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/*-------------------------------------------------------------------
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/*-------------------------------------------------------------------
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-- TITLE: M-lite CPU in software. Executes MIPS(tm) opcodes.
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-- TITLE: Plasma CPU in software. Executes MIPS(tm) opcodes.
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-- AUTHOR: Steve Rhoads (rhoadss@yahoo.com)
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-- AUTHOR: Steve Rhoads (rhoadss@yahoo.com)
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-- DATE CREATED: 1/31/01
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-- DATE CREATED: 1/31/01
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-- FILENAME: mlite.c
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-- FILENAME: mlite.c
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-- PROJECT: M-lite CPU core
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-- PROJECT: Plasma CPU core
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-- COPYRIGHT: Software placed into the public domain by the author.
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-- COPYRIGHT: Software placed into the public domain by the author.
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-- Software 'as is' without warranty. Author liable for nothing.
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-- Software 'as is' without warranty. Author liable for nothing.
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-- DESCRIPTION:
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-- DESCRIPTION:
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-- M-lite CPU simulator in C code.
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-- Plasma CPU simulator in C code.
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-- This file served as the starting point for the VHDL code.
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-- This file served as the starting point for the VHDL code.
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--------------------------------------------------------------------*/
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--------------------------------------------------------------------*/
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#include <stdio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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answer[1]&=0xffff;
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answer[1]&=0xffff;
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*hi=answer[2];
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*hi=answer[2];
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*lo=(answer[1]<<16)+answer[0];
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*lo=(answer[1]<<16)+answer[0];
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}
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}
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//execute one cycle of a M-lite CPU
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//execute one cycle of a Plasma CPU
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void cycle(State *s,int show_mode)
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void cycle(State *s,int show_mode)
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{
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{
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unsigned long opcode;
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unsigned long opcode;
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unsigned long op,rs,rt,rd,re,func,imm,target;
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unsigned long op,rs,rt,rd,re,func,imm,target;
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long imm_shift,branch=0,lbranch=2;
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long imm_shift,branch=0,lbranch=2;
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int main(int argc,char *argv[])
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int main(int argc,char *argv[])
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{
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{
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State state,*s=&state;
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State state,*s=&state;
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FILE *in;
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FILE *in;
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long bytes,index;
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long bytes,index;
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printf("M-lite emulator\n");
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printf("Plasma emulator\n");
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memset(s,0,sizeof(State));
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memset(s,0,sizeof(State));
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s->big_endian=0;
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s->big_endian=0;
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s->mem=malloc(MEM_SIZE);
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s->mem=malloc(MEM_SIZE);
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if(argc<=1) {
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if(argc<=1) {
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printf(" Usage: mlite file.exe\n");
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printf(" Usage: mlite file.exe\n");
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