Mike Tyson's Punch-Out!!: MTPO Milli Hack 
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MTPO Milli Hack
Description: The default MTPO fight time reporting uses a crude rounding technique. This hack allows for accurate millisecond timer reporting at the end of fights.
v2.0: added support for reporting Tyson fight time on victory screen.
v3.0: Replaced points counter with realtime last-punch-landed timer. It should not affect game timing/lag. I have seen instances of overrun ahead of actual round timer, this only appears to occur on knockdowns not ending the fight.
See the readme in zip for patch/assembly details.
MTPO Milli Hack
Description: Add granularity to the millisecond timer in MTPO reported at the end of fights.
History:
v1.0 (5/1/20): Initial ver, updated end of fights for all characters except Tyson.
v2.0 (5/3/20): Update to add time to Tyson victory screen.
v3.0 (5/7/20): Replaced points counter with realtime last-punch-landed timer. It should not affect game timing/lag.
I have seen instances of overrun ahead of actual round timer, this only appears to occur on knockdowns not ending the fight.
=====================================================================================
RAM position 0x306 contains the MS counter, while 0x307 appears to contain an inverse counter. It's not clear the role of 0x307, perhaps an anti-cheat/sanity check (not used afaict).
At the beginning of round 1, 0x308/9 are loaded with: 04 F9 (1st rd), 05 6D (2nd rd), 05 F8 (3rd rd). The MS counter at 0x306 adds 0x308 to itself with each iteration, until it is >= 0x64 (100).
This code can be traced:
03:8780:AD 07 03 LDA $0307 = #$AF
03:8783:18 CLC
03:8784:6D 09 03 ADC $0309 = #$F9
03:8787:8D 07 03 STA $0307 = #$AF
03:878A:AD 06 03 LDA $0306 = #$5E ; MS
03:878D:6D 08 03 ADC $0308 = #$04
03:8790:8D 06 03 STA $0306 = #$5E
03:8793:C9 64 CMP #$64 ; is MS >= 0x64
03:8795:90 52 BCC $87E9 ; if not, skip updating time
03:8797:E9 64 SBC #$64 ; subtract 0x64
03:8799:8D 06 03 STA $0306 = #$5E ; save the overflow
Once victory occurs, the following code translates the MS on the win screen:
06:BC99:AD 06 03 LDA $0306 = #$14 ; load MS
06:BC9C:29 F0 AND #$F0 ; clear low nibble
06:BC9E:4A LSR ; shift right x1
06:BC9F:4A LSR ; ""
06:BCA0:4A LSR ; ""
06:BCA1:A8 TAY
So the above essentially rounds the actual MS to the next lowest 16, then divides by 8. This basically gives us all the even #s from 0-12.
Finally it takes this even # and pulls the limited MS values from a lookup table (there are a few versions):
06:BCA2:B9 B0 BC LDA $BCB0,Y @ $BD3D = #$5C
06:BCA5:8D 07 20 STA PPU_DATA = #$00
06:BCA8:C8 INY
06:BCA9:B9 B0 BC LDA $BCB0,Y @ $BD3D = #$5C
06:BCAC:8D 07 20 STA PPU_DATA = #$00
BCB0: 01 01 03 06 05 09 07 02 09 03 0A 08 0A 0A (if you subtract one from each, this is .00, .25, etc)
So we replace the drawing code and lookup table with a routine to convert the hexadecimal MS (0x306) directly to decimal (+1 to adjust for tile ID):
06:BC99:AD 06 03 LDA $0306 = #$4A
06:BC9C:C9 64 CMP #$64 ; is the MS actually = 100? it can happen (race condition?) before the seconds are updated
06:BC9E:90 02 BCC $BCA2
06:BCA0:A9 63 LDA #$63 ; if it is, we will just make it .99
06:BCA2:A2 01 LDX #$01
06:BCA4:C9 0A CMP #$0A
06:BCA6:90 06 BCC $BCAE
06:BCA8:E9 0A SBC #$0A
06:BCAA:E8 INX
06:BCAB:4C A4 BC JMP $BCA4
06:BCAE:A8 TAY
06:BCAF:C8 INY
06:BCB0:8E 07 20 STX PPU_DATA = #$00 ; store tenths
06:BCB3:8C 07 20 STY PPU_DATA = #$00 ; store hundreths
06:BCB6:60 RTS
*** v2.0: Disassembly for Tyson time addition ***
First thing to do is modify the victory text(0x120F7) to make room for the time. I simply truncated it at the 3rd line and added 'TIME' to start 4th line.
The Tyson victory screen code can be found at:
06:B757: 20 66 B6 JSR $B666
06:B75A: 20 5C AA JSR $AA5C
06:B75D: A9 FF LDA #$FF
06:B75F: 20 AE BF JSR $BFAE
06:B762: 20 B2 BF JSR $BFB2
06:B765: A9 06 LDA #$06
06:B767: A2 05 LDX #$05
06:B769: 20 21 BF JSR $BF21 ; this fills the PPU with the victory pic/text
06:B76C: A9 01 LDA #$01 ; replace with
06:B76E: 20 13 C1 JSR $C113 ; jmp to $8d50
06:B771: A9 00 LDA #$00
06:B773: A2 01 LDX #$01
06:B775: 20 0D BF JSR $BF0D
So we intercept @ B76C and jump to our code in some unused ROM space:
04:8D50: A9 23 LDA #$23
04:8D52: 8D 06 20 STA PPU_ADDRESS = #$44
04:8D55: A9 56 LDA #$56
04:8D57: 8D 06 20 STA PPU_ADDRESS = #$44 ; set PPU write address to 2356, 4th line of text
04:8D5A: 20 F2 C0 JSR $C0F2 ; dump m:ss
04:8D5D: 20 94 BC JSR $BC94 ; dump .ms
04:8D60: A9 2B LDA #$2B
04:8D62: 8D 07 20 STA PPU_DATA = #$00 ; ,
04:8D65: A9 1C LDA #$1C
04:8D67: 8D 07 20 STA PPU_DATA = #$00 ; R
04:8D6A: A6 06 LDX $06 = #$01
04:8D6C: E8 INX
04:8D6D: 8E 07 20 STX PPU_DATA = #$00 ; x
04:8D70: A9 01 LDA #$01 ; execute code
04:8D72: 20 13 C1 JSR $C113 ; we overwrote above
04:8D75: 4C 71 B7 JMP $B771 ; return to original code
*************************************************
*** v3.0: Disassembly for pts => time hack ******
First change the 'POINTS' text in the ROM (0x191D2) to 'TIME:'. Next, the code for updating the points total occurs @ C0C3:
07:C0C3: A9 20 LDA #$20
07:C0C5: 8D 06 20 STA PPU_ADDRESS = #$00
07:C0C8: A9 88 LDA #$88 ; $2088 is where pts total starts
07:C0CA: 8D 06 20 STA PPU_ADDRESS = #$00
07:C0CD: A2 00 LDX #$00
07:C0CF: BD F1 03 LDA $03F1,X @ $0430 = #$00
07:C0D2: 8D 07 20 STA PPU_DATA = #$00
07:C0D5: E8 INX
07:C0D6: E0 06 CPX #$06 ; loop to print up to 6 digits
07:C0D8: D0 F5 BNE $C0CF
The updated code for the time hack:
07:C0C3: A9 20 LDA #$20
07:C0C5: 8D 06 20 STA PPU_ADDRESS = #$4D
07:C0C8: A9 87 LDA #$87 ; adjusted start by -1 for more room
07:C0CA: 8D 06 20 STA PPU_ADDRESS = #$4D
07:C0CD: 20 F2 C0 JSR $C0F2 ; dump m:ss
07:C0D0: 20 94 BC JSR $BC94 ; dump .ms
07:C0D3: EA NOP
07:C0D4: EA NOP
07:C0D5: EA NOP
07:C0D6: EA NOP
07:C0D7: EA NOP
07:C0D8: EA NOP
07:C0D9: EA NOP
*************************************************
Tested on all characters in FCEUX 2.2.3 / Mesen 0.9.9.
Thanks to http://tasvideos.org/GameResources/NES/MikeTysonsPunchout/RamMap.html for helping get me started. Patch data below.
Stag Shot
==================================================================================
Source ROM: Mike Tyson's Punch-Out!! (USA).nes (md5=B9A66B2760DAA7D5639CBAD903DE8A18)
Comparing files mtpo.nes and MTPO-MILLI_V3.NES
000120F7: 1D 25
000120FC: 10 FF
000120FD: 13 FF
000120FE: 18 1E
000120FF: 11 13
00012100: 0F 17
00012101: 1C 0F
00012103: 1D FF
00012104: 1A FF
00012105: 0F FF
00012106: 0F FF
00012107: 0E FF
0001210A: 0C FF
0001210B: 0F FF
0001210C: 10 FF
0001210D: 19 FF
0001211A: 1F 25
0001211B: 0D 25
0001211C: 12 2A
00012120: 1C FF
00012121: 0F FF
00012122: 25 FF
00012123: 2A FF
00012D60: 00 A9
00012D61: 00 23
00012D62: 00 8D
00012D63: 00 06
00012D64: 00 20
00012D65: 00 A9
00012D66: 00 56
00012D67: 00 8D
00012D68: 00 06
00012D69: 00 20
00012D6A: 00 20
00012D6B: 00 F2
00012D6C: 00 C0
00012D6D: 00 20
00012D6E: 00 94
00012D6F: 00 BC
00012D70: 00 A9
00012D71: 00 2B
00012D72: 00 8D
00012D73: 00 07
00012D74: 00 20
00012D75: 00 A9
00012D76: 00 1C
00012D77: 00 8D
00012D78: 00 07
00012D79: 00 20
00012D7A: 00 A6
00012D7B: 00 06
00012D7C: 00 E8
00012D7D: 00 8E
00012D7E: 00 07
00012D7F: 00 20
00012D80: 00 A9
00012D81: 00 01
00012D82: 00 20
00012D83: 00 13
00012D84: 00 C1
00012D85: 00 4C
00012D86: 00 71
00012D87: 00 B7
000191D2: 1A 1E
000191D3: 19 13
000191D4: 13 17
000191D5: 18 0F
000191D6: 1E 2C
000191D7: 1D FF
000191D8: 2C FF
0001B77C: A9 4C
0001B77D: 01 50
0001B77E: 20 8D
0001B77F: 13 EA
0001B780: C1 EA
0001BCAC: 29 C9
0001BCAD: F0 64
0001BCAE: 4A 90
0001BCAF: 4A 02
0001BCB0: 4A A9
0001BCB1: A8 63
0001BCB2: B9 A2
0001BCB3: B0 01
0001BCB4: BC C9
0001BCB5: 8D 0A
0001BCB6: 07 90
0001BCB7: 20 06
0001BCB8: C8 E9
0001BCB9: B9 0A
0001BCBA: B0 E8
0001BCBB: BC 4C
0001BCBC: 8D A4
0001BCBD: 07 BC
0001BCBE: 20 A8
0001BCBF: 60 C8
0001BCC0: 01 8E
0001BCC1: 01 07
0001BCC2: 03 20
0001BCC3: 06 8C
0001BCC4: 05 07
0001BCC5: 09 20
0001BCC6: 07 60
0001C0D9: 88 87
0001C0DD: A2 20
0001C0DE: 00 F2
0001C0DF: BD C0
0001C0E0: F1 20
0001C0E1: 03 94
0001C0E2: 8D BC
0001C0E3: 07 EA
0001C0E4: 20 EA
0001C0E5: E8 EA
0001C0E6: E0 EA
0001C0E7: 06 EA
0001C0E8: D0 EA
0001C0E9: F5 EA
Patched ROM v3 md5=1E613757E0CA9FE41A637913FD8CA3AA
Database match: Mike Tyson's Punch-Out!! (Japan, USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 5D287F933931B14504EB2A3C40FEF1AF2AE083EA
File CRC32: 83DB7938
ROM SHA-1: 339EB36ACBBBEC96C8D177F0265253A5764CC1FB
ROM CRC32: 92A2185C
Description: The default MTPO fight time reporting uses a crude rounding technique. This hack allows for accurate millisecond timer reporting at the end of fights.
v2.0: added support for reporting Tyson fight time on victory screen.
v3.0: Replaced points counter with realtime last-punch-landed timer. It should not affect game timing/lag. I have seen instances of overrun ahead of actual round timer, this only appears to occur on knockdowns not ending the fight.
See the readme in zip for patch/assembly details.
MTPO Milli Hack
Description: Add granularity to the millisecond timer in MTPO reported at the end of fights.
History:
v1.0 (5/1/20): Initial ver, updated end of fights for all characters except Tyson.
v2.0 (5/3/20): Update to add time to Tyson victory screen.
v3.0 (5/7/20): Replaced points counter with realtime last-punch-landed timer. It should not affect game timing/lag.
I have seen instances of overrun ahead of actual round timer, this only appears to occur on knockdowns not ending the fight.
=====================================================================================
RAM position 0x306 contains the MS counter, while 0x307 appears to contain an inverse counter. It's not clear the role of 0x307, perhaps an anti-cheat/sanity check (not used afaict).
At the beginning of round 1, 0x308/9 are loaded with: 04 F9 (1st rd), 05 6D (2nd rd), 05 F8 (3rd rd). The MS counter at 0x306 adds 0x308 to itself with each iteration, until it is >= 0x64 (100).
This code can be traced:
03:8780:AD 07 03 LDA $0307 = #$AF
03:8783:18 CLC
03:8784:6D 09 03 ADC $0309 = #$F9
03:8787:8D 07 03 STA $0307 = #$AF
03:878A:AD 06 03 LDA $0306 = #$5E ; MS
03:878D:6D 08 03 ADC $0308 = #$04
03:8790:8D 06 03 STA $0306 = #$5E
03:8793:C9 64 CMP #$64 ; is MS >= 0x64
03:8795:90 52 BCC $87E9 ; if not, skip updating time
03:8797:E9 64 SBC #$64 ; subtract 0x64
03:8799:8D 06 03 STA $0306 = #$5E ; save the overflow
Once victory occurs, the following code translates the MS on the win screen:
06:BC99:AD 06 03 LDA $0306 = #$14 ; load MS
06:BC9C:29 F0 AND #$F0 ; clear low nibble
06:BC9E:4A LSR ; shift right x1
06:BC9F:4A LSR ; ""
06:BCA0:4A LSR ; ""
06:BCA1:A8 TAY
So the above essentially rounds the actual MS to the next lowest 16, then divides by 8. This basically gives us all the even #s from 0-12.
Finally it takes this even # and pulls the limited MS values from a lookup table (there are a few versions):
06:BCA2:B9 B0 BC LDA $BCB0,Y @ $BD3D = #$5C
06:BCA5:8D 07 20 STA PPU_DATA = #$00
06:BCA8:C8 INY
06:BCA9:B9 B0 BC LDA $BCB0,Y @ $BD3D = #$5C
06:BCAC:8D 07 20 STA PPU_DATA = #$00
BCB0: 01 01 03 06 05 09 07 02 09 03 0A 08 0A 0A (if you subtract one from each, this is .00, .25, etc)
So we replace the drawing code and lookup table with a routine to convert the hexadecimal MS (0x306) directly to decimal (+1 to adjust for tile ID):
06:BC99:AD 06 03 LDA $0306 = #$4A
06:BC9C:C9 64 CMP #$64 ; is the MS actually = 100? it can happen (race condition?) before the seconds are updated
06:BC9E:90 02 BCC $BCA2
06:BCA0:A9 63 LDA #$63 ; if it is, we will just make it .99
06:BCA2:A2 01 LDX #$01
06:BCA4:C9 0A CMP #$0A
06:BCA6:90 06 BCC $BCAE
06:BCA8:E9 0A SBC #$0A
06:BCAA:E8 INX
06:BCAB:4C A4 BC JMP $BCA4
06:BCAE:A8 TAY
06:BCAF:C8 INY
06:BCB0:8E 07 20 STX PPU_DATA = #$00 ; store tenths
06:BCB3:8C 07 20 STY PPU_DATA = #$00 ; store hundreths
06:BCB6:60 RTS
*** v2.0: Disassembly for Tyson time addition ***
First thing to do is modify the victory text(0x120F7) to make room for the time. I simply truncated it at the 3rd line and added 'TIME' to start 4th line.
The Tyson victory screen code can be found at:
06:B757: 20 66 B6 JSR $B666
06:B75A: 20 5C AA JSR $AA5C
06:B75D: A9 FF LDA #$FF
06:B75F: 20 AE BF JSR $BFAE
06:B762: 20 B2 BF JSR $BFB2
06:B765: A9 06 LDA #$06
06:B767: A2 05 LDX #$05
06:B769: 20 21 BF JSR $BF21 ; this fills the PPU with the victory pic/text
06:B76C: A9 01 LDA #$01 ; replace with
06:B76E: 20 13 C1 JSR $C113 ; jmp to $8d50
06:B771: A9 00 LDA #$00
06:B773: A2 01 LDX #$01
06:B775: 20 0D BF JSR $BF0D
So we intercept @ B76C and jump to our code in some unused ROM space:
04:8D50: A9 23 LDA #$23
04:8D52: 8D 06 20 STA PPU_ADDRESS = #$44
04:8D55: A9 56 LDA #$56
04:8D57: 8D 06 20 STA PPU_ADDRESS = #$44 ; set PPU write address to 2356, 4th line of text
04:8D5A: 20 F2 C0 JSR $C0F2 ; dump m:ss
04:8D5D: 20 94 BC JSR $BC94 ; dump .ms
04:8D60: A9 2B LDA #$2B
04:8D62: 8D 07 20 STA PPU_DATA = #$00 ; ,
04:8D65: A9 1C LDA #$1C
04:8D67: 8D 07 20 STA PPU_DATA = #$00 ; R
04:8D6A: A6 06 LDX $06 = #$01
04:8D6C: E8 INX
04:8D6D: 8E 07 20 STX PPU_DATA = #$00 ; x
04:8D70: A9 01 LDA #$01 ; execute code
04:8D72: 20 13 C1 JSR $C113 ; we overwrote above
04:8D75: 4C 71 B7 JMP $B771 ; return to original code
*************************************************
*** v3.0: Disassembly for pts => time hack ******
First change the 'POINTS' text in the ROM (0x191D2) to 'TIME:'. Next, the code for updating the points total occurs @ C0C3:
07:C0C3: A9 20 LDA #$20
07:C0C5: 8D 06 20 STA PPU_ADDRESS = #$00
07:C0C8: A9 88 LDA #$88 ; $2088 is where pts total starts
07:C0CA: 8D 06 20 STA PPU_ADDRESS = #$00
07:C0CD: A2 00 LDX #$00
07:C0CF: BD F1 03 LDA $03F1,X @ $0430 = #$00
07:C0D2: 8D 07 20 STA PPU_DATA = #$00
07:C0D5: E8 INX
07:C0D6: E0 06 CPX #$06 ; loop to print up to 6 digits
07:C0D8: D0 F5 BNE $C0CF
The updated code for the time hack:
07:C0C3: A9 20 LDA #$20
07:C0C5: 8D 06 20 STA PPU_ADDRESS = #$4D
07:C0C8: A9 87 LDA #$87 ; adjusted start by -1 for more room
07:C0CA: 8D 06 20 STA PPU_ADDRESS = #$4D
07:C0CD: 20 F2 C0 JSR $C0F2 ; dump m:ss
07:C0D0: 20 94 BC JSR $BC94 ; dump .ms
07:C0D3: EA NOP
07:C0D4: EA NOP
07:C0D5: EA NOP
07:C0D6: EA NOP
07:C0D7: EA NOP
07:C0D8: EA NOP
07:C0D9: EA NOP
*************************************************
Tested on all characters in FCEUX 2.2.3 / Mesen 0.9.9.
Thanks to http://tasvideos.org/GameResources/NES/MikeTysonsPunchout/RamMap.html for helping get me started. Patch data below.
Stag Shot
==================================================================================
Source ROM: Mike Tyson's Punch-Out!! (USA).nes (md5=B9A66B2760DAA7D5639CBAD903DE8A18)
Comparing files mtpo.nes and MTPO-MILLI_V3.NES
000120F7: 1D 25
000120FC: 10 FF
000120FD: 13 FF
000120FE: 18 1E
000120FF: 11 13
00012100: 0F 17
00012101: 1C 0F
00012103: 1D FF
00012104: 1A FF
00012105: 0F FF
00012106: 0F FF
00012107: 0E FF
0001210A: 0C FF
0001210B: 0F FF
0001210C: 10 FF
0001210D: 19 FF
0001211A: 1F 25
0001211B: 0D 25
0001211C: 12 2A
00012120: 1C FF
00012121: 0F FF
00012122: 25 FF
00012123: 2A FF
00012D60: 00 A9
00012D61: 00 23
00012D62: 00 8D
00012D63: 00 06
00012D64: 00 20
00012D65: 00 A9
00012D66: 00 56
00012D67: 00 8D
00012D68: 00 06
00012D69: 00 20
00012D6A: 00 20
00012D6B: 00 F2
00012D6C: 00 C0
00012D6D: 00 20
00012D6E: 00 94
00012D6F: 00 BC
00012D70: 00 A9
00012D71: 00 2B
00012D72: 00 8D
00012D73: 00 07
00012D74: 00 20
00012D75: 00 A9
00012D76: 00 1C
00012D77: 00 8D
00012D78: 00 07
00012D79: 00 20
00012D7A: 00 A6
00012D7B: 00 06
00012D7C: 00 E8
00012D7D: 00 8E
00012D7E: 00 07
00012D7F: 00 20
00012D80: 00 A9
00012D81: 00 01
00012D82: 00 20
00012D83: 00 13
00012D84: 00 C1
00012D85: 00 4C
00012D86: 00 71
00012D87: 00 B7
000191D2: 1A 1E
000191D3: 19 13
000191D4: 13 17
000191D5: 18 0F
000191D6: 1E 2C
000191D7: 1D FF
000191D8: 2C FF
0001B77C: A9 4C
0001B77D: 01 50
0001B77E: 20 8D
0001B77F: 13 EA
0001B780: C1 EA
0001BCAC: 29 C9
0001BCAD: F0 64
0001BCAE: 4A 90
0001BCAF: 4A 02
0001BCB0: 4A A9
0001BCB1: A8 63
0001BCB2: B9 A2
0001BCB3: B0 01
0001BCB4: BC C9
0001BCB5: 8D 0A
0001BCB6: 07 90
0001BCB7: 20 06
0001BCB8: C8 E9
0001BCB9: B9 0A
0001BCBA: B0 E8
0001BCBB: BC 4C
0001BCBC: 8D A4
0001BCBD: 07 BC
0001BCBE: 20 A8
0001BCBF: 60 C8
0001BCC0: 01 8E
0001BCC1: 01 07
0001BCC2: 03 20
0001BCC3: 06 8C
0001BCC4: 05 07
0001BCC5: 09 20
0001BCC6: 07 60
0001C0D9: 88 87
0001C0DD: A2 20
0001C0DE: 00 F2
0001C0DF: BD C0
0001C0E0: F1 20
0001C0E1: 03 94
0001C0E2: 8D BC
0001C0E3: 07 EA
0001C0E4: 20 EA
0001C0E5: E8 EA
0001C0E6: E0 EA
0001C0E7: 06 EA
0001C0E8: D0 EA
0001C0E9: F5 EA
Patched ROM v3 md5=1E613757E0CA9FE41A637913FD8CA3AA
Database match: Mike Tyson's Punch-Out!! (Japan, USA)
Database: No-Intro: Nintendo Entertainment System (v. 20180803-121122)
File SHA-1: 5D287F933931B14504EB2A3C40FEF1AF2AE083EA
File CRC32: 83DB7938
ROM SHA-1: 339EB36ACBBBEC96C8D177F0265253A5764CC1FB
ROM CRC32: 92A2185C
NES Emulator Required
Time to Beat
Main Story 3h 0m
Main + Extras 3h 0m
ttb_all 3h 0m
Release Date
May 7, 2020
4 years ago
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