44 lines
1.5 KiB
Verilog
44 lines
1.5 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_HALT_STATE 4'b0000
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/*INSTRUCTION FETCH STATE*/
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`define PROC_IF_STATE_ENTRY 4'b0001
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`define PROC_IF_WRITE_CIR 4'b0010
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`define PROC_IF_STATE_EXTRA_FETCH_SET 4'b0011
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`define PROC_IF_STATE_EXTRA_FETCH 4'b1111 /******/
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/*DECODE SATE*/
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`define PROC_DE_STATE_ENTRY 4'b0100
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`define PROC_DE_LOAD_16_PARAM 4'b0101
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`define PROC_DE_LOAD_16_EXTRA_FETCH_SET 4'b0110
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`define PROC_DE_LOAD_16_EXTRA_FETCH 4'b0111
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/*MEM/IO READ*/
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`define RPOC_MEMIO_READ 4'b1100
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`define PROC_MEMIO_SETADDR 4'b1101
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`define PROC_MEMIO_GET_ALIGNED_DATA 4'b1110 /* :) */
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`define PROC_MEMIO_GET_UNALIGNED_DATA 4'b1010 /* :( */
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/*EXECUTE STATE*/
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`define PROC_EX_STATE_ENTRY 4'b1000
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`define PROC_EX_STATE_EXIT 4'b1001
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