view analyze_olp.py @ 621:5196333b37a6

Fix a few values reported by the vr debugger command. Add DMA registers to vr debugger command. Fix horizontal interrupt bug. Slightly more accurate (but still broken) handling of switches between H32 and H40 modes.
author Michael Pavone <pavone@retrodev.com>
date Mon, 16 Jun 2014 19:13:28 -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)