9086/system/exec_state_def.v

47 lines
1.3 KiB
Verilog

/* exec_state_def.v - Definitions of the states in the main state machine
of the 9086 CPU.
This file is part of the 9086 project.
Copyright (c) 2024 Efthymios Kritikos
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
(at your option) 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/>. */
`define EXEC_STATE_BITS 4
//TODO: Please clean this up
`define EXEC_WAIT 4'b1100
/*DECODE SATE*/
`define EXEC_DE_LOAD_REG_TO_PARAM 4'b0011
/*MEM/IO READ*/
`define EXEC_MEMIO_READ 4'b0101
`define EXEC_MEMIO_READ_SETADDR 4'b0110
/*EXECUTE STATE*/
`define EXEC_WRITE_ENTRY 4'b1000
/*MEM/IO WRITE*/
`define EXEC_MEMIO_WRITE 4'b0111
`define EXEC_NEXT_INSTRUCTION 4'b1001
`define EXEC_NEXT_MICROCODE 4'b1010
`define EXEC_RESET 4'b1011
`define EXEC_JUMP_RELEASE 4'b1101