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Line 1... |
-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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--
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--
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-- The Decoder unit.
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-- The Decoder unit.
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-- It decodes the instruction opcodes and executes them.
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-- It decodes the instruction opcodes and executes them.
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--
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--
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-- $Id: decoder.vhd,v 1.14 2004-06-30 21:18:28 arniml Exp $
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-- $Id: decoder.vhd,v 1.15 2004-09-12 00:35:44 arniml Exp $
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--
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--
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-- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org)
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-- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org)
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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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| Line 359... |
Line 359... |
pm_write_pmem_addr_s <= true;
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pm_write_pmem_addr_s <= true;
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end if;
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end if;
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when MSTATE4 =>
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when MSTATE4 =>
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if ea_i = '1' and
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if ea_i = '1' and
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(need_address_v or last_cycle_s) then
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((not clk_second_cycle_i and assert_psen_s)
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or last_cycle_s) then
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clk_assert_psen_o <= true;
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clk_assert_psen_o <= true;
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p2_output_pch_o <= true;
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p2_output_pch_o <= true;
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bus_output_pcl_o <= true;
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bus_output_pcl_o <= true;
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end if;
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end if;
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| Line 1944... |
Line 1945... |
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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 1.14 2004/06/30 21:18:28 arniml
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-- Fix bug report:
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-- "Program Memory bank can be switched during interrupt"
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-- int module emits int_in_progress signal that is used inside the decoder
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-- to hold mb low for JMP and CALL during interrupts
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--
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-- Revision 1.13 2004/05/20 21:51:40 arniml
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-- Revision 1.13 2004/05/20 21:51:40 arniml
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-- clean-up use of ea_i
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-- clean-up use of ea_i
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--
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--
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-- Revision 1.12 2004/05/17 14:40:09 arniml
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-- Revision 1.12 2004/05/17 14:40:09 arniml
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-- assert p2_read_p2_o when expander port is read
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-- assert p2_read_p2_o when expander port is read
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