| Line 2... |
Line 2... |
--
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--
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-- The Opcode Decoder Table.
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-- The Opcode Decoder Table.
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-- Decodes the given opcode to instruction mnemonics.
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-- Decodes the given opcode to instruction mnemonics.
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-- Also derives the multicycle information.
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-- Also derives the multicycle information.
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--
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--
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-- $Id: opc_table.vhd,v 1.1 2004-03-23 21:31:52 arniml Exp $
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-- $Id: opc_table.vhd,v 1.2 2004-03-28 13:10:48 arniml Exp $
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--
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--
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-- All rights reserved
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-- All rights reserved
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--
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--
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-- Redistribution and use in source and synthezised forms, with or without
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-- Redistribution and use in source and synthezised forms, with or without
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-- modification, are permitted provided that the following conditions are met:
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-- modification, are permitted provided that the following conditions are met:
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| Line 109... |
Line 109... |
when "10011000" | -- ANL BUS, data
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when "10011000" | -- ANL BUS, data
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"10011001" | "10011010" => -- ANL PP, data
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"10011001" | "10011010" => -- ANL PP, data
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mnemonic_o <= MN_ANL_EXT;
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mnemonic_o <= MN_ANL_EXT;
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multi_cycle_o <= '1';
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multi_cycle_o <= '1';
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-- Mnemonic ANLD --------------------------------------------------------
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when "10011100" | "10011101" | "10011110" | "10011111" => -- ANLD PP, A
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mnemonic_o <= MN_ANLD;
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multi_cycle_o <= '1';
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-- Mnemonic CALL --------------------------------------------------------
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-- Mnemonic CALL --------------------------------------------------------
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when "00010100" | "00110100" | "01010100" | "01110100" | -- CALL addr
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when "00010100" | "00110100" | "01010100" | "01110100" | -- CALL addr
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"10010100" | "10110100" | "11010100" | "11110100" => --
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"10010100" | "10110100" | "11010100" | "11110100" => --
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mnemonic_o <= MN_CALL;
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mnemonic_o <= MN_CALL;
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multi_cycle_o <= '1';
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multi_cycle_o <= '1';
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| Line 283... |
Line 278... |
-- Mnemonic MOV_T -------------------------------------------------------
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-- Mnemonic MOV_T -------------------------------------------------------
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when "01100010" | -- MOV T, A
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when "01100010" | -- MOV T, A
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"01000010" => -- MOV A, T
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"01000010" => -- MOV A, T
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mnemonic_o <= MN_MOV_T;
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mnemonic_o <= MN_MOV_T;
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-- Mnemonic MOV_A_PP ----------------------------------------------------
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-- Mnemonic MOVD_A_PP ---------------------------------------------------
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when "00001100" | "00001101" | "00001110" | "00001111" => -- MOV A, Pp
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when "00001100" | "00001101" | "00001110" | "00001111" => -- MOVD A, Pp
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mnemonic_o <= MN_MOV_A_PP;
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mnemonic_o <= MN_MOVD_A_PP;
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multi_cycle_o <= '1';
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-- Mnemonic MOV_PP_A ----------------------------------------------------
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when "00111100" | "00111101" | "00111110" | "00111111" => -- MOV Pp, A
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mnemonic_o <= MN_MOV_PP_A;
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multi_cycle_o <= '1';
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multi_cycle_o <= '1';
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-- Mnemonic MOVP --------------------------------------------------------
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-- Mnemonic MOVP --------------------------------------------------------
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when "10100011" | -- MOVP A, @ A
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when "10100011" | -- MOVP A, @ A
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"11100011" => -- MOVP3 A, @ A
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"11100011" => -- MOVP3 A, @ A
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| Line 326... |
Line 316... |
when "10001000" | -- ORL BUS, data
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when "10001000" | -- ORL BUS, data
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"10001001" | "10001010" => -- ORL Pp, data
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"10001001" | "10001010" => -- ORL Pp, data
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mnemonic_o <= MN_ORL_EXT;
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mnemonic_o <= MN_ORL_EXT;
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multi_cycle_o <= '1';
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multi_cycle_o <= '1';
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-- Mnemonic ORLD_PP_A ----------------------------------------------------
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-- Mnemonic OUTD_PP_A ---------------------------------------------------
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when "10001100" | "10001101" | "10001110" | "10001111" => -- ORLD Pp, A
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when "00111100" | "00111101" | "00111110" | "00111111" | -- MOVD Pp, A
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mnemonic_o <= MN_ORLD_PP_A;
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"10011100" | "10011101" | "10011110" | "10011111" | -- ANLD PP, A
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"10001100" | "10001101" | "10001110" | "10001111" => -- ORLD Pp, A
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mnemonic_o <= MN_OUTD_PP_A;
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multi_cycle_o <= '1';
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multi_cycle_o <= '1';
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-- Mnemonic OUTL_EXT ----------------------------------------------------
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-- Mnemonic OUTL_EXT ----------------------------------------------------
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when "00111001" | "00111010" | -- OUTL Pp, A
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when "00111001" | "00111010" | -- OUTL Pp, A
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"00000010" => -- OUTL BUS, A
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"00000010" => -- OUTL BUS, A
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| Line 414... |
Line 406... |
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- File History:
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-- File History:
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--
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--
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-- $Log: not supported by cvs2svn $
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-- $Log: not supported by cvs2svn $
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-- Revision 1.1 2004/03/23 21:31:52 arniml
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-- initial check-in
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--
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--
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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No newline at end of file
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No newline at end of file
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