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Gehstock.Mist_FPGA/common/CPU/65C02/r65c02_tc.vhd
Marcel 6fe7618dcf add 65c02 CPU Core
2022-06-20 17:28:35 +02:00

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VHDL
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-- VHDL Entity r65c02_tc.r65c02_tc.symbol
--
-- Created:
-- by - remoteghost.UNKNOWN (ENTW-7HPZ200)
-- at - 10:24:26 07/21/13
--
-- Generated by Mentor Graphics' HDL Designer(TM) 2016.2 (Build 5)
--
LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE ieee.std_logic_arith.all;
entity r65c02_tc is
port(
clk_clk_i : in std_logic;
d_i : in std_logic_vector (7 downto 0);
irq_n_i : in std_logic;
nmi_n_i : in std_logic;
rdy_i : in std_logic;
rst_rst_n_i : in std_logic;
so_n_i : in std_logic;
ce : in std_logic;
a_o : out std_logic_vector (15 downto 0);
d_o : out std_logic_vector (7 downto 0);
rd_o : out std_logic;
sync_o : out std_logic;
wr_n_o : out std_logic;
wr_o : out std_logic
);
-- Declarations
end r65c02_tc ;
-- (C) 2008 - 2018 Jens Gutschmidt
-- (email: opencores@vivare-services.com)
--
-- Versions:
-- Revision 1.52 2018/09/10 12:14:00 jens
-- - RESET generates SYNC now, 1 dead cycle delayed
-- Revision 1.52 RC 2018/09/09 03:00:00 jens
-- - ADC / SBC flags and A like R65C02 now
-- Revision 1.52 BETA 2018/09/05 19:35:00 jens
-- - BBRx/BBSx internal cycles like real 65C02 now
-- - Bug Fix ADC and SBC in decimal mode (all op codes -
-- 1 cycle is missing
-- - Bug Fix ADC and SBC in decimal mode (all op codes -
-- "Overflow" flag was computed wrong)
-- Revision 1.52 BETA 2018/09/02 18:49:00 jens
-- - Interrupt NMI and IRQ processing via FETCH stage now
-- Revision 1.52 BETA 2018/08/30 15:39:00 jens
-- - Interrupt priority order is now: BRQ - NMI - IRQ
-- - Performance improvements on-going (Mealy -> Moore)
-- Revision 1.52 BETA 2018/08/23 20:27:00 jens
-- - Bug Fixes All Branch Instructions
-- (BCC, BCS, BEQ, BNE, BPL, BMI, BVC, BVS, BRA)
-- 3 cycles now if branch forward occur and the branch
-- instruction lies on a xxFEh location.
-- (BBR, BBS) 6 cycles now if branch forward occur and the
-- branch instruction lies on a xxFDh location.
-- - Bug Fix Hardware Interrupts NMI & IRQ - 7 cycles & "SYNC" now
-- - Bug Fix Now all cycles are delayable (WR and internal)
--
-- Revision 1.51 RC 2014/04/19 14:44:00 jens
-- (never submitted to opencores)
-- - Bug Fix JMP ABS - produced a 6502 like JMP (IND) PCH.
-- When the ABS address data bytes cross the page
-- boundary (e.g. $02FE JMP hhll reads hh from
-- $02FF and ll from $0200, instead $02FF and $0300)
--
-- Revision 1.5 RC 2013/08/01 11:00:00 jens
-- - Change Block name to lower case
-- - Bug Fix CMP (IND) - wrongly decoded as function AND
-- - Bug Fix BRK should clear decimal flag in P Reg
-- - Bug Fix JMP (ABS,X) - Low Address outputted twice - no High Address
-- - Bug Fix Unknown Ops - Used always 1b2c NOP ($EA) - new NOPs created
-- - Bug Fix DECIMAL ADC and SBC (all op codes - "C" flag was computed wrong)
-- - Bug Fix INC/DEC ABS,X - N/Z flag wrongly computed
-- - Bug Fix RTI - should increment stack pointer
-- - Bug Fix "E" & "B" flags (Bits 5 & 4) - should be always "1" in P Reg. Change "RES", "RTI", "IRQ" & "NMI" substates.
-- - Bug Fix ADC and SBC (all sub codes - "Overflow" flag was computed wrong)
-- - Bug Fix RMB, SMB Bug - Bit position decoded wrong
--
-- Revision 1.4 2013/07/21 11:11:00 jens
-- - Changing the title block and internal revision history
-- - Bug Fix STA [(IND)] op$92 ($92 was missed in the connection list at state FETCH)
--
-- Revision 1.3 2009/01/04 10:20:50 eda
-- Changes for cosmetic issues only
--
-- Revision 1.2 2009/01/04 09:23:12 eda
-- - Delete unused nets and blocks (same as R6502_TC)
-- - Rename blocks
-- - Re-arrage FSM symbols in block FSM_Execution_Unit
--
-- Revision 1.1 2009/01/03 16:36:48 eda
-- -- no description --
--
--
--
-- VHDL Architecture r65c02_tc.r65c02_tc.struct
--
-- Created:
-- by - eda.UNKNOWN (ENTW-7HPZ200)
-- at - 12:21:16 10.09.2018
--
-- Generated by Mentor Graphics' HDL Designer(TM) 2016.2 (Build 5)
--
-- COPYRIGHT (C) 2008 - 2018 by Jens Gutschmidt
--
-- This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version.
--
-- This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
--
--
LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE ieee.std_logic_arith.all;
library r65c02_tc;
architecture struct of r65c02_tc is
-- Architecture declarations
-- Internal signal declarations
-- Component Declarations
component core
port (
clk_clk_i : in std_logic ;
d_i : in std_logic_vector (7 downto 0);
irq_n_i : in std_logic ;
nmi_n_i : in std_logic ;
rdy_i : in std_logic ;
rst_rst_n_i : in std_logic ;
so_n_i : in std_logic ;
ce : in std_logic ;
a_o : out std_logic_vector (15 downto 0);
d_o : out std_logic_vector (7 downto 0);
rd_o : out std_logic ;
sync_o : out std_logic ;
wr_n_o : out std_logic ;
wr_o : out std_logic
);
end component;
-- Optional embedded configurations
-- pragma synthesis_off
for all : core use entity r65c02_tc.core;
-- pragma synthesis_on
begin
-- Instance port mappings.
U_0 : core
port map (
clk_clk_i => clk_clk_i,
d_i => d_i,
irq_n_i => irq_n_i,
nmi_n_i => nmi_n_i,
rdy_i => rdy_i,
rst_rst_n_i => rst_rst_n_i,
so_n_i => so_n_i,
ce => ce,
a_o => a_o,
d_o => d_o,
rd_o => rd_o,
sync_o => sync_o,
wr_n_o => wr_n_o,
wr_o => wr_o
);
end struct;
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