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annotate analyze_olp.py @ 724:2174f92c5f9b

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Fix bug in vdp_next_hint that was causing HINTs to fire repeatedly when they should not have fired at all based on an HINT interval that was larger than the number of active lines in the display
author Michael Pavone <pavone@retrodev.com>
date Fri, 22 May 2015 18:38:44 -0700
parents be9c7b3e25ee
children b290343e5664
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1 #!/usr/bin/env python
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2
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3 from zipfile import ZipFile
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4 from sys import exit, argv
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5
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6 def detect_rise(last, sample, bit):
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7 mask = 1 << bit
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8 return (not last & mask) and (sample & mask)
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9
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10 def detect_fall(last, sample, bit):
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11 mask = 1 << bit
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12 return (last & mask) and (not sample & mask)
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13
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14 def detect_high(sample, bit):
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15 mask = 1 << bit
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16 return sample & mask
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17
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18 def detect_low(sample, bit):
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19 mask = 1 << bit
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20 return not sample & mask
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21
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22 def analyze_delays(chanmap, datafile):
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23 m68k_clk = chanmap['M68K CLK']
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24 m_as = chanmap['!AS']
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25 last = False
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26 clks = 0
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27 as_start = 0
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28 for line in datafile.readlines():
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29 line = line.strip()
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30 if line and not line.startswith(';'):
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31 sample,_,num = line.partition('@')
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32 sample = int(sample, 16)
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33 if not (last is False):
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34 if detect_rise(last, sample, m68k_clk):
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35 clks = clks + 1
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36 if detect_rise(last, sample, m_as):
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37 as_clks = clks - as_start
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38 if as_clks > 2:
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39 print '!AS held for', as_clks, 'cycles starting (delay of ' + str(as_clks - 2) + ') at', as_start, 'and ending at', clks
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40 elif detect_fall(last, sample, m_as):
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41 as_start = clks
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42 last = sample
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43
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44 def main(args):
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45 if len(args) < 2:
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46 print 'Usage: analyze_olp.py filename'
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47 exit(1)
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48 olpfile = ZipFile(args[1], "r")
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49 channelfile = olpfile.open('channel.labels')
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50 channels = [line.strip() for line in channelfile.readlines()]
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51 channelfile.close()
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52 chanmap = {}
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53 for i in xrange(0, len(channels)):
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54 chanmap[channels[i]] = i
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55 datafile = olpfile.open('data.ols')
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56 analyze_delays(chanmap, datafile)
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57
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58
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59 if __name__ == '__main__':
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60 main(argv)