samspot / 1943-nes-romhacks Goto Github PK

My First NES Romhack has 2 goals:

1. 1943's soundtrack is amazing, but quickly spoiled when you are below 20 energy and the warning music plays. This hack removes the warning music so you can enjoy Kumi Yamaga's stage music without interruption.
2. The original game has 24 levels, which I consider far too long. Modern SHMUPS typically have a 5 level structure and can be completed in about 30 minutes. This hack molds 1943 into that structure.

TODO: News post https://www.romhacking.net/news/addentrypage/

m3 bomber no 3b m9 bomber no 9b

0411 10's digit energy - look for this to go < 2 0410 1's digit, don't think we need to worry about it

key breakpoint

address: F48F condition: $0411==#01

$0347 is upgrade points

code: 06:A5BE ; A9 03 ; Sets points to always be 3 on start & pickup

Breakpoint 1 Hit at $F48F: $F48F:EC--X- Condition:$0411==#01 (2658 lines skipped) A:01 X:00 Y:02 S:FD P:NvUbdIzc $D56E: A5 87 LDA $87 = #$00 A:00 X:00 Y:02 S:FD P:nvUbdIZc $D570: D0 06 BNE $D578 A:00 X:00 Y:02 S:FD P:nvUbdIZc $D572: E6 87 INC $87 = #$00 A:00 X:00 Y:02 S:FD P:nvUbdIzc $D574: A9 0B LDA #$0B A:0B X:00 Y:02 S:FD P:nvUbdIzc $D576: 85 58 STA $58 = #$F0 (8377 lines skipped) A:00 X:24 Y:8C S:F9 P:nvUbdIZc $DD1D: A9 01 LDA #$01 A:01 X:24 Y:8C S:F9 P:nvUbdIzc $DD1F: 4C 20 C0 JMP $C020 Breakpoint 1 Hit at $F48F: $F48F:EC--X- Condition:$0411==#01 (7012 lines skipped) A:00 X:24 Y:CC S:FB P:nvUbdIZc $DCD6: DE 00 05 DEC $0500,X @ $0524 = #$18 A:00 X:24 Y:CC S:FB P:nvUbdIzc $DCD9: F0 74 BEQ $DD4F A:00 X:24 Y:CC S:FB P:nvUbdIzc $DCDB: BD 00 05 LDA $0500,X @ $0524 = #$17 A:17 X:24 Y:CC S:FB P:nvUbdIzc $DCDE: 4A LSR A:0B X:24 Y:CC S:FB P:nvUbdIzC $DCDF: 4A LSR A:05 X:24 Y:CC S:FB P:nvUbdIzC $DCE0: 0A ASL A:0A X:24 Y:CC S:FB P:nvUbdIzc $DCE1: A8 TAY A:0A X:24 Y:0A S:FB P:nvUbdIzc $DCE2: BD 03 05 LDA $0503,X @ $0527 = #$E0 A:E0 X:24 Y:0A S:FB P:NvUbdIzc $DCE5: 85 03 STA $03 = #$AF A:E0 X:24 Y:0A S:FB P:NvUbdIzc $DCE7: BD 05 05 LDA $0505,X @ $0529 = #$C6 A:C6 X:24 Y:0A S:FB P:NvUbdIzc $DCEA: 85 02 STA $02 = #$5F Breakpoint 1 Hit at $F48F: $F48F:EC--X- Condition:$0411==#01 Breakpoint 1 Hit at $F48F: $F48F:EC--X- Condition:$0411==#01 Breakpoint 1 Hit at $F48F: $F48F:EC--X- Condition:$0411==#01

https://datacrystal.romhacking.net/wiki/1943:RAM_map

0x0347 - Number of credits (not exclusively) 0x0402 - Gun selection (also used in ending) 0x0410 - One's digit in energy status 0x0411 - Ten's digit in energy 0x04F6 - One's digit in special weapon status 0x04F7 - Ten's digit in special weapon 0x0416 - Right bullet selection 0x041b - Angle of right bullet 0x0424 - Left bullet selection 0x0429 - Angle of left bullet

Disputed 0x0347 - Number of credits (not exclusively) 0x0347 - How many points you have to power up your plane in the upgrade menu Note: These descriptions mean the same thing.

0x0412 - Energy MSB 0x0412 - Hundred's digit in energy Note: These descriptions mean the same thing.

0x04F8 - Weapon time MSB 0x04F8 - Hundred's digit in special weapon