Mercurial > repos > blastem
annotate analyze_olp.py @ 884:252dfd29831d
Selecting a second game from the menu now works
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 13 Nov 2015 22:56:59 -0800 |
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) |