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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下# i! q! x7 v6 x2 ]) A1 ~4 z& l1 I
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以下是主框架代码: R* ]) k. Z8 y5 j3 w( f
- ;======================================================================
3 R+ Y7 a* r& D3 }& R - ;文件头( v9 b7 j; w3 L. B0 j
- NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量& ]: k9 V I: W3 n7 c, x
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量
& L+ [6 Z. x& g1 p; o1 M% v - BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码
5 B* {$ L- d* h" k D8 h( N - ;======================================================================: b. n4 Z( G5 d
- PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2
0 R c# i$ A: ^. n p' W - PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1% |) H5 k' E! @1 G
- ;======================================================================
0 \: f) [9 E; t6 c n - RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
) B, [) V# t% p* G. Q8 q: | - RESET_ADDR = $E000 ;主程序起始地址
2 y* h7 j4 T. h0 i' } - ;======================================================================
! \& n8 p/ ~( t6 r9 @6 |0 M - .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB& l9 b+ _" ~( S. y% K+ Q" B
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB
6 B" N# w, X8 I - .INESMAP 4 ;Mapper号 (0-4095)$ e$ K8 K$ F- T- l8 c$ M$ j
- .INESSUBMAP 0 ;子Mapper号 (0-15)
0 A- k1 L9 C3 Z$ g - .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)
0 ]/ z8 G3 F2 K u5 Y/ O - .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)
$ Q& F' H5 ~0 R- ^5 H# P" G - .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)
2 d o9 \& J- q' t# \3 d - .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)0 G; t! z0 U- V5 C8 }
- .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)
- Y2 X) z; n! m2 S( D; s* T- L - .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)
' S& m" @% ]: \# a9 O; Y$ B - .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)% [$ `% W- D0 a1 Q% L% n7 u4 s
- ;======================================================================' s1 t2 G1 a: E, d" g
- .INCLUDE "fc_demo_config.asm" ;全局配置9 I7 R% ?, r; w9 E$ _! f
- .INCLUDE "fc_demo_constant.asm" ;NES常量8 f. \) P" M; J& A/ o+ M- k- g# H
- ;======================================================================% B- S# j3 P2 \: ?0 _& {: L/ Y
- ;音乐配置
5 h: `0 F4 d. ~ - .IF 0 = MUSIC_THEME 6 m6 H5 J1 K5 @( G5 R4 N( g
- .INCLUDE "data/music/Gremlin 2/config.asm"
0 b9 [' s4 I% e5 w - .ENDIF' J( B, m, V6 o/ }8 s$ B
-
6 j2 `; c; n9 _; x - .IF 1 = MUSIC_THEME# f K) |9 |9 G/ U1 a
- .INCLUDE "data/music/Raf World/config.asm"
! E# k& K$ A: p( S( \ - .ENDIF1 W* `! t5 N) g0 r2 d" z
- ; L; R7 z4 X+ n. a- H
- .IF 2 = MUSIC_THEME
3 `4 _6 L" S! i# v& n1 _ - .INCLUDE "data/music/Ninja Gaiden 3/config.asm"
- q* o, R, l6 K# z4 ]: l2 q1 \ - .ENDIF5 O# \1 N0 ?- F! C7 q
- 6 u8 E8 H$ ~9 [! _" E2 l0 }
- ;======================================================================
' u8 A A' N2 V8 m5 V3 y - ;引用CHR图像数据, \* q- W9 c5 n2 X. M& y6 m$ O
- .BANK NES_16KB_PRG_SIZE * 26 @* p, M, x$ J
- .ORG $0000' b# R! A9 ^# j) z7 L. i0 W
- .INCBIN "data/bkg.chr"
3 i$ I, r+ Z: p1 g( a' I - .INCBIN "data/sp.chr"7 T, u: g+ M2 e \% ~, y9 M
-
% M2 R7 t, ^. d9 E - ;======================================================================" H3 y6 U; |3 ~# Z" \0 o
- .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank
3 U) f) o; ]; f8 C" q, g% z g- U - .ORG RESET_ADDR
7 h3 T7 y5 I+ l2 {. t1 |/ s' ~ ~( e - ;======================================================================
% _* P* U. h/ p; |! [8 S% I% ~ - ;引用其他源文件* O; i) t- s* v: C! n
- .INCLUDE "fc_demo_ppu.asm" ;PPU处理$ W }% V- m3 ~9 l, Z
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理# a) D, L2 W" r2 z
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理0 @& m6 T1 |/ Y( [! w
- ;======================================================================
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- ;======================================================================) t* @- V5 T0 `4 Z
- ;等待VBlank到来( \6 x8 r: X5 y" ]" o& b% Z8 U( {5 ]: o {
- Wait_For_VBlank
: H+ h( a `2 ~7 k' {- A5 [ - LDA PPU_STATUS3 ^$ `; j8 ?2 H- W( f2 p9 q
- BPL Wait_For_VBlank G+ F$ r7 [: {7 r
- RTS
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: k( h# v0 I5 `& f- z, ]- ;======================================================================
|, r- U% R5 u0 p7 l7 i; B* n - ;调色板初始化
6 a. J7 H& I+ p0 n - Palette_Init/ i) Q |+ {9 W9 b$ I8 B
- LDA #$3F
2 T1 h: Y- V R: j g2 J - STA PPU_ADDRESS. ~: P3 Q. ?* }3 K, w
- LDA #$00
6 Q7 \; E4 p& Q% a/ y9 P5 n0 ^ - STA PPU_ADDRESS2 d6 ?" B* B! B' C0 z) N
- LDX #$00
+ y2 R; @+ ]4 g( n) C) R' b- ~ - LDY #$20( }9 `0 q) t( J! e- [
- .Write_Data
( r6 b- n% J% Q3 n) m% q3 F8 d" o - LDA Palette_Data,X) m' [# i8 U- K- ]# a
- STA FC_PPU_Pal_Addr,X& k; n8 l# G/ s7 j$ Q0 {9 z) u) O
- INX
# n6 e0 _# n! }( D' F- O1 H8 ?9 O - DEY1 g) K8 W9 ~- Q1 d
- BNE .Write_Data7 o) @ \9 N( \
- .End
a( R6 L5 J( T) O5 P - RTS( }6 w/ v5 p" m& `. j" A* k
- + Q5 @& v1 l+ r3 M, k1 v
- ;----------------------------------------
* T9 P7 R& w u6 k, |% F - ;调色板数据0 \, }4 [1 w$ V! X7 w
- Palette_Data
: ^. H0 M6 }9 E" p: r - .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B& [/ {& j- d2 H8 b% n+ ^
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22- r+ `; j- `9 X# ~, C5 t% H8 i' l
-
+ v* O3 s2 [8 F/ o5 A - ;======================================================================
1 X+ ?; L0 d4 y+ L - ;命名表清空
" ]( O4 Q d) M+ k E9 q! d - Nametable_Clear
4 d, H8 e8 V; M5 M - LDA #$20 ` r& n* B9 y+ w, E! r& B X* q
- STA PPU_ADDRESS2 a! d, ]1 r2 }' | w% W
- LDA #$00
h+ w' N6 k& _6 ?6 R) z - STA PPU_ADDRESS) O; }- v: c$ Y/ _$ O
- LDA #$00" F; f d0 R4 R8 m3 x7 R1 C
- LDX #$00# G3 T# y' V9 ?9 s
- LDY #$081 M6 u- L3 \; w+ i' x! }3 P
- .Write_Data
" i5 \ q& S+ i9 r" Z - STA PPU_DATA5 i B! V2 o0 O# O4 r8 o
- INX K% \/ h' h l# ?5 l( C5 n9 E& ?
- BNE .Write_Data9 p! k L/ Q" q u5 U" X( l
- DEY1 X8 E* \* |: B; W( O
- BNE .Write_Data5 ^# e. r+ Q5 r3 E+ T
- .End
0 _' ?9 g8 s' k* r6 u - RTS
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- ;======================================================================
- p1 x3 @6 j9 R, q: ], F! L' W - ;音乐曲目切换! C r! U7 |; W) X. r. V
- Music_Select_Process |' W( ]: d3 X' k5 Z% \ V
* h$ N) d$ F& ^% x% Q5 }- R1 a9 Z- .Pre_Music;上一曲! Y' L4 c [& }. D/ V. ^ ^6 J
- LDA FC_Gamepad_Once
* q8 H8 g4 V' `6 `* s, Y - CMP #JOY_KEY_LEFT. v/ g0 A+ I2 ]: F2 m
- BNE .Next_Music
4 b' r5 u; L8 ~" y3 E2 D - JSR Music_Play_Pre
& \7 F* G0 j$ {$ t. Y" a; S, ` - .Next_Music;下一曲
/ C( k- A8 ~ S7 q: D2 j2 k: m9 S - LDA FC_Gamepad_Once
/ W. T' M3 ~9 h5 ` - CMP #JOY_KEY_RIGHT' m' S1 q' c3 p6 E
- BNE .Next_10_Music Q7 z. a" j9 ?/ P6 }5 a
- JSR Music_Play_Next4 l4 Z3 \/ X; H$ x! i: O0 S, y
- .Next_10_Music;上10曲
2 l' @* | @# X* p) N6 ? - LDA FC_Gamepad_Once
" w+ H I7 }$ G g' f! k - CMP #JOY_KEY_UP
' T( W$ ]( H3 V/ E8 X4 d% R - BNE .Pre_10_Music
7 M! g* u4 y: R2 A& m3 j - JSR Music_Play_Next_10! |9 I' U$ \" E/ i- G
- .Pre_10_Music;下10曲% T. K6 I4 A! x) W( f) J& W
- LDA FC_Gamepad_Once
1 i% G. m1 a6 c# a - CMP #JOY_KEY_DOWN
/ ?, ?6 ]: Z# C# d2 D2 E - BNE .Reset/ d( P, _( Z2 ?2 O, ?% Z4 L
- JSR Music_Play_Pre_10
: [4 }( Q5 ?$ P5 d% G. m3 \ - .Reset;重播当前曲目
, x, s5 E# ~5 d+ g/ E8 ^ - LDA FC_Gamepad_Once6 m5 [/ `1 x( L- E- A( h
- CMP #JOY_KEY_START5 m9 z ]" H' V7 R" P# n3 J }& n
- BNE .End g3 {- p. k3 a: \3 a- y% \
- LDA FC_Music_Index
- a/ p9 J1 L& Y5 n4 H4 u5 ^) P - JSR Music_Init_Process
: A( G8 c1 Z' |: z - .End0 M5 g4 L- f- X5 v3 J
- RTS
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- ;----------------------------------------------------------------------
) ^, Z, K" k) u5 x& g q - ;播放上一曲
; f" `/ U' x1 c# J3 r1 ]5 y - Music_Play_Pre
0 O" p7 D' L5 b2 R9 l - LDA FC_Music_Index' |0 R8 g7 y8 t( p3 w
- BEQ .End' D1 }6 \) ]3 D2 m7 @
- DEC FC_Music_Index
) G x' Z* z( m9 h# \& N7 w2 r - LDA FC_Music_Index
. C0 {+ S- d) v7 _/ S& A) l - JSR Music_Init_Process
1 j/ a7 l4 {. k - .End# Z5 P3 e: c" Q+ t6 _
- RTS
, C, q) Z% u( c - ;----------------------------------------------------------------------! d) J3 z0 k* J0 h
- ;播放下一曲& [$ D H9 ?/ G1 l1 T: r
- Music_Play_Next T+ A3 ]5 }9 l" g( d
- LDA FC_Music_Index- K g2 h( J! M0 C) p4 }
- CMP FC_Music_Max_Index6 H* @! p/ Y% ^+ u* L
- BCS .End, r( q1 `0 R6 D. G
- INC FC_Music_Index
) e5 a$ l) T3 l7 `: K2 g3 @% O - LDA FC_Music_Index" K: o" w" s9 N2 r: q" G% E
- JSR Music_Init_Process' G9 d& {% N9 S+ L- J4 I5 \
- .End
, A! c( q) v7 f0 b% c( B+ M, Q9 ] - RTS
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0 t" y* `, m. h) Q6 _- ;----------------------------------------------------------------------
% s1 A% z, j( ^4 T( a9 O - ;播放上10曲7 q G% a3 I \ N
- Music_Play_Pre_10
/ n7 F# r! w* @1 Z' t* A% d - LDA FC_Music_Index
/ }8 Z# c9 r ^, i* Q# A* |3 [2 R7 W - BEQ .End
4 t- E; D6 O0 P% Q. l6 H) ` - SEC. z9 j6 R% E$ X( M
- SBC #10
% v" J2 P8 h( ]* k0 t1 I - BCS .Pre_109 s5 j' {9 E5 t) k' o
- LDA #$00
; C/ s5 g1 ~8 l- o - .Pre_10/ Q/ B# F6 G, o+ i O" E/ G
- STA FC_Music_Index
9 K& H n& N1 z+ y2 T6 q* \# c - JSR Music_Init_Process, n! J, k ~" o; \, t; M! l, h
- .End5 }5 W. P" a% y# y0 T
- RTS
9 s8 e4 u s5 ~0 e) B0 o. K - ;----------------------------------------------------------------------# [2 U& T( F+ g& g8 k
- ;播放下10曲" }, z4 m# O8 \; n! W
- Music_Play_Next_10
' u+ s0 O% L0 d: e# l# ~! D/ E - LDA FC_Music_Index
! h1 i, i7 k) s8 A; ~ - CMP FC_Music_Max_Index
% j5 U3 h# h; N% ?3 A - BCS .End
" `9 `3 I t5 W7 k - CLC) F2 e5 P5 y# Y, b* ]' Q
- ADC #10( a/ ^3 ~0 P$ ~$ X$ M4 K! X
- CMP FC_Music_Max_Index8 v2 n L& s* d$ D2 o+ a- q
- BCC .Next_10' [2 V# W# |. N: Q: h" V( h$ ]( {* l- d
- LDA FC_Music_Max_Index
2 Z; n6 z& x5 M5 I - .Next_10/ t8 \: m3 \# Y$ {- ]: ?7 k, Y
- STA FC_Music_Index
1 k: f1 l- p3 S b7 {, C2 i2 g - JSR Music_Init_Process [# Q' ^+ D6 \3 l* U, B. B; S
- .End
5 N1 d7 ]$ z5 \, g - RTS, y" ~+ h1 a% v q5 J7 k* S2 ?
+ W7 q$ `. s0 \2 S- ;----------------------------------------------------------------------$ m: t7 c/ H; }$ D4 U( `5 Y3 a
- ;8位十六进制转3位十进制制 I- _" ~8 F8 F: F: w
- Hex8ToDec
/ W6 B# r) H [; B - STA FC_Dec_Data_1
t) d2 }) {+ P/ T* `# B - LDA #$00! |3 q' M% `- ^5 `" |
- STA FC_Dec_Data_1003 l" _7 [1 ?; M. P, v: F
- STA FC_Dec_Data_108 E4 J I# n1 R+ z! i+ f6 n; ]! ~
- LDA FC_Dec_Data_1
) Y3 U# ^" v) @; { - .Convert_100
O0 r/ B& @% a% r: X6 Z2 O( b0 J) n - CMP #100! P7 `. y6 G- ], P z& l/ M
- BCC .Convert_10
: s' ~ W+ m9 o0 a8 T" q/ W2 H - SEC
: ~+ E8 a& ]$ w, j4 `. k - SBC #100& |# j+ }. f' |6 ]" K
- INC FC_Dec_Data_100
2 C! ] ?- r0 n/ ]$ `) q - BNE .Convert_100
" w: G4 c ?! P+ o; g+ c% p - .Convert_107 K; Y6 P4 t9 p" Z* o) A
- CMP #10
, G( y: R' [, t5 d/ ]6 H& [ - BCC .End
& W7 ]$ x' l! Y; d- L% K - SEC# M1 f$ U! P( A4 \5 l; S9 F
- SBC #10
5 W9 O9 u0 l1 Z; f) z - INC FC_Dec_Data_10
# v. O+ N2 h6 I! C - BNE .Convert_10) ?3 ^, y: u2 R- }! M
- .End
* x6 E& R3 n+ f9 Z# s3 R/ O - STA FC_Dec_Data_1 S' g0 G5 b4 k% m
- RTS
1 S. F J/ E) z2 t3 {/ ], F- F - ; S d3 F# ^8 O+ Z3 I/ l
- ;----------------------------------------------------------------------* X. M2 F* j( N% m* \. v5 `, W( p
- ;显示曲目信息
- {8 ~8 ]. e' F! E* Y/ _$ a - Music_Info_Display& n% x4 ]( s( V2 j
- LDX FC_PPU_Buf_Count
$ T* _1 O& U+ X: ] g( H - LDA #PPU_WRITE_MODE_CNT_LINE
7 z# C6 G3 j. }- _5 v$ x - STA Use_PPU_Buffer,X
- {/ h2 Q, k1 M! x3 L2 @2 i' P6 v - INX) x- p; a3 T8 A- n3 N9 q7 `
-
: m. Q. w2 w, c) R3 ~ - LDA #>MUSIC_INFO_POS2 z7 E/ d+ n% e' C" o: X; n
- STA Use_PPU_Buffer,X
7 V( I" F9 d' C' F2 Y0 S% m - INX& F% }: B* n2 j6 _
-
$ J& |1 M/ y* h( v& S% d6 {" v; E t - ;居中
7 o2 t) @1 y, S- X: t: b$ P - LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2; F- H4 H8 E+ X m8 a9 u) k5 @8 G2 q
- STA Use_PPU_Buffer,X9 T8 b1 R* x" l- Z) s' H6 ^1 r8 Y
- INX
5 J/ Q* ^7 ?8 G! e) f; D' ]: @. B6 `9 Q - 6 o1 @5 P; }) ]# j* |
- LDA #$05! ~) y+ f* p; d# w% P5 r2 g$ X
- STA Use_PPU_Buffer,X
. O' F+ E* ? i1 ^ - INX
! d; \" g! g# F4 A# i' V - 3 r0 u" j$ a6 L( O
- LDA FC_Music_Index
. N6 W* e3 B% }, v' d0 h! S, A9 E - CLC
. z" g- `+ ?5 G) O3 e6 P( U" @ - ADC #$017 ~* J2 S/ ~0 `' C' ^+ W
- JSR Hex8ToDec
% N2 T9 T$ a" b5 d8 t, w, E) ]* ^ -
! R" Q) b N2 K1 K, Y. M - LDA FC_Dec_Data_10
: b2 v- Y1 T) A3 b - CLC4 t/ {9 d1 o" C9 a" ]# d2 `
- ADC #'0'# Q/ K4 C/ i! R2 z* D6 H9 L
- STA Use_PPU_Buffer,X
) j- Z4 s9 B v/ J) {% i3 g - INX
* k9 ^% P, `) _4 N4 T( ~ -
2 X, {! q' x4 k+ t& y! ?' M - LDA FC_Dec_Data_1
; I) Y2 @4 G: Q& c- Q% Z0 s - CLC8 o6 ~# _3 o( A% A
- ADC #'0'. \. d8 T* y: f6 I4 \, u
- STA Use_PPU_Buffer,X
6 |' Q0 ~6 v J - INX
2 B# r, h. J; H1 C K8 ^: w. c -
$ K, ?# Y8 r2 B. L% }8 W - LDA #'/'
* ]9 w2 l# {4 p% [8 j - STA Use_PPU_Buffer,X$ ]8 P3 I3 e# v B
- INX2 Z$ L P! l( w. B' M4 G& f
-
+ _0 l1 P' E5 ]4 ^- l - LDA FC_Music_Max_Index2 i ^/ O9 q' n" v# M" s, F; T
- CLC
# E8 P% f- s6 Z, b* e5 P4 B% X - ADC #$016 {# k% z1 K$ l/ r8 ` C O! k
- JSR Hex8ToDec0 \( g, x1 a( y$ Z! x
-
& \6 l0 \ S! B' y - LDA FC_Dec_Data_10
, M4 x0 {% {1 |, a: u ?; O - CLC. d& H0 m2 V& ] J/ o
- ADC #'0'8 F1 }3 F1 S }% a* _
- STA Use_PPU_Buffer,X; j5 E' Z- M, Y8 @7 ~" I5 f) A3 c" M
- INX
# J( y% c1 t s* c9 _2 m - 3 p' F" L. u9 [0 }
- LDA FC_Dec_Data_1( @) P1 ?% B+ N: O- l) H
- CLC
! Z7 _4 y' ?* _( c - ADC #'0'6 G# T3 B4 W6 i( h+ M
- STA Use_PPU_Buffer,X
# f% c* C0 g0 F. g% \7 t% P - INX, W' H( X' Y) q" ?( }8 l0 r4 M
-
+ W9 P; o/ ^1 z) ]9 s - .End; C% t+ i3 A- n# K5 t; x
- STX FC_PPU_Buf_Count: H5 }- S; {4 Q3 @+ ~' M
- RTS
1 w, e8 A/ A9 J0 x v3 k7 U
+ C- m9 S% V; V- k* [5 [- F- ;----------------------------------------------------------------------
. V& j4 z. b% L/ H8 |) h/ |. x - ;音乐曲目初始化处理5 |5 z$ s4 A8 F& F. B
- Music_Init_Process: {1 K) ~/ I. P8 i+ H$ `% g0 r
- PHA
; B8 ]: @" {5 F) E9 F - JSR Music_Clear_Process
# g9 c) Q6 H9 O* o- l, s - LDA #$1F9 ` r" }& [6 s0 w
- STA $40153 y" a4 A# K, N" A
- PLA* j; F! e: {- K
- JSR Music_Init_Addr4 w: i. f; o* y4 i! k
- JSR Music_Info_Display
0 M6 Y2 C: R# _/ ^$ T9 I: N2 e3 [ - RTS
" K+ I5 a+ l7 H) W4 G - : F7 T* [: ]: b: P# a% x
- ;----------------------------------------------------------------------8 t; n! Z5 z. k) X
- ;音乐播放处理" c6 E3 s3 e8 ~0 u7 r. d" }
- Music_Play_Process
1 ^) t4 w( q! F2 f e$ b( p0 ?/ _ - JSR Music_Play_Addr
3 Z" l- f6 F; q; v: J3 ^ V - RTS- s# [# Y4 s2 u7 v. j7 n
g! @: K" N( Y. ~; ?9 ?- ;----------------------------------------------------------------------+ k- v0 N/ E1 G
- ;音乐播放处理
+ E0 N8 f1 C& {8 O8 b+ G2 F) [9 r - Music_Clear_Process n! `5 P7 h$ |% x& i( n; R1 M
- .IF Music_Clear_Addr2 E5 v" a1 g5 k9 B" ~% [# Q
- JSR Music_Clear_Addr9 K6 l0 k# z3 H/ d! {; F$ t5 r
- RTS
' U6 z3 D2 u) e% v0 M - .ELSE
|6 Q- L+ h0 f- B - LDA #$1F
. E7 `8 D) H$ A$ M7 u7 ] W - STA $4015
- E0 F5 G% K/ x# ]- K D z6 u& y - LDA #$00
% G) x% [" _, {( t" B4 V9 x6 B - STA $4010# p( g4 e" ~8 p
- LDX #$001 ?% I9 C1 q/ b2 w" \
- LDA #$00# o% T) d4 U H
- $ S+ @8 x0 P# K3 P) e5 c1 r
- .Music_Clear_Zreo_Page_0
4 g( f; V H. G3 E% y1 w# d/ _ - STA $00,X
! y2 q e) |; ?! v3 ]7 @% J - INX
# D/ B) ?+ r: y- W2 C+ O. H - CPX #Use_Zero_Page_Begin. z5 G! _+ u+ p) ?1 a6 D) b- y
- BCC .Music_Clear_Zreo_Page_0
. G$ d& Z! J6 m6 U( H5 i -
2 Q! Z1 H8 Z7 {, _, J5 l - LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size9 I# b2 N! o: |. w9 w
- .Music_Clear_Zreo_Page_1& h" X6 Y( q2 ]
- STA $00,X: ^7 D: e( i) Y; v; x. ~3 E
- INX
2 o4 O6 w! m, U# _2 l - BNE .Music_Clear_Zreo_Page_1
d4 K3 _, v; }0 D - 7 R3 O6 g. d* j7 O0 [! V( |3 e) e
- Music_Clear_Process_1
! ?. i7 r& k/ t" U+ \ - STA $0600,X9 x% t" r) e. k4 y2 @
- STA $0700,X
; K2 p. U0 ] o8 B7 s& V' { - INX. v3 f% J) A* V8 q
- BNE Music_Clear_Process_1. M3 H: i. E- E+ f
- LDA #$10
3 W8 {/ f+ P+ N; A - STA $4000* ~9 Y2 M3 t+ ]) l
- STA $4004
/ I8 ?5 y O4 y+ w - STA $400C
0 e5 @* ?, i2 T: P; g4 E9 M - LDA #$00! }& j) [+ ~4 k9 @$ w
- STA $40082 |1 S) r9 w( d1 T
- LDA #$0F; p$ |8 L# Q! J0 d
- STA $4015
; U0 z- r9 q$ C; P3 u - .ENDIF% Q G8 A1 d: |' ?5 L
- ! V5 ?: h! X2 b* |3 G8 |5 c2 ]
- RTS
& Y: s& u$ S: J$ \# P% [. l- U) E
5 G# K7 f* s5 e: f0 Q- E- ;======================================================================, i( l! C: h0 H: y- c
- ;重启处理: M( j: }) O9 ^
- Reset_Program
0 J7 Y5 N `8 {* _ - SEI' F6 H2 V5 p& O& H2 A# z
- CLD8 |' {! v: v3 Q8 M9 h
- LDA #$00
; k* r" U! }; k* t- h; ^ - STA PPU_CTRL
! B$ J6 I: U& r2 i4 D! _ - STA PPU_MASK
8 t4 Y( b* t+ a5 @1 g - STA JOY2_FRAME
6 u9 z8 X2 J: t4 y; [ - STA APU_STATUS! s- J- E! p: ?4 T( G- k
-
- A8 O* Z1 N: e - ;等待屏幕准备完毕, s& w( O# n7 Y5 F6 s" E# h
- LDX #$024 T6 p7 c# J, e% n
- .Wait_For_Screen_Ready
3 J2 u" q2 D, k/ G- ]$ k - LDA PPU_STATUS' [" s+ g% D5 Q0 Y
- BPL .Wait_For_Screen_Ready/ J& v5 y! G# T
- DEX
! {9 k3 x( r* `1 I0 i7 ^ - BNE .Wait_For_Screen_Ready2 P: M! M# m. t6 y, N1 d
-
' V+ t4 \# k) U - ;清空调色板
* ?1 j4 j& \. ^# q" R1 F - Palette_Clear
; |& J. X$ A7 @$ e) i X, e, }* h f - LDA #$3F3 o1 u6 ~9 F. N1 d ~# r5 X/ X
- STA PPU_ADDRESS+ [, H) _3 h. h5 o; c+ a: j
- LDA #$00/ ]" g$ Y% [" {3 w- g1 m- |6 _
- STA PPU_ADDRESS
, f% S' v0 U$ z' U/ r* I7 { - LDX #$20* j: h( F+ X: K1 |8 u S S
- LDA #$0F" s& o" t" P2 `
- .Write_Data! B& | |) E. C8 q, Y# A& f. ~! O
- STA PPU_DATA
- m9 _( F& s7 u# {( m6 _ - DEX) Y- r% a, ? a$ p9 J C) H( v/ b/ T
- BNE .Write_Data
& I" T# ~3 T2 l* Q - 4 J) B# s- J" N/ H5 g. h+ m" Q2 l
- ;清除声音 $4000-4013( l0 a3 n% m! g; u3 ]( W5 M* b2 o
- LDY #$14 {% K/ L0 l& j0 o7 g
- LDX #$00
- D7 ~5 n/ V4 m+ C) @) P2 `$ f - .Sound_Clear
$ l5 P1 X% f& ~+ Q& U - STA $4000,X
7 C p- {9 v- e% c% \ - INX: F+ r% N# C1 g. G) D) l
- DEY5 u6 G% c) s* j* E3 t( f
- BNE .Sound_Clear [8 N8 q e. a$ P' a1 S
- " i _$ C; E4 M% B" B
- ;清除 RAM $0000-07FF
: i* o5 Q+ U& x" [% u* u' X! P - LDA #$00% F/ c9 `% m; U4 K! `
- STA $00( ?0 c: H$ c; m. [. N7 T3 |$ \# d
- STA $010 o* `& w. }: E" W% _" N
- TAY
* Q( z; ~9 R* ]8 |: m - LDX #$080 j5 Z9 u7 h! O
- .Memory_Clear5 n: |, d; U2 p! v* d
- STA [$00],Y( u$ i: N9 \0 B" }+ T
- INY4 D% F4 j4 l9 ^8 ?/ q
- BNE .Memory_Clear* C' D- x/ q$ ?6 r, b0 v& ]3 R' G2 \
- INC $01& S- u L- V9 A F9 L u7 R
- DEX
* H7 |5 M( d5 B q/ c; E - BNE .Memory_Clear
0 `4 E1 e, K/ W# [+ m - ) c8 W ?, n7 T0 d$ b
- ;精灵缓冲初始化
' ? P$ Q3 ~' y: V! c - LDX #$00% Z9 h! }9 ^) c
- LDA #$F87 a9 `- v2 \! p! ?) [9 u
- .OAM_Clear; i! Q- G( |. r. t# Z
- STA OAM_DMA_Buffer,X6 a9 U' j5 l2 X
- INX
* h5 B( c- }2 W/ w - BNE .OAM_Clear: a6 y& h2 ^7 u/ P3 G5 e
- . h% I1 k- w8 f! Y( s+ X7 B
- ;栈指针初始化
# T+ [3 W5 k* V+ f8 K& g& [& k - LDX #$FF
- [! X/ l G! M( \- |/ Y - TXS, u( y. \( ^1 j' E6 g2 S
- + g! x4 I& m1 @4 E d: T3 i& ?
- JSR Nametable_Clear;命名表清空
* t) C5 Y& x3 Z2 U+ _; {9 M( O0 ^ - JSR Palette_Init;初始化调色板缓冲
9 x! g1 j! a2 ~. F" P9 w5 P - JSR Static_Text_Init;初始化静态文本
* H; ~" }! q! F/ | - # j5 N; x4 e5 h+ ]5 g# F
- LDA #MUSIC_ITEM_TOTAL - 1
# ~ r' a8 `0 D3 Z/ Y! F/ ^ - STA FC_Music_Max_Index
x1 e! L1 y5 `( J+ ? - b) D8 H2 Q9 y5 J0 L
- LDA #$1F
+ M' z& ?& \* X2 G4 J& a - STA APU_STATUS
) r6 J( C* G/ t+ J# z1 T$ M5 T - LDA #MUSIC_BGM - 1
, E, W: B: q. f7 c - STA FC_Music_Index/ g# t! t& A/ E
- JSR Music_Init_Process;音乐播放/ b% {4 V3 {- T1 d
- # w# V$ b* p4 y7 |) o- i
- ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)
% f8 e5 B* J% \ - LDA #$1E0 B! b9 [8 `5 m, j* v& z% G7 X# _
- STA FC_PPU_Mask_Buf
$ m3 Z3 P! l8 K% p6 I5 K, ] -
( ^! |7 S9 Z8 O% ]$ f ~' O; W - ;启用NMI处理
- q% {$ Q. Y3 n6 A - LDA #$80
* e8 U7 s$ k. p- N! x3 |4 E - STA PPU_CTRL1 Q7 y3 B, D( d
- , o' g; H* B: \' h
- ;程序循环, 剩余工作交给 NMI 中断处理
8 p7 K6 L% r {" A5 e9 S - .Loop
' c' L4 {- S l5 x! b - JMP .Loop# w6 c0 C* d, @! Y2 }
1 `- Q* |8 O. K- ;======================================================================
( E5 e6 v/ ^, X% i* r" n - ;不可屏蔽中断处理
9 ]7 S/ r( S5 y/ ^0 ]9 p - Nmi_Program
! Q) q' Z9 P7 m- |; A, N - PHA0 p; \ P& o" A3 `
- TXA' Z0 s* s6 k/ M# R$ d
- PHA
7 n: Z. o( \- d! F$ R/ Y& z/ @+ o - TYA d2 h6 G: T' G6 Y$ m" n
- PHA
' B, G5 C" }6 M2 M; ]+ m -
; J# t. K1 I9 i2 X. G" x8 D - LDA PPU_STATUS;读取使得 PPU状态寄存器复位! X! \/ t1 M+ @: t; I. Q
- 8 E! r, {8 ]1 N5 t6 y
- JSR FC_PPU_Procrss;PPU处理
( f7 c$ {: w: } - 9 w/ I: q, w8 A& H) a! y% ?' `7 m
- ;精灵内存更新* V! W: O( k2 U( Q: t4 R! T
- LDA #$009 D; K/ M( h% O4 o) e/ w! |. d! B" q
- STA PPU_OAM_ADDR( d5 y0 K' @ ^' E- E
- LDA #OAM_DMA_Buffer / $01007 k# Y% k' E5 J4 Z# J
- STA OAM_DMA
2 }3 a& A( l% G1 S -
" s7 Z( a3 I# B- r2 o. | - JSR FC_Gamepad_Process;手柄输入处理
|8 f! O) \7 D7 { - JSR Music_Select_Process;音乐选曲处理& S9 q0 J0 E( r
- JSR Music_Play_Process;音乐播放处理
M+ H0 j; R4 C$ ]0 P8 y -
- I$ ^. B" J& n) l4 B" J - PLA
7 a! q+ l' l) ]& |: x5 p' x7 z5 N - TAY
+ {" H" n; g5 b - PLA
6 Y/ ^* h5 K+ B) i' e$ Z - TAX
4 t0 R( N' q) o$ B5 Q4 S1 G - PLA6 _6 k7 O- l/ B/ V6 \
# {9 q5 P% D4 [- RTI
0 M3 }( ?+ u/ ?% t( B9 U9 V# c
' F! l! A9 V1 d( r- ;======================================================================; D9 L. L! q/ v9 `# q2 t( X& W
- ;请求中断处理
9 f; A) n9 i* n5 J8 _6 b% Z/ \ - Irq_Program; M+ V) C0 ^; s8 f7 @3 Y1 A4 t
- RTI+ m- o% t" S( j% O" ]2 n
- ; v# N' [3 r1 Q
- ;======================================================================# G3 O! x. K: M- {: y
- ;中断向量表( }9 c5 U' y X1 S! D$ y7 E$ }% }
- .ORG $FFFA
, g5 l3 m6 W. d5 z! r* W! O: a) ` - .DW Nmi_Program ;NMI触发时执行; S2 X0 | ^ d1 o: n K
- .DW Reset_Program ;载入ROM时最先执行
5 X' c H( z! C3 N- p7 `" z - .DW Irq_Program ;IRQ触发时执行
2 y m) x6 e! z1 d" _$ Q
复制代码 M/ _- {! @5 H! Z8 ^: y
. b6 |2 N8 u9 d
' }$ f* u$ Q( }https://gitee.com/flame_cyclone/nesasm_3_2 |
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