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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下
( h/ p* ^* `/ |7 T. c* m& z
& _2 n$ {) ^) ]" d$ H4 s以下是主框架代码:1 Q, y7 Y) t! N
- ;======================================================================
3 M) P3 m+ {9 F) s: ^- n: r - ;文件头
* v' P* Y* ^' u - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量* I, K1 k: g) ~2 }
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量5 w& \; L7 P4 c+ {8 f! c
- BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码
: Q7 H' m# I! ]2 N. L& N0 w - ;======================================================================
1 Z5 z, D8 U4 c; | - PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2
6 J) |3 R" _0 d. d - PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1# t, h1 j8 A0 @# y7 y
- ;======================================================================
7 U3 s% W7 J) G9 } - RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
& C8 Y- p2 T9 l: v5 f% g( Q( k2 O0 L - RESET_ADDR = $E000 ;主程序起始地址
/ o Z6 _- I) M9 k5 K( q& R5 Z# D - ;======================================================================" s/ ~- ]# D4 H- u
- .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB$ N' m" F0 K' V( B& W" x2 j# r
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB
$ k& }$ F9 V/ S" V - .INESMAP 4 ;Mapper号 (0-4095)
, {) H# o6 }* k9 ^ - .INESSUBMAP 0 ;子Mapper号 (0-15)! K7 B% a3 t% p; c }# a+ i
- .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)
: N+ F# e/ K% }# t5 n - .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在): I' ?8 k+ X h* ?) o# B
- .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)9 {& p& W- P U4 U4 d' W
- .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)+ |7 G9 l" J! J* E
- .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数); s: \% r; N4 A+ X
- .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)( D, q8 L! E/ p/ \$ [$ V% @
- .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)
`% [. T2 I! ` - ;======================================================================6 B- X/ J: x3 [# M/ t( D s Z X
- .INCLUDE "fc_demo_config.asm" ;全局配置3 I9 m+ x; L3 K d) J
- .INCLUDE "fc_demo_constant.asm" ;NES常量
# G4 k0 n# g& T+ x& J" ? - ;======================================================================0 d8 N- ^6 w3 L7 ^; K/ \
- ;音乐配置" L" u8 L" }# C% c8 d
- .IF 0 = MUSIC_THEME
+ {/ J% `3 W$ I- p" d* c, s - .INCLUDE "data/music/Gremlin 2/config.asm"0 d, a# j* B0 I6 n* u. b1 s
- .ENDIF$ o8 w) {6 N- ^8 s7 ^4 B6 G& t
-
( S, J5 |0 E* b# u. K - .IF 1 = MUSIC_THEME
, T0 Y6 T* b2 ~+ a - .INCLUDE "data/music/Raf World/config.asm": @7 t6 @! ?" `. e' m, K, S
- .ENDIF7 V* |/ T9 P, |. q, r+ r: s
- , F, s$ {. k) `1 S
- .IF 2 = MUSIC_THEME ; n/ `# i1 ~6 l3 I* d( H8 V/ c; B. Z
- .INCLUDE "data/music/Ninja Gaiden 3/config.asm"
! Y1 @7 U* h/ \" D; L, F" X - .ENDIF
5 _ o% {0 D1 m# G, @
! i h4 \4 {1 W- d& { x- ;======================================================================
; h5 a$ a3 m. C - ;引用CHR图像数据; ~8 G4 }: [$ r3 V
- .BANK NES_16KB_PRG_SIZE * 2/ j/ z4 Y7 n7 `6 c" i$ X0 ], w
- .ORG $0000
/ H, M) N- C+ j2 x5 Q0 r* e: W - .INCBIN "data/bkg.chr". U( m% j: f& t" t( P/ A
- .INCBIN "data/sp.chr"
( ]) B! Y: ]) i, b6 B -
" `4 u2 x7 l. c% _' z6 a( W8 x - ;======================================================================; R, h- r7 u$ g( J9 a- p$ h
- .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank1 I$ Q% T5 a* O/ @1 S
- .ORG RESET_ADDR
: ?7 q( S5 _: a3 q/ n - ;======================================================================
! ~, G7 ~0 m: R& a z5 _2 A - ;引用其他源文件: z0 q# y: w, n: P
- .INCLUDE "fc_demo_ppu.asm" ;PPU处理7 n) u) ^: v' s0 p3 Q
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理; }+ z+ Z4 l: \( l' P
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理
+ a% W% R( Z3 ^ - ;======================================================================
2 t4 R4 U$ P6 m- c3 w4 i
" p! D H4 h5 a: C1 L( j- ;======================================================================
$ }$ D9 ~. q" F! T( ^! o) K- I - ;等待VBlank到来
/ e$ \- G& i, Q6 t: `6 ] P - Wait_For_VBlank
& v6 I; Q, R, |& l7 V1 o - LDA PPU_STATUS
; n v3 _$ J; e; N' i, P$ J - BPL Wait_For_VBlank7 M5 r7 n& M8 B6 N" E+ ^9 s; z
- RTS1 R2 g3 W- S8 K+ F- T! P
* b% i* c' f. n7 J- ;======================================================================
7 V% O9 q" f+ m2 V4 j$ [ - ;调色板初始化
, \5 c; V/ Z& ^0 H; v3 ]$ s - Palette_Init( C2 S$ P6 _, x9 {, ~' u
- LDA #$3F
# H; z8 D }/ ]! S7 X9 B2 h% [ - STA PPU_ADDRESS$ @4 I/ Q K* [8 D/ V: j' a# L) U
- LDA #$00/ N$ e9 o* p' ^6 a
- STA PPU_ADDRESS1 {0 G1 n# W- ~
- LDX #$00
1 t$ q9 A5 W3 }2 v1 a9 x# ?3 o - LDY #$20
% J+ W Y2 i' C* o - .Write_Data! F u8 G1 q/ j: w; N/ M2 b& X
- LDA Palette_Data,X1 Q: h" V4 c, a8 k
- STA FC_PPU_Pal_Addr,X$ _" f! W7 C2 V* ^ f4 _6 j' E
- INX
* Z# Z) I0 p7 S - DEY+ o1 k) d6 c: v4 X, O: y) \9 L& }/ P
- BNE .Write_Data1 n8 L5 ^! F H' N9 V3 \
- .End
+ Q3 A, \: n$ f+ c: p8 U" n6 | - RTS
2 h; R; p: Y9 m2 Q
! S3 E% h" x/ H4 P7 I2 K: }2 i- ;----------------------------------------
9 @- V& I3 p' f8 \3 j2 S - ;调色板数据
. ^2 T+ y: O! f! w. o i - Palette_Data- @4 ?" ]) V; b9 R7 S+ s$ c* l
- .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B8 r$ a' ~- ^6 S( l3 S+ A
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22
: l) W6 Q# o" F - 8 s( J1 K) `) @' A0 v* b
- ;======================================================================
' s' c" {5 S" Q% m - ;命名表清空; x E9 `7 V1 \5 k* {$ F& f
- Nametable_Clear
" d3 ^7 R3 ] t1 \ - LDA #$20
+ [+ j7 `( x4 W2 t% }+ K% ~& \ - STA PPU_ADDRESS
* a G8 H, Z! H1 q - LDA #$00: d ~ h- k- s6 b5 E
- STA PPU_ADDRESS! h1 U' w% j2 g( H
- LDA #$00/ I( w( n! f9 ~4 X! P
- LDX #$00
. p) Y7 Z m% a6 n - LDY #$08
6 x* r& o( D5 p2 n6 A; {' X8 A7 C" w - .Write_Data( y/ I% ^: H; J% k2 w2 V; H
- STA PPU_DATA) {0 D M( C! m7 f6 \, H+ ^) m
- INX+ c z' j# L8 a# c
- BNE .Write_Data/ o, _( @# H; K) V) J( Z' y
- DEY' r8 D: A) l% _ a+ {# d
- BNE .Write_Data: x7 \+ `1 S8 X
- .End0 g; Q& i4 m8 f$ i0 i8 m1 B" V& P
- RTS9 C3 g- m9 b- y1 b Q, J
- $ |3 e: X$ t$ M* u" ~' Q) j. P) j
- ;======================================================================
9 V% Y" p& ?* A- t1 ? - ;音乐曲目切换- J0 P w) @. Z3 |
- Music_Select_Process
; k9 q2 O2 Z, F# d0 Y: V
+ P) r; O+ q6 o5 u! B' N" p% V {- .Pre_Music;上一曲
/ Q' _) r' S P8 l1 K& t - LDA FC_Gamepad_Once0 t; w" b' G+ y8 k6 p; c
- CMP #JOY_KEY_LEFT" V1 b, R: \( Q# w
- BNE .Next_Music6 i4 n8 z* p) S$ Q0 h6 o1 W
- JSR Music_Play_Pre1 s# g7 v3 X+ e) p$ w3 }
- .Next_Music;下一曲" f: q, U$ W% l, y; T: a5 k. O: @
- LDA FC_Gamepad_Once
) K% N& N6 d N! {8 P8 W5 T8 j - CMP #JOY_KEY_RIGHT
" n: W- y: J J4 D* n1 z - BNE .Next_10_Music+ j, P( y3 ]: H: f$ c3 B4 ^
- JSR Music_Play_Next
+ g6 j, x: v+ H* p0 j$ p2 S& E - .Next_10_Music;上10曲
1 |% i# Y* s. _, v$ D - LDA FC_Gamepad_Once# L$ N# p9 z. V7 g3 a
- CMP #JOY_KEY_UP
$ y. }* V! R- G0 B - BNE .Pre_10_Music2 n1 q6 |6 e! V: q" t
- JSR Music_Play_Next_10
( e. x$ v4 f; B. M1 B# R: Y- { - .Pre_10_Music;下10曲# ~+ d6 l* s4 e/ v7 V
- LDA FC_Gamepad_Once
8 g1 {% f# d- |" l; |8 V( @6 O# t - CMP #JOY_KEY_DOWN
5 S! }8 D# p+ ` k: |* v% i- B - BNE .Reset% v0 b. j0 m; X8 |9 Z# |
- JSR Music_Play_Pre_10* }6 n# Q% a! A$ a
- .Reset;重播当前曲目
, R9 s8 P3 \8 G - LDA FC_Gamepad_Once( M4 }, y' I, p7 f6 n
- CMP #JOY_KEY_START/ g# M8 Y; P; H5 O9 Q8 ~" P2 z+ c6 d3 D
- BNE .End0 J. R" [$ z+ L" \. K0 P
- LDA FC_Music_Index6 y/ |2 W" G8 c4 }0 m
- JSR Music_Init_Process
: g' X N* V5 D8 b - .End- P- @7 C m6 [6 |; Z
- RTS; ?! \% J2 w8 d4 z+ x
( C* N4 t! y9 f3 g6 j/ a, y; I- ;----------------------------------------------------------------------7 F; K8 ^3 E( D7 A2 _0 }
- ;播放上一曲# _! p/ _0 ]# }4 Y8 ?# z
- Music_Play_Pre
/ y; F! k& F3 {% z$ Z5 F - LDA FC_Music_Index
4 `; d; S& G" k& [ - BEQ .End
! @' }! \/ E& l9 O) G - DEC FC_Music_Index/ M' E* N- A, p( c: p4 J- \ A
- LDA FC_Music_Index
9 Y0 N4 `# A R" ^ J - JSR Music_Init_Process
4 E. |( |6 e" O$ k$ X - .End
& \" ?# ]( H' |; b( G) Z' k3 S: m - RTS m8 p7 r7 o7 j9 W& M5 B' i
- ;----------------------------------------------------------------------7 A& q% Q! M) G* l/ `) d
- ;播放下一曲
* v6 [+ j& |- J" i7 V7 d5 o( l - Music_Play_Next$ n: w& l) L$ p; \# q* m
- LDA FC_Music_Index
) ~1 h+ ~$ s# |% [/ c- h - CMP FC_Music_Max_Index \- Y& z! F6 X! X7 v
- BCS .End
' \3 ~, P/ e t5 s - INC FC_Music_Index
0 q" U/ |! h; L% z/ C - LDA FC_Music_Index* D( u( T' `* n9 A+ h& Y4 ~; w
- JSR Music_Init_Process/ d' _9 T+ w7 m' E- N y* @: ~
- .End
1 F% p+ p4 F& ]: _0 Z$ z5 b) i( C - RTS
/ a" X' ?+ P5 W: `: E9 d9 r
5 ?8 z; e# Q9 c# P- ;----------------------------------------------------------------------
+ V/ S/ N2 D* N' O' | - ;播放上10曲3 f1 I& u D4 W% N1 \# I
- Music_Play_Pre_10
9 t0 }9 X1 a5 Z8 y, ~6 {% ~# M - LDA FC_Music_Index
; A! y4 M, G/ ?1 Q" R5 [ - BEQ .End
, |+ p5 M% p( n3 q! m - SEC
' \, j6 D/ M% e" s - SBC #10
$ D8 C1 Y" Y8 U" S - BCS .Pre_10
! O \# |7 g+ s. Q$ j7 S+ m z - LDA #$00
. P6 r" G- a) O! B - .Pre_10& \) o0 A: E) n2 v' F
- STA FC_Music_Index
- A' F' R( m' e% v) w# p - JSR Music_Init_Process
$ E0 A/ V3 I5 @+ j - .End
# j N* `, k, y' h - RTS
& I, |0 X% g s1 c+ _. n( Y - ;----------------------------------------------------------------------
2 G O! ?3 U3 H3 {$ w - ;播放下10曲: a. Z' q0 `7 i0 C+ d' L, c- ~
- Music_Play_Next_10
, I! R v( w5 P P - LDA FC_Music_Index' W+ H1 C' c( E0 U
- CMP FC_Music_Max_Index- G" u1 I& A5 d. i: a6 f" S
- BCS .End
* d9 p$ Z: w& X+ o - CLC" W& b; H& p4 g. A0 [, G* \% x4 S' ]
- ADC #10" J; `, Z% g( \( m0 ?3 a- L
- CMP FC_Music_Max_Index
4 W/ e7 s/ R6 x% [- J& x1 Q5 W - BCC .Next_103 F' |* x/ y" x& \1 \- k# y
- LDA FC_Music_Max_Index- e8 ?/ g' [/ A w0 O @
- .Next_101 _. {3 H! W. A5 G
- STA FC_Music_Index- r9 A4 V* k# ?- A, U
- JSR Music_Init_Process' b7 t4 I5 A+ ^8 m4 L4 K0 B
- .End
# E/ K6 j0 i0 m) R9 o. `! X - RTS
4 H: v0 ^% _+ A( F" N& Z* e) |
5 i8 ^$ O3 s4 j1 t- ;----------------------------------------------------------------------5 P0 g( q. w4 S6 f8 G
- ;8位十六进制转3位十进制制* T, I( ^2 Y. g0 d( ?
- Hex8ToDec/ O0 l1 q" W# ]7 @' v2 a' Z
- STA FC_Dec_Data_1% R- i4 k n7 J: b, e
- LDA #$00
; {4 r% X$ `2 h* @4 i" C* U - STA FC_Dec_Data_100: W9 z6 h- l4 y# R0 f$ p5 F/ }( G* k
- STA FC_Dec_Data_10# g( U) G5 r- n9 h* r0 {
- LDA FC_Dec_Data_1' a! C6 ^# i' v
- .Convert_100% {. C3 ?1 B6 d; `# A
- CMP #1009 i0 W: P/ f$ f5 x( [8 t
- BCC .Convert_107 k& O) _9 }5 O4 o) `% t
- SEC$ C# c5 C! L4 X; F! v+ T
- SBC #100% a# f7 F' u6 z6 v' ~7 p
- INC FC_Dec_Data_100+ |, p E: @) |4 t$ A5 v1 P
- BNE .Convert_1004 V: ^/ L- ?$ ~
- .Convert_10( W' x, c; B4 h- j$ r$ v4 S p g% n7 f
- CMP #10
, ?" L' T0 E7 P7 W: k% ? - BCC .End
- n& L, f: C2 w - SEC
: L8 D5 ~3 J; T( h2 r - SBC #10% l$ D9 v: o# ?! R2 g6 O' ?% v
- INC FC_Dec_Data_10( W$ D& B% C; n/ V2 ^: g
- BNE .Convert_10( E# Z9 r# s' {! L9 E3 g* u
- .End% y9 h* E, [7 M) K" y7 N& s
- STA FC_Dec_Data_1. `, ?8 E0 ^7 k5 A u
- RTS
. k9 M4 L) `! P' x3 l
! z) c# l" N& r& u- J- u! K* r- ;----------------------------------------------------------------------4 ~; J1 J+ Q" d4 u. F+ ^8 @
- ;显示曲目信息
4 t- I. e9 C1 C* [ - Music_Info_Display- M, B' H: g! D l
- LDX FC_PPU_Buf_Count
/ A! S* V' B% O' g% a* [: O - LDA #PPU_WRITE_MODE_CNT_LINE
# ^# W7 k6 Z8 `$ P( F# H- U& ` - STA Use_PPU_Buffer,X! e4 R$ o9 c1 a$ `
- INX3 |3 q! |8 ^1 e
-
8 B: U2 ]* C: ^8 H# i - LDA #>MUSIC_INFO_POS; f0 A; q5 B0 `3 s- j2 k
- STA Use_PPU_Buffer,X% k- V1 D2 {2 _) }! g; @6 a/ E
- INX: `, M$ f8 j+ `$ V) x
-
% E% W6 L% `! q9 a+ h - ;居中
7 ^- {+ s# F3 p - LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2. q8 R- F8 Q8 T/ s
- STA Use_PPU_Buffer,X
6 w/ z& e1 O* B, _+ U - INX% {: Z; Z, ?0 r( Z! ]$ [ M4 Q
-
, \( ^7 P/ r% K' @) D: L$ u- J - LDA #$05
! S9 L7 s6 o4 \6 w, X+ ?; A% t3 U - STA Use_PPU_Buffer,X
8 c% v1 e) o: M: l8 e* g - INX
/ }- W# x8 T: I- E& R3 W' p -
7 I9 r0 N6 \) q5 w, |, n - LDA FC_Music_Index6 Z+ \; ^. `5 Q1 E) S, d, U
- CLC
" D+ p. Q: u# D - ADC #$01
- N v9 {+ v9 i9 } - JSR Hex8ToDec
S L- c* A: J2 K! B6 g; U+ g- V -
# d/ X7 p6 O$ \: h8 F" @) R - LDA FC_Dec_Data_10
# g9 X0 Y0 \& R+ X% G/ n - CLC- K5 t" v0 e5 S! M' A$ I5 ~! H
- ADC #'0', E; o; w" i4 {
- STA Use_PPU_Buffer,X
0 N" w# m$ l6 a9 S4 x, p, f - INX0 z4 y# {7 e# s% m, c( R
-
" S" `' X. g3 }9 ^ - LDA FC_Dec_Data_1
, Y$ c% r8 l5 C2 X6 I - CLC
1 ~& H6 G6 L+ g# W2 }9 e0 w9 E& S - ADC #'0'
: b4 q7 w) z' R) J- J2 W - STA Use_PPU_Buffer,X% Z( [; P, F" ?8 R0 X
- INX
8 I/ h$ `0 n& ]. a - 0 Z: E9 o4 {6 |+ v. P- A
- LDA #'/'8 I; i& _+ |3 ]
- STA Use_PPU_Buffer,X: K4 ^+ q1 w' A( U: M- d& m
- INX
# {# ?* c; q; U2 r - + a6 N# ]- o5 n C1 J" o
- LDA FC_Music_Max_Index
$ Q$ Y1 h! m1 ?- E2 i6 C* k - CLC! l# U, ^$ O# d7 L* @' B
- ADC #$01
6 E( T( {8 g# \1 v8 O3 `9 `# P - JSR Hex8ToDec
9 B' |2 f d. m) j. [" c - l( u* l0 P2 A1 A1 x G
- LDA FC_Dec_Data_10
; I3 F4 U% b3 `/ Y% v0 X; Y/ n( |4 x - CLC# d' ?& G- v" I. D- ^
- ADC #'0': j% z2 I H) B8 C1 T" F
- STA Use_PPU_Buffer,X
& x" A" @; x) Z$ K. i - INX
- } y9 Y) F0 O -
2 h3 @5 n& R2 h - LDA FC_Dec_Data_1+ F7 T) t; E8 T0 A
- CLC* d9 _+ B9 S0 b+ i5 @; U M
- ADC #'0'/ i0 X6 i8 d) T2 o5 e7 w
- STA Use_PPU_Buffer,X0 t2 ^+ `" t% o) [2 C o
- INX% }: O7 W1 Q* R( X. y9 u4 T
-
" N, d" R; f) l9 I) j( J - .End+ H5 K D( K" ~( t; Z7 ?
- STX FC_PPU_Buf_Count
% P( |) M) p: q O9 R3 F - RTS
& P# B, l4 @3 X' ~
0 \, s1 X& |2 E9 ~- I- ;----------------------------------------------------------------------
8 j J# P9 ]/ W. V5 b7 g! @" k - ;音乐曲目初始化处理
4 i1 I/ n4 u4 v" b5 q2 q9 V0 l - Music_Init_Process
^, ~& l! Q0 D* _; z - PHA) D' ~9 V" r* a! T! y' P7 W
- JSR Music_Clear_Process
& b( K; `, H, ]7 ` - LDA #$1F
# L7 b& q- U1 X4 |( T$ [' V# n - STA $4015 o" G/ l' y( G7 p
- PLA
: [1 W' L1 ~& T( S D; U - JSR Music_Init_Addr
+ j$ r9 n6 a; J* D0 L - JSR Music_Info_Display6 ~! @& R: L9 \$ a
- RTS
9 O1 b, }& L) I: o$ e6 [/ z8 m - 6 b5 Q/ K8 i, @: e* h3 h
- ;----------------------------------------------------------------------9 g: ^8 E7 x& y6 W. h. z
- ;音乐播放处理
9 ~" M) o1 d* J# X& X/ m8 `: H4 [ - Music_Play_Process% w/ ?4 |2 s) e/ |
- JSR Music_Play_Addr, A& O) F; s' Y9 s; _
- RTS( _& y( K2 K" W4 x
8 H. k- N+ p: Y- t- ;----------------------------------------------------------------------" U, j" m! z# g! J
- ;音乐播放处理
+ q1 d" _0 s* L, F- ?, O - Music_Clear_Process; r2 h- x% _% Q5 V3 [* O, S
- .IF Music_Clear_Addr
3 F7 K2 C/ n7 G - JSR Music_Clear_Addr
( {0 O# c$ r9 ?( { - RTS
7 J# `9 p5 P x7 y - .ELSE, Z1 W% Y. A+ {3 ]' s9 J1 u/ c
- LDA #$1F, X3 T% U. |. [* r0 V: @% K
- STA $4015# d; q3 ^, o- c" _
- LDA #$00
* p' A: @6 |7 V% e* T. E - STA $4010
, w5 v# D k# f8 X: _4 F - LDX #$00
) K9 E- i( X" r/ {! L' N: D+ R - LDA #$00
8 q, j, v% B4 a/ I4 `6 T0 v% Q - $ \; e2 o* Y. T$ V) c) t T
- .Music_Clear_Zreo_Page_0
9 h# h! X7 X) Y% |5 w9 F7 {# `- \ - STA $00,X
: ? G! J% H d$ c3 k- l9 x3 @ - INX0 V" L. ]& g$ b# N
- CPX #Use_Zero_Page_Begin
+ N( k& N. o0 p8 B1 m- @0 x - BCC .Music_Clear_Zreo_Page_0
: W. R! i! C' U8 f -
7 E3 w* B& u. A& x: m# Z* H! ? - LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size! J$ z0 `7 ^& m+ }7 G- f
- .Music_Clear_Zreo_Page_1
3 Z' u7 F6 g- u8 @7 D - STA $00,X9 D. U7 j. b. U; O0 a
- INX
1 o6 l' ~: ]3 }8 ?: N' b7 a - BNE .Music_Clear_Zreo_Page_18 p) ?2 Y+ {. V
-
0 U' H% z5 b& m5 Y5 W - Music_Clear_Process_1
, y0 s; L8 g C& I3 n+ R. U - STA $0600,X' O ^( S9 b& {" K0 I7 W4 g
- STA $0700,X- f+ p+ X, m2 `- B7 A
- INX
! `" L. Y. [: ]5 x6 h6 K) t/ z/ f0 _ - BNE Music_Clear_Process_1. j6 {6 S3 A3 T6 {- g: ?$ q
- LDA #$10' J9 d: i1 R1 h9 z. f5 _
- STA $4000
' Y% x' o% X% U& R# }( h; G; c3 x+ ^ - STA $40045 g3 S: s5 F$ L5 m: X3 S2 P
- STA $400C
% V* s' Q b% X; {- o( n: J - LDA #$00
0 e5 Y7 r- c: G" J. z1 {0 F( @ - STA $4008
7 A& v y) ~- n1 n0 k, [ - LDA #$0F
* t4 x$ S; A4 @4 L# Y- n8 q - STA $4015% x9 U8 A3 V( d; Z/ m
- .ENDIF, S% `' e7 C+ \/ o) j
- - z8 |, c. {; ~+ @; ]# e
- RTS0 G& h4 I5 J9 u- O3 A6 {6 h
- * S* v" l3 E: o; K/ t2 h
- ;======================================================================
~% _) m9 o% B4 f - ;重启处理
2 n$ R- s+ | a9 ]+ B - Reset_Program
' S: k- l3 W1 P; J% A6 m - SEI0 s0 I' |% g6 |
- CLD7 P* {9 j3 b) R, t% l
- LDA #$00
9 I, `1 ?: L( D1 r. a - STA PPU_CTRL. V4 X, g0 C/ u6 E. L# j, p# M
- STA PPU_MASK
. v" Y5 Y6 I/ T5 \9 Z - STA JOY2_FRAME
. b, ^* g" u8 x- D1 M% ^) W3 u - STA APU_STATUS4 k' A" j* N2 y; ^ A& D* x0 {: k9 `
- ! s4 p8 w6 v q% l0 _
- ;等待屏幕准备完毕
: {- u0 k, `+ z8 u - LDX #$02
# i! V5 C+ N, r' G! O - .Wait_For_Screen_Ready S* U/ M9 S# W
- LDA PPU_STATUS
2 {/ u( s X! p" J# O% p* b - BPL .Wait_For_Screen_Ready5 P' E9 q4 U# @) k: {. @, a
- DEX5 t3 H$ F( ^% o2 k% W" @
- BNE .Wait_For_Screen_Ready
/ Z" }! z3 o1 \ -
& V. ~- X4 n5 c i4 k# B7 T. ~ - ;清空调色板4 ?8 O3 D# `) ~0 \! q" c% C
- Palette_Clear2 i+ \- g7 T+ i, E. }+ @, C
- LDA #$3F7 X- S- k' D) R: f. {7 P; D
- STA PPU_ADDRESS8 h% e, g. K& a9 i
- LDA #$00- m7 C/ W0 l% C# C- r+ g
- STA PPU_ADDRESS
; X; n/ |1 s3 e% z, c7 a9 s9 ] - LDX #$20
3 t; \" P; W, C$ A" j - LDA #$0F: J% J3 ?' }9 e6 r4 i2 Y2 m
- .Write_Data* D; [% ~5 t! F" w, [! z! \
- STA PPU_DATA
0 _4 M2 I6 h- r9 e. p8 b& } - DEX
( ]' d, b8 W* Z% v9 H8 O) b - BNE .Write_Data
" m" q, h, r( {! i" h; A5 X: C
& u# x9 {& ^: g6 N1 }- ;清除声音 $4000-40139 |& ?% p$ x/ B6 W- t1 B
- LDY #$14
: y: R% o E2 S+ p# K - LDX #$00* w; j& |4 A" p7 J
- .Sound_Clear
4 \3 s) J1 X* Z4 @' n, N# R - STA $4000,X
# `5 y: t5 a* V9 `1 q6 G, ]8 H - INX
2 f- T1 w9 j9 |5 L# n - DEY; _- j( `6 }' j1 C% `; ?: ]/ }8 a# R% [7 @: p
- BNE .Sound_Clear8 G1 J# I/ e( @! _
- 0 S) {/ u, \/ B+ f7 e5 i
- ;清除 RAM $0000-07FF
/ u, I' e8 w3 n% ? - LDA #$00
0 s* r( m$ A; t! R2 B5 _; H3 A - STA $005 H$ ]8 J4 e, e, O2 H m
- STA $01
1 w! A5 e' V& ^3 z- W' K - TAY
3 {* o. N$ G) f1 ~8 u3 \ - LDX #$08
+ A- ~# o- T" y: K - .Memory_Clear2 r1 C8 f6 X% c' q P7 \
- STA [$00],Y
. s% X! i( v. }$ r - INY
R, x" c% k/ I! b( \' I - BNE .Memory_Clear
7 |% J5 _( M2 O: y; l4 x; L - INC $01
% r/ S7 A h. L, h3 ?. x/ m - DEX
* {9 E" C8 P3 d/ b6 u - BNE .Memory_Clear' ^; Q2 Q7 K ?
- $ P8 m* k% [, T
- ;精灵缓冲初始化5 X1 E, [5 I9 J0 }0 b
- LDX #$00
Q! ], T2 Z/ r2 w% y b - LDA #$F8! _& t# _4 {, c; c6 @8 _! Z& J7 F
- .OAM_Clear
" X5 a, C9 ?* t! L1 B5 E. p - STA OAM_DMA_Buffer,X
H( U9 b1 Y% ~; J/ g' n - INX
. k# a; d# k0 C$ ?9 {3 [2 N - BNE .OAM_Clear
2 ~3 N) t+ ^% F5 L6 m& g - 9 I& f% I5 e$ e, e2 X7 C. T$ r; ]
- ;栈指针初始化5 T3 B, f p& F
- LDX #$FF
5 q# u1 g. K, E0 J$ a - TXS
, w8 A0 j$ l B/ N1 U3 A. H+ \# { - 8 w; Q" c1 @3 Q4 n( E6 m# p% |
- JSR Nametable_Clear;命名表清空; m- l2 c' t& f
- JSR Palette_Init;初始化调色板缓冲
. L! _8 i6 t& L. C) B4 @+ G4 { - JSR Static_Text_Init;初始化静态文本
. C" h2 K7 n: |- @" G8 n- ~9 m - % a$ T$ ?8 k) Z( R E
- LDA #MUSIC_ITEM_TOTAL - 1$ r3 ^/ q3 ]; ]* c/ X
- STA FC_Music_Max_Index
5 ]0 p5 j1 k* p0 Q# J- f! B - 8 M. T4 J, d5 r
- LDA #$1F; r8 {% z" z* a; N
- STA APU_STATUS
; v( l7 o6 D: z- G - LDA #MUSIC_BGM - 1
* ~' D" W# U8 j8 o+ ? - STA FC_Music_Index
: j5 a6 c; l* H3 \* b" S - JSR Music_Init_Process;音乐播放
3 C4 b* Y: J, q9 b -
- N+ D. j/ m: { - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)% D, L2 y: H/ x+ |! o
- LDA #$1E9 U2 ]( U$ D4 M$ P/ F) |
- STA FC_PPU_Mask_Buf' m: Q- `! t0 } m. U
- # f" u8 _9 \1 o; C2 ?
- ;启用NMI处理
7 G; v2 M+ e; M/ n! N - LDA #$80
) I9 I, z- F1 n) m7 z8 D - STA PPU_CTRL
" K7 P: X% V q5 m- t0 m -
: v& e2 m3 O: _3 e - ;程序循环, 剩余工作交给 NMI 中断处理
' q% x: c2 E7 w/ K I4 X - .Loop" w1 ^( s) U+ L8 P
- JMP .Loop
/ g2 b6 t" S4 c9 C9 f8 x( N - 1 E" q/ G" g1 T) p/ t
- ;======================================================================
0 m6 W2 g T( Q- h4 _* a" u0 X! o - ;不可屏蔽中断处理
( m' X) i* ~" X& {0 ^0 `, ^8 k; p% V - Nmi_Program% \+ [3 e9 Z d( _, }/ |
- PHA* a3 M0 n+ Q7 u7 ?' |
- TXA
1 J- B! X' h( J) a9 A& Y$ Z - PHA
8 h' `0 @( E( g6 y! z - TYA$ B4 J/ N1 t) o# I2 Q1 s" ^
- PHA3 d6 r+ Y+ K6 Y- |* f. g$ q" m% j
-
8 d6 R" X1 c# f - LDA PPU_STATUS;读取使得 PPU状态寄存器复位! O% {. S1 _/ k3 ] T4 i% D2 j
- % R% H5 ~) X5 |# K7 L* E/ i
- JSR FC_PPU_Procrss;PPU处理6 Y8 S6 j4 \5 Q1 k$ a% ~' R
- * s5 l0 J, c9 `( X; B* k
- ;精灵内存更新3 s/ d# C8 w+ Z* c1 ]- T: ]0 H I3 H) j
- LDA #$00# P6 p# v$ l1 u$ ], n+ z
- STA PPU_OAM_ADDR' P4 o. q/ x/ r
- LDA #OAM_DMA_Buffer / $0100# D( X b' b4 P) E1 z* P/ e
- STA OAM_DMA H; B* f6 x; b) W Q' d" ~
- 6 x* V6 T) H1 }2 V- I
- JSR FC_Gamepad_Process;手柄输入处理
. ?, ~9 T' J) l3 n4 Q" N& C - JSR Music_Select_Process;音乐选曲处理7 B! d8 W( Q6 D) F$ W
- JSR Music_Play_Process;音乐播放处理% p! R: G' f# q1 `) _, _
-
' D" u3 S; x$ ] \2 |9 C. h- P - PLA
8 P! w# Q' X/ K+ q5 b - TAY
# n' j" |/ p I1 ~6 `6 [! q1 L - PLA* k' I' E) N$ p' H
- TAX
. _5 u% H$ O, T1 r. @ - PLA
3 G! f8 J% h% J0 f
% w8 T6 F/ s' S9 H- RTI
) D/ W+ @8 Z) Q, @6 n! F' g - + u) Q% Q8 Q" Z" G9 {7 L" Q
- ;======================================================================
; s4 l$ c0 L6 T A, h - ;请求中断处理3 W: O7 Z' |& q X4 S- J. J
- Irq_Program% L' T @: g4 Y& f
- RTI5 n) h) j, R/ x- B- Z6 s
3 v$ y7 q) C/ Y5 A4 J4 x- ;======================================================================
2 G8 h( ?" G3 |8 R - ;中断向量表6 c9 @9 f# X' c2 F
- .ORG $FFFA
! i. J& A% C/ l4 z0 r - .DW Nmi_Program ;NMI触发时执行
' I0 V7 N$ k- c - .DW Reset_Program ;载入ROM时最先执行
6 M" H7 Y9 p* H* `5 k, \& N - .DW Irq_Program ;IRQ触发时执行
* N' n3 A8 i# w4 k+ Q
复制代码 ( M+ F! A( b1 b- @
- }7 u6 `- L$ v
3 R Y9 I0 o4 M5 E; P/ J' ~
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