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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下4 q; c- | R9 j
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以下是主框架代码:
. C6 U! f5 N6 v8 H9 @4 i- ;======================================================================& e% L0 V) R% m$ f( [) [( ]- q
- ;文件头
. U5 q6 }/ q2 |* C4 [# o/ A8 Y: } - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量& o9 _% y; R7 y% p, i( r% X9 p
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量
% o# V; Q/ q) o* x6 ~: z( J; O8 m; u - BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码$ j3 y$ k1 T( z: o6 {7 @
- ;======================================================================) }/ B7 a9 @( @4 E
- PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2
( [2 T8 v: Y7 K- \" B - PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1
6 E1 G# ?& d6 y, z7 c# J - ;======================================================================+ E1 X3 b- b. r7 I) D) a
- RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
( q4 C& [; S7 D+ z% y$ F; i* P0 z - RESET_ADDR = $E000 ;主程序起始地址$ a# d# q) X3 W1 y2 Q9 k9 Q
- ;======================================================================, `7 X% I6 S' D7 x
- .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB& n+ g4 j7 e* l) [, V
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB. F. V2 I0 T- |3 `% B
- .INESMAP 4 ;Mapper号 (0-4095)
7 }6 A$ q. H, M; O: n( C - .INESSUBMAP 0 ;子Mapper号 (0-15)
/ N1 @; G2 W/ s2 J ^ - .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)6 |9 }% q. n8 I5 ^9 e
- .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)
7 r* k9 Z9 e+ w3 O9 K - .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)
; Q7 F# r3 E Y, K - .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数). b& Z& A& v" D) q3 l& Z6 _
- .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)! H# l3 H X2 E4 ~9 T6 |6 H
- .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)3 O" q/ H8 \) C4 R
- .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)! R% [1 N3 M* Z e2 u% g5 ^$ D# z3 }
- ;======================================================================
7 B& l1 k# W4 ?" v7 Z! u9 j - .INCLUDE "fc_demo_config.asm" ;全局配置
6 q2 s+ U7 Z" Y, M1 T8 ~ - .INCLUDE "fc_demo_constant.asm" ;NES常量
$ L" |. L! X/ c8 ^: b - ;======================================================================4 {4 E4 V2 a: q. E# b6 P5 D$ j
- ;音乐配置! ^" h; ^4 X7 j8 K) s: z9 t$ \# |
- .IF 0 = MUSIC_THEME # Q. ~5 O3 k& h5 O9 \7 g4 I
- .INCLUDE "data/music/Gremlin 2/config.asm"
# ~, U o+ h' W# S f* L - .ENDIF7 m/ R9 ~2 y+ I
-
# O' i) @' ^: k, a" W+ x - .IF 1 = MUSIC_THEME
3 S9 p& P w; M: b/ R - .INCLUDE "data/music/Raf World/config.asm"
' C M7 y( I, ] - .ENDIF
- |& ^+ l4 K6 L( Z: ~7 Z -
( A" @ l- C7 m - .IF 2 = MUSIC_THEME
8 B6 B6 h& O }- d8 _ - .INCLUDE "data/music/Ninja Gaiden 3/config.asm"
! L9 Q' Z' T6 Q+ a1 @ - .ENDIF' f5 l+ f9 j3 R( G1 }1 O
- . u) ?( f/ j; d. Q$ c
- ;======================================================================
; d$ M+ n/ {, a' ] - ;引用CHR图像数据
0 n. N, T7 [$ o - .BANK NES_16KB_PRG_SIZE * 2* E- S( C4 B: [7 l4 C" p" Y: t- F
- .ORG $0000
( w: x6 V. W) F* k/ D- u' w; Q$ g - .INCBIN "data/bkg.chr"
" J* ?0 y3 v' | - .INCBIN "data/sp.chr"
# S# i3 u$ l' Z. e( o6 o - 0 V1 t' {0 {, W3 Y& `" J D' E
- ;======================================================================
. \9 Q3 L+ b& \ v4 s - .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank
8 C8 v; r/ m7 t, t) P - .ORG RESET_ADDR
# `4 g$ ]" ?, l - ;======================================================================& t* @) M+ q8 h9 d
- ;引用其他源文件
K1 i# | J$ N/ ~ - .INCLUDE "fc_demo_ppu.asm" ;PPU处理$ j& j6 d1 C9 \( K z
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理( H/ ], t1 J+ y! ]
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理8 ]( {3 \$ L# c' |: j
- ;======================================================================. i! ]& j' T- r4 C6 v, P3 w% [4 X
" c* H6 r. M: B" u* A5 ?" u- ;======================================================================8 R, d7 J* z2 ]& G5 R: @9 [$ ^
- ;等待VBlank到来6 p6 O- z0 D- T8 ]- |
- Wait_For_VBlank# N6 Z' e$ U0 M& P# s# p9 {& p9 U4 C
- LDA PPU_STATUS
; }4 W; D4 G" G# L- l: ^ ?2 X - BPL Wait_For_VBlank5 }& p, Y" _, D- ~: e
- RTS
5 J- S8 t& P7 ~0 y) r
$ m- `5 }6 ~. R6 P5 [- ;======================================================================
% X9 e* \- `; W! ` - ;调色板初始化
) h! D! f+ v+ U% U6 ?; l) B* l! d# v - Palette_Init
! {- z- a5 X! X# ?1 ]; z+ _; h2 V - LDA #$3F/ P& w, T" g$ T$ C: }# @
- STA PPU_ADDRESS
+ T! q i1 \8 |: H8 l) B) K& \ - LDA #$002 I, Z8 B6 e: U/ g
- STA PPU_ADDRESS
$ C2 Q/ M4 y2 h) K5 C! c3 j" ] - LDX #$00( v; \$ ], s4 X- [# O9 s: K( S5 z& |1 Z+ N
- LDY #$20: @, c/ E/ L4 {, @
- .Write_Data# ^. a# F: Z7 F5 M9 h o6 N9 s
- LDA Palette_Data,X
: @+ ]6 G% y0 n- w1 v - STA FC_PPU_Pal_Addr,X" C- o7 Q! k: y
- INX
2 }; p* H+ \$ Y - DEY( Y: D u" `0 W* y2 r6 c
- BNE .Write_Data
: ~( k7 n, g) M9 D* k8 ~ - .End
# W3 D$ u4 F0 A - RTS
. |1 z7 c9 A+ x- b; W - * x4 U9 X8 N) F1 s
- ;----------------------------------------
5 m# K$ f$ p# W2 r" K+ e# h$ j6 ? - ;调色板数据/ j2 y1 ^) R* F. X
- Palette_Data
2 Z4 L1 O3 i) Q; a - .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B
+ ^) F. F* K) i! w9 E - .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22
( \5 n) ^& k/ N9 O9 Q* m -
. h& \6 U* g$ w/ ? - ;======================================================================3 y1 S8 L* o7 q2 s5 F. D
- ;命名表清空
" L0 v; }) x j5 h - Nametable_Clear# r% W. w# T) i3 G+ J- |' R% ?# f, p
- LDA #$20
! \; v& p* i6 d& h' w - STA PPU_ADDRESS
+ ]. Q/ ?% v3 _, N8 q1 q. X - LDA #$00
/ _% z& V! T3 G! F9 |, Q; t% G - STA PPU_ADDRESS
/ T+ z0 e, D6 J4 L1 j0 N [ - LDA #$004 H2 a6 P$ |& X8 _
- LDX #$00
& Z' F! O( E1 B) X0 [) a - LDY #$08
4 \. E% `# J, I4 O - .Write_Data
' P0 F0 l8 j4 b! S- {! G3 t; x - STA PPU_DATA' l2 F2 \" ^; c$ K8 W) u/ X" c
- INX3 M0 b0 v& d" c: m
- BNE .Write_Data8 v5 R! V( U" U9 i' u1 ]$ X
- DEY* P+ H& j6 w) `' l
- BNE .Write_Data- G1 H$ _- k3 c% {( u l
- .End
# Z8 d8 g' t0 H5 }6 e) h( u - RTS
+ g4 {5 ~$ a% q$ S4 e, z
! _" c8 Y; r+ V, K- ;======================================================================1 O! D; ?8 K/ y
- ;音乐曲目切换# \3 {+ s4 V) t3 d) [% P
- Music_Select_Process
5 e8 [ K8 g& O7 m6 O5 I8 { - 7 m) E2 j1 L3 \) Y8 U$ \% \1 F
- .Pre_Music;上一曲- V; f% x( p% r6 R
- LDA FC_Gamepad_Once5 ?5 z3 D5 g3 U: [
- CMP #JOY_KEY_LEFT
0 M0 i: A) w" k8 S/ g% G! G - BNE .Next_Music
2 p& m( E7 A1 q8 M4 F - JSR Music_Play_Pre9 e3 a- r% \; K. c
- .Next_Music;下一曲
" n8 D+ Z2 M, W, N1 S4 { _ - LDA FC_Gamepad_Once4 c# m: ~. [9 J1 |0 D0 z
- CMP #JOY_KEY_RIGHT
8 ?( N; r0 L0 J4 n) w; u0 r - BNE .Next_10_Music
, l/ y; _) A# G" C8 f - JSR Music_Play_Next; Z, h' ]8 v+ n3 R& W% b
- .Next_10_Music;上10曲
0 @) \& f& H( K9 k - LDA FC_Gamepad_Once8 } {) k3 s9 {
- CMP #JOY_KEY_UP
/ R1 P( q/ z- L - BNE .Pre_10_Music
. ]& s: ~( d( L: `8 A5 a# O$ p - JSR Music_Play_Next_10
* V8 L& e/ V6 W6 D% \5 n - .Pre_10_Music;下10曲: |- |% B4 A- [6 s
- LDA FC_Gamepad_Once
4 h& }, V$ f- x) [ - CMP #JOY_KEY_DOWN$ F. [! l* X$ R& x9 r, [6 P
- BNE .Reset% g) O) P K& B6 `! v7 ~8 W" N8 d
- JSR Music_Play_Pre_10
+ i8 S1 t) D, d" P( P; t4 e# N - .Reset;重播当前曲目
) l. \0 \# l' N- c) j - LDA FC_Gamepad_Once- N# D. `# I* B n# }; m
- CMP #JOY_KEY_START
. y3 u2 C' r7 o5 Y. k5 @4 D4 j" P0 j - BNE .End- ]: F7 L: k4 [7 y+ \' @& E
- LDA FC_Music_Index$ F- T- _9 Z2 {
- JSR Music_Init_Process) G. k/ X# \3 Q& L* h
- .End
: G4 a9 b: W( M' E - RTS$ s! J/ z2 v: R3 K. Q. x3 G
- / T2 W- g3 j( O
- ;----------------------------------------------------------------------6 j y+ a/ T4 R% D j! H- i3 P/ N, |
- ;播放上一曲8 y: o6 u! E& p+ j: E
- Music_Play_Pre$ F1 h7 m. O/ \/ n8 ^
- LDA FC_Music_Index
# u3 O4 Q. L/ [" q6 ] - BEQ .End
2 t0 E% F! @6 I( Y - DEC FC_Music_Index( h2 S2 R$ `# y( V9 m
- LDA FC_Music_Index
) M# ]. A- X, i - JSR Music_Init_Process/ I o! V+ i* T3 q
- .End
. Q/ k, b9 l4 S* K2 P - RTS
& V# |5 Y; U6 y6 W3 _ - ;----------------------------------------------------------------------, f- }( \5 C5 J
- ;播放下一曲& H0 M% i4 k9 e% A
- Music_Play_Next1 i9 ~. [% V4 ]# w6 Z9 O+ p# o9 P
- LDA FC_Music_Index
( a8 A! i% E; Z3 i* Z - CMP FC_Music_Max_Index
( D; ^. B; F* o9 v - BCS .End) r$ H6 \. i# C* S( x/ n
- INC FC_Music_Index; Z M; f/ X" T8 y- C
- LDA FC_Music_Index# W1 O2 M! A# A- y
- JSR Music_Init_Process
4 j4 l9 }9 H1 j3 R; \, a - .End
. z$ i# g, s, K - RTS
, }2 _ ~5 U7 }& Q. n& v - ) j1 t7 V5 c( R$ q) i
- ;----------------------------------------------------------------------* b2 F0 ^8 u/ g3 ^
- ;播放上10曲7 u" z% B _- E2 {% k; z; Y# y
- Music_Play_Pre_10) v1 {+ G) U0 S1 @9 n0 T
- LDA FC_Music_Index
* Y9 R1 ?- d" r" f - BEQ .End
& a2 A# G( h& x - SEC9 N$ P. ?' z" P$ H7 x
- SBC #10* h: p9 `0 L7 Z
- BCS .Pre_102 E% m, N. L& ]$ _ q. l' _
- LDA #$00& ]8 y& t+ x$ F
- .Pre_107 O, X5 m1 ~! }1 z$ _5 T1 h1 Z8 R
- STA FC_Music_Index
* E* Q5 C/ s/ a# P - JSR Music_Init_Process' `$ T3 F4 M+ O6 e
- .End) i% }1 a1 C3 z P- p! G# U" e
- RTS8 Z- [1 I2 F+ Y6 q
- ;----------------------------------------------------------------------$ `$ z- s8 v3 R" O
- ;播放下10曲
! i+ ^6 \( Y. k' T: p - Music_Play_Next_104 v3 w* R4 T" `+ x P3 G4 d( L
- LDA FC_Music_Index# M! ~2 A9 ~1 G* }0 ]& X2 ^4 R
- CMP FC_Music_Max_Index
) P4 ~! u1 x9 a - BCS .End9 J8 K6 o7 j( q" v
- CLC
8 P' K% I& h ], M# J7 H - ADC #10: y% h1 ]0 Z* j$ b% d
- CMP FC_Music_Max_Index
* B- c0 K: D+ O$ q. [/ V - BCC .Next_10
+ H" f4 v, J: A0 C, F! T - LDA FC_Music_Max_Index
, N4 D0 d6 t* B - .Next_10- l: O& H: `6 i* S. M2 [% ^* d
- STA FC_Music_Index
# i1 T& j. U& l/ i4 E2 U" t; Y - JSR Music_Init_Process
. M* @: y9 Z0 W6 e9 j$ ~ - .End
5 \5 r4 y \6 A( ]- n/ C! d% ? - RTS
% K- @" v8 A, n( @
* t; u4 D" ?: T- ;----------------------------------------------------------------------
* \$ q& O: n. d) O# u" c - ;8位十六进制转3位十进制制) O9 n3 T0 B# d: ?9 T3 C0 R
- Hex8ToDec
; p# L2 u5 ~- x, f9 r0 \6 P2 ] - STA FC_Dec_Data_1" i) M% `3 Y" b/ v# H) D
- LDA #$00
/ X1 T" Q3 |( Z \0 S" D2 a# E2 Y# N! v - STA FC_Dec_Data_100
# F5 D, W! w0 e6 Z8 b. n# y0 D - STA FC_Dec_Data_10* `2 H) c* D( `8 E
- LDA FC_Dec_Data_1) c3 P; |0 U$ y
- .Convert_100
. X/ ^8 f# D4 {8 u: O- ]! z - CMP #1005 A/ ]2 a2 Z/ V Z+ l. R* b; ^, y
- BCC .Convert_10* s7 n+ q7 E2 ^4 X2 e
- SEC
: V, p5 |3 _- u l5 T - SBC #100
" S! h& ]5 `; r. {6 U - INC FC_Dec_Data_1008 V% H, B, ^& s; O+ s. D6 [4 @
- BNE .Convert_1007 c) x a9 W% k, R: L1 ]1 Z4 r
- .Convert_10
' C2 M& i: S* Y6 o( g& E - CMP #10
7 f# t" o% K6 w9 O7 i$ z1 Q - BCC .End9 ]1 Y5 l# P7 d0 R1 j7 |' b# W
- SEC- L- T5 N" u! l! M' r' ^$ ~
- SBC #10# U) u$ J/ ?% Q0 [0 g, Z! W
- INC FC_Dec_Data_10) F- M5 Z1 p# U, Y
- BNE .Convert_10
6 [$ F# p) P& Y& @ - .End
; P4 H6 X% A; n L* V, `! b - STA FC_Dec_Data_1
; C; K% V" m) B& |& A, N! K - RTS% u( k- P c5 v. J! H: \
! w6 b& N2 b8 q7 u6 d5 C8 R- ;----------------------------------------------------------------------3 I/ }! r, N( n7 G0 C
- ;显示曲目信息* i7 a8 W% |( j0 c3 {6 w+ W- D; v! U
- Music_Info_Display5 M% \3 [' Y2 o+ `! K( c
- LDX FC_PPU_Buf_Count
' T2 A; z' x* j8 E+ ~ - LDA #PPU_WRITE_MODE_CNT_LINE: _" h' x, n2 a1 _: E& N4 [& m( c
- STA Use_PPU_Buffer,X4 E; @! L! P5 B( ~$ d
- INX
& Y, o0 d, V2 J# a& _ - % E' V {5 _* S# k1 Z
- LDA #>MUSIC_INFO_POS
; H ^" ?/ n- d/ @" S( B0 D9 b - STA Use_PPU_Buffer,X6 m; |$ \4 q! s+ K2 s
- INX
4 W' u+ ^/ U6 K3 U/ s - ; |( T6 q9 R( a; n" P& k5 j9 X
- ;居中
) C, M. z1 C* @- d* n1 y! x - LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
8 @, _; R1 m' b3 W. ~" g+ k; c - STA Use_PPU_Buffer,X
1 J y9 d# N E! m: V3 d4 F - INX) @ i4 ~) {9 o, n/ Q
- * i" M# u' A# ]8 |9 k% [/ f
- LDA #$05: i2 G/ l3 U. q4 X* J
- STA Use_PPU_Buffer,X
& q% S5 b; w+ w - INX8 e5 l8 ^2 p# A0 A9 ]
-
! i+ _8 j2 X/ [. `& ? L - LDA FC_Music_Index& G$ A, u1 x+ t0 O2 m ]
- CLC
/ s+ K, k5 K3 { - ADC #$01& v e* [9 `2 r) }- {. I% x5 @
- JSR Hex8ToDec. R c; U' v1 |! Q0 _. Q* `
-
) @& H$ W% L4 M - LDA FC_Dec_Data_10' r& Q3 J+ L' t) Q
- CLC2 H9 y3 S: {5 K$ O+ J5 L$ v& w' t
- ADC #'0'* ~1 C- q" l- k+ s7 j8 |# M. G
- STA Use_PPU_Buffer,X
4 R# F( \% ` i; G) { _! E3 ? - INX
o+ e0 r0 u4 \# f! P# G$ S - ; h4 w0 @: d* I4 t/ j0 b( \
- LDA FC_Dec_Data_1
2 s4 t4 r: A, \7 s5 z - CLC3 D( u- z! [- `2 ^7 c3 N* n6 B9 |
- ADC #'0'
O( \2 D) L3 ~* f: i3 h - STA Use_PPU_Buffer,X; W( d1 H( y% u
- INX/ \) Q8 S$ h$ W; W. `- v
- . }. V$ @: I' p, N2 q+ _& z
- LDA #'/'
5 ]1 Q& ?6 s+ n8 u4 z; o& u1 n - STA Use_PPU_Buffer,X/ o" X" W2 e. B, B$ f. B8 D
- INX
2 p3 z: q2 T8 ? - 8 l8 y- w# @3 B; ^$ u L
- LDA FC_Music_Max_Index+ t, o. H- t; ~& U$ ~3 g1 ^
- CLC
+ s% h8 R) Q' ~" o - ADC #$013 c+ x, W8 V9 E, x1 o t. i4 d
- JSR Hex8ToDec
* J& W1 H: z4 L g$ E$ Y - * \1 h8 }3 P6 [! U2 [$ L7 S2 {
- LDA FC_Dec_Data_106 c. m0 W; h2 |9 b0 s
- CLC8 C U2 B. ]5 ]5 e
- ADC #'0'
9 F1 D- Q/ |+ { - STA Use_PPU_Buffer,X
5 j' m; r$ W! `* f5 S' g; G' @3 J: o" s - INX
, i5 ^2 U8 F0 y/ v5 H7 L, ]- b5 `+ c - ; Z1 V$ F, t- E/ D
- LDA FC_Dec_Data_1& q8 n7 K# _$ {* M4 s$ z. x" ]
- CLC% ]! a# I3 n& H( [6 `
- ADC #'0'% o9 c( z1 F- n! }0 \8 ~4 `
- STA Use_PPU_Buffer,X
4 ?2 n" V0 @) Q% R+ F9 \% J& m( [ - INX
0 a* ~0 m$ k# T: O$ R0 O% R -
9 T* U9 C+ F6 l9 c$ K - .End% J7 y. O9 ]. A& a: {3 R
- STX FC_PPU_Buf_Count
4 P0 t: m' e8 _% F1 a A - RTS
: S, [( {& Q; Y+ D" K, B# \2 }
8 D/ v! @- g. `+ t9 H6 U1 M2 r- ;----------------------------------------------------------------------
- \* \+ ^; {" ?$ X6 e - ;音乐曲目初始化处理& I0 a. n1 s( ]
- Music_Init_Process
2 A$ `) Q5 }# D) `; C: e - PHA2 F5 h9 v" h' f2 K7 h
- JSR Music_Clear_Process. j4 N ]8 F/ c- F8 a3 N" E
- LDA #$1F
2 ]# }! R7 V. ~3 a7 a* N - STA $40155 i" o0 _9 V% ?: e
- PLA# Q, ^; A: v0 A1 }: B; ]# F6 [
- JSR Music_Init_Addr' T% a( m, h/ @8 W
- JSR Music_Info_Display
! D3 y% G+ K X/ m - RTS3 z5 u8 y2 r9 {4 g( r
- ; G' C" o8 ]( b" F$ i
- ;----------------------------------------------------------------------$ M8 P& W6 B" W/ Z# T6 A8 i E( L
- ;音乐播放处理
l- _) b: l3 e6 C6 N! }2 H# h& f i - Music_Play_Process
$ j* q6 ?9 V: f( u( o* n) i - JSR Music_Play_Addr2 Q/ k, g I6 z) H% k
- RTS
3 U/ k. l- J8 M! }
& j) U- K4 ~6 a) ^+ [' p- ;----------------------------------------------------------------------' C( T) G+ K* O5 w( _
- ;音乐播放处理( [6 K9 z8 p- j
- Music_Clear_Process
# E! [( a5 n% g5 |- V3 B - .IF Music_Clear_Addr4 R( ^7 a8 ] X/ }5 N; \" n' A
- JSR Music_Clear_Addr
. S x& c4 J$ O: ^$ f3 S - RTS( e( k) @" b- q
- .ELSE! V( K& ?( z* A, ?+ _
- LDA #$1F' S; T& A! l2 U' C0 g
- STA $40154 O# J1 q0 m4 z! @
- LDA #$00# i2 G- R3 S9 |6 A P* H+ h
- STA $4010. ]# R7 a6 f1 I- w& v
- LDX #$00! Q6 ]9 B' x' ?
- LDA #$00' _' z) e4 |) _: A5 F. Q
-
2 p/ X# ?& L+ b8 G' X - .Music_Clear_Zreo_Page_0) }/ l7 E7 F* J9 |% a/ d, P/ N
- STA $00,X
; H; ~! J! m: s; {( G - INX2 o3 H% h6 [& B4 v
- CPX #Use_Zero_Page_Begin
- y8 B+ Y$ I Q' H3 z2 S6 f - BCC .Music_Clear_Zreo_Page_05 }; m: l' X3 `7 O# {. \
- & q9 D, h6 t7 I) }0 O
- LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size+ L1 B9 [8 `. W! R( H
- .Music_Clear_Zreo_Page_1
5 |& x% n+ Q; a; @" _0 [7 W0 M - STA $00,X: f/ [% K. b! p& F# `, e
- INX
' F2 Q9 {# s& b7 }( d3 L% W( y X - BNE .Music_Clear_Zreo_Page_17 V$ [( R. |& I" p
- 4 f, i3 k2 U1 S& u1 s* g$ Q+ J
- Music_Clear_Process_12 c! D) o) U' d& I! t
- STA $0600,X/ [7 [' O6 k3 ~/ j: w' V# s! ~
- STA $0700,X& i: {3 v+ g- K; ~
- INX
, a+ o2 D4 z! I! J7 }; D3 ^ - BNE Music_Clear_Process_1
, A! @1 E8 z2 O% S$ S2 [6 ` p7 M3 r X - LDA #$10
* J7 ]. V6 R$ ?4 a0 q# [7 ?5 }; I - STA $40009 I" _& z7 l5 w$ \0 A* l
- STA $4004
8 }- d* w" H5 j, e; c - STA $400C# X' S0 g z+ V3 e
- LDA #$00$ p6 |) n1 F6 y, u. v# ?5 z
- STA $4008( o0 J) E$ z+ e( l1 P4 k: }
- LDA #$0F; U9 N2 Q/ S f9 v/ W0 y( y
- STA $4015
, P& j9 u( H( V - .ENDIF
. v6 d$ O, _/ g - ( `1 Z% p5 z; w6 J( {3 V
- RTS2 L; [) o" Q* A& i" [0 z
- 0 |6 g. W: a- M9 [ b
- ;======================================================================
; X c9 b& g' b8 d- u0 l7 L - ;重启处理6 Z/ p& u+ _# Z& ?6 g, g& I
- Reset_Program& _( |5 n6 A$ e2 ]$ p$ } j1 @( ` ^
- SEI% T' D' d, h8 O
- CLD
+ G% O/ x& X5 b' C5 P - LDA #$009 z% Z: j4 u3 D0 x/ X
- STA PPU_CTRL
+ v4 L4 l: a- K! h0 f+ T - STA PPU_MASK
7 L0 ]- }" m7 { - STA JOY2_FRAME2 t. T7 U% f4 Z6 e
- STA APU_STATUS7 o a, S0 R: j) C" @% j* D
-
" }8 A: _/ j+ Z& H3 h$ K# L- t - ;等待屏幕准备完毕
F: b' H( P1 d: ~ - LDX #$02$ F6 S9 O( ^5 w" A* x% ]
- .Wait_For_Screen_Ready! {5 O- p1 u. `4 c, p9 g4 v
- LDA PPU_STATUS# W2 b" [* |4 w5 s' D) o) E$ d
- BPL .Wait_For_Screen_Ready
- n6 P9 F7 L+ O T; C2 j) M0 x1 A - DEX9 Q. R7 p- ?( h8 ? t/ @) i
- BNE .Wait_For_Screen_Ready0 i L% ~8 \/ d- C# w+ t
- * Z8 P {3 `5 Y' O6 c3 F P
- ;清空调色板: D ~* L1 k& q2 f( P7 X5 c
- Palette_Clear( M' _1 i( R- p( i
- LDA #$3F" o+ H3 F/ y+ u/ c7 _
- STA PPU_ADDRESS; ~: m$ O' ]1 X; _; v. H7 t/ ~ T5 M! c
- LDA #$00
) P* o2 ~; M* Q( c6 S - STA PPU_ADDRESS
% ?& F/ F* C) l7 |+ f( o4 }) M - LDX #$20
, } c6 G- v2 N6 ^6 B! } - LDA #$0F
+ x D0 @( Q+ @4 g, R0 | - .Write_Data
( k- l6 c a v; I5 a - STA PPU_DATA; Z* R! T% m8 I- K( H. u5 Q& c
- DEX
/ N1 W& z, |$ e" m% O- @& u - BNE .Write_Data
8 e: M |: A0 O5 \7 a
; P' G# o2 @( R- ;清除声音 $4000-4013$ h4 A% U& n# w. P8 b
- LDY #$14
3 P% R. r/ E# e% c Z4 @) V2 o - LDX #$00
$ m" X; T/ s% R* f4 O9 L2 ? - .Sound_Clear
: \2 ]; ]: ?& q. G: U3 N - STA $4000,X
( T2 o3 B2 e/ | - INX
2 _4 V M$ G+ N1 ?/ X7 v5 n - DEY% j p0 z% H1 B' S
- BNE .Sound_Clear
) s/ t& Q0 f- D8 O9 ?9 l$ Z -
' c# `- N# S! p - ;清除 RAM $0000-07FF
' U/ C8 z) F( j0 Z) F( W, r5 H9 T! o - LDA #$00 F* P j- m6 j- Z! o3 }- i% D: ^
- STA $00
+ x! v+ I) u4 W7 s3 ^ - STA $01( S' A( u/ z6 r) n5 ]
- TAY& Q2 ]& O3 p5 D( X6 f5 x8 h
- LDX #$08
; i* h, [; I+ _& r - .Memory_Clear
t) O4 y2 G/ v" D" \' G, [" @$ d - STA [$00],Y( k7 b* W, f1 E. Y8 r7 L4 O2 k/ f
- INY# M: \ D7 w0 h+ y
- BNE .Memory_Clear
! |7 H" ]7 p. S. K! G7 I - INC $01
6 p- Q! _* U* S B5 w2 ]8 X8 S: Q - DEX
- J. j" [+ W+ R5 { - BNE .Memory_Clear; y- Q+ W: s+ Y
- ) N5 v7 g" M! y7 z* j* e
- ;精灵缓冲初始化
3 ^6 W; W8 ~5 G9 H - LDX #$00
" l+ Y- j- ], w, c - LDA #$F8+ D( c! _! @7 \3 R% X
- .OAM_Clear' `( w% Q5 x% B8 @
- STA OAM_DMA_Buffer,X1 w1 o0 { |0 X
- INX
6 i% D# N. ]; s5 w: G - BNE .OAM_Clear' @* f) ?' I8 Z: T9 w% ]
- ; w8 ]2 Q: u0 u. z5 s. o
- ;栈指针初始化
( T1 R `6 h2 B/ ^! x, j* k& b - LDX #$FF7 ?; A( s6 x+ X( W: ^( m
- TXS
* O6 x4 g3 p* I1 g) Q" F R - : {3 F6 \( h( K" n! f; J
- JSR Nametable_Clear;命名表清空
* O" w8 _+ i) E2 p; j; K/ E - JSR Palette_Init;初始化调色板缓冲) Z' ^# |3 x( r" \$ M9 P
- JSR Static_Text_Init;初始化静态文本
3 c- \, E# _3 [' i# Z* L: [ - + W0 {; u; D4 \5 l4 ?' O
- LDA #MUSIC_ITEM_TOTAL - 1. J$ F: f$ h, X8 G, u6 y8 p
- STA FC_Music_Max_Index) |$ t) ~# z& O; w
- k7 W, x: |; Z
- LDA #$1F& H3 B" J5 F$ n A& c' a# S+ ~3 x. {
- STA APU_STATUS5 T& ^! P2 j% D5 Z
- LDA #MUSIC_BGM - 11 B, j- W! k4 @8 i
- STA FC_Music_Index7 x6 b& j V+ ?" g
- JSR Music_Init_Process;音乐播放7 {* A6 p) j' C" b$ x% T( V# X: v
-
# f8 h* e( w3 G" P# Y - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态); B' j9 W& s4 K$ n
- LDA #$1E
8 k! p( }2 c, r2 ? - STA FC_PPU_Mask_Buf: p i% ]2 H% ?/ ^
- 9 b, r% |7 q* g" Z- D
- ;启用NMI处理- m3 O& _5 y, ^6 H8 q [: p2 m ^
- LDA #$80
* C: {" t Z. e; i- D5 f, d0 V' o+ } - STA PPU_CTRL1 S% e l# Z6 n6 Y
- 3 a! m7 r' [0 B. N- X) c
- ;程序循环, 剩余工作交给 NMI 中断处理; z* C4 X4 R, x. p, v8 [& e4 C
- .Loop7 e4 t6 W2 }, A3 w
- JMP .Loop
, ]; U5 M6 M" e2 r" l8 Z' \ - : G3 f) s- i0 t
- ;======================================================================% [, d) K" ?! c' O: s+ O7 J
- ;不可屏蔽中断处理) A* @. J% r6 d! F# X
- Nmi_Program1 j3 N6 d* O* W
- PHA
# _9 N2 A3 @$ ?0 c0 i6 H- z" \& V' w( ~ C - TXA
" d3 E* g. b% k$ A - PHA1 O7 u- g W2 G" V, F
- TYA
6 ?& a# ~; b0 F& P) V - PHA2 j$ @7 f9 ^' k) A. _4 G
- ; R# u& b4 L: } e( E3 J
- LDA PPU_STATUS;读取使得 PPU状态寄存器复位# j7 _. I9 |2 z* M* {* g) J0 I
- $ s4 Q' c" t. B. |' F
- JSR FC_PPU_Procrss;PPU处理
" \ r* ]" }* u( P, n) L - % U% D, _/ f# s, ]+ c, }0 c: e
- ;精灵内存更新1 l: V2 T5 ^1 k& j# }
- LDA #$003 h# c5 i- I R& E
- STA PPU_OAM_ADDR
5 L# g+ T: X* c+ |6 M: X9 X4 U5 x - LDA #OAM_DMA_Buffer / $01007 a( E1 F% G0 d2 p8 A7 T6 ~& `
- STA OAM_DMA. {/ K" P' i* T) H4 D7 u9 k0 b, ^
-
3 i1 b( ]) t, Y& Y! v0 ?. w - JSR FC_Gamepad_Process;手柄输入处理
# S ]+ w: v5 z' r5 O- m4 ]& N - JSR Music_Select_Process;音乐选曲处理6 F% A% `& f9 f/ `1 c0 A
- JSR Music_Play_Process;音乐播放处理
' s4 k) U1 n' [ - 9 _) M3 y0 L3 R" Z. n, a
- PLA/ R b1 L c5 B1 v/ ~8 \" g3 U+ G
- TAY
; }4 c, j5 b' h! I4 S9 ` - PLA' ]' c0 r7 o2 G
- TAX8 Y2 R0 r2 g3 E$ f9 H
- PLA
6 ~5 [7 L6 z, c6 V, O$ A
. U' T/ x' V4 Z+ S2 B4 Y3 _! j- RTI
6 P% W$ E& w) | - $ j Z0 g/ x+ w8 _9 F
- ;======================================================================: b$ g$ J) B8 |/ F8 b
- ;请求中断处理3 V w$ T% {9 P6 d( ~
- Irq_Program3 P" j5 h8 v. C7 k/ L: {
- RTI% e Y' d& d! k) a, i
0 j# ~: i. x: J( u* Q, ?- ;======================================================================
z) A L" n- z - ;中断向量表
9 w& M9 Q( A# F; A - .ORG $FFFA
# Z( S2 X3 @4 w8 _7 O - .DW Nmi_Program ;NMI触发时执行! C: q, ~4 V9 T8 q3 W7 |" v
- .DW Reset_Program ;载入ROM时最先执行
$ k3 a5 s, ?8 F" I* T* W - .DW Irq_Program ;IRQ触发时执行
% e2 K* M2 H2 j3 \
复制代码 3 g5 m: W$ z1 @
/ T$ T5 ]/ b% | v) n! b. R% W, y6 c
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