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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下. |& w5 Q- c5 T& }: N7 K, n
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以下是主框架代码:. |/ O8 l- [/ q, J* l+ {# `- r
- ;======================================================================2 H Z7 Y' g. u4 J1 ]$ u
- ;文件头
( p/ E: L& L6 ~5 } r4 B( @9 R& j# @ - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量
+ H# s6 P( K' Z2 ] - NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量
# ^4 g/ n4 N1 j/ J0 B3 y - BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码4 E) x1 c' {6 C: S7 `$ S
- ;======================================================================. f1 o' M% `( `) w' i
- PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2
1 V7 G$ U9 ?3 Z - PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1) U, i/ K' v' P: Z
- ;======================================================================& E6 j9 x% ?) C0 C9 l+ h. R, O
- RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1, ?& R! Y7 `% n* a" e; U2 l5 m$ Z
- RESET_ADDR = $E000 ;主程序起始地址: G$ X# ?, B2 }
- ;======================================================================( M- E! X( B d- @' t7 v
- .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB! H% r8 g3 l: Y' \
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB
9 x; S& I6 U1 m. W& v - .INESMAP 4 ;Mapper号 (0-4095)
; k8 Q7 s l& y, U4 E - .INESSUBMAP 0 ;子Mapper号 (0-15). f9 H5 f L- Z, Q. n7 T
- .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)
. ^" n1 V, |2 U! M - .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)5 O1 ]% x. S( R" N! Z# L: y
- .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数) @$ y- i3 r* T& z
- .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)
0 c/ p2 L- m, J3 s: c! F1 G - .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)- E. o8 T3 _5 I2 X4 ]" g x, d
- .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数): j0 \- M7 ]6 `0 g
- .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)
' G8 z2 P3 B G9 e - ;======================================================================0 b* s8 T& A3 I& l- W0 ?; W1 O
- .INCLUDE "fc_demo_config.asm" ;全局配置
7 ~! e2 i- f- [ K+ ]5 f! Q- d - .INCLUDE "fc_demo_constant.asm" ;NES常量' e5 m' R$ j1 H. u
- ;======================================================================
# V& S+ c3 \. w$ B v6 V+ d p - ;音乐配置. O; U7 `- e9 R( ^9 e$ V
- .IF 0 = MUSIC_THEME
1 }, G* A% D$ ` - .INCLUDE "data/music/Gremlin 2/config.asm"# U5 k8 o, c) R9 g
- .ENDIF; @* B; ~% Q) S: o
-
1 e9 N7 K8 S% t1 D$ ] - .IF 1 = MUSIC_THEME; J! i( d9 O. _, S9 b
- .INCLUDE "data/music/Raf World/config.asm"+ v2 o( Q( a1 ^
- .ENDIF
" Q8 K: n% A+ q! y: c0 ~& I0 r -
2 L& a; R( G! _8 G: i) L2 Z* v - .IF 2 = MUSIC_THEME 4 F* a- Q! g* ~0 d1 Y$ Y
- .INCLUDE "data/music/Ninja Gaiden 3/config.asm"
5 |% W% l+ g4 ^/ ~9 F0 x! \ - .ENDIF: a; n1 I; W$ @8 b
- + i) x$ E& Q0 p" z/ q9 x' f
- ;======================================================================* t% p* P T- ]- j& M7 G) b
- ;引用CHR图像数据
! X- t' a% ?4 M/ L5 G1 v - .BANK NES_16KB_PRG_SIZE * 2
( f E! R0 s! L9 J - .ORG $0000
0 S D+ R t# Z# ? - .INCBIN "data/bkg.chr" C. D; [9 [5 J+ U8 I) }7 q" q
- .INCBIN "data/sp.chr"
3 ^3 I! ]; F) M( u# L* M, } - + a4 w7 `3 P2 A4 m! V' o0 Y
- ;======================================================================& c: h9 ] z V: U- ?7 s4 E
- .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank! I# }6 I9 V7 r
- .ORG RESET_ADDR
3 ~' X/ o9 z$ ]; g! I$ q2 ~/ E - ;======================================================================2 V1 u, v' i/ n5 s5 m1 W# o+ |# O2 q1 _
- ;引用其他源文件8 r( l* a. X6 @9 j! `. J
- .INCLUDE "fc_demo_ppu.asm" ;PPU处理9 @2 k6 Y& {, @( t! Z4 s' O* w
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理! i- s0 @) R, @! {6 E
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理2 _2 m0 s# x# ? F) Y6 g0 K0 c
- ;======================================================================
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( w0 D9 q( o$ w2 e. b+ `3 `* V- ;======================================================================
. n$ |3 G8 u6 G O7 E - ;等待VBlank到来
; }5 O Q/ @& w - Wait_For_VBlank
# R0 g2 K* T3 K2 V* I) V - LDA PPU_STATUS H: x5 {, `, ?+ c% W8 U
- BPL Wait_For_VBlank
/ _4 A; o7 W1 R8 J% V' t- l - RTS) \( @8 ?# F x
- 5 U: J8 k$ D" \" @$ o
- ;======================================================================: ?7 V6 F, {$ p- O3 l
- ;调色板初始化
# P. X% {1 }- p- a - Palette_Init
( u4 k6 r9 A0 }7 J) v - LDA #$3F
5 j z0 G1 s( a+ ]5 j( Y% y - STA PPU_ADDRESS( v. O; ?) i4 M' a- a
- LDA #$00! H9 L" @6 [! z. O8 l% @8 t/ u$ Q
- STA PPU_ADDRESS
; d% _& y& ?% t - LDX #$00" H- C5 z" H H+ q" S# l
- LDY #$202 o9 x# ^2 J. }% P7 y
- .Write_Data
+ G) B9 F$ J3 M" D - LDA Palette_Data,X
' [7 ]+ H7 S" j1 F3 w - STA FC_PPU_Pal_Addr,X
/ u) n6 V! ^% i) G - INX% A" q/ Y2 ]5 q6 H
- DEY
8 G1 V- J$ j7 V - BNE .Write_Data( U& ?5 s6 T: s5 Z" X
- .End
* o' W8 B. l8 P$ W# z( J - RTS
' h: G- W; l6 A, \7 n- I9 H: T - : ~9 l. C: X: E8 p: \
- ;----------------------------------------
7 a0 f5 C# {5 f1 W- e+ M5 B - ;调色板数据4 l: b& D) K' r" X7 O9 G8 T
- Palette_Data0 v# h2 ~. j$ V7 J8 Q2 g4 t2 v- b
- .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B% {2 S6 w+ U" I: W- k- Y, P
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 228 s4 w4 L* ]3 I b: g2 S* s
-
1 z1 Q Q! y6 Z; l0 V4 Z - ;======================================================================
* R! s4 v/ x& p# U/ E4 Q - ;命名表清空
/ [1 G* p& J4 M2 p - Nametable_Clear/ Y& G- ?( e4 b* B
- LDA #$20
3 e+ T$ v* w3 Y9 H% m5 F, e - STA PPU_ADDRESS
' q6 ^/ \7 D B5 R - LDA #$00+ F2 d3 b% G# x. @
- STA PPU_ADDRESS1 Y7 _4 A/ o5 k1 t8 J+ `" [
- LDA #$00% K! W0 G# A: H% W. N1 }% T
- LDX #$00
8 ^4 H: _5 V5 s - LDY #$08
, g; _5 [& n0 }. X - .Write_Data
0 v6 a1 b' u4 s! y - STA PPU_DATA* L' q+ A0 \! s
- INX2 o% s& P6 g9 t- c* f' p" p
- BNE .Write_Data1 ^" N0 t+ a9 w0 U5 J1 D
- DEY
1 t+ U+ L* T" ?; S" p - BNE .Write_Data
5 p9 h+ x2 ^; H+ L* T3 \# B - .End. k% h9 s# {# ~/ b2 b! J8 d; d0 x
- RTS
4 ?; @2 u! x* C+ _- W
! ^. L5 @) P) Q1 `! f, ?- ;======================================================================
2 X6 d: z" E. U F# A' z - ;音乐曲目切换
! n6 O" Z+ ^; _9 `* Y+ V5 c - Music_Select_Process
) @; Z* o( L& t2 L: h/ ?- i
; l* i; B3 _2 Y. k# F$ M- q' Z- .Pre_Music;上一曲 }! D; O( L5 ^! r
- LDA FC_Gamepad_Once- v) i$ S2 r4 L7 c5 t; q! x4 N
- CMP #JOY_KEY_LEFT0 m4 F( T: X3 Q$ ^8 H0 R' r1 F4 D
- BNE .Next_Music. h. _& U# i# ~. ~
- JSR Music_Play_Pre
+ c' l! H- v6 k( ?: v8 T - .Next_Music;下一曲
, @( D2 U7 {0 V - LDA FC_Gamepad_Once
6 Z; P! f! k( o# d/ g! M - CMP #JOY_KEY_RIGHT
- U% }$ D8 R5 \& b: g; k4 F* v - BNE .Next_10_Music9 A V( ^7 `5 F3 \5 f H
- JSR Music_Play_Next
s) ~7 f/ ^# r3 T - .Next_10_Music;上10曲
0 a0 D: B, j5 K - LDA FC_Gamepad_Once1 Y1 @& c6 _1 ?9 v
- CMP #JOY_KEY_UP
4 o5 r& ~1 U4 e1 A, X9 `( u: C2 U - BNE .Pre_10_Music
3 e* m; M! I1 R7 V4 B" T0 e - JSR Music_Play_Next_10
9 e, u+ o1 s6 U1 [9 k1 l- q - .Pre_10_Music;下10曲7 `2 ]: f( M; O0 Q k
- LDA FC_Gamepad_Once2 j, w3 ]' b. B/ |2 z! x
- CMP #JOY_KEY_DOWN
4 V7 X" I7 c3 v7 d - BNE .Reset
3 f, ?( M0 i8 a; {, w: c0 H - JSR Music_Play_Pre_10
' J$ {. Q5 x2 |1 p0 Y/ V0 t0 s - .Reset;重播当前曲目
. h8 U& T3 {7 H - LDA FC_Gamepad_Once
4 y- {( J, ?) G0 v! r% N - CMP #JOY_KEY_START7 ~4 S0 ]2 o- m1 V4 M
- BNE .End
# Y1 P7 q3 }- l, t# Y# n! ? - LDA FC_Music_Index2 c0 L, ^& `9 S2 H/ w2 f
- JSR Music_Init_Process& g: w: b1 L+ K" c& o& W$ _
- .End
( o9 g% S7 {& Y5 L: Y: ^1 d - RTS
% U+ n! x% x; t/ ~4 O0 v+ f
( F, q1 o' U: F7 B8 G; P6 H% a- ;----------------------------------------------------------------------
9 f) M+ [; M+ V8 w$ f1 \ - ;播放上一曲. M4 P6 v5 K1 C4 _3 Q
- Music_Play_Pre
. Y! H& u' l5 [5 R# m - LDA FC_Music_Index: l) E9 K0 e& b5 S7 x8 a
- BEQ .End
0 J! D' f! X6 ^: b5 ~9 S7 D5 m - DEC FC_Music_Index
& a P: r# z8 S- J! s$ I - LDA FC_Music_Index
. k! o0 Z: F& ~* p1 Y* q( B9 ]4 a; U% } - JSR Music_Init_Process
0 ~0 E2 M- V; N, m J - .End
( U0 }: x) P# E5 t& Z - RTS
7 H, C8 X& B0 D8 H! v6 O - ;----------------------------------------------------------------------
7 h9 J- P2 p. |2 J+ Z* \. _+ Y - ;播放下一曲* `9 W+ t5 |7 l
- Music_Play_Next
) v8 k% ~3 e- l/ z" S - LDA FC_Music_Index
+ n. e8 ~7 ?: z, p - CMP FC_Music_Max_Index
0 R( q. F' ^; n n1 q - BCS .End$ Y% A$ A5 ?5 o+ A
- INC FC_Music_Index: w& Q5 a( G$ m( M) c5 F9 P2 @8 d l9 B
- LDA FC_Music_Index3 s* N6 L' f x, x/ V# `: N
- JSR Music_Init_Process" f& }1 m- x. d% ^2 K
- .End
d7 ]8 h+ e! ] - RTS) k/ Z" U- s8 o. i' H% U/ Z
+ x6 |* b, J+ w! Y0 e, n$ |- ;----------------------------------------------------------------------
+ Y! @2 K, _! s5 ?& L; c - ;播放上10曲! ?. C, r, }; k) e! s7 a2 ]
- Music_Play_Pre_10( w3 b# q# X2 z" a& F
- LDA FC_Music_Index' S9 }) w1 x/ e" H* S n
- BEQ .End3 p3 V# b2 ]; `) a6 ?
- SEC. Q3 E6 ?+ ~: F- T! c
- SBC #101 B7 G( C& g ^4 B$ |+ v; K, k
- BCS .Pre_10" T& ^ L! l6 W5 [3 I2 ]0 A! b0 F
- LDA #$00
, E2 m( m% Z/ Y1 Y( H% N' a - .Pre_10- R( c" }" C/ }( i
- STA FC_Music_Index' k+ V9 C0 s2 G7 h+ ^9 N3 F
- JSR Music_Init_Process
) R/ ^; g6 s: h8 x - .End
4 t1 [6 k& @# ~+ j: ?3 G - RTS
* v$ r; {! h2 v, V/ a+ i* F+ { - ;----------------------------------------------------------------------
9 l' X0 {9 ~$ M y# B" J, p - ;播放下10曲% k9 s+ N$ Y8 a6 W* G5 |
- Music_Play_Next_10
9 j/ {( R5 q* ~ - LDA FC_Music_Index
) x9 B& b7 v$ v; r6 y% v N - CMP FC_Music_Max_Index
# v4 R8 }0 y5 f' e% }# t" C0 ] - BCS .End
5 `6 T# k8 S$ x& u1 f% B1 V: Z' I - CLC0 j2 S+ R! [; a# ~
- ADC #101 s* D1 m& a; U8 y7 I4 f& k- ]: w& R
- CMP FC_Music_Max_Index
3 Q& j0 e4 a7 s$ D! @4 k% b/ ~8 c - BCC .Next_10/ V/ Q3 v/ d7 R# Q8 g7 i+ @5 x4 u
- LDA FC_Music_Max_Index( W5 }6 T4 { r+ j* ^/ S, q
- .Next_10
( u( M1 h* w3 ^% u& h0 ] - STA FC_Music_Index
3 S. N6 }7 k3 C - JSR Music_Init_Process R" l, l; `5 w$ Z: ]% [5 Y
- .End0 ]* S4 t1 w& @ F
- RTS
; _7 E4 D9 ]+ b2 j& z) }
3 K1 R% P1 k$ V7 v3 }- ;----------------------------------------------------------------------
. ~, W* t5 y8 r; ^ - ;8位十六进制转3位十进制制
v* @' p. K% h - Hex8ToDec
* G8 n/ ]6 R4 I W - STA FC_Dec_Data_1' {' h N; V) S6 }3 m9 k
- LDA #$00$ N- E8 d; C2 W! n6 ^7 T1 j
- STA FC_Dec_Data_100
& |. E+ h8 f7 N - STA FC_Dec_Data_10
E: f) a) }# Z3 m+ {: z; u - LDA FC_Dec_Data_1
3 Z' [1 Y5 w$ N5 O6 ^ - .Convert_100- u h! W, @7 e
- CMP #100
" @' W' V6 |! O) d - BCC .Convert_101 v* V) Y+ S. x& T. n
- SEC( \# w+ { c* U2 R) v: t
- SBC #100
[; W4 Y! C/ g$ p! X4 c. F1 U { - INC FC_Dec_Data_100. d4 ^" ]8 R: R
- BNE .Convert_100
* D) @% I& ^- X5 }3 E - .Convert_10
" R4 s3 X7 [) c$ d; p. o- u: j - CMP #10' I7 T4 m7 ?4 K& D5 V
- BCC .End- q" \1 F; b+ x
- SEC; Z. y0 q# Z" b" W @+ z* r4 l
- SBC #10( h. p1 B# E U( H; w
- INC FC_Dec_Data_10
6 a- W z" j' S r7 v - BNE .Convert_10
1 Y' _* z/ k b+ Q' D p - .End9 [& U( j0 h4 T% U9 M! a
- STA FC_Dec_Data_1 v* [& T0 Z( f; ^. A" g& z
- RTS7 L5 x" T% ~# u9 o7 R7 ]( ?
; p; x2 a/ C C/ x0 A- ;----------------------------------------------------------------------( G' U9 ~# y( X6 }$ y1 N W
- ;显示曲目信息' l: t, b/ V3 N8 G% J0 ?6 A- H
- Music_Info_Display
) u: }7 s+ n# t! s, @9 n2 U8 h - LDX FC_PPU_Buf_Count z' k* [! h, x
- LDA #PPU_WRITE_MODE_CNT_LINE8 C3 X: O6 k) e0 W0 h$ ^
- STA Use_PPU_Buffer,X
' T: j1 ]9 x* e - INX
# W7 G5 m, L; _7 R' c$ e3 v! a -
! u ]( G4 m' m9 l3 v - LDA #>MUSIC_INFO_POS% L) P7 y/ I- v- b9 S
- STA Use_PPU_Buffer,X" [9 ~4 V5 l) [. ?" B& L- w
- INX8 e! s I' e' I1 M" L3 k6 x
-
# _3 u& b6 X. d O - ;居中+ X5 \. P9 `9 f: h8 ?
- LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
, P8 G$ d) F N! C% ~ - STA Use_PPU_Buffer,X
! U- _. h( ~* v8 v' V - INX
, [6 Y( @9 M' t( y- y -
3 d* Z/ o) a' n7 T( A! G$ ]3 I- } - LDA #$05
: E' @6 S. ?1 R- h, o' Q, q" {! } - STA Use_PPU_Buffer,X
+ }; J4 F' |' U+ c - INX$ N: e2 M/ f9 D+ I
-
" Z+ ~6 [6 v& y: M5 W1 Z5 x7 S - LDA FC_Music_Index4 w! {/ M3 K. \' Q" S; ]
- CLC) u$ P: `5 z, M! K5 w
- ADC #$014 _% m, L, J. r, e1 \
- JSR Hex8ToDec
# i7 x2 A. |, ]- ~* W5 ]0 J+ L4 ? -
* ? U2 a l! o$ E$ R - LDA FC_Dec_Data_10& L; z& ?; } c6 o4 K& m
- CLC1 J% f7 f4 X2 e; O
- ADC #'0'3 C1 K4 ?, c& p6 e! r: w: W8 I2 T
- STA Use_PPU_Buffer,X
) w* M% `) M8 V; X2 r% ^ - INX0 t. n& C/ K: R+ C. q
-
5 \2 J5 b2 k( d4 v$ z - LDA FC_Dec_Data_1
0 h# Q2 c5 _5 a! G7 d) Y( V - CLC
/ f* _9 O1 R; ` r! G - ADC #'0'2 n( {) m8 r: B1 i
- STA Use_PPU_Buffer,X
! q4 B, Y& R2 ]% p+ b( n9 u) D - INX
+ y/ B U9 @0 i5 o2 v - : S0 Q( V% p% X
- LDA #'/'
7 C( r: C f1 _3 t" b- o - STA Use_PPU_Buffer,X6 M( f* z ~: {* D% t
- INX) ^% y# n+ n ~4 B0 @
-
$ U+ d$ ]) K( e* W+ z1 v. G7 R# {8 ? - LDA FC_Music_Max_Index
7 t: C- f8 E$ I$ {* y- g2 i7 Q8 N - CLC
M& Y! B1 y% V" Z7 S' ~9 y - ADC #$01
J! `, I$ K u+ E5 Z$ s5 J - JSR Hex8ToDec
( q4 e8 I- q2 h# ~ - & g& r2 F: G' Q) O3 t* U' y. ?
- LDA FC_Dec_Data_109 w5 N& d1 i4 M6 m1 Z4 n7 f: p
- CLC
* T4 Y2 E. i; S1 A- g. Z - ADC #'0'! m5 r( ^4 M4 Z1 I$ P
- STA Use_PPU_Buffer,X
; {' T. c0 ?5 u) A- N2 S - INX
- J' p, M7 ^- F) _8 q( ^ - " P3 J0 P% \- t& O! B# P
- LDA FC_Dec_Data_12 _- p4 a% Z/ }6 C' M& E$ b
- CLC. c2 [0 M, u: E" r2 v& h$ H5 |
- ADC #'0'& f" ~" P" `9 L: l
- STA Use_PPU_Buffer,X/ M: C0 Q2 U2 r0 |; a O" M
- INX
" [ E* w% D7 n; V# P! D$ h -
7 v" Q2 q6 a" r1 A - .End
, p$ p& D, m' c5 n - STX FC_PPU_Buf_Count
- f% N q. u4 B4 o$ L* b - RTS
3 s- c, c" ?/ Z/ i- P% N# ]4 v! q - ( l. w5 C; q) ^9 n$ e- @0 S
- ;----------------------------------------------------------------------* \* O# U. }3 a# K4 x1 _. q( l. v
- ;音乐曲目初始化处理
( T% Z4 \% ~2 Z - Music_Init_Process
5 H$ l2 y( F9 v5 ^) G9 t/ p( T - PHA- |2 w! `( t# [4 ^ q, j
- JSR Music_Clear_Process
, K) _3 q, @7 z2 H9 t! y' L _7 h: [ - LDA #$1F o& x5 M; c2 Z1 `, v
- STA $4015. m, f5 I4 Z! s) n1 A- C* k
- PLA
% K; C3 ]% ^$ T) F7 a$ g# P" p1 j5 j - JSR Music_Init_Addr
+ j( A% h* b! W: `4 Y - JSR Music_Info_Display
2 Y, n" f) \* k* X6 S& |3 E! ~3 l4 w - RTS( `' d1 b a3 O3 X8 b6 ]
) B1 }$ U4 y. X0 f2 F; M# w! t$ h0 \- ;----------------------------------------------------------------------' t3 H, W) G3 j' x/ d; x8 W
- ;音乐播放处理/ m# q3 n- f4 J
- Music_Play_Process
1 K. B0 z$ O7 N" ^. D J9 V/ o - JSR Music_Play_Addr8 j4 t' b! H# ^+ e4 [" }
- RTS& i/ Q' r& u9 j* [& ]
- $ G5 _/ s: g& h- h
- ;----------------------------------------------------------------------7 L0 |9 H( f6 x; y) C3 S. O; ~$ ?
- ;音乐播放处理
( H; @$ i1 A/ C - Music_Clear_Process
X/ t. H6 H) b3 L+ h* }/ Q - .IF Music_Clear_Addr: @0 {7 T4 d! S% G" J6 o
- JSR Music_Clear_Addr9 k) l( Z9 H5 r% q
- RTS" D* I2 [5 ?# @
- .ELSE
: u- D/ U0 x2 ]4 P8 F4 i - LDA #$1F* r. G$ v6 H5 [5 K) ^
- STA $40154 d' Z* H/ R+ J: Q( Q
- LDA #$00
' g2 N1 b* G0 Z& f - STA $4010' ~3 z7 o% N8 K- b3 \* F4 x
- LDX #$00' x D; s5 I7 V" s
- LDA #$00
- q7 m+ s3 c$ m i ] - / _+ z( P- _% J: h& K6 q
- .Music_Clear_Zreo_Page_0
. u: [' T4 P/ v - STA $00,X
; i# k! c. R9 ~% g& k5 M - INX/ O0 V7 H# m, `0 n. j' w% O
- CPX #Use_Zero_Page_Begin
. @+ ?: G) h2 x% L( E - BCC .Music_Clear_Zreo_Page_0
- ~: q3 k- l6 P2 [3 {1 y3 l2 O - # f2 `3 x) p3 i( g! s4 a# j
- LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size8 q- |5 {4 W5 R% a! U1 f9 m/ _
- .Music_Clear_Zreo_Page_1
. W0 \9 D9 ^0 c" j2 ^/ u+ R( t - STA $00,X' t. T. v' J3 G; ?$ h4 ^
- INX/ V2 ?* ?6 E! e+ [, D2 y
- BNE .Music_Clear_Zreo_Page_1
6 n5 D* @" b8 g0 c* x -
% W8 s/ e$ Y" W2 Q$ l - Music_Clear_Process_1! s0 B2 I5 \( p) T- r: I+ r
- STA $0600,X1 D0 u7 u0 Y- Y$ P
- STA $0700,X
, s/ Q; [; r3 t2 G' o4 }& W - INX5 N" o( l$ o/ J% |6 M
- BNE Music_Clear_Process_1) A5 d: h& t0 R% n. ]1 Q w; L- E
- LDA #$105 N: _) n' d; y5 \( E
- STA $4000
0 L0 s& K* J- D: a9 ]2 z4 L - STA $4004
" u0 K5 C4 F; j- a6 A: _4 O - STA $400C
3 y3 i# ^# j, Y* R. U l6 t - LDA #$00
8 i; C+ H7 j/ r$ @* c - STA $4008! e5 I. ^( U D+ A3 r
- LDA #$0F* q$ ^9 s( N- W3 ^
- STA $4015/ j7 d1 A& G. D8 a+ }$ S" d; B+ L
- .ENDIF
5 v1 D2 {) i! h4 Z9 C. M - 7 _6 a: O" A0 J5 J
- RTS" O5 T7 J( t7 V8 k" @% z
- + i0 P7 m. }- n5 O ?) O7 S
- ;======================================================================
- A8 ?- c; ~ H( z: g2 A) K - ;重启处理3 j4 j; b0 i0 S/ C: L
- Reset_Program
+ i2 w# S/ v, g - SEI
2 f% i. v3 I% Q& D# C- }* S4 H1 ~* U - CLD
" t6 e) f5 s/ K' G5 P# I - LDA #$006 u$ n5 o9 F8 `: j9 d1 V
- STA PPU_CTRL
+ U3 g$ }9 U: K' |# s% X, I& l5 ~ - STA PPU_MASK% x* d6 `% V' ~ ?& u* }0 q9 @: D
- STA JOY2_FRAME( L" n/ B8 R' o, s; e+ c, _9 T
- STA APU_STATUS
7 }3 x- d# F/ i% H6 L -
/ @9 l& h/ f# i/ m - ;等待屏幕准备完毕5 N5 z! v( A& F; d& |
- LDX #$02
0 D8 H+ _* Z( y3 j - .Wait_For_Screen_Ready
4 t' d' e9 o8 G4 V& F6 @ - LDA PPU_STATUS
% y. N+ u$ z+ { - BPL .Wait_For_Screen_Ready4 |6 F% B- x& t8 a1 U7 d
- DEX$ c: r! G8 c3 z9 q6 ^
- BNE .Wait_For_Screen_Ready k9 _" [1 [5 r: b% k
- 5 a4 {7 Q( g! Y$ v
- ;清空调色板- O* \" p+ T! _5 ~( ]- R V0 P
- Palette_Clear
% f' {; d4 R, u$ M" \ - LDA #$3F* l9 S6 @! {1 M+ O* U. V
- STA PPU_ADDRESS
$ [( c6 _/ ~% i9 m - LDA #$00
/ j4 k8 O% A7 ~# d6 o Y. {! m1 |% Y9 A8 L - STA PPU_ADDRESS( E- E/ L6 T& G" ?7 j7 o
- LDX #$209 Z b& M) M$ h( ^
- LDA #$0F
3 H0 d- ^. q0 {: i0 k: T7 W - .Write_Data. u0 l2 m; ]" ~- R- _* q
- STA PPU_DATA. o) k* d/ b ~( G
- DEX2 Y8 K7 ]1 O' s; d+ b/ y
- BNE .Write_Data
: Y1 R1 C* P, b" l! Q - ) t/ ?$ q8 u( k* n2 R4 D3 z: d
- ;清除声音 $4000-4013
* B1 X7 p& ]/ i - LDY #$14
- O; {2 S$ |- Z8 M - LDX #$00
4 R x3 d7 ~, W0 U5 F ?7 O - .Sound_Clear
$ P8 Y/ K" R( J - STA $4000,X
) S$ e L. H( G" b - INX
m; @! o/ o9 s3 V - DEY7 E7 t3 {/ C. C0 h- T8 @$ J
- BNE .Sound_Clear/ w* `) k7 J9 j7 Y: r
-
. m+ [4 Y4 X* m3 `1 S - ;清除 RAM $0000-07FF
$ H1 q8 E O& G8 m: [. T7 s - LDA #$00
/ b# Y% j. M+ e4 n6 m1 \$ p - STA $00
2 `# B/ U, q; f/ Q/ o - STA $01
6 n) u% R) S4 h; l8 ?* B - TAY
" j* J D i3 H - LDX #$08: P. V4 |- a7 L% Z
- .Memory_Clear
5 d+ x5 e7 H; Y5 r - STA [$00],Y+ G% `! Q3 Q* w. ^* H& `
- INY
! q! h4 I o) Y6 ^6 h. [, ~5 C* c - BNE .Memory_Clear
; W, A& w% n* z$ T* r - INC $01) d: P& e4 n7 V( r, p
- DEX
( V# z5 k3 X% S8 b" a3 T D - BNE .Memory_Clear
" @9 I7 t+ F" J9 K/ W - ) h- x4 i0 I. u$ n) _3 p
- ;精灵缓冲初始化
+ o( Q, E5 b" t9 K1 F% m4 O - LDX #$00
Q5 G2 U6 x. N6 J" N - LDA #$F8
. y- |) {) ~ ~ |( j2 j - .OAM_Clear& a" I! {3 g: B/ b* y, j+ k6 D
- STA OAM_DMA_Buffer,X6 ]3 ]. p t: E) p/ L# U% M
- INX
; u! B9 u( H: |6 U' M3 U - BNE .OAM_Clear
$ F, @% r. [ W! o4 G4 r - 5 a: S8 }: K5 s' y2 X
- ;栈指针初始化/ V$ e+ ]8 q6 [' \1 W8 }( u
- LDX #$FF
9 b; `0 Z7 E6 _, n- ~ - TXS& U4 ^7 @* g$ g4 X+ L) N9 ?) ` r
-
1 d, i7 e" N3 c) P4 i - JSR Nametable_Clear;命名表清空
; `- s ^: G( ]( h' ] - JSR Palette_Init;初始化调色板缓冲0 u! G5 I7 E l
- JSR Static_Text_Init;初始化静态文本
8 ~# l4 D$ E0 T0 T x# L1 O! J/ P -
; {- {3 _: y$ R - LDA #MUSIC_ITEM_TOTAL - 1
+ ?, L& m) \3 ~# W1 Y2 Q+ r) D - STA FC_Music_Max_Index: T7 M y+ X8 p$ h
- ; Q0 P3 w" a' Y' X. F
- LDA #$1F
& g+ d( L- C0 j - STA APU_STATUS
" t/ b& I2 D$ Y - LDA #MUSIC_BGM - 1. K9 ^0 D4 g6 G3 X) h/ e
- STA FC_Music_Index
8 f5 ]; h0 y% b N8 V - JSR Music_Init_Process;音乐播放$ q3 f3 q6 ^/ D# M9 x
-
# \$ B5 S4 V! D1 D* C6 L - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)
7 L4 N4 U5 j4 x - LDA #$1E/ [" d1 o$ |, h; t
- STA FC_PPU_Mask_Buf
* z- n8 V9 v8 l* g+ Z2 i -
6 p, F( M5 C$ r- _' X, T6 z - ;启用NMI处理; T& B) S6 ?* g3 z
- LDA #$80
9 `! E F& F5 D - STA PPU_CTRL
/ F3 {* h9 Q3 b6 v! z; x, v7 {$ l2 ] - 8 C$ [% b$ }3 D" P& y! |
- ;程序循环, 剩余工作交给 NMI 中断处理 R9 m5 b3 T/ C/ P6 z9 |
- .Loop
/ R7 D4 B7 n8 m6 ]1 ?+ l - JMP .Loop6 b" g& e" }4 r$ z* u V! {" a
1 g- V3 \: |5 b1 k! p! W1 X- ;======================================================================
: z c4 Y% j/ Q' e6 Y: _ - ;不可屏蔽中断处理
, ^+ J5 S( r% {4 ^0 O/ s7 G/ G; \ - Nmi_Program
0 O! L9 {9 H6 L% K9 Q! O+ }; V" F - PHA u4 o1 u( j! }1 h
- TXA; N9 S7 R1 \. d8 v: z
- PHA
4 M' t, @! ] L/ r7 u% [6 E& I% B - TYA/ K7 C* y* p3 p$ |4 p7 m
- PHA9 \; m! h4 a) d" P
-
* u5 N& E; u3 h3 f: o - LDA PPU_STATUS;读取使得 PPU状态寄存器复位
, h- i4 e* D7 ]0 p& v - % F5 \8 c @) u0 ^" u% ~. K% V
- JSR FC_PPU_Procrss;PPU处理/ Q% p% P* ^2 Q! }
- 6 [' g8 Q+ O4 T9 A/ x/ W; W6 [
- ;精灵内存更新* a! A f) `# {+ B) Q& ~
- LDA #$00( ]* f, {3 e1 L" d4 s; `
- STA PPU_OAM_ADDR
. S7 r' K: t+ ?' U a. g- S, i! j - LDA #OAM_DMA_Buffer / $0100+ C y4 o! q1 P2 n+ d. {. y
- STA OAM_DMA. Z+ w7 w: J. o% h* y
- 7 |8 N8 e2 @; B+ d- Q
- JSR FC_Gamepad_Process;手柄输入处理0 E! w" `3 w' n
- JSR Music_Select_Process;音乐选曲处理% ]* Y- M8 g) u& F6 G
- JSR Music_Play_Process;音乐播放处理2 N, b( W+ B" w l1 P3 p
- 1 c( t6 h( j9 m: e u3 I j" n
- PLA7 ~' j! i K, @/ R3 |* e
- TAY6 p/ n' \ f1 B: O
- PLA2 _& _. C+ p0 I0 {" f, s+ u9 y$ f
- TAX; Z+ w, v& Q) C# |
- PLA
+ R2 B0 @# f- o
/ w- D/ ^; ]# v: u/ ^" A- RTI
5 c- w0 b7 f. t. I! e - " x9 R* T2 Q v; g' F3 m
- ;======================================================================
0 W1 ~) I5 t1 c. A; q - ;请求中断处理
& [1 Z0 ~/ f$ D) k - Irq_Program$ T( }. ]4 I# l. S/ M S( X
- RTI
. ^! ]4 F; e% b7 Q - 9 T0 l$ e K* M' S8 {
- ;======================================================================( h* E; d$ n. r E) S7 S, G% R9 j
- ;中断向量表; K( O3 J* x) W) T$ z5 A
- .ORG $FFFA& B8 T" Q+ u1 z: ]
- .DW Nmi_Program ;NMI触发时执行
- E: F2 x# G/ D1 _ - .DW Reset_Program ;载入ROM时最先执行
) n$ h# z# |# z. W" H; F. o - .DW Irq_Program ;IRQ触发时执行
" J7 {" }7 I& }3 Z9 i' m
复制代码 + M, h' G/ c9 g/ n- i, ~
; J1 N! {3 S/ t7 o
2 v$ N( S% T; a6 f9 q7 K( j t
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