Revision 337
Added by markw over 10 years ago
| common/a8core/address_decoder.vhdl | ||
|---|---|---|
|
end generate;
|
||
|
|
||
|
gen_low_memory2 : if low_memory=2 generate
|
||
|
-- TODO, check we can use 320k extended RAM ok (NO)
|
||
|
-- TODO, check we can use 320k extended RAM ok (THINK SO)
|
||
|
|
||
|
-- SRAM memory map (512k) for Papilio duo
|
||
|
SDRAM_CART_ADDR <= "0000" & "1011" & emu_cart_address(14 downto 0);
|
||
|
SDRAM_BASIC_ROM_ADDR <= "0000" & "101" & "0000000000000000";
|
||
|
SDRAM_OS_ROM_ADDR <= "0000" & "101" & rom_select(1 downto 0) &"00000000000000";
|
||
|
SDRAM_CART_ADDR <= "0000" & "0"&emu_cart_address(15)&"11" & emu_cart_address(14 downto 0);
|
||
|
SDRAM_BASIC_ROM_ADDR <= "0000" & "001" & "0000000000000000";
|
||
|
SDRAM_OS_ROM_ADDR <= "0000" & "001" & rom_select(1 downto 0) &"00000000000000";
|
||
|
|
||
|
end generate;
|
||
|
|
||
The banks have a hole from 64k-256k, use this for the os rom, freeze and directory cache