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main.cpp
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main.cpp
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#include <iostream>
#include <atomic>
#include <cstdlib>
#include <cstdio>
#include <bitset>
#include <string.h>
#include <chrono>
#include <thread>
#include <limits>
#include <cstdint>
#include <assert.h>
#include <functional>
#include <vector>
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <map>
#include <sys/socket.h>
#include <netdb.h>
#include <algorithm>
#include <fstream>
#include <sys/time.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <signal.h>
#include <SDL/SDL.h>
#include <SDL/SDL_ttf.h>
#include <math.h>
#include <semaphore.h>
#define STORE32C 3
#define STORE32 2
#define STORE16 1
#define STORE8 0
#define MAX INT32_MAX
#define MIN INT32_MIN
#define ILLEGAL_INSTRUCTION 0
#define PERMISSION_EXCEPTION 1
#define RAPIC_EOI 4
#define RAPIC_DANCE 1
#define RAPIC_FAIRY 2
#define RAPIC_WAIFU 3
class CPUException : public std::exception {
public:
CPUException(int exception_type) {
type = exception_type;
}
int getExceptionType() const {
return type;
}
private:
int type;
};
void split_string(std::string const &k, std::string const &delim, std::vector<std::string> &output)
{
// Due to the use of strpbrk here, this will stop copying at a null char. This is in fact desirable.
char const *last_ptr = k.c_str(), *next_ptr;
while ((next_ptr = strpbrk(last_ptr, delim.c_str())) != nullptr)
{
output.emplace_back(last_ptr, next_ptr - last_ptr);
last_ptr = next_ptr + 1;
}
output.emplace_back(last_ptr);
}
int checked_add(int32_t a, int32_t b, int32_t *rp) {
int64_t lr = (int64_t)a + (int64_t)b;
if(rp != NULL)
*rp = lr;
return lr > MAX || lr < MIN;
}
int checked_sub(int32_t a, int32_t b, int32_t *rp) {
int64_t lr = (int64_t)a - (int64_t)b;
if(rp != NULL)
*rp = lr;
return lr > MAX || lr < MIN;
}
template<bool is_signed, typename T>
class IsNegativeFunctor;
template<typename T>
class IsNegativeFunctor<true, T> {
public:
bool operator()(T x) {
return x < 0;
}
};
template<typename T>
class IsNegativeFunctor<false, T> {
public:
bool operator()(T x) {
// Unsigned type is never negative.
return false;
}
};
template<typename T>
bool IsNegative(T x) {
return IsNegativeFunctor<std::numeric_limits<T>::is_signed, T>()(x);
}
template<typename To, typename From>
bool WillOverflow(From val) {
assert(std::numeric_limits<From>::is_integer);
assert(std::numeric_limits<To>::is_integer);
if (std::numeric_limits<To>::is_signed) {
return (!std::numeric_limits<From>::is_signed &&
(uintmax_t)val > (uintmax_t)INTMAX_MAX) ||
(intmax_t)val < (intmax_t)std::numeric_limits<To>::min() ||
(intmax_t)val > (intmax_t)std::numeric_limits<To>::max();
} else {
return IsNegative(val) ||
(uintmax_t)val > (uintmax_t)std::numeric_limits<To>::max();
}
}
enum instructions {
ADD = 0,
SUB,
MUL,
DIV,
INC,
AND,
OR,
XOR,
NOT,
JMP,
JZ,
JO,
LD,
ST,
CLC,
CLZ,
CALL,
RET,
INT,
HLT,
ADC,
MOV,
PUSH,
POP,
SSP,
GSP,
CMP,
LIT,
CLF,
C2S,
C2A,
C2M,
C2D,
OUT,
IN,
DEC,
C2I,
CDD,
SBP,
GBP,
MOD,
CMD,
IRET,
GFR,
SFR,
DSI,
ENI,
LSL,
RSL,
DSP,
DBP,
SWBS,
POP8,
POP16,
PUSH8,
PUSH16,
//maybe add a conditional move
};
struct MemRange {
MemRange(unsigned int address, unsigned int length) : address(address), length(length) {}
unsigned int address;
unsigned int length;
};
class RMMU {
public:
RMMU(unsigned char* baseptr) {
baseaddr = baseptr;
}
unsigned char* read8(unsigned int offset) {
return (unsigned char*)(baseaddr + offset);
}
unsigned short* read16(unsigned int offset) {
return (unsigned short*)(baseaddr + offset);
}
unsigned int* read32(unsigned int offset) {
return (unsigned int*)(baseaddr + offset);
}
void write(unsigned int assign, unsigned int length, void* val) {
//unsigned char endian[length];
//for(int i = length - 1;i <= 0;i--) {
// endian[i] = ((unsigned char*)val)[(length - i)];
//}
memcpy((baseaddr + assign),&val,length);
}
/*
unsigned char* safecopy(unsigned int length, void* dest, void* src) {
return baseaddr;
}
*/
void map(MemRange mrange,std::function<void(unsigned int, unsigned int, bool)> &func) {
//maps[mrange] = func;
}
private:
//std::map<MemRange,std::function<void(unsigned int, unsigned int, bool)>> maps;
unsigned char* baseaddr;
};
class RIOMMU {
};
class RVM {
public:
RVM(RMMU &mmu) : baseaddr(mmu){
for(int i = ADD;i <= PUSH16;i++) {
jump_offset[i] = 6;
inst_length[i] = 2;
}
jump_offset[PUSH8] = 3;
jump_offset[PUSH16] = 4;
jump_offset[LD] = 2;
jump_offset[ST] = 2;
inst_length[DSP] = 1;
inst_length[DBP] = 1;
inst_length[CLF] = 1;
inst_length[SWBS] = 1;
inst_length[RET] = 1;
inst_length[IRET] = 1;
inst_length[HLT] = 1;
gettimeofday(&initial,NULL);
}
void add_to_clock(std::function<void()> function) {
function_list.push_back(function);
}
int irq(unsigned char interrupt) {
if(flags[2] == 1) {
while(flags[2] == 1){
std::this_thread::sleep_for(std::chrono::microseconds(20));
}
}
this->interrupt = true;
interrupt_vector = interrupt;
std::cout << "Interrupt recieved: " << (int)interrupt_vector << std::endl;
return 1;
}
void start(bool debug, bool silent) {
while(1) {
if(pc == breakpoint) {
gettimeofday(&stop,NULL);
std::cout << "Hit breakpoint: pc=" << pc << std::endl;
std::cout << stop.tv_sec << ":" << stop.tv_usec << std::endl;
std::cout << initial.tv_sec << ":" << initial.tv_usec << std::endl;
goto breakhit;
}
if(debug) {
breakhit:
std::string action;
std::locale ascii;
back:
std::cout << "Step(s) Peek memory(p) Get current instruction(i) Get number of instructions ran(n) Go(g) Set Breakpoint(b) Quiet(q) [S/r/i/n/g/b/q]" << std::endl;
std::getline(std::cin,action);
if(action.size() == 0) {
goto step;
}
char eval_this = std::toupper(action[0],ascii);
if(eval_this == 'S') {
goto step;
} else if(eval_this == 'P') {
int mvalue = std::stoul(action.substr(1).c_str(),0,10);
std::cout << "The memory at " << mvalue << " is " << *baseaddr.read32(mvalue) << std::endl;
goto back;
} else if(eval_this == 'N') {
std::cout << "Number of instructions ran: " << n_inst << std::endl;
goto back;
} else if(eval_this == 'I') {
std::cout << "Instruction: " << std::hex << *baseaddr.read16(pc) << std::dec << std::endl;
goto back;
} else if(eval_this == 'G') {
debug = false;
gettimeofday(&initial,NULL);
goto step;
} else if(eval_this == 'B') {
std::vector<std::string> output;
split_string(action," ",output);
breakpoint = atoi(output[1].c_str());
goto back;
} else if(eval_this == 'Q') {
silent = !silent;
goto back;
}
}
step:
for(size_t i = 0; i < function_list.size(); i++) {
// use this to fake hardware properties and do cool processing stuff
function_list[i]();
}
int halt = false;
int jump = false;
if(interrupt) {
interrupt = false;
stackptr -= 4;
baseaddr.write(stackptr - 3, 4,&pc);
stackptr -= 4;
unsigned int flagval = flags.to_ulong();
baseaddr.write(stackptr - 3,4, &flagval);
jump = true;
pc = *baseaddr.read32(itableptr + interrupt_vector);
goto irq;
}
try {
unsigned char cachedargs = *baseaddr.read8(pc+1);
switch(*baseaddr.read8(pc)) {
case MOD:
if((cachedargs % 2) != 0) {
unsigned int modval = 0;
modval = *baseaddr.read32(pc+2);
r[(cachedargs & 0x1c) >> 2] = r[(cachedargs & 0xe0) >> 5] % modval;
break;
}
r[(cachedargs & 0x1c) >> 2] = r[(cachedargs & 0xe0) >> 5] % r[(cachedargs & 0x1c) >> 2];
break;
case RSL:
if((cachedargs % 2) != 0) {
unsigned int shiftval = 0;
shiftval = *baseaddr.read32(pc+2);
r[(cachedargs & 0xe0) >> 5] = r[(cachedargs & 0xe0) >> 5] >> shiftval;
break;
}
r[(cachedargs & 0xe0) >> 5] = r[(cachedargs & 0xe0) >> 5] >> r[(cachedargs & 0x1c) >> 2];
break;
case LSL:
if((cachedargs % 2) != 0) {
unsigned int shiftval = 0;
shiftval = *baseaddr.read32(pc+2);
r[(cachedargs & 0xe0) >> 5] = r[(cachedargs & 0xe0) >> 5] << shiftval;
break;
}
r[(cachedargs & 0xe0) >> 5] = r[(cachedargs & 0xe0) >> 5] << r[(cachedargs & 0x1c) >> 2];
break;
case JO:
if(!(flags[1] == 1)) {
break;
}
if((cachedargs % 2) != 0) {
unsigned int oldpc = pc;
pc = 0;
pc = *baseaddr.read32(oldpc+2);
jump = true;
break;
}
jump = true;
pc = r[(cachedargs & 0xe0) >> 5];
break;
case C2I: {
int *regptr = (int*)&r[(cachedargs & 0xe0) >> 5];
flags[1] = checked_add(*regptr,1,NULL);
*regptr += 1;
}
break;
case CDD: {
int *regptr = (int*)&r[(cachedargs & 0xe0) >> 5];
flags[1] = checked_sub(*regptr,1,NULL);
*regptr -= 1;
}
break;
case C2S: {
int *regptr = (int*)&r[(cachedargs & 0xe0) >> 5];
if((cachedargs % 2) != 0) {
int addval;
addval = *baseaddr.read32(pc+2);
flags[1] = checked_sub(*regptr,addval,NULL);
*regptr -= addval;
break;
}
flags[1] = checked_sub(*regptr,*((int*)r[(cachedargs & 0x1c) >> 2]),NULL);
*regptr -= *((int*)r[(cachedargs & 0x1c) >> 2]);
}
break;
case C2A: {
int *regptr = (int*)&r[(cachedargs & 0xe0) >> 5];
if((cachedargs % 2) != 0) {
int addval;
addval = *baseaddr.read32(pc+2);
flags[1] = checked_add(*regptr,addval,NULL);
*regptr += addval;
break;
}
flags[1] = checked_add(*regptr,*((int*)r[(cachedargs & 0x1c) >> 2]),NULL);
*regptr += *((int*)r[(cachedargs & 0x1c) >> 2]);
}
break;
case NOT:
if((cachedargs % 2) != 0) {
unsigned int orval;
orval = *baseaddr.read32(pc+2);
r[(cachedargs & 0xe0) >> 5] = ~orval;
break;
}
r[(cachedargs & 0xe0) >> 5] = ~r[(cachedargs & 0x1c) >> 2];
break;
case XOR:
if((cachedargs % 2) != 0) {
unsigned int orval;
orval = *baseaddr.read32(pc+2);
r[(cachedargs & 0xe0) >> 5] ^= orval;
break;
}
r[(cachedargs & 0xe0) >> 5] ^= r[(cachedargs & 0x1c) >> 2];
break;
case OR:
if((cachedargs % 2) != 0) {
unsigned int orval;
orval = *baseaddr.read32(pc+2);
r[(cachedargs & 0xe0) >> 5] |= orval;
break;
}
r[(cachedargs & 0xe0) >> 5] |= r[(cachedargs & 0x1c) >> 2];
break;
case AND:
if((cachedargs % 2) != 0) {
unsigned int andval;
andval = *baseaddr.read32(pc+2);
r[(cachedargs & 0xe0) >> 5] &= andval;
break;
}
r[(cachedargs & 0xe0) >> 5] &= r[(cachedargs & 0x1c) >> 2];
break;
case GBP:
r[(cachedargs & 0xe0) >> 5] = baseptr;
break;
case SBP:
if((cachedargs % 2) != 0) {
unsigned int stckval;
stckval = *baseaddr.read32(pc+2);
baseptr = stckval;
break;
}
baseptr = r[(cachedargs & 0xe0) >> 5];
break;
case GSP:
r[(cachedargs & 0xe0) >> 5] = stackptr;
break;
case ADD:
if((cachedargs % 2) != 0) {
unsigned int addval;
addval = *baseaddr.read32(pc+2);
flags[1] = WillOverflow<unsigned int>((unsigned long)r[(cachedargs & 0xe0) >> 5] + (unsigned long)addval);
r[(cachedargs & 0xe0) >> 5] += addval;
break;
}
flags[1] = WillOverflow<unsigned int>((unsigned long)r[(cachedargs & 0xe0) >> 5] + (unsigned long)r[(cachedargs & 0x1c) >> 2]);
r[(cachedargs & 0xe0) >> 5] += r[(cachedargs & 0x1c) >> 2];
break;
case SUB:
if((cachedargs % 2) != 0) {
unsigned int subval;
subval = *baseaddr.read32(pc+2);
flags[1] = WillOverflow<unsigned int>((long)r[(cachedargs & 0xe0) >> 5] - (long)subval);
r[(cachedargs & 0xe0) >> 5] -= subval;
break;
}
flags[1] = WillOverflow<unsigned int>((long)r[(cachedargs & 0xe0) >> 5] - (long)r[(cachedargs & 0x1c) >> 2]);
r[(cachedargs & 0xe0) >> 5] -= r[(cachedargs & 0x1c) >> 2];
break;
case DSP:
baseptr = stackptr;
break;
case DBP:
stackptr = baseptr;
break;
case SWBS: {
unsigned int stck_dup = stackptr;
unsigned int base_dup = baseptr;
stackptr = base_dup;
baseptr = stck_dup;
break; }
case PUSH:
if((cachedargs % 2) != 0) {
stackptr -= 4;
baseaddr.write(stackptr - 3, 4,baseaddr.read32(pc+2));
break;
}
stackptr -= 4;
baseaddr.write(stackptr - 3, 4, &r[(cachedargs & 0xe0) >> 5]);
break;
case CALL: {
if((cachedargs % 2) != 0) {
unsigned int pc6 = pc+6;
baseaddr.write(stackptr - 3, 4, &pc6);
stackptr -= 4;
pc = *baseaddr.read32(pc+2);
jump = true;
break;
}
unsigned int pc2= pc+2;
baseaddr.write(stackptr - 3, 4, &pc2);
pc = r[(cachedargs & 0xe0) >> 5];
stackptr -= 4;
jump = true;
break; }
case RET:
pc = *baseaddr.read32(stackptr - 3);
stackptr += 4;
jump = true;
break;
case POP:
if(!silent)
std::cout << (unsigned long)(stackptr) << std::endl;
r[(cachedargs & 0xe0) >> 5] = *baseaddr.read32(stackptr - 3);
//r[(cachedargs & 0xe0) >> 5] = (*baseaddr.read8(stackptr - (stackdepth*4) + 3] << 24) | (*baseaddr.read8(stackptr - (stackdepth*4) + 2] << 16) | (*baseaddr.read8(stackptr - (stackdepth*4) + 1] << 8) | *baseaddr.read8(stackptr - (stackdepth*4)];
stackptr += 4;
break;
case SSP:
if((cachedargs % 2) != 0) {
unsigned int stckval;
stckval = *baseaddr.read32(pc+2);
stackptr = stckval;
break;
}
stackptr = r[(cachedargs & 0xe0) >> 5];
break;
case DEC:
r[(cachedargs & 0xe0) >> 5]--;
break;
case CLF:
flags = 0;
break;
case CMP:
if((cachedargs % 2) != 0) {
unsigned int cmpval;
cmpval = *baseaddr.read32(pc+2);
flags[0] = r[(cachedargs & 0xe0) >> 5] == cmpval;
break;
}
flags[0] = r[(cachedargs & 0xe0) >> 5] == r[(cachedargs & 0x1c) >> 2];
break;
case JZ:
if(!(flags[0] == 1)) {
break;
}
if((cachedargs % 2) != 0) {
unsigned long oldpc = pc;
pc = *baseaddr.read32(oldpc+2);
jump = true;
break;
}
jump = true;
pc = r[(cachedargs & 0xe0) >> 5];
break;
case JMP:
if((cachedargs % 2) != 0) {
unsigned long oldpc = pc;
pc = *baseaddr.read32(oldpc+2);
jump = true;
break;
}
jump = true;
pc = r[(cachedargs & 0xe0) >> 5];
break;
case MOV:
if((cachedargs % 2) != 0) {
std::cout << std::hex << baseaddr.read32(pc + 2) << std::dec << std::endl;
r[(cachedargs & 0xe0) >> 5] = *baseaddr.read32(pc + 2);
break;
}
r[(cachedargs & 0xe0) >> 5] = r[(cachedargs & 0x1c) >> 2];
break;
case INC:
r[(cachedargs & 0xe0) >> 5]++;
break;
case HLT:
halt = true;
break;
case LIT:
if((cachedargs % 2) != 0) {
itableptr = *baseaddr.read32(pc+2);
break;
}
itableptr = r[(cachedargs & 0x1c) >> 2];
break;
case INT: {
if((cachedargs % 2) != 0) {
stackptr -= 4;
unsigned int pc3 = pc + 3;
baseaddr.write(stackptr - 3, 4, &pc3);
stackptr -= 4;
unsigned int flagval = flags.to_ulong();
baseaddr.write(stackptr - 3,4, &flagval);
jump = true;
pc = *baseaddr.read32(itableptr + interrupt + *baseaddr.read8(pc+2));
break;
}
stackptr -= 4;
unsigned int pc2 = pc + 2;
baseaddr.write(stackptr - 3, 4, &pc2);
stackptr -= 4;
unsigned int flagval = flags.to_ulong();
baseaddr.write(stackptr - 3,4, &flagval);
jump = true;
pc = *baseaddr.read32(itableptr + r[(cachedargs & 0x1c) >> 2]);
break; }
case IRET: {
flags = std::bitset<8>(*baseaddr.read32(stackptr - 3));
stackptr += 4;
pc = baseaddr.read32(stackptr - 3);
stackptr += 4;
jump = true;
break; }
case LD: {
unsigned int bytes = (cachedargs & 0x03);
if(bytes == 2) {
throw CPUException(ILLEGAL_INSTRUCTION);
}
if(!silent) {
std::cout << r[(cachedargs & 0x1c) >> 2] << std::endl;
std::cout << ((cachedargs & 0x1c) >> 2) << std::endl;
}
unsigned int stval = r[(cachedargs & 0x1c) >> 2];
r[(cachedargs & 0xe0) >> 5] = 0;
switch(bytes) {
case 0:
r[(cachedargs & 0xe0) >> 5] = *baseaddr.read8(stval);
break;
case 1:
r[(cachedargs & 0xe0) >> 5] = *baseaddr.read16(stval);
break;
case 3:
r[(cachedargs & 0xe0) >> 5] = *baseaddr.read32(stval);
break;
}
break; }
case ST: {
unsigned int bytes = (cachedargs & 0x03);
if(bytes == 2) {
throw CPUException(ILLEGAL_INSTRUCTION);
}
if(!silent) {
std::cout << "storing to " << std::endl;
std::cout << r[(cachedargs & 0x1c) >> 2] << std::endl;
std::cout << ((cachedargs & 0x1c) >> 2) << std::endl;
}
unsigned int stval = r[(cachedargs & 0x1c) >> 2];
baseaddr.write(stval, bytes, &r[(cachedargs & 0xe0) >> 5]);
break; }
case POP8:
r[(cachedargs & 0xe0) >> 5] = *baseaddr.read8(stackptr);
stackptr += 1;
break;
case POP16:
r[(cachedargs & 0xe0) >> 5] = *baseaddr.read16(stackptr - 1);
stackptr += 2;
break;
case PUSH16:
if((cachedargs % 2) != 0) {
stackptr -= 2;
baseaddr.write(stackptr -1, 2, baseaddr.read16(pc+2));
break;
}
stackptr -= 2;
baseaddr.write(stackptr -1, 2, &r[(cachedargs & 0xe0) >> 5]);
break;
case PUSH8:
if((cachedargs % 2) != 0) {
stackptr -= 1;
baseaddr.write(stackptr, 1, baseaddr.read8(pc+2));
break;
}
stackptr -= 1;
baseaddr.write(stackptr, 1, &r[(cachedargs & 0xe0) >> 5]);
break;
default:
throw CPUException(ILLEGAL_INSTRUCTION);
break;
}
} catch(const CPUException &exception) {
stackptr -= 4;
baseaddr.write(stackptr - 3, 4, &pc);
stackptr -= 4;
unsigned int flagval = flags.to_ulong();
baseaddr.write(stackptr - 3,4, &flagval);
jump = true;
pc = *baseaddr.read32(itableptr + exception.getExceptionType());
}
n_inst++;
if(!silent) {
std::cout << n_inst << std::endl;
std::cout << "Base pointer location:" << baseptr << std::endl;
std::cout << "Current stack location:" << stackptr << std::endl;
/*
if(baseptr != 0) {
for(size_t i =0; i <= (stackptr - baseptr);i++) {
std::cout << (unsigned long)(baseaddr + stackptr - i) << std::endl;
std::cout << (unsigned int)(*baseaddr.read8(stackptr - i]) << std::endl;
}
}
*/
std::cout << "Registers: ";
for(int i =0;i < 8;i++) {
std::cout << r[i];
if(i != 7)
std::cout << ":";
}
std::cout << std::endl;
std::cout << "Program Counter: " << pc << std::endl;
}
if(halt) {
if(!silent)
std::cout << "Halting." << std::endl;
HLTed = true;
break;
} else if (jump) {
irq:
if(!silent)
std::cout << "Jumping to: " << pc << std::endl;
continue;
}
if(((*baseaddr.read8(pc+1) % 2) != 0) && !(inst_length[*baseaddr.read8(pc)] == 1)) {
pc += jump_offset[*baseaddr.read8(pc)];
continue;
}
pc += inst_length[*baseaddr.read8(pc)];
}
}
unsigned char interrupt_vector;
std::bitset<8> flags;
unsigned int r[8] = {0,0,0,0,0,0,0,0};
std::vector<std::function<void()>> function_list;
std::map<int,int> jump_offset;
std::map<int,int> inst_length;
private:
long breakpoint = -1;
unsigned long n_inst = 0;
RMMU &baseaddr;
int HLTed = false;
int interrupt = false;
int interrupts_enabled = true;
unsigned int itableptr = 0;
unsigned int stackptr = 0;
unsigned int baseptr = 0;
unsigned int pc = 0;
timeval initial, stop;
};
class RAPIC {
public:
RAPIC(RVM &rvm, RMMU &mmu) : mmu(mmu), r(rvm) {
sem_init(&semaphore, 0, 1);
}
void interrupt(unsigned char num){
std::cout << "Maxed: " << std::min((int)num,64) << std::endl;
interrupts[std::min((int)num,64)] = 1;
sem_post(&semaphore);
}
void check_for_interrupts() {
for(size_t i = 0; i < 64; i++){
if(interrupts[i] == 1) {
interrupts[i] = 0;
holding_line = true;
current_interrupt = i;
r.irq(i + 16);
break;
}
}
}
void work_loop() {
while(true) {
if(!holding_line) {
check_for_interrupts();
if(!holding_line) {
sem_wait(&semaphore);
}
}
if(holding_line && (*mmu.read8(16000) == RAPIC_EOI)) {
holding_line = false;
current_interrupt = 0x9001;
unsigned int zero = 0;
mmu.write(16000, 1, &zero);
}
}
}
private:
sem_t semaphore;
RMMU &mmu;
RVM &r;
unsigned char current_interrupt;
bool holding_line = false;
std::bitset<64> interrupts;
};
class RGA {
public:
RGA(unsigned char* ptr, RAPIC &rapic): rapic(rapic) {
SDL_Init(SDL_INIT_EVERYTHING);
screen = SDL_SetVideoMode(320,240,32,SDL_DOUBLEBUF);
TTF_Init();
memory = ptr;
palette[0].r = 0;
palette[0].g = 0;
palette[0].b = 0;
palette[1].r = 0;
palette[1].g = 0;
palette[1].b = 170;
palette[2].r = 0;
palette[2].g = 170;
palette[2].b = 0;
}
void do_stuff() {
if(memory[16383] != 0) {
//std::cout << "Blitting framebuffer to screen" << std::endl;
SDL_Surface *buf = SDL_CreateRGBSurfaceFrom(&memory[16384],320,240,8,320,0,0,0,0);
SDL_SetPalette(buf,SDL_LOGPAL | SDL_PHYSPAL,palette,0,256);
SDL_BlitSurface(buf,NULL,screen,NULL);
SDL_Flip(screen);
memory[16383] = 0;
SDL_FreeSurface(buf);
}
}
~RGA() {
delete[] palette;
}
private:
RAPIC &rapic;
SDL_Color *palette = new SDL_Color[256];
SDL_Surface *screen;
unsigned char* memory;
};
class RTTY {
public:
RTTY(unsigned char *ptr, RAPIC &rapic): rapic(rapic) {
memory = ptr;
server = socket(AF_INET,SOCK_STREAM,0);
int enable = 1;
setsockopt(server,SOL_SOCKET,SO_REUSEADDR,&enable,sizeof(int));
sockaddr_in localhost;
memset(&localhost,'0',sizeof(localhost));
localhost.sin_family = AF_INET;
localhost.sin_port = htons(3423);
localhost.sin_addr.s_addr = htonl(INADDR_ANY);
bind(server,(struct sockaddr*)&localhost,sizeof(localhost));
listen(server,4);
conn_thread = std::thread(&RTTY::acceptconnections,this);
conn_thread.detach();
signal(SIGPIPE,SIG_IGN);
}
void acceptconnections() {
while(true) {
clients.push_back(accept(server,NULL,NULL));
}
}
void do_stuff() {
if(memory[16282] != 0) {
rapic.interrupt(24);
for(int client : clients) {
char data = 0;
ssize_t retval = recv(client,&data,1,MSG_DONTWAIT);
if(retval == -1) {
if (errno != EAGAIN && errno != EWOULDBLOCK) {
clients.erase(std::remove(clients.begin(),clients.end(),client),clients.end());
continue;
}
}
if(retval == 0) {
clients.erase(std::remove(clients.begin(),clients.end(),client),clients.end());
continue;
}
send(client,&memory[16281],1,0);
}
}
memory[16282] = 0;
}
private:
RAPIC &rapic;
std::thread conn_thread;
std::vector<int> clients;
int server;
unsigned char *memory;
};
using namespace std;
int main()
{
unsigned char *arr = new unsigned char[16777216]; //16M of ram
memset(arr,0x00,16777216);
RMMU mmu(arr);
RVM rvm(mmu);
RAPIC rapic(rvm, mmu);
RTTY tty(arr,rapic);
RGA rga(arr,rapic);
rvm.add_to_clock(std::bind(&RTTY::do_stuff,&tty));
rvm.add_to_clock(std::bind(&RGA::do_stuff,&rga));
fstream f("test.rom");
if(f.is_open()) {
char c;
int i =0;
while(f.get(c)) {
arr[i] = c;
i++;
}
}
/*arr[255] = 'H';
arr[256] = 'e';
arr[257] = 'l';
arr[258] = 'l';
arr[259] = 'o';
arr[260] = ' ';
arr[261] = 'w';
arr[262] = 'o';
arr[263] = 'r';
arr[264] = 'l';
arr[265] = 'd';
arr[266] = '!';
arr[267] = '\n';
arr[16383] = 1;
arr[43] = HLT;
arr[0] = SSP;
arr[1] = 0x01;
arr[2] = 0x00;
arr[3] = 0x00;
arr[4] = 0x00;
arr[5] = 0xff;
arr[6] = POP8;
arr[7] = 0xe0;
arr[8] = 0xff;
arr[9] = 0xe1;
arr[10] = 0x00;
arr[11] = 0x00;
arr[12] = 0x00;
arr[13] = 0x00;
arr[14] = JZ;
arr[15] = 0x01;
arr[16] = 0x00;
arr[17] = 0x00;
arr[18] = 0x00;
arr[19] = 0x2b;
arr[20] = MOV;
arr[21] = 0x01;
arr[22] = 0x00;
arr[23] = 0x00;
arr[24] = 0x3f;
arr[25] = 0x99;
arr[26] = ST;
arr[27] = 0xe0;
arr[28] = INC;
arr[29] = 0x00;
arr[30] = ST;
arr[31] = 0xe0;
arr[32] = DEC;
arr[33] = 0x00;
arr[34] = JMP;
arr[35] = 0x01;