def execute_once():
if traceend is None:
if MainCPU.PC == tracestart:
Trace.settrace(True)
else:
Trace.settrace(MainCPU.PC >= tracestart and MainCPU.PC <= traceend)
if DisplayCPU.ison():
Trace.trace('%6.6o' % DisplayCPU.DPC)
Trace.trace('\t')
instruction_cycles = DisplayCPU.execute_one_instruction()
Trace.trace('%6.6o\t' % MainCPU.PC)
instruction_cycles += MainCPU.execute_one_instruction()
Trace.itraceend(DisplayCPU.ison())
__tick_all(instruction_cycles)
if not DisplayCPU.ison() and not MainCPU.running:
return 0
return instruction_cycles
def init(run_address, tracefile, tstart, tend, boot_rom=None, corefile=None):
global tracestart, traceend
Memory.init(boot_rom, corefile)
Trace.init(tracefile)
tracestart = tstart
traceend = tend
DisplayCPU.init()
MainCPU.init()
def i_DSN():
global PC
if not DisplayCPU.ison():
PC = (PC + 1) & WORDMASK
Trace.itrace('DSN')
return 1
def i_DON(indirect, address, instruction):
DisplayCPU.DRSindex = 0
DisplayCPU.start()
Trace.itrace('DON')
return 1
def i_DOF(indirect, address, instruction):
DisplayCPU.stop()
Trace.itrace('DOF')
return 1