------------------------------------------------------------------------- -- Project: JCPU, a portable 8-bit RISC CPU written in VHDL -- This file: The ROM file for use in your VHDL design -- -- Copyright (C) 2007 J. Ahrensfeld -- -- 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 . -- -- For questions and ideas, please contact the author at jens@jayfield.org -- -------------------------------------------------------------------------- LIBRARY ieee; use IEEE.STD_LOGIC_1164.ALL; USE ieee.numeric_std.ALL; library work; use work.cpu_pkg.all; -- JASM_ROM_INSERT_HERE ENTITY irom IS Port ( clk : in STD_LOGIC; ce : in STD_LOGIC; addr : in inst_addr_t; dout : out inst_t ); END irom; ARCHITECTURE hallo_welt_uart OF irom IS type imem_rom_t is array (0 to 124) of inst_t; -- Assembled from hallo_welt_uart.jsm constant imem_rom : imem_rom_t := ( "110000" & X"002", -- 0x000: JMP 0x002 "111111" & X"000", -- 0x001: RETI "101000" & X"020", -- 0x002: XIN R00, (0x02) "111011" & X"029", -- 0x003: CALL 0x029 "111011" & X"039", -- 0x004: CALL 0x039 "000010" & X"010", -- 0x005: MOV R00, R01 "111011" & X"039", -- 0x006: CALL 0x039 "000011" & X"001", -- 0x007: MOV R01, 0x00 "111011" & X"030", -- 0x008: CALL 0x030 "000011" & X"031", -- 0x009: MOV R01, 0x03 "111011" & X"030", -- 0x00A: CALL 0x030 "101001" & X"000", -- 0x00B: CIN R00, (0x00) "010001" & X"300", -- 0x00C: ADD R00, 0x30 "111011" & X"039", -- 0x00D: CALL 0x039 "000011" & X"001", -- 0x00E: MOV R01, 0x00 "111011" & X"030", -- 0x00F: CALL 0x030 "000011" & X"0D1", -- 0x010: MOV R01, 0x0D "111011" & X"030", -- 0x011: CALL 0x030 "000011" & X"161", -- 0x012: MOV R01, 0x16 "111011" & X"030", -- 0x013: CALL 0x030 "000011" & X"A0F", -- 0x014: MOV R15, 0xA0 "001111" & X"00F", -- 0x015: TST R15 "110001" & X"020", -- 0x016: JZ 0x020 "010101" & X"01F", -- 0x017: DEC R15 "000011" & X"301", -- 0x018: MOV R01, 0x30 "001111" & X"3A1", -- 0x019: CMP R01, 0x3A "111001" & X"01F", -- 0x01A: JEQ 0x01F "000010" & X"010", -- 0x01B: MOV R00, R01 "010001" & X"011", -- 0x01C: INC R01 "111011" & X"039", -- 0x01D: CALL 0x039 "110000" & X"019", -- 0x01E: JMP 0x019 "110000" & X"015", -- 0x01F: JMP 0x015 "000011" & X"001", -- 0x020: MOV R01, 0x00 "111011" & X"030", -- 0x021: CALL 0x030 "110000" & X"009", -- 0x022: JMP 0x009 "011001" & X"0F0", -- 0x023: AND R00, 0x0F "001111" & X"0A0", -- 0x024: CMP R00, 0x0A "110101" & X"027", -- 0x025: JLT 0x027 "010001" & X"070", -- 0x026: ADD R00, 0x07 "010001" & X"300", -- 0x027: ADD R00, 0x30 "111110" & X"000", -- 0x028: RET "111100" & X"000", -- 0x029: PUSH R00 "111011" & X"023", -- 0x02A: CALL 0x023 "000010" & X"001", -- 0x02B: MOV R01, R00 "111101" & X"000", -- 0x02C: POP R00 "101010" & X"000", -- 0x02D: SWAP R00 "111011" & X"023", -- 0x02E: CALL 0x023 "111110" & X"000", -- 0x02F: RET "111100" & X"000", -- 0x030: PUSH R00 "000100" & X"010", -- 0x031: MOVX R00, (R01) "010001" & X"011", -- 0x032: INC R01 "001111" & X"000", -- 0x033: TST R00 "110001" & X"037", -- 0x034: JZ 0x037 "111011" & X"039", -- 0x035: CALL 0x039 "110000" & X"031", -- 0x036: JMP 0x031 "111101" & X"000", -- 0x037: POP R00 "111110" & X"000", -- 0x038: RET "110000" & X"03A", -- 0x039: JMP 0x03A "111100" & X"001", -- 0x03A: PUSH R01 "101000" & X"061", -- 0x03B: XIN R01, (0x06) "011001" & X"021", -- 0x03C: AND R01, 0x02 "110010" & X"03B", -- 0x03D: JNZ 0x03B "100100" & X"020", -- 0x03E: XOUT (0x02), R00 "111101" & X"001", -- 0x03F: POP R01 "111110" & X"000", -- 0x040: RET "111100" & X"001", -- 0x041: PUSH R01 "101000" & X"061", -- 0x042: XIN R01, (0x06) "011001" & X"101", -- 0x043: AND R01, 0x10 "110010" & X"042", -- 0x044: JNZ 0x042 "101000" & X"020", -- 0x045: XIN R00, (0x02) "111101" & X"001", -- 0x046: POP R01 "111110" & X"000", -- 0x047: RET "111100" & X"00F", -- 0x048: PUSH R15 "000011" & X"0AF", -- 0x049: MOV R15, 0x0A "111011" & X"04F", -- 0x04A: CALL 0x04F "010101" & X"01F", -- 0x04B: DEC R15 "110010" & X"04A", -- 0x04C: JNZ 0x04A "111101" & X"00F", -- 0x04D: POP R15 "111110" & X"000", -- 0x04E: RET "111100" & X"00F", -- 0x04F: PUSH R15 "000011" & X"0AF", -- 0x050: MOV R15, 0x0A "111011" & X"056", -- 0x051: CALL 0x056 "010101" & X"01F", -- 0x052: DEC R15 "110010" & X"051", -- 0x053: JNZ 0x051 "111101" & X"00F", -- 0x054: POP R15 "111110" & X"000", -- 0x055: RET "111100" & X"00F", -- 0x056: PUSH R15 "000011" & X"0AF", -- 0x057: MOV R15, 0x0A "111011" & X"05D", -- 0x058: CALL 0x05D "010101" & X"01F", -- 0x059: DEC R15 "110010" & X"058", -- 0x05A: JNZ 0x058 "111101" & X"00F", -- 0x05B: POP R15 "111110" & X"000", -- 0x05C: RET "111100" & X"00F", -- 0x05D: PUSH R15 "000011" & X"0AF", -- 0x05E: MOV R15, 0x0A "111011" & X"064", -- 0x05F: CALL 0x064 "010101" & X"01F", -- 0x060: DEC R15 "110010" & X"05F", -- 0x061: JNZ 0x05F "111101" & X"00F", -- 0x062: POP R15 "111110" & X"000", -- 0x063: RET "111100" & X"00F", -- 0x064: PUSH R15 "000011" & X"0AF", -- 0x065: MOV R15, 0x0A "111011" & X"06B", -- 0x066: CALL 0x06B "010101" & X"01F", -- 0x067: DEC R15 "110010" & X"066", -- 0x068: JNZ 0x066 "111101" & X"00F", -- 0x069: POP R15 "111110" & X"000", -- 0x06A: RET "111100" & X"00F", -- 0x06B: PUSH R15 "000011" & X"63F", -- 0x06C: MOV R15, 0x63 "000000" & X"000", -- 0x06D: NOP "000000" & X"000", -- 0x06E: NOP "000000" & X"000", -- 0x06F: NOP "010101" & X"01F", -- 0x070: DEC R15 "110010" & X"06D", -- 0x071: JNZ 0x06D "111101" & X"00F", -- 0x072: POP R15 "111110" & X"000", -- 0x073: RET "111100" & X"00F", -- 0x074: PUSH R15 "000011" & X"09F", -- 0x075: MOV R15, 0x09 "000000" & X"000", -- 0x076: NOP "000000" & X"000", -- 0x077: NOP "000000" & X"000", -- 0x078: NOP "010101" & X"01F", -- 0x079: DEC R15 "110010" & X"076", -- 0x07A: JNZ 0x076 "111101" & X"00F", -- 0x07B: POP R15 "111110" & X"000" -- 0x07C: RET ); begin PROM_READ: process(clk, ce) begin if rising_edge(clk) and ce = '1' then dout <= imem_rom(to_integer(addr)); end if; end process; end hallo_welt_uart;