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main.cpp
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main.cpp
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/*
*--------------------------------------------------------------------
* Project: VM65 - Virtual Machine/CPU emulator programming
* framework.
*
* File: main.cpp
*
* Purpose: Define User Interface, Debug Console and main loop
* of the app.
*
* Date: 8/25/2016
*
* Copyright: (C) by Marek Karcz 2016. All rights reserved.
*
* Contact: [email protected]
*
* License Agreement and Warranty:
This software is provided with No Warranty.
I (Marek Karcz) will not be held responsible for any damage to
computer systems, data or user's health resulting from use.
Please proceed responsibly and exercise common sense.
This software is provided in hope that it will be useful.
It is free of charge for non-commercial and educational use.
Distribution of this software in non-commercial and educational
derivative work is permitted under condition that original
copyright notices and comments are preserved. Some 3-rd party work
included with this project may require separate application for
permission from their respective authors/copyright owners.
*--------------------------------------------------------------------
*/
#include <cstdlib>
#include <iostream>
#include <bitset>
#include <chrono>
#include <thread>
#include <string.h>
#include "system.h"
#include "MKCpu.h"
#include "Memory.h"
#include "Display.h"
#include "VMachine.h"
#include "GraphDisp.h"
#include "MemMapDev.h"
#include "ConsoleIO.h"
#include "MKGenException.h"
using namespace std;
using namespace MKBasic;
#define ANIM_DELAY 250
#define PROMPT_ADDR "Address (0..FFFF): "
#define PROMPT_START_ADDR "Start address (0..FFFF): "
#define PROMPT_RANGE_ADDR "Enter address range (0..0xFFFF).."
#define PROMPT_END_ADDR "End address (0..FFFF): "
const bool ClsIfDirty = true;
char diss_buf[DISS_BUF_SIZE]; // last disassembled instruction buffer
char curr_buf[DISS_BUF_SIZE]; // current disassembled instruction buffer
VMachine *pvm = NULL;
ConsoleIO *pconio = NULL;
Regs *preg = NULL;
bool ioecho = false, opbrk = false, needhelp = false;
bool loadbin = false, loadhex = false, reset = false, execvm = false;
int g_stackdisp_lines = 1;
string ramfile = "dummy.ram";
bool ShowRegs(Regs *preg, VMachine *pvm, bool ioecho, bool showiostat);
void ShowHelp();
void CmdArgHelp(string prgname);
void CopyrightBanner();
/*
*--------------------------------------------------------------------
* Method: PressEnter2Cont()
* Purpose: Print a message and wait for ENTER to be pressed.
* Arguments: msg - string : message
* Returns:
*--------------------------------------------------------------------
*/
void PressEnter2Cont(string msg)
{
string mesg = msg;
if (0 == msg.length()) mesg = "Press [ENTER]...";
cout << mesg;
fflush(stdin);
while (true) {
int c = getchar();
if ('\n' == c || EOF == c) break;
}
}
/*
*--------------------------------------------------------------------
* Method: RunSingleInstr()
* Purpose: Execute single instruction of the CPU (all cycles).
* Arguments: addr - unsigned short, instruction address
* Returns: pointer to CPU registers
*--------------------------------------------------------------------
*/
Regs *RunSingleInstr(unsigned short addr)
{
Regs *ret = NULL;
pvm->Disassemble(addr, diss_buf);
// skip # cycles per op-code specs
do {
ret = pvm->Step(addr);
} while (ret->CyclesLeft > 0);
// and now execute the actual op-code
ret = pvm->Step(addr);
pvm->Disassemble(ret->PtrAddr, curr_buf);
return ret;
}
/*
*--------------------------------------------------------------------
* Method: RunSingleCurrInstr()
* Purpose: Execute single instruction of the CPU (all cycles)
* at current address.
* Arguments: n/a
* Returns: pointer to CPU registers
*--------------------------------------------------------------------
*/
Regs *RunSingleCurrInstr()
{
Regs *ret = NULL;
pvm->Disassemble(preg->PtrAddr, diss_buf);
// skip # cycles per op-code specs
do {
ret = pvm->Step();
} while (ret->CyclesLeft > 0);
// and now execute the actual op-code
ret = pvm->Step();
pvm->Disassemble(ret->PtrAddr, curr_buf);
return ret;
}
/*
*--------------------------------------------------------------------
* Method: VMErr
* Purpose: Data structure and macros supporting VM errors
* messages
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
#define WARN_UNEXPECTED_EOF "WARNING: Unexpected EOF (image shorter than 64kB)."
#define WARN_NOHDR_BINIMG "WARNING: No header found in binary image."
#define WARN_HDRPRBLM_BINIMG "WARNING: Problem with binary image header."
struct VMErr {
int id;
char text1[80];
char text2[80];
} g_vmerrtbl[] = {
{MEMIMGERR_RAMBIN_EOF, WARN_UNEXPECTED_EOF, ""},
{MEMIMGERR_RAMBIN_OPEN, "WARNING: Unable to open memory image file.", ""},
{MEMIMGERR_RAMBIN_HDR, WARN_HDRPRBLM_BINIMG, ""},
{MEMIMGERR_RAMBIN_NOHDR, WARN_NOHDR_BINIMG, ""},
{MEMIMGERR_RAMBIN_HDRANDEOF, WARN_HDRPRBLM_BINIMG, WARN_UNEXPECTED_EOF},
{MEMIMGERR_RAMBIN_NOHDRANDEOF,WARN_NOHDR_BINIMG, WARN_UNEXPECTED_EOF},
{MEMIMGERR_INTELH_OPEN, "WARNING: Unable to open Intel HEX file.", ""},
{MEMIMGERR_INTELH_SYNTAX, "ERROR: Syntax error.", ""},
{MEMIMGERR_INTELH_FMT, "ERROR: Intel HEX format error.", ""},
{MEMIMGERR_VM65_OPEN, "ERROR: Unable to open memory definition file.", ""},
{MEMIMGERR_VM65_IGNPROCWRN, "WARNING: There were problems while processing memory definition file.", ""},
{VMERR_SAVE_SNAPSHOT, "WARNING: There was a problem saving memory snapshot.", ""},
{-1, "", ""}
};
/*
*--------------------------------------------------------------------
* Method: PrintVMErr()
* Purpose: Print the warning/error message.
* Arguments: err - integer, error code
* Returns: n/a
*--------------------------------------------------------------------
*/
void PrintVMErr(int err)
{
bool pressenter = false;
for (int i=0; g_vmerrtbl[i].id >= 0; i++) {
if (g_vmerrtbl[i].id == err) {
pressenter = true;
if (strlen(g_vmerrtbl[i].text1)) {
cout << g_vmerrtbl[i].text1 << endl;
}
if (strlen(g_vmerrtbl[i].text2)) {
cout << g_vmerrtbl[i].text2 << endl;
}
break;
}
}
if (pressenter) {
PressEnter2Cont("");
}
}
#if defined(LINUX)
#include <signal.h>
void trap_signal(int signum);
/*
*--------------------------------------------------------------------
* Method: trap_signal()
* Purpose: handle signal
* Arguments: signum - signal #
* Returns: n/a
*--------------------------------------------------------------------
*/
void trap_signal(int signum)
{
if (NULL != pconio) {
pconio->CloseCursesScr();
}
if (NULL != pvm && NULL != preg) {
pvm->SetOpInterrupt(true);
opbrk = true;
}
cout << "Signal caught: " << dec << signum << endl;
return;
}
/*
*--------------------------------------------------------------------
* Method: reset_terminal_mode()
* Purpose: Close curses window.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void reset_terminal_mode()
{
if (NULL != pconio) pconio->CloseCursesScr();
cout << "Thank you for using VM65." << endl;
}
#endif // #if defined(LINUX)
#if defined(WINDOWS)
#include <windows.h>
BOOL CtrlHandler(DWORD fdwCtrlType);
/*
*--------------------------------------------------------------------
* Method: CtrlHandler()
* Purpose: handle signal
* Arguments: fdwCtrlType - event type
* Returns: BOOL - TRUE if event handled, FALSE if needs further
* processing.
*--------------------------------------------------------------------
*/
BOOL CtrlHandler(DWORD fdwCtrlType)
{
switch( fdwCtrlType )
{
case CTRL_C_EVENT:
if (NULL != pvm && NULL != preg) {
pvm->SetOpInterrupt(true);
opbrk = true;
}
return TRUE;
case CTRL_CLOSE_EVENT:
cout << "Ctrl-Close event" << endl;
return TRUE ;
case CTRL_BREAK_EVENT:
if (NULL != pvm && NULL != preg) {
pvm->SetOpInterrupt(true);
opbrk = true;
}
return TRUE;
case CTRL_LOGOFF_EVENT:
cout << "Ctrl-Logoff event" << endl;
return FALSE;
case CTRL_SHUTDOWN_EVENT:
Beep( 750, 500 );
cout << "Ctrl-Shutdown event" << endl;
return FALSE;
default:
return FALSE;
}
}
#endif
/*
*--------------------------------------------------------------------
* Method: PromptNewAddress()
* Purpose: Prompt user to enter 16-bit address (hex) in console.
* Arguments: prompt - prompt text
* Returns: unsigned int - address entered by user
*--------------------------------------------------------------------
*/
unsigned int PromptNewAddress(string prompt)
{
unsigned int newaddr = 0x10000;
while (newaddr > 0xFFFF) {
cout << prompt;
cin >> hex >> newaddr;
}
return newaddr;
}
/*
*--------------------------------------------------------------------
* Thank you stackoverflow.com.
* http://stackoverflow.com/questions/111928/
* is-there-a-printf-converter-to-print-in-binary-format
*--------------------------------------------------------------------
*/
#define BYTETOBINARYPATTERN "%d%d%d%d%d%d%d%d"
#define BYTETOBINARY(byte) \
(byte & 0x80 ? 1 : 0), \
(byte & 0x40 ? 1 : 0), \
(byte & 0x20 ? 1 : 0), \
(byte & 0x10 ? 1 : 0), \
(byte & 0x08 ? 1 : 0), \
(byte & 0x04 ? 1 : 0), \
(byte & 0x02 ? 1 : 0), \
(byte & 0x01 ? 1 : 0)
/*
*--------------------------------------------------------------------
* Method: ShowRegs()
* Purpose: Display status of CPU registers on DOS console.
* Arguments: preg - pointer to registers structure
* pvm - pointer to VM
* ioaddr - address setup for char I/O emulation
* ioecho - local I/O echo flag
* showiostat - if true, I/O emulation status is shown
* Returns: boolean - true if the stack pointer was longer than
* 15 (the screen must be cleared).
*--------------------------------------------------------------------
*/
bool ShowRegs(Regs *preg, VMachine *pvm, bool ioecho, bool showiostat)
{
bool ret = false;
char sBuf[80] = {0};
sprintf(sBuf, "| PC: $%04x | Acc: $%02x (" BYTETOBINARYPATTERN
") | X: $%02x | Y: $%02x |",
preg->PtrAddr, preg->Acc, BYTETOBINARY(preg->Acc),
preg->IndX, preg->IndY);
cout << "*-------------*-----------------------*----------*----------*";
cout << endl;
cout << sBuf << endl;
cout << "*-------------*-----------------------*----------*----------*";
cout << endl;
cout << "| NV-BDIZC |";
cout << " : " << diss_buf << " " << endl;
cout << "| " << bitset<8>((int)preg->Flags) << " |";
cout << " : " << curr_buf << " " << endl;
cout << "*-------------*" << endl;
cout << endl;
cout << "Stack: $" << hex << (unsigned short)preg->PtrStack << " " << endl;
cout << " ";
cout << " \r";
// display stack contents
cout << " [";
int j = 0, stacklines = 1;
for (unsigned int addr = 0x0101 + preg->PtrStack; addr < 0x0200; addr++) {
unsigned int hv = (unsigned int)pvm->MemPeek8bit(addr);
if (hv < 16) {
cout << 0;
}
cout << hex << hv << " ";
j++;
if (j > 15) {
cout << "]" << endl;
cout << " [";
j=0;
stacklines++;
}
}
cout << "] " << endl;
ret = (stacklines < g_stackdisp_lines);
g_stackdisp_lines = stacklines;
// end display stack contents
if (showiostat) {
cout << endl << "I/O status: ";
cout << (pvm->GetCharIOActive() ? "enabled" : "disabled") << ", ";
cout << " at: $" << hex << pvm->GetCharIOAddr() << ", ";
cout << " local echo: " << (ioecho ? "ON" : "OFF") << "." << endl;
cout << "Graphics status: ";
cout << (pvm->GetGraphDispActive() ? "enabled" : "disabled") << ", ";
cout << " at: $" << hex << pvm->GetGraphDispAddr() << endl;
cout << "ROM: ";
cout << ((pvm->IsROMEnabled()) ? "enabled." : "disabled.") << " ";
cout << "Range: $" << hex << pvm->GetROMBegin() << " - $";
cout << hex << pvm->GetROMEnd() << "." << endl;
cout << "Op-code execute history: ";
cout << (pvm->IsExecHistoryActive() ? "enabled" : "disabled");
cout << "." << endl;
}
cout << " \r";
return ret;
}
/*
*--------------------------------------------------------------------
* Method: ShowMenu()
* Purpose: Print available commands on the console.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void ShowMenu()
{
cout << "------------------------------------+----------------------------------------" << endl;
cout << " C - continue, S - step | A - set address for next step" << endl;
cout << " G - go/cont. from new address | N - go number of steps, P - IRQ" << endl;
cout << " I - toggle char I/O emulation | X - execute from new address" << endl;
cout << " T - show I/O console | B - blank (clear) screen" << endl;
cout << " E - toggle I/O local echo | F - toggle registers animation" << endl;
cout << " J - set animation delay | M - dump memory, W - write memory" << endl;
cout << " K - toggle ROM emulation | R - show registers, Y - snapshot" << endl;
cout << " L - load memory image | O - display op-code exec. history" << endl;
cout << " D - disassemble code in memory | Q - quit, 0 - reset, H - help" << endl;
cout << " V - toggle graphics emulation | U - enable/disable exec. history" << endl;
cout << " Z - enable/disable debug traces | 1 - enable/disable perf. stats" << endl;
cout << " 2 - display debug traces | ? - show this menu" << endl;
cout << "------------------------------------+----------------------------------------" << endl;
}
/*
*--------------------------------------------------------------------
* Method: RunSteps()
* Purpose: Execute multiple steps of CPU emulation.
* Arguments:
* step - boolean flag, true if step by step mode
* nsteps - # if steps
* brk - current status of break flag
* preg - pointer to CPU registers
* stct - step counter
* pvm - pointer to VM
* lrts - status of last RTS flag
* anim - boolean flag, true - registers animation mode
* delay - delay for anim mode
*
* Returns: n/a
*--------------------------------------------------------------------
*/
inline void RunSteps(bool step,
int nsteps,
bool brk,
Regs *preg,
int stct,
VMachine *pvm,
bool lrts,
bool anim,
int delay)
{
bool cls = false;
brk = preg->SoftIrq;
lrts = preg->LastRTS;
while(step && nsteps > 1 && !brk && !lrts && !opbrk) {
preg = RunSingleCurrInstr();
cout << "addr: $" << hex << preg->PtrAddr << ", step: " << dec << stct;
cout << " \r";
if (anim) {
if (cls & ClsIfDirty) { pvm->ClearScreen(); cls = false; }
pvm->ScrHome();
cls = ShowRegs(preg,pvm,false,false);
cout << endl;
this_thread::sleep_for(chrono::milliseconds(delay));
}
brk = preg->SoftIrq;
lrts = preg->LastRTS;
nsteps--;
stct++;
}
}
/*
*--------------------------------------------------------------------
* Method: ShowSpeedStats()
* Purpose:
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void ShowSpeedStats()
{
if (pvm->IsPerfStatsActive()) {
cout << endl;
cout << dec;
cout << "CPU emulation speed stats: " << endl;
cout << "|-> Average speed based on 1MHz CPU: " << pvm->GetPerfStats().perf_onemhz << " %" << endl;
cout << "|-> Last measured # of cycles exec.: " << pvm->GetPerfStats().prev_cycles << endl;
cout << "|-> Last measured time of execution: " << pvm->GetPerfStats().prev_usec << " usec" << endl;
cout << endl;
} else {
cout << endl;
cout << "Emulation performance stats is OFF." << endl;
cout << endl;
}
}
/*
*--------------------------------------------------------------------
* Method: ExecHistory()
* Purpose: Display history of executed VM65 code in assembly
* mnemonics format.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void ExecHistory()
{
if (pvm->IsExecHistoryActive()) {
queue<string> exechist(pvm->GetExecHistory());
cout << "PC : INSTR ACC | X | Y | PS | SP";
cout << endl;
cout << "------------------------------------+-----+-----+-----+-----";
cout << endl;
while (exechist.size()) {
cout << exechist.front() << endl;
exechist.pop();
}
} else {
cout << "Sorry. Op-code execute history is currently disabled." << endl;
}
}
/*
*--------------------------------------------------------------------
* Method: LoadImage()
* Purpose: Load memory image from file. Set new execute address.
* Arguments: newaddr - current execute address
* Returns: unsigned int - new execute address
*--------------------------------------------------------------------
*/
unsigned int LoadImage(unsigned int newaddr)
{
char typ = 0;
for (char c = tolower(typ);
c != 'a' && c != 'b' && c != 'h' && c != 'd';
c = tolower(typ)) {
cout << "Type (A - auto/B - binary/H - Intel HEX/D - definition): ";
cin >> typ;
}
cout << " [";
switch (tolower(typ)) {
case 'a': cout << "auto"; break;
case 'b': cout << "binary"; break;
case 'h': cout << "Intel HEX"; break;
case 'd': cout << "definition"; break;
default: break; // should never happen
}
cout << "]" << endl;
string name;
cout << "Memory Image File Name: ";
cin >> name;
cout << " [" << name << "]" << endl;
if (typ == 'b') PrintVMErr (pvm->LoadRAMBin(name));
else if (typ == 'h') PrintVMErr (pvm->LoadRAMHex(name));
else if (typ == 'd') {
PrintVMErr (pvm->LoadRAMDef(name));
if (pvm->IsAutoExec()) execvm = true;
if (newaddr == 0) newaddr = 0x10000;
}
else { // automatic file format detection
pvm->LoadRAM(name);
if (pvm->IsAutoExec()) execvm = true;
if (newaddr == 0) newaddr = 0x10000;
}
PrintVMErr(pvm->GetLastError());
return newaddr;
}
/*
*--------------------------------------------------------------------
* Method: ToggleIO()
* Purpose:
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
unsigned int ToggleIO(unsigned int ioaddr)
{
if (pvm->GetCharIOActive()) {
pvm->DisableCharIO();
cout << "I/O deactivated." << endl;
} else {
ioaddr = PromptNewAddress(PROMPT_ADDR);
cout << " [" << hex << ioaddr << "]" << endl;
pvm->SetCharIO(ioaddr, ioecho);
cout << "I/O activated." << endl;
}
return ioaddr;
}
/*
*--------------------------------------------------------------------
* Method: ToggleGrDisp()
* Purpose:
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
unsigned int ToggleGrDisp(unsigned int graddr)
{
if (pvm->GetGraphDispActive()) {
pvm->DisableGraphDisp();
cout << "Graphics display deactivated." << endl;
} else {
graddr = PromptNewAddress(PROMPT_ADDR);
cout << " [" << hex << graddr << "]" << endl;
pvm->SetGraphDisp(graddr);
cout << "Graphics display activated." << endl;
}
return graddr;
}
/*
*--------------------------------------------------------------------
* Method: WriteToMemory()
* Purpose: Take user input and write to memory.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void WriteToMemory()
{
unsigned int tmpaddr = PromptNewAddress(PROMPT_ADDR);
cout << " [" << hex << tmpaddr << "]" << endl;
cout << "Enter hex bytes [00..FF] values separated with NL or spaces, end with [100]:" << endl;
unsigned short v = 0;
while (true) {
cin >> hex >> v;
cout << " " << hex << v;
if (v > 0xFF) break;
pvm->MemPoke8bit(tmpaddr++, v & 0xFF);
};
cout << endl;
}
/*
*--------------------------------------------------------------------
* Method: DisassembleMemory()
* Purpose: Disassemble machine code in memory to symbolic format.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void DisassembleMemory()
{
unsigned int addrbeg = 0x10000, addrend = 0x10000;
cout << PROMPT_RANGE_ADDR << endl;
addrbeg = PromptNewAddress(PROMPT_START_ADDR);
cout << " [" << hex << addrbeg << "]" << endl;
addrend = PromptNewAddress(PROMPT_END_ADDR);
cout << " [" << hex << addrend << "]" << endl;
cout << endl;
for (unsigned int addr = addrbeg; addr <= addrend;) {
char instrbuf[DISS_BUF_SIZE];
addr = pvm->Disassemble((unsigned short)addr, instrbuf);
cout << instrbuf << endl;
}
}
/*
*--------------------------------------------------------------------
* Method: DumpMemory()
* Purpose: Display contents of memory, range entered by user.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void DumpMemory()
{
unsigned int addrbeg = 0x10000, addrend = 0x10000;
cout << PROMPT_RANGE_ADDR << endl;
addrbeg = PromptNewAddress(PROMPT_START_ADDR);
cout << " [" << hex << addrbeg << "]" << endl;
addrend = PromptNewAddress(PROMPT_END_ADDR);
cout << " [" << hex << addrend << "]" << endl;
cout << endl;
for (unsigned int addr = addrbeg; addr <= addrend; addr+=16) {
cout << "\t|";
for (unsigned int j=0; j < 16; j++) {
unsigned int hv = (unsigned int)pvm->MemPeek8bit(addr+j);
if (hv < 16) {
cout << 0;
}
cout << hex << hv << " ";
}
cout << "|";
for (int j=0; j < 16; j++) {
char cc = (char)pvm->MemPeek8bit(addr+j);
if (isprint(cc))
cout << cc;
else
cout << "?";
}
cout << '\r';
cout << hex << addr;
cout << endl;
}
}
/*
*--------------------------------------------------------------------
* Method: ToggleDebugTraces()
* Purpose: Enable/disable debug traces.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void ToggleDebugTraces()
{
if (pvm->IsDebugTraceActive()) {
pvm->DisableDebugTrace();
cout << "Debug traces disabled." << endl;
} else {
pvm->EnableDebugTrace();
cout << "Debug traces enabled." << endl;
}
}
/*
*--------------------------------------------------------------------
* Macro: SCRDIV_xxCOL
* Purpose: Print line out of xx '-' signs, no NL.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
#define SCRDIV_20COL cout << "--------------------";
#define SCRDIV_19COL cout << "-------------------";
#define SCRDIV_79COL SCRDIV_20COL; SCRDIV_20COL; SCRDIV_20COL; SCRDIV_19COL;
/*
*--------------------------------------------------------------------
* Method: DebugTraces()
* Purpose: Show debug traces.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void DebugTraces()
{
if (pvm->IsDebugTraceActive()) {
queue<string> dbgtrc(pvm->GetDebugTraces());
cout << "Time [usec] : Message" << endl;
SCRDIV_79COL; cout << endl;
int n=0;
while (dbgtrc.size()) {
cout << dbgtrc.front() << endl;
dbgtrc.pop();
if (n++ == 20) {
n = 0;
cout << endl;
PressEnter2Cont("Press [ENTER] for more...");
cout << endl;
}
}
SCRDIV_79COL; cout << endl;
} else {
cout << "Sorry. Debug traces are currently disabled." << endl;
}
}
/*
*--------------------------------------------------------------------
* Method: TogglePerfStats()
* Purpose: Enable/disable performance stats.
* Arguments:
* Returns:
*--------------------------------------------------------------------
*/
void TogglePerfStats()
{
if (pvm->IsPerfStatsActive()) {
pvm->DisablePerfStats();
cout << "Performance stats were disabled." << endl;
} else {
pvm->EnablePerfStats();
cout << "Performance stats were enabled." << endl;
}
}
/*
*--------------------------------------------------------------------
* Method: LoadArgs()
* Purpose: Parse command line arguments.
* Arguments: int argc, char *argv[], standard C command line args.
* Returns: n/a
*--------------------------------------------------------------------
*/
void LoadArgs(int argc, char *argv[])
{
for (int i=1; i<argc; i++) {
if (!strcmp(argv[i], "-r")) {
reset = true;
execvm = true;
} else if (!strcmp(argv[i], "-b")) {
loadbin = true;
} else if (!strcmp(argv[i], "-x")) {
loadhex = true;
} else if (!strcmp(argv[i], "-h")) {
needhelp = true;
} else {
ramfile = argv[i];
}
}
}
/************ corrected in makefile
// Quick and dirty SDL2 workaround to 'undefined reference to WinMain'
#ifdef main
#undef main
#endif
*****************/
/*
*--------------------------------------------------------------------
* Method: main()
* Purpose: Application entry point/main loop.
* Arguments: int argc, char *argv[], standard C command line args.
* Returns: int - general principle is to return 0 if OK, non-zero
* otherwise
*--------------------------------------------------------------------
*/
int main(int argc, char *argv[]) {
#if defined(LINUX)
signal(SIGINT, trap_signal);
signal(SIGTERM, trap_signal);
if (atexit(reset_terminal_mode)) {
cout << "WARNING: Can't set exit function." << endl;
PressEnter2Cont("");
}
#endif
#if defined(WINDOWS)
SetConsoleCtrlHandler( (PHANDLER_ROUTINE) CtrlHandler, TRUE );
#endif
pconio = new ConsoleIO();
if (NULL == pconio) throw MKGenException("Out of memory - ConsoleIO");
pconio->InitCursesScr();
pconio->CloseCursesScr();
string romfile("dummy.rom");
LoadArgs(argc, argv);
if (needhelp) { CmdArgHelp(argv[0]); exit(0); }
if (loadbin && loadhex) {
cout << "ERROR: Can't load both formats at the same time." << endl;
exit(-1);
}
try {
cout << endl;
if (loadbin) {
pvm = new VMachine(romfile, "dummy.ram");
if (NULL != pvm) {
PrintVMErr (pvm->LoadRAMBin(ramfile));
if (!reset) { reset = execvm = pvm->IsAutoReset(); }
}
} else if (loadhex) {
pvm = new VMachine(romfile, "dummy.ram");
if (NULL != pvm) PrintVMErr (pvm->LoadRAMHex(ramfile));
}
else {
pvm = new VMachine(romfile, ramfile);
if (NULL != pvm) PrintVMErr(pvm->GetLastError());
if (NULL != pvm && !reset) { reset = execvm = pvm->IsAutoReset(); }
}
if (NULL == pvm) {
throw MKGenException("Out of memory - VMachine");
}
pvm->ClearScreen();
CopyrightBanner();
string cmd;
bool runvm = false, step = false, brk = false, execaddr = false, stop = true;
bool lrts = false, anim = false, enrom = pvm->IsROMEnabled(), show_menu = true;
unsigned int newaddr = pvm->GetRunAddr(), ioaddr = pvm->GetCharIOAddr();
unsigned int graddr = pvm->GetGraphDispAddr();
unsigned int rombegin = pvm->GetROMBegin(), romend = pvm->GetROMEnd(), delay = ANIM_DELAY;
int nsteps = 0;
if (pvm->IsAutoExec()) {
execvm = true;
}
if (newaddr == 0) newaddr = 0x10000;
bool bloop = true;
while (bloop) {
preg = pvm->GetRegs();
if (runvm) {
if (anim) pvm->ClearScreen();
int stct = 1;
if (execaddr) {
preg = ((step) ? RunSingleInstr(newaddr) : pvm->Run(newaddr));
RunSteps(step,nsteps,brk,preg,stct,pvm,lrts,anim,delay);
execaddr = false;
} else {
preg = ((step) ? RunSingleCurrInstr() : pvm->Run());
RunSteps(step,nsteps,brk,preg,stct,pvm,lrts,anim,delay);
}
pconio->InitCursesScr();
pconio->CloseCursesScr();
if (step)
cout << "\rExecuted " << dec << stct << ((stct == 1) ? " step." : " steps.") << " " << endl;
nsteps = 0;
runvm = step = false;
newaddr = 0x10000;
} else if (execvm) {
if (reset) {
pvm->Reset();
preg = pvm->GetRegs();
reset = false;
} else {
preg = (execaddr ? pvm->Exec(newaddr) : pvm->Exec());
}
execvm = false;
execaddr = false;
brk = preg->SoftIrq;
lrts = preg->LastRTS;
newaddr = 0x10000;
}
pconio->InitCursesScr();
pconio->CloseCursesScr();
if (brk || opbrk || stop || lrts) {
pvm->ClearScreen();
pvm->ShowIO();
cout << endl;
if (opbrk) {
cout << "Interrupted at " << hex << preg->PtrAddr << endl;
} else if (brk) {
cout << "BRK at " << hex << preg->PtrAddr << endl;
} else if (lrts) {
cout << "FINISHED at " << hex << ((newaddr > 0xFFFF) ? preg->PtrAddr : newaddr) << endl;
} else if (stop) {
cout << "STOPPED at " << hex << ((newaddr > 0xFFFF) ? preg->PtrAddr : newaddr) << endl;
}
ShowSpeedStats();
opbrk = brk = stop = lrts = false;
pvm->SetOpInterrupt(false);
ShowRegs(preg,pvm,ioecho,true);
show_menu = true;
}
if (show_menu) {
ShowMenu();
show_menu = false;
} else {
cout << endl;
cout << "Type '?' and press [ENTER] for Menu ..." << endl;
cout << endl;
}
cout << "> ";
cin >> cmd;
char c = tolower(cmd.c_str()[0]);
// Interpret and execute user input / commands.
switch (c) {
case '?': show_menu = true;
break;
// display help
case 'h': ShowHelp();