Mercurial > repos > blastem
view analyze_olp.py @ 622:b76d2a628ab9
Partially working switch to having a vcounter and hslot counter in the context rather than trying to derive them from the cycle count. This should allow for more accurate handling of mid screen mode switches. Interrupt timing is broken currently though
author | Michael Pavone <pavone@retrodev.com> |
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date | Tue, 17 Jun 2014 19:01:01 -0700 |
parents | be9c7b3e25ee |
children | b290343e5664 |
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#!/usr/bin/env python from zipfile import ZipFile from sys import exit, argv def detect_rise(last, sample, bit): mask = 1 << bit return (not last & mask) and (sample & mask) def detect_fall(last, sample, bit): mask = 1 << bit return (last & mask) and (not sample & mask) def detect_high(sample, bit): mask = 1 << bit return sample & mask def detect_low(sample, bit): mask = 1 << bit return not sample & mask def analyze_delays(chanmap, datafile): m68k_clk = chanmap['M68K CLK'] m_as = chanmap['!AS'] last = False clks = 0 as_start = 0 for line in datafile.readlines(): line = line.strip() if line and not line.startswith(';'): sample,_,num = line.partition('@') sample = int(sample, 16) if not (last is False): if detect_rise(last, sample, m68k_clk): clks = clks + 1 if detect_rise(last, sample, m_as): as_clks = clks - as_start if as_clks > 2: print '!AS held for', as_clks, 'cycles starting (delay of ' + str(as_clks - 2) + ') at', as_start, 'and ending at', clks elif detect_fall(last, sample, m_as): as_start = clks last = sample def main(args): if len(args) < 2: print 'Usage: analyze_olp.py filename' exit(1) olpfile = ZipFile(args[1], "r") channelfile = olpfile.open('channel.labels') channels = [line.strip() for line in channelfile.readlines()] channelfile.close() chanmap = {} for i in xrange(0, len(channels)): chanmap[channels[i]] = i datafile = olpfile.open('data.ols') analyze_delays(chanmap, datafile) if __name__ == '__main__': main(argv)