Revision 444
Added by markw over 9 years ago
| ultimate_cart/veronica/atari_address_decoder.vhd | ||
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END atari_address_decoder;
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ARCHITECTURE vhdl OF atari_address_decoder IS
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signal addr_valid : std_logic;
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begin
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sram_address(16) <= '1';
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| ... | ... | |
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sram_address(12 downto 0) <= addr_in;
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sram_select <= bus_request and not(s4_n and s5_n);
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config_select <= bus_request and not(ctl_n) and or_reduce(addr_in(7 downto 6)¬(addr_in(5 downto 0)));
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addr_valid <= '1' when addr_in(7 downto 0)=x"c0" else '0';
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config_select <= bus_request and not(ctl_n) and addr_valid;
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end vhdl;
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Also available in: Unified diff
Fixed c0 decode and made more explicit