Your in luck, sort of, because I am actually working on an arduino PC right now! It isn't much though, only the first model. The firmware is also very simple, and has a small API set. But, the thing works! Not good enough to edit BASIC (or any language except its own), but this is only the first model. The mobo is quite simple, and I used this. Here is the firmware I used:
#include <LCD4884.h>
#include <SD.h>
#include <SPI.h>
#include <SoftwareSerial.h>
void setup() {
lcd.LCD_init();
lcd.LCD_clear();
lcd.LCD_write_string_big(0, 0, "Gilbert", MENU_NORMAL);
pinMode(10, OUTPUT);
delay(3000);
}
byte line = 10;
SoftwareSerial FC(8,9);
byte RAM[501];
byte Error = 0;
char tempString[15];
void loop() {
// <editor-fold defaultstate="collapsed" desc="Initilization">
FC.begin(4800);
if (!FC.available()) {
lcd.LCD_clear();
lcd.LCD_write_string(0, 0, "FC Failed!", MENU_NORMAL);
delay(1000);
}
int address = 1;
lcd.LCD_clear();
lcd.LCD_write_string(0, 0, "SD Init...", MENU_NORMAL);
if (!SD.begin(10)) {
lcd.LCD_clear();
lcd.LCD_write_string(0, 0, "SD Failed!", MENU_NORMAL);
while (true) {
;
}
}
lcd.LCD_clear();
lcd.LCD_write_string(0, 0, "Loading...", MENU_NORMAL);
File file;
file = SD.open("BIOS.mk8", FILE_READ);
RAM[0] = 53;
RAM[file.read()] = 8;
while (file.available()) {
RAM[address] = file.read();
address++;
}
address++;
RAM[address] = 55;
long loops = 0;
long time1 = 0;
long time2 = 0;
address = 0;
byte instruction = 0;
int exeaddress;
byte tempbyte;
lcd.LCD_clear();
lcd.LCD_write_string(0, 0, "EMU. Started", MENU_NORMAL);// </editor-fold>
//emulation loop
while(true){
switch(RAM[address]){
// <editor-fold defaultstate="collapsed" desc="Codes 1-10">
case 1:
{//getCycleCount[intvar i]
tempbyte = (loops) / ((time2 - time1) / 1000);
convert(address + 1);
writeInt(exeaddress, tempbyte);
break;
}
case 2:
{//getTemp[intvar i]
tempbyte = (((analogRead(A1) / 1024.0) * 5.0) - .5) * 100;
convert(address + 1);
writeInt(exeaddress, tempbyte);
break;
}
case 3:
{//getKey[intvar i]
//Up 745
//Down 332
//Left 0
//Right 509
//Center 145
switch (analogRead(A0)) {
case 745:
{
tempbyte = 1;
break;
}
case 332:
{
tempbyte = 2;
break;
}
case 0:
{
tempbyte = 3;
break;
}
case 509:
{
tempbyte = 4;
break;
}
case 145:
{
tempbyte = 5;
break;
}
}
convert(address + 1);
writeInt(exeaddress, tempbyte);
break;
}
case 4:
{//printLine[variable v]
if (line > 70) {
lcd.LCD_clear();
line = 0;
}
switch(RAM[address + 1]){
case 9:{
tempbyte = RAM[address + 1];
tempString[0] = char(tempbyte);
break;
}
case 15:{
convert(address + 1);
break;
}
}
lcd.LCD_write_string(0, line, tempString, MENU_NORMAL);
line += 10;
break;
}
case 5:
{//exe detector
exeaddress = address;
break;
}
case 7:
{//lcdClear
lcd.LCD_clear();
line = 0;
break;
}
case 10:
{//declareInteger[string name]
convert(address + 1);
tempbyte = 0;
while (tempbyte != 15) {
RAM[address + tempbyte + 1] = tempString[tempbyte];
}
break;
}// </editor-fold>
case 11:{//getError[intvar i]
tempbyte = Error;
Error = 0;
convert(address + 1);
writeInt(exeaddress, tempbyte);
break;
}
case 12:{//deadlock
while(true){;}
break;
}
case 13:{//assignInteger[int value, intvar i]
tempbyte = RAM[address + 1];
convert(address + 2);
writeInt(exeaddress, tempbyte);
break;
}
case 14:{//transferInteger[intvar i1, intvar i2]
convert(address + 1);
writeInt(exeaddress, RAM[getIntAddr(exeaddress)]);
break;
}
}
// <editor-fold defaultstate="collapsed" desc="post loop process">
address++;
time2 = millis();
loops++;
if (loops < 0) {
loops = 0;
}// </editor-fold>
}
}
void convert(int startAddress){
byte charadd = 0;
while(RAM[startAddress] != 6){
tempString[charadd] = RAM[startAddress];
charadd++;
startAddress++;
}
}
void writeInt(int exeStart, byte value){
byte count = 0;
char compare[15];
while(true){
if (RAM[exeStart] == 9) {
exeStart++;
while (count != 15) {
compare[count] = RAM[exeStart];
exeStart++;
count++;
}
if(compare == tempString){
RAM[exeStart + 2] = value;
break;
}else{
exeStart += 3;
}
if(RAM[exeStart] == 8){
Error = 1;
}
}
}
}
int getIntAddr(int exeStart){
byte count = 0;
char compare[15];
while(true){
if (RAM[exeStart] == 9) {
exeStart++;
while (count != 15) {
compare[count] = RAM[exeStart];
exeStart++;
count++;
}
if(compare == tempString){
return RAM[exeStart + 2];
break;
}else{
exeStart += 3;
}
if(RAM[exeStart] == 8){
Error = 1;
}
}
}
}
The method description is hard to explain, but the code is stored as raw bytes. I should have development software up soon... Hope this helps! If you ever want to use this for any projects, YOU MUST HAVE A BIOS.mk8 file on the root directory of the SD or the system will not work.
