class CoCoRaakaTu:
GAME_NAME = 'coco_raaka_tu'
NUM_COLUMNS = 32
@staticmethod
def print_banner():
print('Raaka-Tu - 1982 for the TRS-80 Color Computer')
print(
'See the disassembly: http://computerarcheology.com/CoCo/RaakaTu/')
print(
'Everything you need to know: http://www.figmentfly.com/raakatu/raakatu.html'
)
def __init__(self, cols=NUM_COLUMNS):
logging.getLogger('MC6809').disabled = True
fn = os.path.join(os.path.dirname(__file__), 'coco_raaka_tu.bin')
with open(fn, 'rb') as f:
self.binary = f.read()
self.binary = list(b'\x00' * 0x600 + self.binary)
CFG_DICT = {
"verbosity": None,
"trace": None,
}
class Config(BaseConfig):
RAM_START = 0x0000
RAM_END = 0x7FFF
ROM_START = 0x8000
ROM_END = 0xFFFF
cfg = Config(CFG_DICT)
# Memory management -- defer everything to our read/write functions
#
memory = Memory(cfg)
memory.add_read_byte_callback(self.read_memory, 0, 0xFFFF)
memory.add_write_byte_callback(self.write_memory, 0, 0xFFFF)
# Start of program is 0x600
#
self.cpu = CPU(memory, cfg)
self.still_running = False
self.buffer = ''
self.cols = cols
def print_char(self, c):
if c == '\r' or c == '\n':
self.print_flush()
else:
self.buffer = self.buffer + c
def print_flush(self):
while True:
self.buffer = self.buffer.strip()
if len(self.buffer) <= self.cols:
print(self.buffer)
self.buffer = ''
return
if self.buffer[self.cols] == ' ':
print(self.buffer[0:self.cols])
self.buffer = self.buffer[self.cols:]
else:
i = self.buffer[0:self.cols].rfind(' ')
if i < 0:
i = self.cols
print(self.buffer[:i])
self.buffer = self.buffer[i:]
def show_error_message(self):
'''Instead of flashing in place
'''
s = ''
for y in range(32):
c = self.binary[0x5E0 + y]
if c < 32 or c > 127 or c == 96:
c = 32
s = s + chr(c)
print(s.strip())
def simulate_coco_input(self):
'''Get input from the user and poke it into COCO screen memory
'''
for y in range(32):
self.binary[0x5E0 + y] = 96
user_input = input('> ')
user_input = user_input.strip().upper()
p = 0x5E0 # Start of the bottom row
for c in user_input:
c = ord(c)
if c == 32:
self.binary[p] = 96
p += 1
elif c >= 65 and c <= 90:
self.binary[p] = c
p += 1
if p >= 0x5FF:
break
#for p in range(0x5E0,0x5E0+32):
# print(self.binary[p])
def simulate_coco_print(self, s):
'''Print a character
'''
#print('##',s)
self.print_char(s)
def read_memory(self, _cycles, frm, addr):
# This is the "print character routine. We point it to C000 then handle the
# print by intercepting the routine at C000.
#
if addr == 0xA002:
return 0xC0
if addr == 0xA003:
return 0x00
if addr == 0xC000:
self.simulate_coco_print(chr(self.cpu.accu_a.value))
return 0x39
# The wait-for-key calls this routine to roll the random number. Since we
# are eating that spin-wait, we'll provide random numbers here.
#
if addr == 0x12A8:
self.binary[0x1338] = random.randint(0, 255)
self.cpu.accu_a.set(random.randint(0, 255))
return 0x39
# This bypasses the built in 32-column management. We'll handle word-breaks in
# the print routine, which allows for any size console.
#
if addr == 0x89:
return 0
# This is where the error message is flashed. Instead, we'll just print the error.
#
if addr == 0x9A5:
self.show_error_message()
if addr == 0x9BB:
return 0x21 # BRN to avoid a loop of flashes
# This is where the game gets a line of input from the user.
#
if addr == 0xACC or addr == 0xA63:
self.simulate_coco_input()
return 0x39
# This is the infinite loop when the player does a QUIT.
# We'll abort the running program
#
if addr == 0x10B5:
self.still_running = False
return 0x20
# This is in RAM.
#
if addr <= 0x3F17:
# print('.. '+hex(addr)+' @'+hex(frm)+' <'+hex(self.binary[addr]))
return self.binary[addr]
raise Exception('## UNHANDLED READ from=' + hex(frm) +
' destination=' + hex(addr))
def write_memory(self, _cycles, frm, addr, value):
# This is RAM.
#
if addr <= 0x3F17:
self.binary[addr] = value
return
raise Exception('## UNHANDLED WRITE from' + hex(frm) +
' destination=' + hex(addr) + ' value=' + hex(value))
def run_forever(self):
self.cpu.program_counter.set(0x600)
self.still_running = True
while self.still_running:
self.cpu.run()
return 0
else:
print('Code at {:04X} read {:02X}'.format(b, addr))
memory = Memory(cfg)
# The CoCo ROM will "accidentally" write to FFFF. Just ignore that as the hardware does.
memory.add_write_byte_callback(lambda a, b, c, d: 0, 0xFFFF, 0xFFFF)
memory.add_write_byte_callback(write_PIA, 0xFF00, 0xFFF0)
memory.add_read_byte_callback(read_PIA, 0xFF00, 0xFFF0)
with open('bas12.rom', 'rb') as f:
basic_rom = f.read()
memory.load(0xA000, basic_rom)
memory.load(0xFFF0, basic_rom[-16:])
with open('extbas11.rom', 'rb') as f:
ext_rom = f.read()
memory.load(0x8000, ext_rom)
cpu = CPU(memory, cfg)
cpu.reset()
print(cpu.program_counter)
#print(memory.read_byte(0xFFFF ))
while True:
cpu.run()
cpu.irq()
print(cpu.get_state())