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use constant values for ioctl_index

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This commit is contained in:
Antonino Porcino
2019-04-15 14:40:14 +02:00
parent ce921e0840
commit 4bb1c04caa
1 changed files with 19 additions and 12 deletions
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31
cores/c64/rtl/mist/c64_mist.vhd
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@@ -207,6 +207,13 @@ component user_io generic(STRLEN : integer := 0 ); port
);
end component user_io;
-- constants for ioctl_index
constant FILE_BOOT : std_logic_vector(7 downto 0) := x"00"; -- ROM files sent at boot time
constant FILE_PRG : std_logic_vector(7 downto 0) := x"02";
constant FILE_TAP : std_logic_vector(7 downto 0) := x"42";
constant FILE_CRT : std_logic_vector(7 downto 0) := x"82";
constant FILE_ROM : std_logic_vector(7 downto 0) := x"03";
component data_io port
(
clk_sys : in std_logic;
@@ -624,7 +631,7 @@ begin
ioctl_dout => ioctl_data
);
cart_loading <= '1' when ioctl_download = '1' and ioctl_index = x"82" else '0';
cart_loading <= '1' when ioctl_download = '1' and ioctl_index = FILE_CRT else '0';
cart : cartridge
port map (
@@ -714,7 +721,7 @@ begin
end if;
if ioctl_wr='1' then
if ioctl_index = x"02" then--prg
if ioctl_index = FILE_PRG then
if ioctl_addr = 0 then
ioctl_load_addr(7 downto 0) <= ioctl_data;
elsif(ioctl_addr = 1) then
@@ -724,7 +731,7 @@ begin
end if;
end if;
if ioctl_index = x"82" then--CRT, e0(MAX)
if ioctl_index = FILE_CRT then -- e0(MAX)
if ioctl_addr = 0 then
ioctl_load_addr <= '0' & X"100000";
cart_blk_len <= (others => '0');
@@ -766,7 +773,7 @@ begin
end if;
end if;
if ioctl_index = x"42" then -- TAP
if ioctl_index = FILE_TAP then
if ioctl_addr = 0 then
ioctl_load_addr <= '0' & X"200000";
ioctl_ram_data <= ioctl_data;
@@ -776,7 +783,7 @@ begin
end if;
if old_download /= ioctl_download and ioctl_index = x"82" then
if old_download /= ioctl_download and ioctl_index = FILE_CRT then
cart_attached <= old_download;
erase_cram <= '1';
end if;
@@ -804,9 +811,9 @@ begin
end if;
end process;
c64rom_wr <= ioctl_wr when (((ioctl_index = 0) and (ioctl_addr(14) = '0')) or (ioctl_index = 3)) and (ioctl_download = '1') else '0';
c64rom_addr <= ioctl_addr(13 downto 0) when ioctl_index = 0 else '1' & ioctl_addr(12 downto 0);
c1541rom_wr <= ioctl_wr when (ioctl_index = 0) and (ioctl_addr(14) = '1') and (ioctl_download = '1') else '0';
c64rom_wr <= ioctl_wr when (((ioctl_index = FILE_BOOT) and (ioctl_addr(14) = '0')) or (ioctl_index = FILE_ROM)) and (ioctl_download = '1') else '0';
c64rom_addr <= ioctl_addr(13 downto 0) when ioctl_index = FILE_BOOT else '1' & ioctl_addr(12 downto 0);
c1541rom_wr <= ioctl_wr when (ioctl_index = FILE_BOOT) and (ioctl_addr(14) = '1') and (ioctl_download = '1') else '0';
process(clk_c64)
begin
@@ -941,7 +948,7 @@ begin
reset_counter <= 1000000;
reset_n <= '0';
elsif buttons(1)='1' or st_detach_cartdrige='1' or reset_key = '1' or reset_crt='1' or
(ioctl_download='1' and (ioctl_index = 3 or ioctl_index = x"82")) then -- kernal or crt
(ioctl_download='1' and (ioctl_index = FILE_ROM or ioctl_index = FILE_CRT)) then
reset_counter <= 255;
reset_n <= '0';
elsif ioctl_download ='1' then
@@ -1214,8 +1221,8 @@ begin
-- TAP playback controller
cass_sense <= not tap_play;
tap_play_btn <= st_tap_play_btn;
tap_play_btn <= st_tap_play_btn;
process(clk_c64, reset_n)
begin
if reset_n = '0' then
@@ -1226,7 +1233,7 @@ begin
tap_mem_ce <= '0';
elsif rising_edge(clk_c64) then
tap_reset <= '0';
if ioctl_download = '1' and ioctl_index = x"42" then
if ioctl_download = '1' and ioctl_index = FILE_TAP then
tap_play <= '0';
tap_play_addr <= '0' & X"200000";
tap_last_addr <= ioctl_load_addr;