50 lines
1.4 KiB
Verilog
50 lines
1.4 KiB
Verilog
/* exec_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 EXEC_STATE_BITS 4
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`define EXEC_HALT 4'b0000
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`define EXEC_DONE 4'b1100
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/*DECODE SATE*/
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`define EXEC_DE_LOAD_16_PARAM 4'b0010
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`define EXEC_DE_LOAD_REG_TO_PARAM 4'b0011
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`define EXEC_DE_LOAD_8_PARAM 4'b0100
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/*MEM/IO READ*/
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`define EXEC_MEMIO_READ 4'b0101
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`define EXEC_MEMIO_READ_SETADDR 4'b0110
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/*EXECUTE STATE*/
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`define EXEC_WRITE_ENTRY 4'b1000
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/*MEM/IO WRITE*/
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`define EXEC_MEMIO_WRITE 4'b0111
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`define EXEC_NEXT_INSTRUCTION 4'b1001
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`define EXEC_NEXT_MICROCODE 4'b1010
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`define EXEC_RESET 4'b1011
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`define EXEC_JUMP_RELEASE 4'b1101
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