def __init__(self, romFilePath):
self.sim6507 = Sim6502()
self.simTIA = SimTIA()
self.emuPIA = EmuPIA()
self.rom = array('B', [0] * 4096)
self.bankSwitchROMOffset = 0
self.programLen = 0
self.loadProgram(romFilePath)
self.sim6507.resetChip()
# The 6507's IRQ and NMI are connected to the supply voltage
# Setting them to 'pulled high' will keep them high.
self.sim6507.setPulledHigh(self.sim6507.getWireIndex('IRQ'))
self.sim6507.setPulledHigh(self.sim6507.getWireIndex('NMI'))
self.sim6507.recalcWireNameList(['IRQ', 'NMI'])
# TIA CS1 is always high. !CS2 is always grounded
self.simTIA.setPulledHigh(self.simTIA.getWireIndex('CS1'))
self.simTIA.setPulledLow(self.simTIA.getWireIndex('CS2'))
self.simTIA.recalcWireNameList(['CS1','CS2'])
# We're running an Atari 2600 program, so set memory locations
# for the console's switches and joystick state.
# Console switches:
# d3 set to 1 for color (vs B&W),
# d1 select set to 1 for 'switch not pressed'
# d0 set to 1 switch
self.writeMemory(0x0282, 0x0B, True)
# No joystick motion
# joystick trigger buttons read on bit 7 of INPT4 and INPT5 of TIA
self.writeMemory(0x0280, 0xFF, True)
