Knobbe

There is a rumor floating around out there that part of the reason that Tecmo Koei has been remaking the 1993 SNES version of Tecmo Super Bowl is in part due to them not being able to locate the original source code to the cult classic 1991 NES release of Tecmo Super Bowl.  Today I'm happy to report that a decompiled version by @bruddog has been released to Github, making the source code for the original game available to anyone with interest in digging into the secrets of the game.
 
For those unfamiliar, Nintendo Entertainment System games are written in 6502 assembly code which is then optimized into kilobyte sized files that a NES can execute. In some ways, trying to interpret them as a human is akin to taking a book run through a shredded and taping the paper back together shred by shred.  Per the release, this is "An exhaustive disassembly of the NES game Tecmo Super Bowl into a byte-for-byte re-build of the original game".  @bruddog has gone through the trouble of "every last instruction and memory location" while even guessing at unused code in the game.
 
Due to the licensed images and characters in the game you will need to secure your own copy of TSB in order to complete the data required to compile a new game.  This operation will also create a decompiled and commented source code. For most, the tools we have more modifying the current game will be adequate and this will simply be a curiosity. For others, this will be a way to more effectively create modifications without needing to tediously try and decipher source code.  Perhaps this will one day you'll see a new retro type game release that plays exactly like the old NES Tecmo Super Bowl.
 
You can find the release at https://github.com/bruddog/Tecmo_Super_Bowl_NES_Disassembly
You'll need to have a Windows machine or else bring your own version of a 6502 compiler to the party.
I've not only verified that this works but also that if you're having trouble it's because you haven't taken the time to fully read through the build instructions.

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disregards this.  read the forum this morning.  i found the channel.  

There is a rumor floating around out there that part of the reason that Tecmo Koei has been remaking the 1993 SNES version of Tecmo Super Bowl is in part due to them not being able to locate the original source code to the cult classic 1991 NES release of Tecmo Super Bowl.  Today I'm happy to report that a decompiled version by @bruddog has been released to Github, making the source code for the original game available to anyone with interest in digging into the secrets of the game.
 
For those unfamiliar, Nintendo Entertainment System games are written in 6502 assembly code which is then optimized into kilobyte sized files that a NES can execute. In some ways, trying to interpret them as a human is akin to taking a book run through a shredded and taping the paper back together shred by shred.  Per the release, this is "An exhaustive disassembly of the NES game Tecmo Super Bowl into a byte-for-byte re-build of the original game".  @bruddog has gone through the trouble of "every last instruction and memory location" while even guessing at unused code in the game.
 
Due to the licensed images and characters in the game you will need to secure your own copy of TSB in order to complete the data required to compile a new game.  This operation will also create a decompiled and commented source code. For most, the tools we have more modifying the current game will be adequate and this will simply be a curiosity. For others, this will be a way to more effectively create modifications without needing to tediously try and decipher source code.  Perhaps this will one day you'll see a new retro type game release that plays exactly like the old NES Tecmo Super Bowl.
 
You can find the release at https://github.com/bruddog/Tecmo_Super_Bowl_NES_Disassembly
You'll need to have a Windows machine or else bring your own version of a 6502 compiler to the party.
I've not only verified that this works but also that if you're having trouble it's because you haven't taken the time to fully read through the build instructions.

View full article

Actually, Tecmo Super Bowl's outcome was pretty accurate! 😁

I've been doing some (more) research into this & even though haven't solved my lifelong goal of "who is on the cover of TSB cart" - I did find a pretty cool story about how they got who is on the cover!
 
So Tecmo wanted to use Marcus Allen on the cover (not Bo Jackson I'm guessing bc he was a mega star to the likes of MJ, Lebron, Derek Jeter, etc.. he wouldn't be worth even asking bc he would've been 10x anyone else at the time) - Allen was w/ the Raiders and they were a local team for Tecmo's HQ so it made sense (be like if today there was a video game company in San Francisco and they wanted ot put a player on the cover of their cartridge, Christian McCaf. would be the one for it) - so Marcus was approached about using a picture of him going over the goal line on the cover- Marcus Allen wanted $50k for this PLUS a certain % royatly on every cartridge sold. 
 
Tecmo told Marcus Allen's agent "where to stick their $50k offer" - Tecmo went looking for other current players but all of their agents wanted what was considered way too much so they hired a model for the day. 
 
Imagine if Tecmo actually gave a % cut of every cartridge sold to Marcus Allen or another player - over the years we are talking about WAY more than their late 80s / early 90s NFL contracts paid them!
 
So I still am looking for my lifelong quest of the model used on the cartridge & plan on having him autograph a cart for me - but in the mean time the stories & info finding along the way is jsut as fascinating! 

2 TB12 Challenges
 
1. Go undefeated while also guiding the Giants into the Super Bowl.  Attempt to beat the Giants with full CPU juice.
2. Man control all games against Brady to make him go 0-16

You need an updated version of TSB Tool.  The sim settings are wrongly identified in earlier versions
 
Offensive sim settings are based on individual players.
The settings control Rush and pass defense, respectively
 

The 'official' Tecmo Super Bowl simulation of Super Bowl 57 is out.  Catch Patrick Mahomes and the  Kansas City Chiefs take on Christian Caffrey and the 49ers in a rematch of Super Bowl 54
 
 
 

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I am going to post something hopefully in the next month or so. I have been using diztinguish with bsnes to do a lot of the hard work with snes roms (variable register sizes). Luckily a decent amount of the reverse engineering I did for nes
ports over to the nes. There is obviously lots of things that are more complicated and different (graphics engine, sound engine). 
 
 

Project Arcturus couldn't have succeeded without you.
This will get you a little closer to that dream of yours.
It's not Taylor in the game, but it's a start.
Drop me a line if you're on the East Coast,
Hank Scorpio
 

The 'official' Tecmo Super Bowl simulation of Super Bowl 57 is out.  Catch Patrick Mahomes and the  Kansas City Chiefs take on Christian Caffrey and the 49ers in a rematch of Super Bowl 54
 
 
 

View full article

Project Arcturus couldn't have succeeded without you.
This will get you a little closer to that dream of yours.
It's not Taylor in the game, but it's a start.
Drop me a line if you're on the East Coast,
Hank Scorpio
 

Via this thread here is the logic that, among other things, breaks down OT.
The code will check to see if it's the playoffs and jump to OT with no clock. Else it will go to a timed 5th quarter.
 
This hack removes the logic check and will go to untimed playoff type OT for all games including pre-season, regular season, and pro bowl.
 
SET(0x2216F,0xEAEAEAEAEAEAEAEAEAEAEAEAEAEAEAEA)

the ghost of Dave Krieg will not be slandered

Had an issue where you couldn't upload SNES/Gens games.
I think I put most of them into the right section. If not, let me know what else might need to be moved.

New updates:
- NFL logo main menu
- NFL logo center field
- Tecmo field logo... changed to "X" by kickoff
- 3 colors line on the 20 yards. blue white red.
- EndZone changes color depending on the team's side. the colors are the same as the helmet team.
- All home and away shirt colors have been changed for the 2023 season.
 
The next step is to change the complete squad and skills for the 2023/2024 season.
 
See you soon!!

😃🖖

This is not accurate.  Quickness doesn't do anything in SKP vs SKP season simulation.  There are separate defensive sim stats that control this.

This is not accurate.  Quickness doesn't do anything in SKP vs SKP season simulation.  There are separate defensive sim stats that control this.

1.0.3 update:
 OL - Joe Thomas stats fix 

It was pretty hard the first time. 

Rams helmet updated
Credit past me as I basically just copied and pasted this stuff
TSB Base 32-Team ROM Rams- 2023.nes

2 TB12 Challenges
 
1. Go undefeated while also guiding the Giants into the Super Bowl.  Attempt to beat the Giants with full CPU juice.
2. Man control all games against Brady to make him go 0-16

You need an updated version of TSB Tool.  The sim settings are wrongly identified in earlier versions
 
Offensive sim settings are based on individual players.
The settings control Rush and pass defense, respectively