
SHUT_UP(2) <= '0'; --enable board
|
|
AUTO_CONFIG_DONE_CYCLE(2) <='1'; --done here
|
|
elsif(A (6 downto 1)="100110")then
|
|
AUTO_CONFIG_DONE_CYCLE(2) <='1'; --done here
|
|
end if;
|
|
end if;
|
|
end if;
|
|
end if;
|
|
end if;
|
|
end if;
|
|
end process autoconfig_proc; --- that's all
|
|
|
|
|
|
|
|
--signal assignment
|
|
D <= --RAM_D when RW='1' and TRANSFER_IN_PROGRES ='1' else
|
|
Dout1 & "111111111111" when RW='1' and AUTOCONFIG_IN_PROGRESS ='1' else
|
|
"ZZZZZZZZZZZZZZZZ";
|
|
--
|
|
-- DRAM <= D when RW='0' and AS ='0' else
|
|
-- "ZZZZZZZZZZZZZZZZ";
|
|
|
|
IDE_W <= IDE_W_S;
|
|
IDE_R <= IDE_R_S;
|
|
IDE_CS(0)<= not(A(12));
|
|
IDE_CS(1)<= not(A(13));
|
|
IDE_A(0) <= A(9);
|
|
IDE_A(1) <= A(10);
|
|
IDE_A(2) <= A(11);
|
|
ROM_B <= "00";
|
|
ROM_OE <= ROM_OE_S;
|
|
|
|
|
|
-- DTACK <= DTACK_S when --TRANSFER_IN_PROGRES ='1' or
|
|
-- AUTOCONFIG_IN_PROGRES ='1'
|
|
-- else 'Z';
|
|
|
|
DTACK <= 'Z';
|
|
|
|
end Behavioral;
|
|
|