def dobody(f, count):
mymem = mem.Mem()
numwords = count
while True:
ldaddr = readword(f)
if ldaddr & 0x8000:
break
csum = 0
while numwords > 0:
word = readword(f)
csum += word
if csum > 0xffff:
csum += 1
csum = csum & 0xffff
mymem.add(ldaddr, word)
(op, fld) = disasmdata.disasmdata(word)
mymem.putOp(ldaddr, op)
mymem.putFld(ldaddr, fld)
ldaddr += 1
numwords -= 1
checksum = readword(f)
if csum != checksum:
print "Checksum error"
#sys.exit(20)
numwords = skipzeros(f)
return mymem
def dobody(f, mymem, save):
"""Read all of file after block loader.
f input file handle
mymem the mem.Mem() dict to store data in
save True if body code is to be saved in 'mymem'
Returns an updated mem.Mem() object containing the input code
and a start address: (mem, start, ac).
If a start address is not specified, 'start' and 'ac' are both None.
If there was a checksum error, just return None.
"""
if not save:
return (mymem, None, None)
start_address = None
while True:
# negative load address is end-of-file
ldaddr = readword(f)
if ldaddr & 0x8000:
break
# read data block, calculating checksum
csum = ldaddr # start checksum with base address
count = pyword(readword(f))
neg_count = pyword(count)
csum = (csum + count) & 0xffff # add neg word count
csum_word = readword(f)
csum = (csum + csum_word) & 0xffff # add checksum word
while neg_count < 0:
word = readword(f)
csum = (csum + word) & 0xffff
mymem.add(ldaddr, word)
(op, fld) = disasmdata.disasmdata(word)
mymem.putOp(ldaddr, op)
mymem.putFld(ldaddr, fld)
ldaddr += 1
neg_count += 1
csum &= 0xffff
if csum != 0:
wx.MessageBox('Checksum error, got %06o, expected 0' % csum, 'Warning', wx.OK | wx.ICON_WARNING)
# check for real start address
if ldaddr != 0177777:
# actual start address
ac = readword(f)
return (mymem, ldaddr & 0x7ffff, ac)
return (mymem, None, None)
def process(mem, addr, cycle):
code = mem.getCode(addr)
(op, fld) = disasmdata.disasmdata(code)
mem.putOp(addr, op)
mem.putFld(addr, fld)
mem.putCycle(addr, cycle)
