Tabo's Tactics addendum, by hap, Feb 18th 2006

I happen to like this game: 'Minna no Taabou no Nakayoshi Daisakusen', it's a
remake of 2 similar games on the MSX1 system called 'Rotors' and 'Pairs',
by ASCII.

Use this patch in combination with Suicidal Translations' Tabo's Tactics
Japanese to English translation v. 1.01. This fixes the problem that the
game doesn't work on some emulators, and adds a missing translation.

I actually started this somewhere in 2005, and tried to contact InVerse of
Suicidal Translations, but didn't get any reply. If InVerse shows up again and
decides to update his translation patch using the information underneath,
please remove this additional patch.



== the interesting stuff ==

The cause of the game crashing on some emulators is due to uninitialized RAM
being flushed with $00 instead of the supposedly correct $ff. It locks up in an
infinite NMI loop.

Originally, NMI is enabled twice: once before checking if the PPU has warmed
up, and once aftwerwards. Looks like a stupid game bug to me: normally NMI is
disabled before checking $2002.

offset $2b4a in .NES ROM (init routine):
a9 80		lda #$80
8d 00 20	sta $2000	;enable NMI

change to:
a9 00		lda #0
8d 00 20	sta $2000	;disable NMI

Another solution: luckily, the game only 'expects' RAM location $18 to be $ff.
Hacking this into the game is quite ugly, so I favour the smaller fix above...

offset $2b47 in .NES ROM
a2 ff		ldx #$ff
9a		txs
a9 80		lda #$80
8d 00 20	sta $2000	;enable NMI
a9 00		lda #0
8d 01 20	sta $2000	;disable display

change to:
a2 ff		ldx #$ff
9a		txs
86 18		stx $18		;[$18]=$ff
a9 80		lda #$80
8d 00 20	sta $2000	;enable NMI
8d 01 20	sta $2001	;disable display, kinda

A boring list:
emu boots it	original	NMI disable	[$18]=$ff
------------------------------------------------------------
FCEUclones	yes		yes		yes
Jnes		no		no		yes
Nessie		no		yes		yes
Nesterclones	yes		yes		yes
Nesticle :P	yes		yes		yes
Nestopia	yes		yes		yes
Nintendulator	no		yes		yes
No$nes		no		yes		yes
Olafnes		no		yes		yes
RockNES		yes		yes		yes
Schpune		yes		yes		yes
Sega Li		yes		yes		yes
UberNES		no		yes		yes
VirtuaNES	yes		yes		yes


Untranslated text, visible in attract mode (after the 1st demo)

offset $7aa1 in .NES ROM:
3e 41 35 45 21 41 31 30 08 0f 44 1b
linking to Japanese text: "press the start button"

change to:
29 2b 1e 2c 2c 03 2c 2d 1a 2b 2d ae
P  R  E  S  S     S  T  A  R  T  .