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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下
: s7 P7 i1 c a0 ~5 O1 X6 [- o% Y
/ u! D" C- |$ R! {6 J以下是主框架代码:. [9 ] D: {0 v! {: P' s- t% Z
- ;======================================================================
- F2 e3 M, h. l7 W2 u - ;文件头
a* S" y$ s2 v) { - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量$ r: j m/ P# ]# @6 c% q
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量
6 {( m5 E$ n8 S6 L: H: e! @ - BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码+ r8 G; n4 N4 D3 A& H4 E7 J- ~
- ;======================================================================
8 j8 X4 W, N$ r- D7 c9 G' c+ I) H - PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2/ u$ t* i- P4 I" P, g1 p
- PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1$ l9 g& g; Q, m+ _: H
- ;======================================================================6 A) V5 X; Y6 |' ?5 W
- RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
/ p2 ~2 D O/ X - RESET_ADDR = $E000 ;主程序起始地址
+ N- ^2 M3 w5 Q7 Q3 q# N, _ - ;======================================================================
5 j! X" b! G: Y9 V - .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB$ x3 R! v9 z* T3 G, U5 u; t" w; H
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB
) a: v( W. z( R& k - .INESMAP 4 ;Mapper号 (0-4095)( H! l8 x, D( a
- .INESSUBMAP 0 ;子Mapper号 (0-15): O7 i8 g9 W- |) _
- .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)* ^$ r$ ^7 o1 a" o
- .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)' n8 ?' s6 U: J6 ]3 K0 V
- .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)
, K4 Q2 Q+ S' V$ { - .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)8 _, w3 x6 L3 ?$ S
- .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)
- o r8 L: p3 a m - .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)
3 `2 C1 r! c' ^; s8 ^) t) n, q - .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)1 b3 h6 U6 t- e- M
- ;======================================================================
0 G( d5 g b" Y! w4 E! n, t - .INCLUDE "fc_demo_config.asm" ;全局配置
( u+ W1 n" W7 `/ Y" D: ]# _: I - .INCLUDE "fc_demo_constant.asm" ;NES常量
! z7 i9 _8 v+ w ~+ L; c0 A4 H - ;======================================================================$ q. S8 e5 G! }3 I, g0 v' r! C
- ;音乐配置
- G: ?" J, \2 `7 C* I0 y% Q - .IF 0 = MUSIC_THEME / M u/ n3 |' y& }$ b% v- e# W
- .INCLUDE "data/music/Gremlin 2/config.asm"
5 x( S, g$ k" Y. s: ?. H% F - .ENDIF$ q/ P- X9 q. g8 @4 i5 N; s# m
- . G/ U9 s2 k8 y* P5 y+ \# T7 D
- .IF 1 = MUSIC_THEME
: {, v. t0 t' s, r" t9 O* _ - .INCLUDE "data/music/Raf World/config.asm"' d7 }, [+ a; M5 ?6 |
- .ENDIF( j5 F. f i0 H
- 4 h1 d. O8 ]9 G' ~7 O+ Y' R/ D
- .IF 2 = MUSIC_THEME
4 T# v. }" B/ \3 j4 p9 P6 Z - .INCLUDE "data/music/Ninja Gaiden 3/config.asm"# B7 H7 B& l1 r, o0 J! U0 v
- .ENDIF
+ u/ ]' R9 T* x- u% b- u5 t$ z' V
! W% W! f8 L* h- ;======================================================================2 V ]1 j7 d6 w% z
- ;引用CHR图像数据+ G% h: x( y# c1 U0 R' q% j+ A
- .BANK NES_16KB_PRG_SIZE * 2
" C5 P/ L M: N h- O - .ORG $0000
1 S/ G4 U0 k! s. m# Q - .INCBIN "data/bkg.chr"
3 [/ h$ F2 V7 F# E" d# e9 @ - .INCBIN "data/sp.chr". Z7 U4 B% u2 z9 P- D* f
-
! R% q! ^9 v+ f. r3 B6 U4 K - ;======================================================================
1 J( w: T/ w- z - .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank
+ D9 y# k6 @) W" t - .ORG RESET_ADDR
, b# L6 s! H. r' ~5 w1 W" P7 V - ;======================================================================
+ v9 z/ @7 {9 w9 C1 {5 a' j2 C - ;引用其他源文件
- a, \: |0 |$ A% f2 ~* ] - .INCLUDE "fc_demo_ppu.asm" ;PPU处理& d* S0 Q2 \4 |# U$ v) k
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理
; m- b/ |% U5 r1 U - .INCLUDE "fc_demo_static_text.asm" ;静态文本处理/ }' L3 o% d& f8 j. Y8 f( W
- ;======================================================================
& r6 e- t7 j' h0 {/ \( t, D
% Z6 w9 \$ [# X; a- Q. `8 c) W% h" T- ;======================================================================3 I1 u* P$ J5 N: D5 I
- ;等待VBlank到来3 A' E" e+ P4 W' ?8 K
- Wait_For_VBlank
+ _9 m9 W7 q" {/ F' f( D - LDA PPU_STATUS
4 l$ h t( q9 A C D) J+ d - BPL Wait_For_VBlank& E P. o" ~5 y
- RTS
: e+ a& N7 j \: a, r% }: s" ?5 j
. J4 ?$ i$ H1 N- z- ;======================================================================
, _" l0 J$ V( E7 M* f0 R7 \% p) R0 C - ;调色板初始化
4 j5 {9 D# a D$ h/ K/ G+ m! b - Palette_Init, h; s" ^, Q" n% Q3 A
- LDA #$3F
- s9 Z* a9 S, S - STA PPU_ADDRESS! I+ r& X; K7 S. I" j* a3 a' z
- LDA #$00
& m9 Z0 A) ]0 G: E* C& s, C - STA PPU_ADDRESS
6 E/ X# j+ {. i2 i+ l - LDX #$00
+ S' x6 S" j1 h0 f1 M5 ^ - LDY #$20
2 |# A( V z, B, g! w - .Write_Data
# @6 F2 |/ d& X! Z2 g' h0 } - LDA Palette_Data,X
- _( {2 s/ U8 q6 L* G2 j) l4 B - STA FC_PPU_Pal_Addr,X. G* a5 J0 _- r2 ^) F7 r
- INX* u- e2 Z6 l7 k
- DEY
" x) r- U$ H" J - BNE .Write_Data
- u: M1 G& a% K: W" |/ f# }" H - .End3 l: w/ y5 Z) w6 k% |6 H. {2 J, H# O
- RTS# ?1 O# K6 f1 Q" L3 }
3 O- B6 e" `# i$ U; C- ;----------------------------------------
* B8 g0 ~* T0 J' w - ;调色板数据
) D, B f! t7 v& b9 b3 n - Palette_Data
L' H( g! \- _, r: n4 W - .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B! O" B5 V4 @2 H9 s2 n p
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22
" @4 K- u( y, j5 J' q1 U -
7 B! m& w; f; j& _ - ;======================================================================
8 c p; I$ E+ j( k' D - ;命名表清空+ V0 i- l0 A% {6 b6 ]
- Nametable_Clear- C$ d! z- j) C
- LDA #$203 Z$ v, S% P0 G: F1 W3 e% r
- STA PPU_ADDRESS, y& m0 J8 ~& T1 O/ u& X9 i9 f1 {5 U
- LDA #$00' t8 m6 p: I% O3 u8 @+ p+ U
- STA PPU_ADDRESS. H& s: ]2 B: _3 s# Y. J
- LDA #$00
+ A% U; }0 ^0 H! B - LDX #$00
c0 C* p8 ^. K" G% g - LDY #$08 X; U8 U6 R6 J/ r+ x9 d3 B; p
- .Write_Data2 B, \7 r |4 O" G3 s! e0 T4 k
- STA PPU_DATA' d& R- w6 }7 F
- INX3 e5 |4 p; M. a/ D% v
- BNE .Write_Data* ~2 |+ c. o+ l1 c; f& O
- DEY) S. J; o0 W b( W" S
- BNE .Write_Data
8 \+ b9 g* U5 J& l - .End
% h. F. X8 Q6 Z. W4 T. b; l! V. R: p - RTS( U8 a& e: @. f( _
5 Y/ }' b# C) z: s; K- ;======================================================================
) r7 K+ |) D% \# o# T - ;音乐曲目切换6 k3 l, i* ~: l. T$ H x7 t6 K
- Music_Select_Process% s- a5 ?% O( @- {; w5 B, w# f0 d
/ Z6 y7 Y: c2 L% _) P7 J- .Pre_Music;上一曲& s& u" h8 T# ^5 _( D
- LDA FC_Gamepad_Once
^( H$ t0 m; X! @ - CMP #JOY_KEY_LEFT
) S; @& A) I3 }0 K I: h - BNE .Next_Music
4 h* t- P& C2 _0 t - JSR Music_Play_Pre6 }$ N5 @# S/ \# V% Q/ Q2 A
- .Next_Music;下一曲
- j ?: o8 {8 H& G# h" ^3 e! G - LDA FC_Gamepad_Once- Y6 z* c9 ~2 [0 ~7 r
- CMP #JOY_KEY_RIGHT. e7 u- E' {, ] N0 O0 }8 b
- BNE .Next_10_Music! V* e9 Q+ U( n( e
- JSR Music_Play_Next4 m8 r' F a7 e3 v# x8 m8 u
- .Next_10_Music;上10曲: c0 c2 N( t6 |. ^
- LDA FC_Gamepad_Once
: V5 m- ^5 k7 w- v/ u9 o - CMP #JOY_KEY_UP
2 W6 l- I, |( I1 H, B - BNE .Pre_10_Music
/ x- \" a0 [2 E2 a' A# \ - JSR Music_Play_Next_10; { K8 u* P5 |* W/ H# k5 i! G
- .Pre_10_Music;下10曲
9 A9 [4 q# j, Z: W, a$ R1 g - LDA FC_Gamepad_Once" P$ Z9 y* g7 S! |
- CMP #JOY_KEY_DOWN
* J2 C* m ]' k( v: d. r - BNE .Reset, y8 H* [3 `0 ?7 h2 _! j
- JSR Music_Play_Pre_10
# X& F) }& c5 K+ |. \) \ - .Reset;重播当前曲目
7 f3 f1 D# k# r1 U" H. w; c - LDA FC_Gamepad_Once
" ^ A/ z$ C5 @2 n4 _ - CMP #JOY_KEY_START1 x% C6 x6 `5 _4 E5 q7 s( c
- BNE .End
( M- ?. v2 i9 w. \ o - LDA FC_Music_Index- s% m' t3 M2 n w0 ?' \
- JSR Music_Init_Process
# A8 B' F9 r9 V$ T# @ - .End
% j3 ` n$ q# u& v& F - RTS
1 s4 d' o7 ~2 w V2 a
' R% P& q0 `* Y3 d- ;----------------------------------------------------------------------
- N, {( h6 ~5 K& f - ;播放上一曲8 q1 f& F! n5 M A
- Music_Play_Pre
& L. [" L, U( o3 I* v; v4 | - LDA FC_Music_Index
9 h' d1 r( h& _ - BEQ .End5 Z, N$ x5 m! ?' @
- DEC FC_Music_Index
0 |# Q- y& u2 h5 `. ^* A - LDA FC_Music_Index
; u* G& @8 ?8 \4 D" L5 z) C - JSR Music_Init_Process
8 p& t1 ]; A. K2 _ - .End* e' v( @% w: ?1 b: A
- RTS
/ H: H. E8 N r# y! r* y% i - ;----------------------------------------------------------------------
' g! z' W# h% F/ ~5 J i8 Z7 R- R - ;播放下一曲
( Q9 `# q7 ]+ A; z& E0 M - Music_Play_Next8 X- b. J3 M7 B
- LDA FC_Music_Index% b, t/ I$ h! @/ T, n
- CMP FC_Music_Max_Index
/ `6 W" L+ `4 ?! |: M1 O: I, ] - BCS .End
5 V7 e* ^& g7 O, o. m' Z - INC FC_Music_Index2 j. E2 ]6 @! B# K! p% Y% y
- LDA FC_Music_Index3 b5 A4 P! X* P9 ~
- JSR Music_Init_Process
4 ~- i6 D h( J" v4 r3 i9 L& G - .End
& B8 B$ ^# Q, S* \ - RTS3 y* d O W6 K! y
- 1 o% e1 p# V; P8 ~5 F9 ^
- ;----------------------------------------------------------------------
3 d: g9 R( H$ ?. T0 ^/ M, x - ;播放上10曲, ?; o9 s: I$ X6 k* v5 q
- Music_Play_Pre_10
2 q" ^/ T8 J/ p: m) w - LDA FC_Music_Index
- k; n2 `" ?1 ^ - BEQ .End& V2 v8 ~8 t% u0 N3 K0 v5 J
- SEC) n' E- l5 L1 m$ c) w1 _2 w) ` f
- SBC #10
+ A8 b' X1 n+ f! H n% T" ~8 K - BCS .Pre_10
1 E* U+ s* E% A8 T* U& ` - LDA #$00) J* q$ J% z/ h
- .Pre_10
1 K% q! ?" Q( G @! `( j* {) r - STA FC_Music_Index
' t" ? K4 X8 m. Y Z* d. Y3 A - JSR Music_Init_Process
- M) ]$ E U: @ - .End: K) `+ `# N3 A6 E
- RTS- X9 V/ m% ?8 C' |
- ;----------------------------------------------------------------------
" `% y4 R* S$ P" ^+ u. h' \ - ;播放下10曲# G d4 A9 V+ L9 Z! D [5 f! g
- Music_Play_Next_10$ X' w& @$ _( m# }. R
- LDA FC_Music_Index
/ y( w. E# R: ]# ~ - CMP FC_Music_Max_Index+ [7 b5 J. `; j6 H) v" V
- BCS .End
3 K8 B8 }* u9 @& K8 ^ - CLC( N% Y' }4 C8 k p/ H$ Q0 s; m
- ADC #10) r3 }- I# w f$ ?! b- N
- CMP FC_Music_Max_Index
. \) I' ?1 P' w8 z3 k - BCC .Next_10( h1 e1 b+ b" ?# J6 m2 P
- LDA FC_Music_Max_Index7 \* O1 N! w- J0 h, [" `" I2 z8 N
- .Next_10
9 ~$ O3 E9 P) `- u( G3 O* T d - STA FC_Music_Index
v9 F* r. n6 C1 e - JSR Music_Init_Process
- q5 ?2 F, R8 h2 G0 ^( ` - .End
( h0 \$ Q( N5 ]# e - RTS
+ H& z6 ]: C& O" ]. W - 4 T8 }4 ]5 `3 ?6 \9 C! T
- ;----------------------------------------------------------------------
$ O. j1 o* |9 ]) F3 o+ {0 T3 @ - ;8位十六进制转3位十进制制
6 u4 }- C7 K- V. k0 J0 P - Hex8ToDec
# z) K8 s5 q2 X; k8 S6 n - STA FC_Dec_Data_1
1 B" O2 H1 d0 O, l! `! \8 j - LDA #$00
0 j' o7 i. c5 [ - STA FC_Dec_Data_100$ @, b% E% a3 K" t- ~
- STA FC_Dec_Data_10( O: w# }- U, \& O: k; M6 R
- LDA FC_Dec_Data_1. B7 K1 z4 a F% m
- .Convert_1005 @: k4 v4 P( ?5 [
- CMP #100& g% j- p" o4 Z9 d0 Z
- BCC .Convert_10& h m+ [; X; K; P; e+ ^* i/ u" G
- SEC/ ?$ V# ~' N( U, x8 ` u
- SBC #1000 T; G5 J, K0 z9 j7 p
- INC FC_Dec_Data_100
$ b% D% v, W5 T6 s" K' ` - BNE .Convert_100! z3 k% `* _; A3 a: E$ @
- .Convert_108 D+ O( a8 x9 F4 P, w/ h* C; I
- CMP #10
y9 ~1 J) h3 e% H3 d - BCC .End
" ^4 ^8 B5 {) j& }; O - SEC5 I6 Z" V" P1 ?6 p' S- L
- SBC #10" w) _0 p+ R2 _' D9 l4 h) |/ t( y
- INC FC_Dec_Data_10$ C8 V0 {- z' `/ F% }4 U& u0 }
- BNE .Convert_10
& [! b3 O* A! A' u" X5 V, G - .End2 K( d# y, p' {8 @/ O
- STA FC_Dec_Data_1
7 |, P9 c) _3 o) s. i9 m - RTS
0 D) u4 e0 W* x. s! N/ C
2 T1 @& l3 `; x v! p- A3 O' r/ v- ;----------------------------------------------------------------------' A( u9 n& s# c& F1 a" H0 p
- ;显示曲目信息
/ ^- u- K+ J4 A X - Music_Info_Display: g9 t6 G: H _7 q
- LDX FC_PPU_Buf_Count
; V, w. @, h2 v; z* |! _3 ] - LDA #PPU_WRITE_MODE_CNT_LINE+ ?/ ]$ b" g8 k, M3 t
- STA Use_PPU_Buffer,X: D: G' q. w7 ^$ k+ ~/ \
- INX
1 c. j3 J! m# U8 K -
i3 B, j. r, ~, x& K8 k8 a - LDA #>MUSIC_INFO_POS2 o* z5 ]5 x' O6 B; e" t' i8 [
- STA Use_PPU_Buffer,X% p% T2 f" m# F: _
- INX# o5 C! s {* N, W: e6 U
- " o+ c7 q* a$ @( T. c: B
- ;居中
8 [ s+ B+ D9 m; g# r - LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
?4 S- [: a0 E( N8 F- ~! ? - STA Use_PPU_Buffer,X
# d9 u( x3 D& o3 L1 p" T9 }3 V - INX) D! u* P0 [# {$ \
- 1 m* I, c' N( n8 G- P9 m6 d* a% T2 V
- LDA #$05
3 m$ g8 a. W1 Y; [1 c3 { - STA Use_PPU_Buffer,X
; }& x/ O! P8 H5 o; y3 E$ A5 l - INX
6 i* F3 C% n i" m# q' s; O1 V - , [! @1 n9 ?) ?/ ~
- LDA FC_Music_Index- h2 F4 }" } z0 u! i8 O- t$ x6 A
- CLC$ V* ?3 F! p7 R$ m
- ADC #$01
8 J! M. r1 a* D; v - JSR Hex8ToDec
" U3 F% T+ r, R* Z' N - : J. g! y; ~8 R) ~: E8 D' m1 q5 {
- LDA FC_Dec_Data_10
1 m4 `/ L8 V& i2 S$ Q' e: c$ C - CLC: Q5 i( A) z% I( B. `: M& ?/ b
- ADC #'0' \, ]$ y3 B; {9 Q. P1 [
- STA Use_PPU_Buffer,X
, @# E) m1 q$ w7 C0 ^5 E - INX
8 S9 v7 ~: M1 t' {) ^ -
( F) P% ]: E% S6 S; x; ^ - LDA FC_Dec_Data_11 O/ l* y; g. w
- CLC( i4 X+ A p- m' t
- ADC #'0'9 {% R- a3 A4 a" k# u. w
- STA Use_PPU_Buffer,X; a; ?$ x: Q% Y$ D7 _" t
- INX2 ?; j" s$ _$ ~& h7 h# _
-
+ C7 H7 I) ?% y4 J8 w - LDA #'/'
3 O# n3 ~3 X) Z+ ^3 ~* w& |0 a - STA Use_PPU_Buffer,X
* K- E7 f& D3 q: S1 o9 R - INX! ]' y. A8 M7 Z
-
0 {& z) w9 W: z4 K( G - LDA FC_Music_Max_Index
6 i! ?! x/ _1 a" u0 {$ i - CLC
) c$ ?+ x2 Y- L* w+ l' N. ]! X! U - ADC #$01
( `' b' A# b0 X, ~8 }- D - JSR Hex8ToDec4 w* w: K p% X' Y# U/ {& @
-
. w0 x L: m5 F! ^/ l# [# E3 m - LDA FC_Dec_Data_10
3 H% c" E4 N/ v& g! C5 S8 f - CLC
2 r) l) P7 ~% V. R* @: l - ADC #'0'
$ A# n T! v8 l/ w* N - STA Use_PPU_Buffer,X
N3 ?' f. p: t - INX2 t9 O: @* ^5 W. J5 ?3 I
-
' j* k: p& D3 y% o% M; H. F4 g6 H - LDA FC_Dec_Data_14 P" j( h6 {5 D, B/ }/ r
- CLC
: {* a$ \; Q7 C3 `- z, L5 p - ADC #'0'
) O @" B+ P5 ]+ Q$ k+ U - STA Use_PPU_Buffer,X
4 ^6 r! T) @+ B3 }& V - INX/ j+ W D; K9 B
-
G# A; S. Y, F - .End L/ V& M. D' g" t
- STX FC_PPU_Buf_Count
% A' O7 K: x* w* R& @ - RTS
2 e) y% x8 w& _+ H4 A
9 a& i6 [' \) I$ W0 S- ;----------------------------------------------------------------------
/ s: {+ s2 G( y - ;音乐曲目初始化处理& a! } F8 b2 S. e2 l0 W" ]7 C
- Music_Init_Process
2 j1 N" A7 D; G. V5 w - PHA5 ?+ I2 }# S' x
- JSR Music_Clear_Process
1 B5 B) T" r# s7 G - LDA #$1F
: N; F- y# Q8 @0 l- ?$ K - STA $4015
8 K( \" E% C0 e1 S j - PLA
$ s0 b" B4 \: |$ z/ Q - JSR Music_Init_Addr
7 [6 Y9 j9 T. }- ^+ I5 n) n - JSR Music_Info_Display3 u1 B8 U3 D r% _/ d' {6 E
- RTS( j* r8 D: ]6 q
, \& c4 R/ j) I" w# T+ G. L, B, G# G- ;----------------------------------------------------------------------
3 t, A7 `# Z8 A - ;音乐播放处理
" v. u. ~9 p& u; ~) ~, c - Music_Play_Process
& `! Z! ]1 s( h5 m* `- [ - JSR Music_Play_Addr: Q# r6 Z. i, C
- RTS3 @% P R, \# s4 x% }$ c$ O/ R! ]
9 Y+ `+ W; S' P. n- ;----------------------------------------------------------------------( k' d( T7 H. E5 s7 e3 v7 m- N
- ;音乐播放处理8 |4 Q6 R; W p: ?
- Music_Clear_Process( g; x$ @& ~: v1 E* Z/ y1 n
- .IF Music_Clear_Addr6 Q" J3 e) j/ r5 v
- JSR Music_Clear_Addr
7 x( S S4 j9 Z6 G - RTS
+ Y2 `( p( M& G - .ELSE
. ^! M. S% T- ^2 r5 ?4 w* J - LDA #$1F
$ g: |; E! I9 I# X; |+ J0 b - STA $4015 G e; w2 {% r
- LDA #$00
5 J b' x9 F, `% V8 m& ? - STA $4010; ]7 O% g/ k7 Y
- LDX #$00
; H# D+ l7 ?. ^ - LDA #$00
/ J& x3 q. Q- C/ G: p9 T# G" a -
! g2 |' u$ h. m. Y - .Music_Clear_Zreo_Page_07 Y( f. C. f9 N. J N$ |& N% p
- STA $00,X6 E) W2 w3 ^4 r
- INX0 I- Y1 |. ~( g4 o) g
- CPX #Use_Zero_Page_Begin1 n' S, B9 D; ~7 |+ z
- BCC .Music_Clear_Zreo_Page_0
) W- v2 Z* v1 j: S7 U1 r- }( Z& L0 ? -
* ^; }+ n( s/ o* t \ - LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size `$ m* u/ [* F r6 [/ U, l; \
- .Music_Clear_Zreo_Page_1! {' K; v/ Z9 s
- STA $00,X
; \# u- j# N& B& h6 h2 t - INX2 Y; h. \$ B" l9 C% o
- BNE .Music_Clear_Zreo_Page_1
1 D. a. K3 L; k* l -
) ~2 G& t; s5 Q* U7 n' W) f7 b - Music_Clear_Process_1
: I# {4 L- y7 u! |+ n. k% l - STA $0600,X' o; k: L' l7 x; E' b
- STA $0700,X
- N" ]; P2 [ A. Q8 N7 {$ J - INX! \' u5 U4 j& a
- BNE Music_Clear_Process_12 X' S: }& d; y! K) f& B
- LDA #$104 \' N* |- z" r
- STA $4000
; h' J K; N ^8 b: v - STA $4004# G5 h) E; C, S8 P9 y
- STA $400C
/ \0 a* U, Q( ~. K3 H - LDA #$00
" H# g0 ~- _' Y' u - STA $4008/ U- s2 }4 M* X0 y3 C0 A# R0 m- n$ m
- LDA #$0F* n( L( h5 v6 L9 p
- STA $40153 B" m5 M/ C9 n4 c) V- F! M! Z3 t
- .ENDIF2 ?; k! \& h# k( d
-
4 n! I, T- k0 S. H7 h$ v% f - RTS$ l3 T+ F3 \* ~+ c% c4 I
- 7 ` J* y5 T1 B
- ;======================================================================! g) p) z# }" h! v' y, B( f% p% R: g
- ;重启处理
1 `2 k+ c# c# M; W/ [6 E$ [7 l8 k8 f - Reset_Program( u) P5 Z4 X1 [6 H6 D3 C' Z
- SEI% @6 k; ~6 m4 |" R- t" d
- CLD
6 |3 ^( K0 m' L# p5 W, Q0 S% r - LDA #$00
' S9 w( o5 o l" ?0 `. D - STA PPU_CTRL$ g3 V+ f1 `! {1 e6 G: Y- a: l! i
- STA PPU_MASK
. s+ |/ U: h2 |: o# p( c, C - STA JOY2_FRAME
1 @/ F5 T) q* I2 d* H - STA APU_STATUS
& V/ C& S1 @; |- P( K$ l5 l T5 x9 _ - - }) O" ]& H9 h. Y
- ;等待屏幕准备完毕
u( \. X2 e. D8 `+ J9 I: H6 a - LDX #$02# i( h: F* j$ i% S) i% M4 }# h
- .Wait_For_Screen_Ready" u8 D0 M' }6 r- i7 r% t9 P% m+ d
- LDA PPU_STATUS: n; A0 W- ~+ V: v/ g' y! {
- BPL .Wait_For_Screen_Ready( r$ z8 |' Q* ~* s! F
- DEX5 Q$ F2 j9 Z R3 Z7 ]' z5 }
- BNE .Wait_For_Screen_Ready
6 u) T C6 f5 A - ( R, y' y2 s! J. @( i5 F9 I
- ;清空调色板- e* Y# N$ D! W- W8 G
- Palette_Clear
- k' w7 ?" X" K& U( y% r - LDA #$3F5 h. ?9 L9 {4 H0 D
- STA PPU_ADDRESS+ ^7 F: Q7 K a, O) G4 ]) |% h
- LDA #$00! O T/ ?. f0 B- c- r: g
- STA PPU_ADDRESS
/ j& S7 | L% `7 S% x - LDX #$20
/ _$ T, \ Z5 P7 e- L2 E - LDA #$0F- O3 w" @: W" t/ R# O
- .Write_Data' M0 T) G1 l3 b7 g6 w9 C
- STA PPU_DATA
3 J X4 g& U- w9 l - DEX
' h# l1 g' K5 U2 [+ X - BNE .Write_Data8 s6 l: g9 s0 [8 l" r7 s4 {5 o
- 2 m6 `0 u0 @9 E: E" r( D
- ;清除声音 $4000-40137 K9 G2 d/ T% q U- N2 ^
- LDY #$14
$ j! {$ e! ~. h- [, J - LDX #$00
8 `6 b! O. u8 i# F+ C# q+ ` - .Sound_Clear
, t* g% ~, p) \ }7 b& L6 e+ l' a/ N - STA $4000,X- Z( e/ l7 n: Z; V$ O
- INX' o/ D, M8 E6 ?
- DEY
6 r7 {& N* V; O- s - BNE .Sound_Clear$ E* y- p7 \" T! h9 `3 ]
-
" ^, ~. r: d' S - ;清除 RAM $0000-07FF& D0 ]% ^/ i$ o. n8 F+ k8 u& {1 ^# h
- LDA #$00" N& d- t B2 p1 T' H1 @6 x1 N
- STA $002 J0 V2 N+ E, t
- STA $01. N# w9 ~; J4 g, s9 R: J8 z
- TAY
2 f. z$ w2 n% r! _$ L - LDX #$08
7 V" ^/ ~1 w/ G5 ^: U - .Memory_Clear
) C0 f2 G/ T9 C0 k' r( A# Y - STA [$00],Y4 Z; @ w# d" W; ^0 ~
- INY) A$ @) q1 h( f
- BNE .Memory_Clear# r0 |0 d( V3 \ j$ B+ G
- INC $019 m; h% T. T9 V1 z
- DEX
% b# }8 E0 M& y! ~: x8 T+ e: w - BNE .Memory_Clear
, f9 _/ g. s5 P% ?0 H - 2 j+ S D" y& V3 l" ^6 ]" S! o; C
- ;精灵缓冲初始化( I- @( J* t* t. ~ Y: k, {
- LDX #$00
. h1 B( R& M; t, R+ f; _ - LDA #$F83 r7 c8 ^5 s& ~# @8 x/ l; D
- .OAM_Clear, x" h# I9 C6 Z9 w
- STA OAM_DMA_Buffer,X
" L6 L" L2 }- T* w' h. a* b - INX2 J t6 I: ^6 O
- BNE .OAM_Clear
3 D1 b5 Q5 @. Z9 m - " l! Q* c1 Z/ k2 B4 \
- ;栈指针初始化" d' s, z$ T6 w, f- i
- LDX #$FF y0 d3 `* T) x z* C- z2 z9 @7 N# L
- TXS c4 S% z7 _; J. T# J6 Q h2 |$ k( n
- - h" y! u5 R+ m1 }5 P
- JSR Nametable_Clear;命名表清空! v9 l$ F @& j; q+ q1 ]6 j
- JSR Palette_Init;初始化调色板缓冲" U5 V8 Z4 h" t' w) k9 x1 t! Q S
- JSR Static_Text_Init;初始化静态文本
' N2 c( L6 ? P r7 x$ X, H9 i - : y* A8 C& V5 b( e. i/ _' c
- LDA #MUSIC_ITEM_TOTAL - 1
3 f5 J+ D( Y1 t; x% j - STA FC_Music_Max_Index
+ O& `) n) J" e; z- g" d! D - : b- `( k5 i( n, |3 U
- LDA #$1F9 @ h" i6 ^5 Y6 l6 ~ z: \5 W: o$ D
- STA APU_STATUS
1 ~9 X5 i5 D6 F a% d% p7 D/ ^ - LDA #MUSIC_BGM - 1( n7 P' D L7 T4 k2 ]; [ N
- STA FC_Music_Index7 k5 q. o! P7 t. j* X+ o! R8 Y
- JSR Music_Init_Process;音乐播放6 U# K# s2 z! C0 |+ }+ A" P8 Z
-
! Y! H) x" N9 Y0 f - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)
5 K1 b4 M! t1 Z3 v1 M - LDA #$1E* Y w# Q8 V. A
- STA FC_PPU_Mask_Buf1 U1 p4 y# H, l2 S1 o
- ( }+ R# Q' G2 ~; @3 M0 t
- ;启用NMI处理
9 {! _% e' S z' j p N - LDA #$80) f& q% u e P' O& q" }
- STA PPU_CTRL
, ]3 y5 v Q8 B+ E -
, y9 C/ ] ?( m' U- T0 R, z' K - ;程序循环, 剩余工作交给 NMI 中断处理' p! ?8 Z8 J3 W9 L' v
- .Loop
6 N( E& n7 A; ?# {3 g5 c9 K- J - JMP .Loop
7 {: z7 X7 P5 Z" |! _' y - ' n: [1 b/ a8 n1 p9 `) F k
- ;======================================================================- O* z$ Y% x- N; p9 w: |
- ;不可屏蔽中断处理
7 s5 q+ f& [- D% f - Nmi_Program
0 [2 `2 h, @' g. A6 e. z4 ^ - PHA
0 o) c1 T9 P9 S/ `5 {0 a. u - TXA
( a Y8 t( L5 H; j8 H - PHA
2 {+ L7 _& r+ |9 r+ @ - TYA$ Q+ k- o# u2 u# o* d
- PHA
9 Q/ C. u& g2 m! y9 M6 ] -
8 C4 e/ ]- P, h, f& J1 u! P+ ~ - LDA PPU_STATUS;读取使得 PPU状态寄存器复位
' i% S; l. M o! c5 V -
8 l2 u. d8 d6 {$ @) ] }# Y2 w4 D1 z - JSR FC_PPU_Procrss;PPU处理; m0 m5 N! K* R6 L7 \! S- K- _) X
- + |; g% @# I* i# G( Y4 K: q
- ;精灵内存更新9 y/ r/ o" O2 |* G8 a1 E
- LDA #$009 N# Z/ Z. } s) ^6 w% z
- STA PPU_OAM_ADDR
8 k& n* V" V- ? - LDA #OAM_DMA_Buffer / $0100
3 q) L# H, i0 [6 t - STA OAM_DMA" E2 ?# s7 { o" R+ A/ J
-
9 u! M) E* @# w - JSR FC_Gamepad_Process;手柄输入处理
+ K j% p' X# ?7 R* f - JSR Music_Select_Process;音乐选曲处理/ ?) n. q& E: G( Z: W
- JSR Music_Play_Process;音乐播放处理
) C* E# z( F) \7 S6 r -
& K, _. ]5 L3 s+ ^; I - PLA5 |( w$ O5 t, t
- TAY
$ q- H5 r3 H4 k# E; @& @4 H5 q - PLA
* u7 H; \0 i7 X7 m - TAX3 h3 W \7 i4 Z" M
- PLA p+ g/ x3 y2 a
- 9 a$ C3 {& q0 s4 z5 n/ N6 ^
- RTI
8 ]9 \, @. G }* A# C - 1 y, k7 P% O3 o5 z6 y, t/ c2 M; Z
- ;======================================================================
' z- {( A4 U% }2 a4 s% Y( ^+ J# h z - ;请求中断处理) f- Q2 a1 n' ^! o: A/ B
- Irq_Program9 m0 E3 ]3 |1 c% q- f
- RTI
( \$ A2 G0 Q% m, p
r0 q' `2 N; V4 ]- ;======================================================================
7 l! K3 p7 u! K7 d1 Q - ;中断向量表. e7 @; S; i" J
- .ORG $FFFA
; s# _: F& M. j2 T1 l - .DW Nmi_Program ;NMI触发时执行
0 }; B0 w, h9 o' O - .DW Reset_Program ;载入ROM时最先执行
6 N2 ~" B! D! D. j - .DW Irq_Program ;IRQ触发时执行
6 x/ }' m5 H, U: N- a+ { P5 Q
复制代码 & R* v+ r9 ?* Q
% g h4 |( m) J5 r6 v, |: f) k: N( u* N! G9 o$ x
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