/** OnRandomizeAndLoad
*
* Randomizes memory and loads a file
*/
void ComplxFrame::OnRandomizeAndLoad(wxCommandEvent& event)
{
if (Running()) return;
wxFileDialog* dialog = new wxFileDialog(NULL, _("Load .asm file"), wxEmptyString, wxEmptyString, _("LC-3 Assembly Files (*.asm)|*.asm"), wxFD_OPEN|wxFD_FILE_MUST_EXIST|wxFD_CHANGE_DIR);
if (dialog->ShowModal() == wxID_OK)
{
wxFileName filename(dialog->GetPath());
OnInit();
lc3_randomize(state);
DoLoadFile(filename);
}
}
/** OnRandomizeAndReload
*
* Called when the user wants to reload the last file.
*/
void ComplxFrame::OnRandomizeAndReload(wxCommandEvent& event)
{
if (Running()) return;
if (currentFile.GetFullName().IsEmpty())
{
OnLoad(event);
return;
}
OnInit();
lc3_randomize(state);
DoLoadFile(currentFile);
}
/** lc3_init
*
* Initializes the state of the lc3
*
* @param state An LC3 state
* @param randomize_registers if true randomizes registers
* @param randomize_memory if true randomizes memory
* @param fill_value ignored if randomize_XXX is true otherwise sets registers/memory to this value (except R7).
*/
void lc3_init(lc3_state& state, bool randomize_registers, bool randomize_memory, short fill_value)
{
// Set Registers
state.regs[0] = randomize_registers ? lc3_random() : fill_value;
state.regs[1] = randomize_registers ? lc3_random() : fill_value;
state.regs[2] = randomize_registers ? lc3_random() : fill_value;
state.regs[3] = randomize_registers ? lc3_random() : fill_value;
state.regs[4] = randomize_registers ? lc3_random() : fill_value;
state.regs[5] = randomize_registers ? lc3_random() : fill_value;
state.regs[6] = randomize_registers ? lc3_random() : fill_value;
state.regs[7] = randomize_registers ? lc3_random() : 0x490;
// PC is initially at address 3000
state.pc = 0x3000;
// User mode
state.privilege = 1;
state.priority = 0;
// Set Control Flags
state.n = 0;
state.z = 1;
state.p = 0;
// Set Additional Flags
state.halted = 0;
state.true_traps = 0;
state.warnings = 0;
state.executions = 0;
state.interrupt_enabled = 0;
// Clear subroutine info
state.max_call_stack_size = -1;
state.call_stack.clear();
// Set Stack Flags
state.max_stack_size = -1;
state.undo_stack.clear();
// Set I/O Stuff
state.input = &std::cin;
state.reader = lc3_read_char;
state.peek = lc3_peek_char;
state.output = &std::cout;
state.writer = lc3_do_write_char;
state.warning = &std::cout;
// Clear memory
if (randomize_memory)
{
lc3_randomize(state);
}
else
{
for (unsigned int i = 0; i < 65536; i++)
state.mem[i] = fill_value;
}
// Add LC3 OS
memcpy(state.mem, lc3_os, LC3_OS_SIZE * sizeof(unsigned short));
// Clear plugins
lc3_remove_plugins(state);
// Clear Symbol Table
state.symbols.clear();
state.rev_symbols.clear();
// Clear Breakpoints and all that jazz
state.breakpoints.clear();
state.blackboxes.clear();
state.comments.clear();
state.reg_watchpoints.clear();
state.mem_watchpoints.clear();
state.subroutines.clear();
// Clear pending interrupts
state.interrupts.clear();
state.interrupt_test.clear();
state.interrupt_vector = -1;
state.savedssp = 0x3000;
state.savedusp = 0xF000;
state.memory_ops.clear();
state.total_reads = 0;
state.total_writes = 0;
state.in_lc3test = false;
}