Coverage for MC6809/components/cpu6809.py: 76%

1#!/usr/bin/env python 

2 

3""" 

4 MC6809 - 6809 CPU emulator in Python 

5 ======================================= 

6 

7 6809 is Big-Endian 

8 

9 Links: 

10 http://dragondata.worldofdragon.org/Publications/inside-dragon.htm 

11 http://www.burgins.com/m6809.html 

12 http://koti.mbnet.fi/~atjs/mc6809/ 

13 

14 :copyleft: 2013-2015 by the MC6809 team, see AUTHORS for more details. 

15 :license: GNU GPL v3 or above, see LICENSE for more details. 

16 

17 Based on: 

18 * ApplyPy by James Tauber (MIT license) 

19 * XRoar emulator by Ciaran Anscomb (GPL license) 

20 more info, see README 

21""" 

22 

23 

24import logging 

25 

26from MC6809.components.mc6809_addressing import AddressingMixin 

27from MC6809.components.mc6809_base import CPUBase 

28from MC6809.components.mc6809_cc_register import CPUConditionCodeRegisterMixin 

29from MC6809.components.mc6809_interrupt import InterruptMixin 

30from MC6809.components.mc6809_ops_branches import OpsBranchesMixin 

31from MC6809.components.mc6809_ops_load_store import OpsLoadStoreMixin 

32from MC6809.components.mc6809_ops_logic import OpsLogicalMixin 

33from MC6809.components.mc6809_ops_test import OpsTestMixin 

34from MC6809.components.mc6809_speedlimited import CPUSpeedLimitMixin 

35from MC6809.components.mc6809_stack import StackMixin 

36from MC6809.components.mc6809_tools import CPUThreadedStatusMixin, CPUTypeAssertMixin 

37from MC6809.core.cpu_control_server import CPUControlServerMixin 

38 

39 

40log = logging.getLogger("MC6809") 

41 

42 

43# HTML_TRACE = True 

44HTML_TRACE = False 

45 

46 

47class CPU(CPUBase, AddressingMixin, StackMixin, InterruptMixin, OpsLoadStoreMixin, OpsBranchesMixin, 

48 OpsTestMixin, OpsLogicalMixin, CPUConditionCodeRegisterMixin, CPUThreadedStatusMixin): 

49 

50 def to_speed_limit(self): 

51 return change_cpu(self, CPUSpeedLimit) 

52 

53 

54class CPUSpeedLimit(CPUSpeedLimitMixin, CPU): 

55 

56 def to_normal(self): 

57 return change_cpu(self, CPU) 

58 

59 

60class CPUTypeAssert(CPUTypeAssertMixin, CPU): 

61 pass 

62 

63 

64class CPUControlServer(CPUControlServerMixin, CPU): 

65 pass 

66 

67 

68def change_cpu(old_cpu, NewCPU): 

69 old_cpu.running = False 

70 cpu_state = old_cpu.get_state() 

71 

72 new_cpu = NewCPU(memory=old_cpu.memory, cfg=old_cpu.cfg) 

73 new_cpu.set_state(cpu_state) 

74 

75 log.critical("Change CPU from %r to %r", 

76 old_cpu.__class__.__name__, 

77 new_cpu.__class__.__name__ 

78 ) 

79 

80 return new_cpu