| Line 75... |
Line 75... |
constant EXT_GP7 : integer := 4;
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constant EXT_GP7 : integer := 4;
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|
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constant OPEN8_NULLBUS : DATA_TYPE := x"00";
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constant OPEN8_NULLBUS : DATA_TYPE := x"00";
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type OPEN8_BUS_TYPE is record
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type OPEN8_BUS_TYPE is record
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Clock : std_logic;
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Reset : std_logic;
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uSec_Tick : std_logic;
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Address : ADDRESS_TYPE;
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Address : ADDRESS_TYPE;
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Wr_En : std_logic;
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Wr_En : std_logic;
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Wr_Data : DATA_TYPE;
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Wr_Data : DATA_TYPE;
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Rd_En : std_logic;
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Rd_En : std_logic;
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GP_Flags : EXT_GP_FLAGS;
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end record;
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end record;
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constant Reset_Level : std_logic := '1';
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-- Component declaration
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-- Component declaration
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-- (assumes a 1K RAM at 0x0000 and ROM at the top of the memory map)
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-- (assumes a 1K RAM at 0x0000 and ROM at the top of the memory map)
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component o8_cpu is
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component o8_cpu is
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generic(
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generic(
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Program_Start_Addr : ADDRESS_TYPE := x"8000";
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Program_Start_Addr : ADDRESS_TYPE := x"8000";
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| Line 95... |
Line 101... |
Enable_Auto_Increment : boolean := false;
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Enable_Auto_Increment : boolean := false;
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BRK_Implements_WAI : boolean := false;
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BRK_Implements_WAI : boolean := false;
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Enable_NMI : boolean := true;
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Enable_NMI : boolean := true;
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RTI_Ignores_GP_Flags : boolean := false;
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RTI_Ignores_GP_Flags : boolean := false;
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Default_Interrupt_Mask : DATA_TYPE := x"FF";
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Default_Interrupt_Mask : DATA_TYPE := x"FF";
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Reset_Level : std_logic := '0' );
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Clock_Frequency : real
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);
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port(
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port(
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Clock : in std_logic;
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Clock : in std_logic;
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Reset : in std_logic;
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PLL_Locked : in std_logic;
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CPU_Halt : in std_logic;
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CPU_Halt : in std_logic := '0';
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GP_Flags : out EXT_GP_FLAGS;
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Open8_Bus : out OPEN8_BUS_TYPE;
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Open8_Bus : out OPEN8_BUS_TYPE;
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Rd_Data : in DATA_TYPE;
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Rd_Data : in DATA_TYPE;
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Interrupts : in INTERRUPT_BUNDLE
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Interrupts : in INTERRUPT_BUNDLE := x"00"
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);
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);
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end component;
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end component;
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|
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-- This function is used to calculate RAM parameters, but is generally
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-- This function is used to calculate RAM parameters, but is generally
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-- useful for making things more generic.
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-- useful for making things more generic.
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