diff --git a/graph_cycles_before_new_insn.py b/graph_cycles_before_new_insn.py
new file mode 100644
index 0000000..bc35493
--- /dev/null
+++ b/graph_cycles_before_new_insn.py
@@ -0,0 +1,184 @@
+import csv
+import math
+
+mnemonics = {
+    0x69: "ADC #oper",
+    0x65: "ADC oper",
+    0x75: "ADC oper,X",
+    0x6D: "ADC oper",
+    0x7D: "ADC oper,X",
+    0x79: "ADC oper,Y",
+    0x61: "ADC (oper,X)",
+    0x71: "ADC (oper),Y",
+    0x29: "AND #oper",
+    0x25: "AND oper",
+    0x35: "AND oper,X",
+    0x2D: "AND oper",
+    0x3D: "AND oper,X",
+    0x39: "AND oper,Y",
+    0x21: "AND (oper,X)",
+    0x31: "AND (oper),Y",
+    0x0A: "ASL A",
+    0x06: "ASL oper",
+    0x16: "ASL oper,X",
+    0x0E: "ASL oper",
+    0x1E: "ASL oper,X",
+    0x90: "BCC oper",
+    0xB0: "BCS oper",
+    0xF0: "BEQ oper",
+    0x24: "BIT oper",
+    0x2C: "BIT oper",
+    0x30: "BMI oper",
+    0xD0: "BNE oper",
+    0x10: "BPL oper",
+    0x00: "BRK",
+    0x50: "BVC oper",
+    0x70: "BVC oper",
+    0x18: "CLC",
+    0xD8: "CLD",
+    0x58: "CLI",
+    0xB8: "CLV",
+    0xC9: "CMP #oper",
+    0xC5: "CMP oper",
+    0xD5: "CMP oper,X",
+    0xCD: "CMP oper",
+    0xDD: "CMP oper,X",
+    0xD9: "CMP oper,Y",
+    0xC1: "CMP (oper,X)",
+    0xD1: "CMP (oper),Y",
+    0xE0: "CPX #oper",
+    0xE4: "CPX oper",
+    0xEC: "CPX oper",
+    0xC0: "CPY #oper",
+    0xC4: "CPY oper",
+    0xCC: "CPY oper",
+    0xC6: "DEC oper",
+    0xD6: "DEC oper,X",
+    0xCE: "DEC oper",
+    0xDE: "DEC oper,X",
+    0xCA: "DEC",
+    0x88: "DEC",
+    0x49: "EOR #oper",
+    0x45: "EOR oper",
+    0x55: "EOR oper,X",
+    0x4D: "EOR oper",
+    0x5D: "EOR oper,X",
+    0x59: "EOR oper,Y",
+    0x41: "EOR (oper,X)",
+    0x51: "EOR (oper),Y",
+    0xE6: "INC oper",
+    0xF6: "INC oper,X",
+    0xEE: "INC oper",
+    0xFE: "INC oper,X",
+    0xE8: "INX",
+    0xC8: "INY",
+    0x4C: "JMP oper",
+    0x6C: "JMP (oper)",
+    0x20: "JSR oper",
+    0xA9: "LDA #oper",
+    0xA5: "LDA oper",
+    0xB5: "LDA oper,X",
+    0xAD: "LDA oper",
+    0xBD: "LDA oper,X",
+    0xB9: "LDA oper,Y",
+    0xA1: "LDA (oper,X)",
+    0xB1: "LDA (oper),Y",
+    0xA2: "LDX #oper",
+    0xA6: "LDX oper",
+    0xB6: "LDX oper,Y",
+    0xAE: "LDX oper",
+    0xBE: "LDX oper,Y",
+    0xA0: "LDY #oper",
+    0xA4: "LDY oper",
+    0xB4: "LDY oper,X",
+    0xAC: "LDY oper",
+    0xBC: "LDY oper,X",
+    0x4A: "LSR A",
+    0x46: "LSR oper",
+    0x56: "LSR oper,X",
+    0x4E: "LSR oper",
+    0x5E: "LSR oper,X",
+    0xEA: "NOP",
+    0x09: "ORA #oper",
+    0x05: "ORA oper",
+    0x15: "ORA oper,X",
+    0x0D: "ORA oper",
+    0x1D: "ORA oper,X",
+    0x19: "ORA oper,Y",
+    0x01: "ORA (oper,X)",
+    0x11: "ORA (oper),Y",
+    0x48: "PHA",
+    0x08: "PHP",
+    0x68: "PLA",
+    0x28: "PHP",
+    0x2A: "ROL A",
+    0x26: "ROL oper",
+    0x36: "ROL oper,X",
+    0x2E: "ROL oper",
+    0x3E: "ROL oper,X",
+    0x6A: "ROR A",
+    0x66: "ROR oper",
+    0x76: "ROR oper,X",
+    0x6E: "ROR oper",
+    0x7E: "ROR oper,X",
+    0x40: "RTI",
+    0x60: "RTS",
+    0xE9: "SBC #oper",
+    0xE5: "SBC oper",
+    0xF5: "SBC oper,X",
+    0xED: "SBC oper",
+    0xFD: "SBC oper,X",
+    0xF9: "SBC oper,Y",
+    0xE1: "SBC (oper,X)",
+    0xF1: "SBC (oper),Y",
+    0x38: "SEC",
+    0xF8: "SED",
+    0x78: "SEI",
+    0x85: "STA oper",
+    0x95: "STA oper,X",
+    0x8D: "STA oper",
+    0x9D: "STA oper,X",
+    0x99: "STA oper,Y",
+    0x81: "STA (oper,X)",
+    0x91: "STA (oper),Y",
+    0x86: "STX oper",
+    0x96: "STX oper,Y",
+    0x8E: "STX oper",
+    0x84: "STY oper",
+    0x94: "STY oper,X",
+    0x8C: "STY oper",
+    0xAA: "TAX",
+    0xA8: "TAY",
+    0xBA: "TSX",
+    0x8A: "TXA",
+    0x9A: "TXS",
+    0x98: "TYA",
+};
+# 'a,'bs/     ..............\(.............\) \([0-9A-Z][0-9A-Z]\).*/0x\2: "\1",/
+
+logarithmic = False
+maxm = 0
+
+insns = []
+
+for (time, insn) in csv.reader(open("instructions_by_first_appearance_clock.csv")):
+    time = int(time)
+    insn = int("0x" + insn.strip(), 16)
+    insns.append((time, insn))
+    maxm = max(maxm, time)
+
+width = 52
+if logarithmic:
+    print "logarithmic chart"
+    maxm = math.log(maxm)
+else:
+    print "linear chart"
+    maxm = 407 # XXX
+
+for (time, insn) in insns:
+    if logarithmic:
+        bar = '*' * min(width, int(math.log(1 + time) * width / maxm))
+    else:
+        bar = '*' * min(width, int(time * width / maxm))
+    print "%02X %-14s %6d : %s" % (insn, '"%s"' % mnemonics[insn], time, bar)
+
diff --git a/instructions_by_first_appearance_clock.csv b/instructions_by_first_appearance_clock.csv
new file mode 100644
index 0000000..8f41387
--- /dev/null
+++ b/instructions_by_first_appearance_clock.csv
@@ -0,0 +1,75 @@
+0, D8
+1, 20
+2, A0
+3, 84
+4, 60
+6, A9
+7, 85
+8, AD
+12, F0
+17, D0
+18, 2C
+19, 08
+20, 8D
+21, 4C
+23, 88
+24, 30
+34, 48
+38, 29
+40, 98
+41, 18
+42, 69
+45, A5
+47, A4
+48, CC
+52, ED
+53, B0
+55, 8C
+56, AC
+63, 4A
+65, 09
+67, 68
+69, 90
+71, 0A
+73, 05
+78, 10
+80, 65
+84, A8
+87, B9
+128, 28
+136, A2
+141, 94
+142, 95
+216, B4
+218, C0
+231, B5
+334, BD
+335, DD
+356, C9
+366, EA
+373, 6C
+405, 38
+407, E9
+45341, 49
+45342, CD
+45409, 91
+45410, C8
+45411, C4
+45573, C5
+50104, 99
+50142, 9D
+50143, CA
+50162, 86
+50165, C6
+50170, B1
+50171, D9
+50239, 9A
+50404, 8A
+50445, E6
+50532, D1
+52573, 25
+52605, 4E
+53708, 45
+734811, AA
+735117, E0
+735129, 46