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