diff options
Diffstat (limited to 'analyze_olp.py')
| -rwxr-xr-x | analyze_olp.py | 69 |
1 files changed, 67 insertions, 2 deletions
diff --git a/analyze_olp.py b/analyze_olp.py index 4d7b935..4befb83 100755 --- a/analyze_olp.py +++ b/analyze_olp.py @@ -18,6 +18,16 @@ def detect_high(sample, bit): def detect_low(sample, bit): mask = 1 << bit return not sample & mask + +def get_value(sample, bits): + value = 0 + for i in xrange(0, len(bits)): + bit = bits[i] + value |= (sample >> bit & 1) << i + return value + +def swizzle_mode4(row, col): + return (col & 1) | (row << 1) | (col << 8 & 0xFE00) def analyze_delays(chanmap, datafile): if 'M68K_CLK' in chanmap: @@ -83,7 +93,61 @@ def analyze_refresh(chanmap, datafile): print 'RAM refresh at', clks, 'delta since last:', clks-prevRefresh prevRefresh = clks last = sample - + + +table_start = 0x3800 +table_end = table_start + 0x600 +sat_start = 0x3F00 #0x3E00 +sat_xname = sat_start + 0x80 +sat_end = sat_start + 0x100 + + +def analyze_vram(chanmap, datafile): + address_bits = [chanmap['AD{0}'.format(i)] for i in xrange(0, 8)] + ras = chanmap['!RAS'] + cas = chanmap['!CAS'] + hsync = chanmap['!HSYNC'] + state = 'begin' + last = False + 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_fall(last, sample, hsync): + print 'HSYNC low @ {0}'.format(num) + elif detect_rise(last, sample, hsync): + print 'HSYNC high @ {0}'.format(num) + if state == 'begin': + if detect_fall(last, sample, ras): + state = 'ras' + row = get_value(sample, address_bits) + elif detect_fall(last, sample, cas): + state = 'cas' + elif state == 'ras': + if detect_fall(last, sample, cas): + col = get_value(sample, address_bits) + address = swizzle_mode4(row, col) + + if address < table_end and address >= table_start: + offset = (address - table_start)/2 + desc = 'Map Row {0} Col {1}'.format(offset / 32, offset & 31) + elif address >= sat_start and address < sat_xname: + offset = address - sat_start + desc = 'Sprite {0} Y Read'.format(offset) + elif address >= sat_xname and address < sat_end: + offset = address - sat_xname + desc = 'Sprite {0} X/Name Read'.format(offset / 2) + else: + desc = 'Tile {0} Row {1}'.format(address / 32, ((address / 4) & 7) + (0.5 if address & 2 else 0)) + print '{0:02X}:{1:02X} - {2:04X} @ {3} - {4}'.format(row, col, address, num, desc) + state = 'begin' + elif state == 'cas': + if detect_fall(last, sample, ras): + print 'refresh @ {0}'.format(num) + state = 'begin' + last = sample def main(args): if len(args) < 2: @@ -98,7 +162,8 @@ def main(args): for i in xrange(0, len(channels)): chanmap[channels[i]] = i datafile = olpfile.open('data.ols') - analyze_delays(chanmap, datafile) + #analyze_delays(chanmap, datafile) + analyze_vram(chanmap, datafile) datafile.close() #datafile = olpfile.open('data.ols') #analyze_refresh(chanmap, datafile) |