Revision 74
Added by markw over 11 years ago
| common/zpu/zpu_glue.vhdl | ||
|---|---|---|
|
-- stack request
|
||
|
ZPU_STACK_WRITE : out std_logic_vector(3 downto 0);
|
||
|
|
||
|
-- write to ROM!!
|
||
|
ZPU_ROM_WREN : out std_logic;
|
||
|
|
||
|
-- response
|
||
|
MEMORY_READY : in std_logic
|
||
|
);
|
||
| ... | ... | |
|
result_next <= result_reg;
|
||
|
memory_ready_next <= memory_ready;
|
||
|
zpu_stACK_WRITE <= (others=>'0');
|
||
|
ZPU_ROM_WREN <= '0';
|
||
|
ZPU_config_write <= '0';
|
||
|
zpu_addr_next <= zpu_addr_reg;
|
||
|
zpu_do_next <= zpu_do_reg;
|
||
| ... | ... | |
|
else
|
||
|
result_next <= result_rom;
|
||
|
end if;
|
||
|
ZPU_ROM_WREN <= ZPU_WRITE_TEMP;
|
||
|
ZPU_MEM_BUSY <= '1';
|
||
|
zpu_addr_next <= std_logic_vector(zpu_addr_unsigned);
|
||
|
when "01110" =>
|
||
| common/zpu/zpucore.vhd | ||
|---|---|---|
|
-- data on next cycle after addr
|
||
|
ZPU_ADDR_ROM : out std_logic_vector(15 downto 0);
|
||
|
ZPU_ROM_DATA : in std_logic_vector(31 downto 0);
|
||
|
ZPU_ROM_WREN : out std_logic;
|
||
|
|
||
|
-- spi master
|
||
|
-- Too painful to bit bang spi from zpu, so we have a hardware master in here
|
||
| ... | ... | |
|
ZPU_ADDR_FETCH => ZPU_ADDR_FETCH,
|
||
|
ZPU_ADDR_ROM_RAM => ZPU_ADDR_ROM_RAM,
|
||
|
ZPU_DO => ZPU_DO,
|
||
|
ZPU_STACK_WRITE => ZPU_STACK_WRITE);
|
||
|
ZPU_STACK_WRITE => ZPU_STACK_WRITE,
|
||
|
ZPU_ROM_WREN => ZPU_ROM_WREN);
|
||
|
|
||
|
config_regs : entity work.zpu_config_regs
|
||
|
GENERIC MAP (
|
||
Added 32-byte write support to ROM area! For MIST external sector buffer. TODO: Smarter method...