Fantasy Zone 2 DX Free Play hack

[mikejmoffitt]

This has irritated me for a little while, that this game doesn't support proper Free Play. I threw this together the other night: http://mikejmoffitt.com/articles/0050-f ... eplay.html



The changes:

# Show "Free Play" instead of "Credit 0"
0x03AAC2 = 0x4652454520504c4159 ("Free Play")
0x024A54 = 0x4E714E714E714E71 (nop nop nop nop)
0x024A66 = 0x4E714E714E71 (nop nop nop)
0x024A74 = 0x4E714E714E714E71 (nop nop nop nop

# Flash "1 or 2 Player Start" instead of "Insert Coin" at Title
0x00576C = 0x600008DC (bra.w +0x8DC)
0x00604E = 4E714E71 (nop nop)

# Coin insert doesn't reset title screen
0x0055E0 = 0x4E71 (nop)

# Coin insert doesn't transition from story -> title
0x02C21A = 0x6012 (bra.s +0x12)

# Game start doesn't subtract coin(s)
0x024A20 = 0x4282 (clr.l d2; d2 is cost argument)

# Skip credit check at title/high score
0x0055F4 = 0x602C (bra.s +0x2C game start @ 0x5622)
0x005606 = 0x4E714E71 (nop nop)

# Skip credit check during demo screen
0x02EEE2 = 0x600000B4 (bra.w +0xB4)
0x02EEF0 = 0x600000C4 (bra.w +0xC4)

# Skip credit check during story
0x02C240 = 0x600000E2 (bra.w +0xE2)
0x02C254 = 0x4E714E71 (nop nop)

# Display 1 or 2 players start instead of Insert Coin (center)
0x02EE4C = 0x60000128 (bra.w +0x0128 game start @ 0x2EF76)

[nem]

Nice!

I've always been interested in these hacks, so the indepth explanation is great. Thanks!