If you are still using the old URL (datacrystal.romhacking.net), please update your bookmarks! The old URL may stop working soon.
The current URL is datacrystal.tcrf.net.
The current URL is datacrystal.tcrf.net.
NBA Jam Tournament Edition (SNES)/ROM map/Titlescreen code: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
(added input values) |
||
| Line 5: | Line 5: | ||
<pre> | <pre> | ||
------------------------- | |||
here are the input values | |||
------------------------- | |||
org $16FC3A | |||
dw #$4000 ;Y | |||
dw #$0800 ;up | |||
dw #$0400 ;down | |||
dw #$8000 ;B | |||
dw #$0200 ;left | |||
dw #$0080 ;A | |||
dw #$0100 ;right | |||
dw #$0400 ;down | |||
-------------------------------------- | -------------------------------------- | ||
get total correct input amount counter | get total correct input amount counter | ||
Revision as of 04:04, 17 November 2018
This is a sub-page of NBA Jam Tournament Edition (SNES)/ROM map.
 | Note: This code loops through a series of 16 bit values (8 of them) stored at 0B7C3A [$16:FC3A] and compares them to player input. Then sets a bit at $16FF if entered correctly. |
Commented titlescreen input check routine
------------------------- here are the input values ------------------------- org $16FC3A dw #$4000 ;Y dw #$0800 ;up dw #$0400 ;down dw #$8000 ;B dw #$0200 ;left dw #$0080 ;A dw #$0100 ;right dw #$0400 ;down -------------------------------------- get total correct input amount counter -------------------------------------- $8A/8847 AE FD 16 LDX $16FD [$00:16FD] A:4000 X:0034 -------------------------------------------- use that as an index to get next input value -------------------------------------------- $8A/884A BF 3A FC 16 LDA $16FC3A,x[$16:FC3A] A:4000 X:0000 ----------------------------------------- compare next input value to current input ----------------------------------------- $8A/884E C5 88 CMP $88 [$00:0088] A:4000 X:0000 $8A/8850 D0 12 BNE $12 [$8864] A:4000 X:0000 $8A/8852 E8 INX A:4000 X:0000 $8A/8853 E8 INX A:4000 X:0001 $8A/8854 8E FD 16 STX $16FD [$00:16FD] A:4000 X:0002 --------------------------------------- compare to 16 decimal (8 correct inputs) --------------------------------------- $8A/8857 E0 10 00 CPX #$0010 A:4000 X:0002 $8A/885A D0 0E BNE $0E [$886A] A:4000 X:0002 -------------------------- code was entered correctly -------------------------- $8A/885C A9 01 00 LDA #$0001 A:0400 X:0010 $8A/885F 8D FF 16 STA $16FF [$00:16FF] A:0001 X:0010 $8A/8862 80 06 BRA $06 [$886A] A:0001 X:0010 -------------------------------------------------- wrong input, reset the total correct input counter -------------------------------------------------- $8A/8864 A9 00 00 LDA #$0000 A:FFFF X:0010 $8A/8867 8D FD 16 STA $16FD [$00:16FD] A:0000 X:0010 $8A/886A end