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Code Issues Releases Wiki Activity

use constant values for sdram adresses

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This commit is contained in:
Antonino Porcino
2019-04-15 14:40:43 +02:00
parent 4bb1c04caa
commit 45bf18ce12
1 changed files with 11 additions and 5 deletions
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16
cores/c64/rtl/mist/c64_mist.vhd
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@@ -549,6 +549,12 @@ end component cartridge;
signal force_erase : std_logic;
signal erase_to : std_logic_vector(4 downto 0) := (others => '0');
signal mem_ce : std_logic;
-- sdram layout
constant C64_MEM_START : std_logic_vector(24 downto 0) := '0' & X"000000"; -- normal C64 RAM
constant CRT_MEM_START : std_logic_vector(24 downto 0) := '0' & X"100000"; -- cartdriges
constant TAP_MEM_START : std_logic_vector(24 downto 0) := '0' & X"200000"; -- .tap files
begin
-- 1541/tape activity led
@@ -733,7 +739,7 @@ begin
if ioctl_index = FILE_CRT then -- e0(MAX)
if ioctl_addr = 0 then
ioctl_load_addr <= '0' & X"100000";
ioctl_load_addr <= CRT_MEM_START;
cart_blk_len <= (others => '0');
cart_hdr_cnt <= (others => '0');
end if;
@@ -775,7 +781,7 @@ begin
if ioctl_index = FILE_TAP then
if ioctl_addr = 0 then
ioctl_load_addr <= '0' & X"200000";
ioctl_load_addr <= TAP_MEM_START;
ioctl_ram_data <= ioctl_data;
end if;
ioctl_ram_wr <= '1';
@@ -1226,8 +1232,8 @@ begin
process(clk_c64, reset_n)
begin
if reset_n = '0' then
tap_play_addr <= '0' & X"200000";
tap_last_addr <= '0' & X"200000";
tap_play_addr <= TAP_MEM_START;
tap_last_addr <= TAP_MEM_START;
tap_play <= '0';
tap_reset <= '1';
tap_mem_ce <= '0';
@@ -1235,7 +1241,7 @@ begin
tap_reset <= '0';
if ioctl_download = '1' and ioctl_index = FILE_TAP then
tap_play <= '0';
tap_play_addr <= '0' & X"200000";
tap_play_addr <= TAP_MEM_START;
tap_last_addr <= ioctl_load_addr;
tap_reset <= '1';
if ioctl_addr = x"00000C" and ioctl_wr = '1' then