68 lines
2.4 KiB
Verilog
68 lines
2.4 KiB
Verilog
/* proc_state_def.v - Definitions of the states in the main state machine
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of the 9086 CPU.
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This file is part of the 9086 project.
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Copyright (c) 2023 Efthymios Kritikos
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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`define PROC_STATE_BITS 6
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`define PROC_HALT_STATE 6'b000000
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/*INSTRUCTION FETCH STATE*/
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`define PROC_IF_STATE_ENTRY 6'b000001
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`define PROC_IF_WRITE_CIR 6'b000010
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`define PROC_IF_STATE_EXTRA_FETCH_SET 6'b000011
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`define PROC_IF_STATE_EXTRA_FETCH 6'b000100
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/*DECODE SATE*/
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`define PROC_DE_STATE_ENTRY 6'b001000
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`define PROC_DE_LOAD_16_PARAM 6'b001001
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`define PROC_DE_LOAD_16_EXTRA_FETCH_SET 6'b001010
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`define PROC_DE_LOAD_16_EXTRA_FETCH 6'b001011
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`define PROC_DE_LOAD_REG_TO_PARAM 6'b001100
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/*MEM/IO READ*/
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`define PROC_MEMIO_READ 6'b010000
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`define PROC_MEMIO_READ_SETADDR 6'b010001
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`define PROC_MEMIO_GET_ALIGNED_DATA 6'b010010 /* :) */
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`define PROC_MEMIO_GET_UNALIGNED_DATA 6'b010011 /* :( */
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`define PROC_MEMIO_GET_SECOND_BYTE 6'b010100
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`define PROC_MEMIO_GET_SECOND_BYTE1 6'b010101
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`define PROC_DE_LOAD_8_PARAM 6'b010110
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`define PROC_DE_LOAD_8_PARAM_UNALIGNED 6'b010111
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/*EXECUTE STATE*/
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`define PROC_EX_STATE_ENTRY 6'b100000
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/*MEM/IO WRITE*/
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`define PROC_MEMIO_WRITE 6'b101000
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//`define PROC_MEMIO_WRITE_SETADDR 6'b010101
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`define PROC_MEMIO_PUT_ALIGNED_DATA 6'b101001
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`define PROC_MEMIO_PUT_UNALIGNED_DATA 6'b101010
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`define PROC_MEMIO_PUT_BYTE 6'b101011
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`define PROC_MEMIO_PUT_BYTE_STOP_READ 6'b101100
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`define PROC_MEMIO_WRITE_EXIT 6'b101101
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`define PROC_MEMIO_PUT_UNALIGNED_FIRST_BYTE 6'b101110
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`define PROC_MEMIO_PUT_UNALIGNED_PREP_NEXT 6'b101111
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`define PROC_MEMIO_PUT_UNALIGNED_PREP_NEXT1 6'b110001
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`define PROC_MEMIO_PUT_UNALIGNED_PREP_NEXT2 6'b110010
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`define PROC_MEMIO_PUT_UNALIGNED_PREP_NEXT3 6'b110011
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`define PROC_MEMIO_PUT_UNALIGNED_PREP_NEXT4 6'b110100
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`define PROC_NEXT_MICROCODE 6'b111000
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