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NBA JAM for the Master System
Post Posted: Mon Sep 05, 2011 9:53 pm
Here's what I got in the mail this morning.

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Post Posted: Mon Sep 05, 2011 11:04 pm
- The two-players mode is functional.
- The game is dated 1994 (whereas the GG version is 1993).
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Post Posted: Tue Sep 06, 2011 12:08 am
OMG, I think I just wet my pants, I would of loved to have had NBA Jam on the sms, the GG port was pretty playable.
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Post Posted: Tue Sep 06, 2011 4:14 am
This may seem like a dumb question, but what's so special about the SMS version of NBA Jam? Is it any less common than the GG/MD versions? Or any less common than Alien 3, Krusty's Super Fun House or Crash Dummies?
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Post Posted: Tue Sep 06, 2011 5:52 am
English Invader wrote
This may seem like a dumb question, but what's so special about the SMS version of NBA Jam? Is it any less common than the GG/MD versions? Or any less common than Alien 3, Krusty's Super Fun House or Crash Dummies?


It didn't get released, so I'd say it's pretty uncommon ;)

Nice find BTW, looks pretty cool :).
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Post Posted: Tue Sep 06, 2011 8:53 pm
It's possible that this game was released as a pirate cart?? I remember playing a "non-16 bit" version of NBA Jam on a XXX in 1 SMS bootleg cartridge with my friends back then but I could be wrong...

PD: Loved that old school rgb monitor..
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Post Posted: Tue Sep 06, 2011 10:14 pm
chinitosoccer wrote
It's possible that this game was released as a pirate cart?? I remember playing a "non-16 bit" version of NBA Jam on a XXX in 1 SMS bootleg cartridge with my friends back then but I could be wrong...


It could also be a prototype cartridge that was never commercially released by Acclaim.
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Post Posted: Tue Sep 06, 2011 10:35 pm
English Invader wrote
chinitosoccer wrote
It's possible that this game was released as a pirate cart?? I remember playing a "non-16 bit" version of NBA Jam on a XXX in 1 SMS bootleg cartridge with my friends back then but I could be wrong...


It could also be a prototype cartridge that was never commercially released by Acclaim.


The possibilities for one of those rare prototypes being found in a small country in South America are 1 in a million..... I highly doubt it was a prototype.
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Post Posted: Tue Sep 06, 2011 11:16 pm
SMS NBA Jam... perhaps someday SMS Arch Rivals will turn up too?
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Post Posted: Wed Sep 07, 2011 12:46 am
Very nice find indeed, congratulations. Is it as awesome as Great Basketball?
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Post Posted: Wed Sep 07, 2011 5:01 am
Hopefully it's better than SMS Pat Reilly Basketball.
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Post Posted: Fri Sep 09, 2011 2:08 am
Wow, this looks pretty damned cool.
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Post Posted: Fri Sep 09, 2011 11:01 am
I have wet my pants too O_o
Where did you find it ?
We want the story behind :)
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ROM released
Post Posted: Tue Sep 20, 2011 10:55 pm
http://www.smspower.org/forums/viewtopic.php?p=67923
http://www.smspower.org/Games/NBAJam-SMS
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The story..
Post Posted: Tue Sep 20, 2011 11:06 pm
The story is quite a nice one!

I bought several prototypes from someone affiliated to an ex-developer. This particular one was advertised as being an Hang On prototype! As I often do I bought all his Sega 8-bits prototypes anyway.

The package then went on missing. I trusted the seller so at some point I assumed it could have been lost in the mail, then I forgot about it for a bit. Then finally arrived to me after more than two months (with no explanation from the post office).

It wouldn't run on the Master System and only when I dumped it I found out the surprise that it was NBA Jam! I first thought it was a Game Gear ROM copied to a SMS cartridge but no - the palette is correct and the game include a 2 players mode, so it is indeed a conversion of the game for the Master System.

Now the reason the seller thought it was Hang On is because the ROM image doesn't contain a valid Sega header. So running it on an unmodified western Sega Master System would show a software error screen or revert to the game in the console.. which happened to be Hang On.

(I'm sending a bit of additional money to the seller as he was good and helpful on all front)
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Post Posted: Wed Sep 21, 2011 12:49 am
Very nice!

To use Turbo in game, double tap any direction and it will stay engaged until you stop moving.
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Post Posted: Wed Sep 21, 2011 10:24 am
Bock wrote
It wouldn't run on the Master System and only when I dumped it I found out the surprise that it was NBA Jam!


Best. Surprise. Ever.
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Post Posted: Wed Sep 21, 2011 2:22 pm
Yeah, that's a great story!
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Post Posted: Wed Sep 21, 2011 5:11 pm
Great find, Thanks for sharing!
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Post Posted: Thu Sep 22, 2011 2:11 pm
Last edited by rouken on Thu Sep 22, 2011 5:42 pm; edited 1 time in total
First, thanx for the release of this pearl!! ^_^

Second, I tried the cheats of GG version and all worked perfectly. Exceptions: Use instead to play as Mark Turmell and Warren Moon. And the Juice Mode code don't worked. Any alternative way to make the Juice Mode work?

EDIT: You can use the Button for both players 1 and 2.
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Post Posted: Thu Sep 22, 2011 5:10 pm
How do I download this?
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Post Posted: Thu Sep 22, 2011 5:14 pm
ian wrote
How do I download this?

The news topic has it.
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Post Posted: Thu Oct 27, 2011 6:56 pm
rouken wrote
Any alternative way to make the Juice Mode work?


[2] x 14, [2]+[1]. The press of button 1 acts differently from the GG version so the same underlying code has to be entered slightly differently.
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Post Posted: Tue Dec 18, 2012 1:13 pm
Im the programmer both game gear and PS1 versions of NBA JAM.. I did the MS conversion and it was finished, but we had the problem of the buttons.. The arcade and all other home conversion used the same 3 buttons.. But the MS only had two and we could not find a acceptable way of making it work so the game was shelved.


Good find coz i don't even have a copy of this..

Chris Kirby

Iguana entertainment 1993 - 1996
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Post Posted: Sun Jan 27, 2013 9:43 am
Bock wrote
Here's what I got in the mail this morning.


Has this been tried on a everdrive/tototek sms cart?
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