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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下
( U) ^# P9 @$ a6 q' y; c' q8 `$ i2 ^
- \ n/ D. U9 Y2 J: ]以下是主框架代码:
y/ D) p+ Z, f" J: g! w/ O- ;======================================================================, Q# T$ z3 Y3 {6 G, Y
- ;文件头
6 \4 j% j' c2 e* Z - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量& H: N# i3 K+ X2 {
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量
$ O! R; S Z# L( `$ s3 W: d$ D X - BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码
( { E1 k F5 t9 n) [ - ;======================================================================7 i0 K" i) ^" @! j
- PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 24 e) K/ t3 i& A' z' D, ~' N5 m
- PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1, s' B" C; @1 y" t
- ;======================================================================5 t c- [4 f8 T# y, `1 U
- RESET_BANK = NES_16KB_PRG_SIZE * 2 - 19 c% T! \ G6 F _$ S
- RESET_ADDR = $E000 ;主程序起始地址
- H. R+ ~$ L4 _$ ]: s* j7 Y - ;======================================================================; a$ {$ q; }5 F7 k- a
- .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB
- x+ }! _) Q& @* T# g - .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB: J& c9 L$ C9 [4 ?! t. T
- .INESMAP 4 ;Mapper号 (0-4095)
' x/ T: ?! Z+ c) C - .INESSUBMAP 0 ;子Mapper号 (0-15), m0 t$ c+ K B2 u4 S/ i
- .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)
) @4 i. [+ F; p; i6 H$ U: g3 r - .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)
( m! c& F" K6 e& S8 M - .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)
4 k: l3 H3 e( w! E1 ]+ j - .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数) t9 u2 @& L/ H3 h; R6 X. }* ? U6 L
- .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)
% q8 S6 b W- K1 y7 ^! n. E+ e - .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)# l, P/ ^ f, ~5 l a# D5 i
- .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)
- K/ u, E+ t% E; v$ k, ?5 D/ M4 _5 G - ;======================================================================/ D3 [* l$ p" t$ I+ b
- .INCLUDE "fc_demo_config.asm" ;全局配置, A* d' g' k7 `. ~' H
- .INCLUDE "fc_demo_constant.asm" ;NES常量
# k5 i6 B, @* ?" w: o - ;======================================================================# I8 R+ \1 u$ L4 @
- ;音乐配置1 Z) C& r, H" M4 Z2 \, U
- .IF 0 = MUSIC_THEME . u9 f q3 J5 f ^
- .INCLUDE "data/music/Gremlin 2/config.asm"
! C+ _% Q( P6 B; ]# P4 E* e- h - .ENDIF
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- .IF 1 = MUSIC_THEME3 m% r' Z6 P% n! o3 i
- .INCLUDE "data/music/Raf World/config.asm"8 D8 n8 a. q- g# W; q+ ?8 ?3 b& D
- .ENDIF
( a- \( E& R9 j! X& \' b+ K Z - ) b6 V' W. ]) B" `
- .IF 2 = MUSIC_THEME % N I; H' B- r9 g% v7 W
- .INCLUDE "data/music/Ninja Gaiden 3/config.asm"
) y# W) G% E+ r; g2 H1 R3 g - .ENDIF
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- ;======================================================================# w8 C6 l6 x# ]7 @5 e, A
- ;引用CHR图像数据
" J o N% f- P - .BANK NES_16KB_PRG_SIZE * 2
J! {4 ~& P) Q0 p% }* _; g - .ORG $0000
% v7 F6 c2 X3 w3 {1 H8 c% c8 F( O - .INCBIN "data/bkg.chr"
/ h* [3 w' A% P# ~0 Y7 E( t - .INCBIN "data/sp.chr"3 r5 v, ^% p* o
-
1 n( ^) ~0 j" r0 a# S0 M! D - ;======================================================================$ f! O( Y; X8 K; Z$ L7 j y
- .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank- n9 Q9 ^$ ]' E4 N/ @! _# x
- .ORG RESET_ADDR; E' j% p* P0 _
- ;======================================================================5 F6 q' O4 P7 N3 ?
- ;引用其他源文件
1 o q+ I) C/ f! b# } - .INCLUDE "fc_demo_ppu.asm" ;PPU处理; ?# Y- @! Z- V \: ~4 u
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理# r$ _. \8 f, S+ O! x
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理
" ~( \( B- L- F7 ]! y - ;======================================================================
2 v) s& P1 ?" n, s% x# S1 G - ! {6 Y- o }% T) J% d$ ?
- ;======================================================================5 l& W3 o G) [# A/ p2 i
- ;等待VBlank到来" b8 p6 g" Q4 B1 ?
- Wait_For_VBlank
" p6 g) u5 `; j- o2 s9 o: x: b - LDA PPU_STATUS3 x& N% m8 n: f+ H8 } V) K: `; s, S
- BPL Wait_For_VBlank
8 \. Q& e7 V5 Y2 g3 J - RTS
( U9 x( x0 F) x% e/ A0 T - 7 c- y3 D/ g1 V6 O9 s9 e1 h
- ;======================================================================) }% I. r- `4 R8 I9 }
- ;调色板初始化0 F. _# k( X! Z V
- Palette_Init
* E" U1 M: b/ |7 \# } - LDA #$3F" r% K4 u9 t) I6 N/ H
- STA PPU_ADDRESS: n: e( H' w7 h; g1 \5 ]' d9 b
- LDA #$00
3 @- Z' D9 m. V1 V9 G+ t5 W - STA PPU_ADDRESS
/ q: @' @4 [ @3 e - LDX #$00& X: h+ O4 m" O' v: n ^0 P- X6 E
- LDY #$20" V# v# \2 l" n5 l4 H4 W
- .Write_Data
7 O# E: w% L, v4 B - LDA Palette_Data,X( _$ I/ U }8 j: a2 T% n* u( J. r4 W: G
- STA FC_PPU_Pal_Addr,X( \0 Q1 ~5 i8 T7 {
- INX4 F1 ]$ {# \8 A" I. e; V: h
- DEY
$ X. M9 f# h1 j: q2 D+ x z$ ` - BNE .Write_Data U$ K' \) ^5 p* y, v# {" k) W
- .End0 y0 x. m8 e* h
- RTS& o9 _9 j# ~1 o3 c2 C% Y, o* W4 \
- 9 M y. P! ?, f0 Y
- ;----------------------------------------
7 h1 @: h! a: V; m8 p - ;调色板数据
) k) u, x# C5 I$ T1 j0 \8 _ - Palette_Data8 q1 I4 o6 |' v" L8 Q8 W; x4 G; C- T: R
- .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B; N* ~$ [* U# ?8 f
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22
1 H1 C% k% s' r/ R -
# G) K$ n6 o2 G+ u, p. v0 E - ;======================================================================. ^7 s( m7 `+ X1 z# M
- ;命名表清空
9 K7 w+ ]8 B# `1 ~( `1 h - Nametable_Clear
1 E" ?* h1 a9 o/ m# [ - LDA #$20
1 f4 p$ P p% ?3 e, O U" u+ r - STA PPU_ADDRESS0 Z. f5 D; l" H
- LDA #$00
2 N. S# U' k+ ] Y7 G - STA PPU_ADDRESS
, s5 f- K. o8 Q8 h, q - LDA #$00- x9 M0 v1 ?* Q4 g/ s
- LDX #$00
& L; J$ n) O; W& \' @0 { - LDY #$08
1 h) T9 M$ y' l - .Write_Data
( N8 O1 D. Q* ^9 Y - STA PPU_DATA& p2 o! J | j. q' a' g4 u1 u
- INX# r9 u" M _; k0 P+ C
- BNE .Write_Data
; C5 V4 B) L! P! f1 V- z! K - DEY- G+ L" u7 n) U2 Q' B) w
- BNE .Write_Data/ I* r* ]9 a/ N! l' k9 l: C% q/ ^
- .End
* c2 z6 T9 Z/ S6 ` - RTS
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2 t2 x# Z x+ b, C2 F& Q S- ;======================================================================
. L/ l$ [" W# E0 A9 B% {6 ~# Y - ;音乐曲目切换
6 T% W; P* n' @ - Music_Select_Process; g# R" \: O6 z9 I# u
* y; C1 d* c9 I8 s# O* C- .Pre_Music;上一曲
7 V" @) Y1 b; \' r# x - LDA FC_Gamepad_Once
# I A: {8 S1 j0 f - CMP #JOY_KEY_LEFT
5 W9 F- K' ~1 p - BNE .Next_Music
- i- u3 F6 Q6 X2 U - JSR Music_Play_Pre
/ f0 k* O% y* i8 t0 M; D% d6 o - .Next_Music;下一曲
$ s9 \6 V% h' v1 {. {: k* f2 ^8 d - LDA FC_Gamepad_Once
" R: G/ b7 S5 F1 }/ t - CMP #JOY_KEY_RIGHT
4 J" C" H" k1 q- `- H/ A% n - BNE .Next_10_Music
) R+ C a. B! G2 M; I3 s( h - JSR Music_Play_Next7 j3 s9 y% @8 ]# \7 F
- .Next_10_Music;上10曲
& ~6 ~2 ~. y7 U) Y; r3 a - LDA FC_Gamepad_Once
- a& y6 k/ p3 l" i3 M - CMP #JOY_KEY_UP
" y3 S# n L. O3 D0 C - BNE .Pre_10_Music
6 M% G0 l- R& u) ?" } - JSR Music_Play_Next_106 ]/ i# K `& } a* V4 v: k/ G
- .Pre_10_Music;下10曲; J/ ]* c3 h1 \7 c6 D# W( H/ A
- LDA FC_Gamepad_Once
0 K- r6 p- }1 J% l) K' c0 ^' n' L - CMP #JOY_KEY_DOWN
" o5 h" z7 I) B) F b- l - BNE .Reset
1 V2 H9 m( B6 v% | - JSR Music_Play_Pre_10. ]. c% t3 \! u; Y3 \
- .Reset;重播当前曲目% C( m* t# \1 } G; d, N) [5 z; b7 y
- LDA FC_Gamepad_Once+ _& f' S& Q# c
- CMP #JOY_KEY_START% u( @( o( A$ i! |) |! j, | _ w
- BNE .End
2 C0 I: v& ^* {3 w6 C - LDA FC_Music_Index
! @- D; x* L4 q! E: @0 V: P - JSR Music_Init_Process: H; X- K$ q" W$ s9 [6 d7 v
- .End. B) T# J" ~2 X
- RTS
" C' M4 T$ J* L8 E& K7 T - : s, G; \, V3 I4 b7 I. ?! x
- ;----------------------------------------------------------------------
" h* a2 G! Z9 @" k - ;播放上一曲
( X9 Y( J. {3 Y' o - Music_Play_Pre! b3 g- Z; |* K' I- ^! {( e9 c
- LDA FC_Music_Index
2 U+ J/ b' f$ b f; L! h% U - BEQ .End5 z- a6 [7 v2 O3 m5 T) W; _' G
- DEC FC_Music_Index5 g2 N2 G2 M6 w9 P8 T8 h
- LDA FC_Music_Index
% K/ x' V6 i0 C4 D Z+ B - JSR Music_Init_Process
( O0 }, ~; z. b! ^/ ?2 P6 @& F+ l, O0 K - .End& |% o1 j5 `2 T- h
- RTS' I* I" J1 L( F @& W- Z
- ;----------------------------------------------------------------------
; G3 E- {; h. n# @$ Q9 [7 c( R - ;播放下一曲
0 e3 D$ ~9 b( Y1 [ x - Music_Play_Next
1 T$ m; r( b" t; c - LDA FC_Music_Index5 C; U' G, d1 T7 E3 z) \
- CMP FC_Music_Max_Index
' A3 |- w) f, Z4 Q3 f3 P) v* [$ n { [ - BCS .End
0 G" v I' l! W! U9 A# y- n - INC FC_Music_Index
) P: G6 I: r7 M' ?' K& d ?( y7 } - LDA FC_Music_Index* U" ? z6 @; \6 a7 [
- JSR Music_Init_Process# f- ~8 P J1 x0 g2 |
- .End
$ J7 A' @3 \4 E# x7 o+ N. Y7 L - RTS
; B% X- C- @) b/ a; c - 7 A1 Y* G+ t% {: ?2 e
- ;----------------------------------------------------------------------
- u9 I0 h6 e. ~9 k - ;播放上10曲
0 r& Z% @) v- H/ p - Music_Play_Pre_10( O0 Y* k$ V/ b, h6 x8 F
- LDA FC_Music_Index
, ~2 o5 X, o4 c - BEQ .End) b) o8 @- m2 d# }; E
- SEC2 n( I; e9 N1 a' D8 D( X
- SBC #10
$ b! k; ^. _& {1 l* z - BCS .Pre_10
. D! a `! k) L - LDA #$00
& f7 f- B% ~" E g - .Pre_10
) O( C0 ] n2 F d" ~) r - STA FC_Music_Index$ _$ @. }9 e8 |: O
- JSR Music_Init_Process
" O" h3 P# |- Z- m - .End. C2 X3 `; k! f: } v' w
- RTS
5 t" f- m. m# s# c" N - ;----------------------------------------------------------------------& c! b1 `2 Q8 V3 |0 [4 ?7 t
- ;播放下10曲( P; ~) o4 R6 A# \ }! ^
- Music_Play_Next_10
# E) D1 t3 |/ ~) z' F3 E+ ]. ~" b - LDA FC_Music_Index( c- m$ i% _" }4 b: e
- CMP FC_Music_Max_Index/ m) s! s6 O$ z2 ]) p }" B
- BCS .End
7 y. D+ s" c$ O$ ?7 |) j3 p - CLC1 z4 G. c+ u$ x5 V
- ADC #10
5 n# s3 H; o' ]7 w - CMP FC_Music_Max_Index
1 n0 f4 ?8 {% c7 L! [ - BCC .Next_10
7 u: C' ~+ a3 R2 H; `9 e, b - LDA FC_Music_Max_Index# Q; K8 p2 Z2 f X2 h! ] ~0 n7 M5 d
- .Next_105 G* n b+ u3 v0 A+ ~
- STA FC_Music_Index A2 |% N* P+ j8 J8 L
- JSR Music_Init_Process
# }# k. _4 k& \0 u# ^; H - .End: ?3 j3 J; s ^$ @9 ~2 y
- RTS
$ ?& E8 q. i# ^! f* c: s& ?# o - 8 Q, n2 V, ^/ ^/ M
- ;----------------------------------------------------------------------9 C* u' g3 U' G
- ;8位十六进制转3位十进制制: O( n$ B5 M4 f1 t
- Hex8ToDec& l) S. f _# d8 p& M
- STA FC_Dec_Data_1) P* X. i9 t: T6 `) ^% [- T" J# ~
- LDA #$00
. J s) g5 Y& |1 i - STA FC_Dec_Data_100
. o& F7 [1 h1 w& o4 e# l5 S - STA FC_Dec_Data_10
+ U0 p5 T& l; m3 I$ }2 r' @ - LDA FC_Dec_Data_10 P0 s- c" C: J4 l4 C; _3 \+ ]5 A# r
- .Convert_100
) |4 E% P3 C3 l2 M# G6 b - CMP #100
4 N! z6 |" h1 F; |$ ^4 P - BCC .Convert_10
, K" p2 ^% g0 k5 V2 m# A5 m% v - SEC
* v- R# s9 }. z; X; x5 B; S - SBC #100; p3 j) R8 U6 @% r, \: y
- INC FC_Dec_Data_100. h) r9 D& |, ?
- BNE .Convert_1004 Z C0 E+ e* [$ P
- .Convert_10
9 X4 r; R% P$ I1 j6 l2 [7 x8 s - CMP #10
$ k+ m" V. ]4 J& \& i - BCC .End) s4 B; K. W; W, {- v5 v
- SEC, O" K( {$ o+ A
- SBC #10
# v/ A3 D; R- b& M m, M$ G - INC FC_Dec_Data_10% b( |' m6 p. j" `: o
- BNE .Convert_10
+ g/ F1 l% }+ E5 i8 s% O - .End! G. C) t" |, R( W; I" |
- STA FC_Dec_Data_1$ Y. u' h% V; C; V
- RTS9 q2 J+ u8 w: e( R: ]: R
- 2 v# H' ?# I! P4 n
- ;----------------------------------------------------------------------& y& g/ }, F4 O: X: h. C
- ;显示曲目信息
; i( {9 v9 L( n! j - Music_Info_Display
! {- p# [7 H7 F8 ]* x% M - LDX FC_PPU_Buf_Count
o' t4 H/ }0 {! l+ S - LDA #PPU_WRITE_MODE_CNT_LINE. f* j4 G+ X, H2 z7 ~/ T* F7 E# |
- STA Use_PPU_Buffer,X& r; V/ g, [8 A9 m K. j+ K
- INX
O& z: Y4 K# v -
% a& z" A5 ]& R1 j+ l& P; V+ e - LDA #>MUSIC_INFO_POS$ J) }& C% a6 B8 \* u
- STA Use_PPU_Buffer,X
. K( V8 m, L2 K1 t0 a" C - INX
. M' e6 s' i4 i" ^3 j1 b -
9 }: v, Y5 i3 ]; r% [. I/ T, k- b - ;居中. ]* ^) ?8 n# G4 \5 X5 a6 Z, ?
- LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
3 B1 I- `7 R5 M) x/ w9 ] - STA Use_PPU_Buffer,X w. p% l: N5 o
- INX( V$ F+ ]: @4 Y5 r2 e$ T% ?
- 3 f9 O$ n4 F. J7 u7 `! X
- LDA #$05; @0 F; Y5 E U u" }7 `% U1 J
- STA Use_PPU_Buffer,X' k: X2 o( W2 \1 m z! n
- INX; s& i8 C6 ^! e# z* {
-
/ z, v( ~9 n7 ?, r - LDA FC_Music_Index
+ U9 P7 [% i/ y1 t; m - CLC6 g1 x0 j0 x% ~8 u% v1 t
- ADC #$01
/ Z/ { w* j7 _- n g) J5 X - JSR Hex8ToDec6 x) m( H8 _9 l" ?$ c# D
- " a8 j2 z2 @1 U+ J9 c
- LDA FC_Dec_Data_10
1 J1 x" K2 H- N" c7 B - CLC
5 j2 G9 X3 _/ x - ADC #'0'3 J8 V% q4 e& }5 D' }# a$ Q$ B
- STA Use_PPU_Buffer,X6 V' M5 Z. @/ N4 V
- INX
0 P' H5 `5 T0 ~ -
! ]8 I2 a2 P/ P3 w; D - LDA FC_Dec_Data_1
( d. e. A9 [0 {5 z% z" |6 i - CLC
* M1 x& F/ O! W$ b - ADC #'0'
/ H2 }' o) m2 O- S1 h - STA Use_PPU_Buffer,X3 Y& X0 U9 ?: l1 ~8 E. v
- INX
/ a* ]5 w g4 _) d: a& @ -
4 L3 r9 ]; v t# D a" a: D# ?% u+ [ - LDA #'/'! _% B+ |! V4 N
- STA Use_PPU_Buffer,X
/ C) H1 |# Q: u2 [2 L - INX8 n$ l# F, G) Q/ x: w3 l
- 5 S( S0 t* d. n6 S% o' ^. P+ j+ g. Y
- LDA FC_Music_Max_Index9 |3 D) U- z/ s5 L
- CLC/ h& e" e/ E- o; \6 X6 U
- ADC #$01
6 d0 F( \& w& L f; Z1 q% N - JSR Hex8ToDec4 \/ N; Q- T+ q/ J4 a) X& J) v V
- % T1 F3 N2 m& ~: R
- LDA FC_Dec_Data_10
- E3 A3 V1 |3 t J+ {6 D; A - CLC" K+ ]' J- @- z8 o# X
- ADC #'0'6 c" U4 n) S4 R% e2 ^% L
- STA Use_PPU_Buffer,X
* n; x5 x6 m8 o& a - INX0 \% A& w( X0 e/ J& {/ l) w5 Y7 l
-
$ @4 R9 Q' W# Y7 j3 R0 _ - LDA FC_Dec_Data_1
+ L) b+ B2 x5 ]& A* K# x5 r. x - CLC
3 i5 n J, s, F9 f: @0 `/ o - ADC #'0'
: _) D6 B: U( m6 w3 w/ {3 G - STA Use_PPU_Buffer,X
( L" \$ p; E6 `$ P" d& i( F" A: { - INX
5 h8 ~7 }7 L8 i) ` - # J: Z0 f% ^9 P4 H/ R& C F& Y; M; h
- .End* f: y; b4 ]. N/ j1 \. y- B
- STX FC_PPU_Buf_Count8 s4 T( W5 F: [" M+ G( I& N
- RTS; l# [) _. Y5 `2 g4 W; {0 U F
- 8 u! e* M+ G2 @6 W0 B
- ;----------------------------------------------------------------------) `' n5 S) w3 S
- ;音乐曲目初始化处理' ]8 x- U# q4 Z, i
- Music_Init_Process
0 p/ e2 @* ^) A8 ~4 l& Q - PHA
+ z9 W7 M5 |8 y" ~ - JSR Music_Clear_Process7 h6 O# p4 h8 s& O6 h+ ^
- LDA #$1F
- a7 o& m2 @* h. [% q - STA $4015/ B% o0 h3 o& h" q- y3 T0 A+ `
- PLA
1 |- v& G3 H6 W, G V) X9 [; K2 B - JSR Music_Init_Addr! p% t) o" {/ @) q
- JSR Music_Info_Display
$ _& T- [ G% h' p+ H: N% g4 M4 } - RTS
. e3 S6 d* p" |- r M* y9 q - * _/ w$ Y5 J! C9 X) x/ G$ O: t
- ;----------------------------------------------------------------------
& {5 q+ {- Z @; W; ? - ;音乐播放处理
! n$ c3 q g5 F3 F& n3 W - Music_Play_Process% E- z- W. _+ R7 ]/ I8 {
- JSR Music_Play_Addr
% \. Q' z: O! \6 l6 R% E6 ^& F - RTS3 R' {2 c' q: }8 V/ ?& f
; P4 d6 C. `2 `7 {$ n/ L- ;----------------------------------------------------------------------
/ B6 X2 w8 R& `5 _ - ;音乐播放处理
. B9 H& E, [7 W - Music_Clear_Process
+ j: g G. N; u+ X: @ - .IF Music_Clear_Addr
: L& N' L3 L/ p: F9 b4 S# Q - JSR Music_Clear_Addr! e: y: p# }; i- X6 _& L" D+ x
- RTS
$ @. N" c9 q: e, U" Y9 G% ^ - .ELSE/ x: b# N! c) W1 m9 i5 @) x) ~2 a
- LDA #$1F+ a! G+ X4 W; R
- STA $40151 ?. C2 H4 Z, d. h% t8 T
- LDA #$00: o2 j' D5 b6 t! |& V7 a
- STA $4010' x! V: @2 X/ f6 ~! J* U, ~# P
- LDX #$00+ M1 L8 j* ?9 s; L! Z/ {" I4 M
- LDA #$00
4 {, S- P8 K4 N3 t: H+ {% e -
' P4 q; A, S2 S - .Music_Clear_Zreo_Page_0
" @0 S, ]% ^4 \4 W. V+ c: Z - STA $00,X- Y$ r& e$ i. z* V3 d2 _% l! G; ^
- INX; ~& b. ^8 ?5 C% b- Q5 m
- CPX #Use_Zero_Page_Begin
+ L) a1 o' O( Z6 l - BCC .Music_Clear_Zreo_Page_00 [) E! }1 R" @* y! f) w
- 5 K, t, V: U) D- r1 X- }! k
- LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size4 V% Q3 |" {1 C' Z! ]5 [
- .Music_Clear_Zreo_Page_1
! L+ T6 s; T; K; R2 F - STA $00,X$ T8 {" C( z! c0 o3 \
- INX9 }: X' |) b( d! P8 M, b7 ^5 B
- BNE .Music_Clear_Zreo_Page_1
# ~. G! K3 E! [+ _6 P# ]7 Y8 W) b -
% S" p: E1 ~2 n# Q8 S0 V - Music_Clear_Process_1
) h; Q- ^/ h Z k5 o - STA $0600,X
$ g; P- Y" z: O1 m6 A4 C - STA $0700,X
9 @0 G1 o4 o4 K - INX
8 }6 Q. q/ @4 F9 S! m3 A% M G. H - BNE Music_Clear_Process_1# E* O2 j4 }. R* Y% W
- LDA #$105 ?8 @" J2 @7 m2 q+ {( n
- STA $40004 ^' {, o E% f; q; T5 f% }1 W
- STA $4004
5 Q x5 X" C: f% e6 N, i4 c - STA $400C) m" m: I6 M9 J1 W j+ ]
- LDA #$00
; K' ~( m/ l( a - STA $4008
7 y( Q: u; g* |/ q: C4 Z - LDA #$0F
, ^' [5 m+ e4 }0 ] - STA $4015* B) @. r4 k/ `& W3 u' o% l
- .ENDIF
: I: s8 m' g" t) f: h - : m( s$ [3 |+ Y& u' x3 b" s$ q
- RTS
) u3 Q1 b2 d, c; ^8 Q2 ^& G
6 {! `; Q0 B# n+ F; @$ {- ;======================================================================# g' ^, w5 c: S$ O
- ;重启处理
+ g }! f& \ R+ j& y6 Q% v; u9 S - Reset_Program
* v) K. z2 b. R% h - SEI
/ U1 h+ f7 r. c c - CLD
0 L" C( w9 f: S$ g, \& Z7 a - LDA #$00
: V$ n% h0 O4 @- Y! b - STA PPU_CTRL6 m* o" {+ E2 ?" f. f: I! K$ s; f
- STA PPU_MASK. o, T$ |& _5 `; p% u
- STA JOY2_FRAME
( u% z9 n% i. f3 L6 Z; v - STA APU_STATUS
: f B e, E! r+ X! e7 ?3 Y" S - # j1 K' P/ Z; y. }. a! x
- ;等待屏幕准备完毕/ Y; S3 G3 {) s) C8 Q6 g
- LDX #$02
& E u) b; ?4 M6 B: Z - .Wait_For_Screen_Ready/ f9 ^5 d' E% f3 Y
- LDA PPU_STATUS
1 A" L6 u1 K4 p: x0 B, B6 T - BPL .Wait_For_Screen_Ready- Y8 k: a D: m |& f
- DEX
; ~! _2 K) Y) u( Q, M - BNE .Wait_For_Screen_Ready+ A% _4 E. r L( d1 _ |
-
5 t) u# q* k3 q. ~ - ;清空调色板
! O/ t- i& {$ y6 m$ F) [( B5 z - Palette_Clear' P- A! B+ q: q" v9 A8 [- G
- LDA #$3F0 U, O- Z4 H8 ?
- STA PPU_ADDRESS3 }, ^" }8 X3 W+ ]! a- Q3 Q
- LDA #$002 V5 Q6 q4 I/ |; D( K
- STA PPU_ADDRESS
: f8 P- M. U+ Q3 @ - LDX #$20
) E2 H" v4 j3 n2 q+ t! T, e - LDA #$0F
o( P) V- U0 F5 v3 k. g - .Write_Data" \: a6 z* C4 r G! n* Q1 L
- STA PPU_DATA/ e1 G+ J; z' ~* J! C. [$ W
- DEX
2 o, G9 [/ F5 n. Q( R - BNE .Write_Data8 I5 B8 X; [; B
- 8 w1 J9 E4 I& _+ w/ s8 p
- ;清除声音 $4000-4013
3 I# x; \9 j# G5 p9 Q - LDY #$14
2 I. d( p, a# W% Q - LDX #$00% Z% u1 G7 I+ S
- .Sound_Clear X6 ]/ H* t/ q# T( }6 f, d
- STA $4000,X
# `% _0 x0 T0 o$ G, n - INX$ l8 T, j! c" g0 ?/ A
- DEY. f6 ?$ a" B' J: t* N
- BNE .Sound_Clear
: a' Z1 y' P, l0 _, ?7 I8 S! d7 [ -
1 m& L$ A( C& l, ~3 X- V/ Z- J - ;清除 RAM $0000-07FF: {4 U: ~7 _# s
- LDA #$00
* Z9 v. S( L9 p3 Q, {: b# [ - STA $00" Y' A+ c _& H1 ]" n" _
- STA $01
3 B; c! U, F! w - TAY+ {5 j- Y: k- z, b6 I7 m5 X
- LDX #$08 P) S! [- U* G& p
- .Memory_Clear
7 T& Y, y* Z2 d0 v$ W' z6 A - STA [$00],Y
7 ~ F1 Z8 x' g4 }. _. T - INY
* W9 c, l/ ^6 x6 `6 f% _0 } - BNE .Memory_Clear
! \6 ]9 V: x# g" M* H' ] - INC $015 r9 q( A9 V. [
- DEX
( O/ ~1 J* G; R/ s( m4 j2 L3 E - BNE .Memory_Clear1 U# ]" i# V( y1 I
-
3 \! U5 L0 g! F - ;精灵缓冲初始化
7 m( C# r' y' }9 s" W* g - LDX #$005 {) Y" `. `7 E/ O8 F) l. @# C
- LDA #$F8: Q/ E- x. n: c# B2 @1 W
- .OAM_Clear$ x& r& T ]: I1 K, q8 h
- STA OAM_DMA_Buffer,X9 h6 P3 f7 X+ i: J; ]( |- P
- INX
1 Z2 `( t+ z& j' U, y+ h2 X9 @ - BNE .OAM_Clear0 F8 i4 `% \7 W ]3 ~% }
-
% K% C/ z" F; a3 `! t$ G3 Y - ;栈指针初始化/ V0 X" R% k# {. O( w2 j- [ E
- LDX #$FF
' W8 L2 I( N2 n" z; O - TXS
3 B: [7 H3 ` z4 k -
5 C# f- N; [# q- W5 ` - JSR Nametable_Clear;命名表清空; _1 q) H7 s3 v* w1 m: V
- JSR Palette_Init;初始化调色板缓冲2 X1 f5 ]0 U; K5 B; j' l+ w
- JSR Static_Text_Init;初始化静态文本2 z! P) C* a" P# @
-
1 d& T, @0 W$ C* q9 v) ^0 s3 ? - LDA #MUSIC_ITEM_TOTAL - 1
: u3 \) \5 [: u/ m: }* b - STA FC_Music_Max_Index
7 ] m, i; I Y/ F -
4 T3 Y' B& [7 `$ @* `$ p - LDA #$1F
+ F6 b$ Q' v2 c% J; X - STA APU_STATUS! u3 s8 S' [! @) B( v: ^
- LDA #MUSIC_BGM - 1
8 H$ M' J* J% k: T7 s2 ^ - STA FC_Music_Index+ E+ s h0 D) R/ g* n$ `% v
- JSR Music_Init_Process;音乐播放- y7 |9 j+ l; G; _
-
9 m! }: f5 `) j5 L9 i0 X0 u: {! j - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)* I% n$ X* {+ r8 i5 R) n
- LDA #$1E
! Z4 o0 O* k) I% s - STA FC_PPU_Mask_Buf
3 k8 N5 j9 r% R0 R - 9 `6 \+ `1 y) T# j
- ;启用NMI处理2 K) m6 S: P5 w2 p
- LDA #$80* G& t/ q1 I; s( d8 ~. E8 N
- STA PPU_CTRL4 j( v$ ]* Y% v8 j+ F5 t2 V( v
- 6 w3 F8 G: {+ U4 s( i. h. t
- ;程序循环, 剩余工作交给 NMI 中断处理
! j9 R D* {. l# U0 { J - .Loop
5 Y# F9 S& U! o) e - JMP .Loop7 f K" a6 a3 E
0 L1 h, q, l- C9 S+ V- ;======================================================================
. b' L9 |, v, R - ;不可屏蔽中断处理3 ]% F0 A& ^# i& F$ }* N; M
- Nmi_Program
$ O; G5 ^' e4 D+ M. T j9 X. S" T - PHA2 {# w* T& F( a0 D, D3 k: a* q
- TXA& ?2 t2 c3 l0 Y4 k- ~7 t
- PHA& E4 ~7 z9 @$ f0 _2 O3 E6 g( v
- TYA* S$ q% l; Q! C4 O7 b
- PHA( J O5 J9 ^/ P/ t0 n# W
-
) k( b t$ z7 e& E( f - LDA PPU_STATUS;读取使得 PPU状态寄存器复位
& M' b# N6 P4 m) |8 o& f$ y4 R -
- t% q7 E' k- Q - JSR FC_PPU_Procrss;PPU处理" r0 L9 r% K& c5 b3 Q# m8 a, ^! @6 C
-
& W; }8 d) i; t - ;精灵内存更新: Q- O7 q8 v. o2 q% z5 r4 k
- LDA #$00
3 H( \& R$ [4 }' x - STA PPU_OAM_ADDR
- X# P) Q3 f- j: U- b - LDA #OAM_DMA_Buffer / $0100
/ @; ?) D, K2 N- R - STA OAM_DMA
& {% N' ^0 H& B; D - 8 f- z S: i; [" a: J" ~
- JSR FC_Gamepad_Process;手柄输入处理+ d; k6 @+ m5 c. m
- JSR Music_Select_Process;音乐选曲处理0 C) A9 S" _ `# V, H- X. a
- JSR Music_Play_Process;音乐播放处理
. l) ?' X# I; L8 C# Q3 |0 x - 7 B" l: _$ ^! Y+ Q' T/ i. x* w; Z9 N( a
- PLA
N$ t2 R& P d* K* r7 T* M& m - TAY* |4 X1 G* n a7 E4 I
- PLA
. p1 D/ V. A+ u5 G9 X- K$ a' ` - TAX" j" ~5 b9 i6 g- k+ P
- PLA( r+ E2 z7 L. W$ o/ w/ t$ n, r
- + T/ Y& N3 h: m9 h) f$ a
- RTI/ i# V" E# `- _# d5 Z$ `
& E3 y+ j2 m. m! k2 ]1 r7 E8 g2 G- ;======================================================================/ Q: c# I* n$ {$ \# g
- ;请求中断处理
) o+ d1 f' x! a3 c2 z - Irq_Program
" W& e7 h/ V# H; \) [0 Z# k - RTI
6 A' E$ Y& K% l- I: K4 P2 } - 6 \0 \! D& R9 k7 l! _( I! A
- ;======================================================================- T9 T+ L ^3 d0 H. y0 f1 M
- ;中断向量表2 V; L% M7 y: B' D* ~+ l
- .ORG $FFFA
4 Q7 x- T0 y9 X: A- W - .DW Nmi_Program ;NMI触发时执行7 |. w' D+ i5 F! y$ W' }
- .DW Reset_Program ;载入ROM时最先执行
8 X7 {, A. c( ]: c3 D6 R" N/ O - .DW Irq_Program ;IRQ触发时执行
1 T0 N( {6 J. n! H" X5 {
复制代码
4 u& A: i6 A/ K% _
6 {3 _# Q4 E7 ?
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