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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下
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以下是主框架代码:
4 \7 \' V5 T Z$ R; s( G- ;======================================================================
4 W8 N0 W: ~& g( E6 o" S2 a9 r - ;文件头
9 f6 [4 {& [- c: j) N; \* { - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量, _. i+ @: A8 G4 P$ l; {2 j
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量8 x% L) K) @ }/ D3 T4 T( E2 }, ]
- BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码/ V- D3 c8 L8 i% q; Q
- ;======================================================================& C9 v/ [5 w+ o- L) K$ p$ L. Y
- PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2
& O( @7 d* @0 y% x r: O - PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 10 t- [' |3 ~* E# u
- ;======================================================================
" H3 C- i+ Q( E7 Z, G - RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
4 b- A7 i7 j i% e, q5 j! W - RESET_ADDR = $E000 ;主程序起始地址# x. E. I7 s1 Q1 w3 I) D! V
- ;======================================================================
% b4 n. g% `7 X- x& d6 I+ P0 g - .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB! O5 K/ p" X! N; l! o& L8 e( b9 Y
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB8 V4 v3 h3 n% e; a! W) l% a) b" x" f3 B$ N
- .INESMAP 4 ;Mapper号 (0-4095)
5 S; R; X' p7 }; |. W, a! {/ ~/ J- G" c; [+ [ - .INESSUBMAP 0 ;子Mapper号 (0-15)
# w& ?2 Y: c9 c - .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)9 K, ]! b: w5 d T4 `9 H
- .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在). \8 s, y& k9 L
- .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数); i9 O7 X6 `+ w @& H/ C
- .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)
5 U, m4 a) o: x" I8 V - .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)
4 T6 Y- q3 `; p" O% R4 h5 j - .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)% Q5 P" R+ `) L6 m8 ~- g/ {
- .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)" m* y% C) u. z0 t" q6 z" O, d
- ;======================================================================9 v, r( v" E- }* [1 Q" \ j. f- P
- .INCLUDE "fc_demo_config.asm" ;全局配置2 ]% C% a6 C1 E& ^* B
- .INCLUDE "fc_demo_constant.asm" ;NES常量
* m( B! d' P; c9 ? - ;======================================================================
% N" x8 R' l {& p+ D4 H. K - ;音乐配置
! Y1 d' r1 E' d# Q7 b - .IF 0 = MUSIC_THEME 8 c% z }/ v6 ]
- .INCLUDE "data/music/Gremlin 2/config.asm": D( L; y$ O- f2 n9 X
- .ENDIF1 D! z& H6 g& \& ~8 q7 `" T
- , x% z, c. ?" ?* t) Q2 ], K
- .IF 1 = MUSIC_THEME
& {# Q3 x+ s5 Q+ n0 Z - .INCLUDE "data/music/Raf World/config.asm"# S! w6 S4 V ?$ T& }
- .ENDIF
6 `& V+ C% |9 \/ g. U% ~ - - e+ }/ ]7 ]2 h) U+ h' h9 F
- .IF 2 = MUSIC_THEME
) D @( N9 |! p( \& r' b P - .INCLUDE "data/music/Ninja Gaiden 3/config.asm"* t2 b5 C5 m* y" e+ T
- .ENDIF
$ R F' n3 v$ s' \* s( a - 8 P4 u- z( J& ?+ s; K
- ;======================================================================( v& |/ {% f+ S5 F; G) D
- ;引用CHR图像数据! e6 E# O2 [9 V
- .BANK NES_16KB_PRG_SIZE * 2
( L. [# j4 g5 z( p2 Q5 K - .ORG $0000( n+ `1 O3 [( @% D' P
- .INCBIN "data/bkg.chr"7 k# [4 L8 Z+ O
- .INCBIN "data/sp.chr"% l: ]/ s4 ^/ ]. R( p8 C
- 3 U* u4 p/ P2 i
- ;======================================================================# M- [4 u p' D; @
- .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank
; l' B. N. [' Q - .ORG RESET_ADDR
7 l1 E4 Z6 g5 b* V - ;======================================================================6 R* E" p$ |$ v9 V+ `6 a
- ;引用其他源文件
4 I7 o) k7 j/ J# C6 s2 W - .INCLUDE "fc_demo_ppu.asm" ;PPU处理
$ c* E9 Q& @! q& f$ n - .INCLUDE "fc_demo_joysitck.asm" ;手柄处理) k7 g; j5 ^% O5 ~6 ?, a
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理1 G+ N/ p1 t' E7 b/ i i v
- ;======================================================================
% c# ^: i* ~' Z; ~: J. A - 7 Y6 E! z* d, |# w0 R# X1 z
- ;======================================================================( u! i5 Z! P. Y, X, [
- ;等待VBlank到来
8 C* B* Y+ P2 d8 u) z7 H - Wait_For_VBlank
[3 y3 v& }7 M( {: f( n - LDA PPU_STATUS; ~) q F/ b# H. s* Q
- BPL Wait_For_VBlank
0 O h4 F4 Z# T - RTS$ }# f' ^$ M4 c) t9 ?
3 Q" @ v: L5 ] f) q8 S1 B- ;======================================================================! A$ b* M( P' h) M9 @/ V
- ;调色板初始化: J* W: H) B ^9 G9 Z8 C
- Palette_Init4 o, r: l1 a- m, A% g0 ?) K
- LDA #$3F( M+ Z8 H3 m& |% ^/ i8 h
- STA PPU_ADDRESS
D! U# u% E. L - LDA #$00
^+ b# W' U- W1 r9 w6 b# F9 c - STA PPU_ADDRESS: x$ S) |$ K5 ^
- LDX #$00( O0 L( s5 U' {
- LDY #$209 p7 R6 t0 I# n+ O# e
- .Write_Data
: R4 K) ]$ \$ V, x8 I7 q6 Q - LDA Palette_Data,X" |, R9 E3 ?5 l( s$ O7 s! A/ {
- STA FC_PPU_Pal_Addr,X
, E1 X- B" K1 O7 J a6 m+ o$ x. ^ - INX
) a) r5 F7 T I; H- r - DEY
& C: c% `8 Y: x. q+ I1 u: U/ B" ^: y# I - BNE .Write_Data5 d8 n2 R% `$ q# Q/ R
- .End# H9 x. M* i1 x5 S5 [6 E" T
- RTS# d: P1 @ }+ R
- ) ^* c8 P3 z/ U( z
- ;----------------------------------------; v" w7 F g1 k4 _6 C
- ;调色板数据
4 n: M. J# o x0 o0 b7 k - Palette_Data
4 q. I9 x/ Q0 X& ] p/ [8 ^ - .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B. J2 ~4 A1 k' Q1 T& o4 A$ [- g( f
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22! e+ u+ t6 n( Z/ v \
-
) [1 V' x0 P7 V: u' D - ;======================================================================* r! @# x. ~& X1 V# q1 W
- ;命名表清空7 _2 ~" x6 w8 M0 V
- Nametable_Clear" n3 K" B8 X6 y9 b+ i
- LDA #$20! ]5 w& G5 [4 ~. J( r8 ?
- STA PPU_ADDRESS
8 C4 `, {5 V0 b2 } - LDA #$00
3 B! m Y5 Z7 Z5 N) ?6 Q; T - STA PPU_ADDRESS& l& b/ d' F5 @, j& e- @
- LDA #$00' J9 E$ A, Q M2 i: D. a2 \9 u
- LDX #$00; y, m, S" k. n% E# o
- LDY #$08
# F6 W* q/ j1 y4 z( [( u' y - .Write_Data- F6 n. }- O! V8 S' i4 E! W$ X
- STA PPU_DATA" E! L( A" M3 _$ a$ T8 t% ]
- INX: @" O/ u) M/ v7 k' G
- BNE .Write_Data6 h# \5 Z9 Q8 Z0 B0 p1 w
- DEY
# \9 R+ k* p) i5 U - BNE .Write_Data
) ~$ L- k) c5 Q+ A6 } - .End' K9 O3 y- |0 L1 |! [
- RTS
* f- `0 N' V+ W; P
W6 \* X# s4 a0 A, ]8 r- ;======================================================================; Y+ }& S( b: z/ R: Z4 S
- ;音乐曲目切换, c, [4 m) J" p( y- Y* P- a
- Music_Select_Process" p; a0 m1 M6 [, t: V
- * A# w; f6 k. c7 R* h
- .Pre_Music;上一曲6 W @9 K; F+ L) Q
- LDA FC_Gamepad_Once I# N+ `8 L4 ?! b
- CMP #JOY_KEY_LEFT
/ |1 l# [2 v: e - BNE .Next_Music0 t& M$ [( |' Q- |7 Q8 A
- JSR Music_Play_Pre
! `$ r# O* o2 W; G2 [3 ] - .Next_Music;下一曲& W9 B) \1 v# Q2 i6 j2 a) Q
- LDA FC_Gamepad_Once* m+ [) M+ x" h% O/ B3 E
- CMP #JOY_KEY_RIGHT: |, h) E, }1 `$ x9 u) l& i: e
- BNE .Next_10_Music7 o! J/ e3 R W+ S6 e
- JSR Music_Play_Next
7 m$ k1 t8 H* o' O2 N2 \9 S2 F - .Next_10_Music;上10曲
) l/ |, u, j- y8 S* w" `7 y9 a - LDA FC_Gamepad_Once7 j0 B) H% i) Y& }* t& k* Z) O
- CMP #JOY_KEY_UP
0 T$ f6 s# i S% n8 d) q t* a9 W - BNE .Pre_10_Music% L: Q0 D u3 F- u$ ?" o) w0 S
- JSR Music_Play_Next_10& ^6 ^8 G1 _4 D+ \
- .Pre_10_Music;下10曲
: ^0 O& l) V* L; y. Y! D - LDA FC_Gamepad_Once4 p, E- k- y4 p% h: p! T8 b" h
- CMP #JOY_KEY_DOWN
. Y+ `" ^0 B- T$ I - BNE .Reset
+ o N' `% M: ~4 o - JSR Music_Play_Pre_10
a2 B5 I' X3 |% t' K; f, L - .Reset;重播当前曲目' D) J& r4 Y/ M4 U7 A
- LDA FC_Gamepad_Once; f$ p8 |9 V' m _6 }5 F: |
- CMP #JOY_KEY_START
, a4 f0 Z) O6 m8 h% e6 r2 x! k3 Y - BNE .End( R& z% n7 r( j, f* U
- LDA FC_Music_Index
. X4 Y7 D, X* E9 L. k, c# d - JSR Music_Init_Process
& n. H9 N7 C/ g3 Y8 @2 s: Q' e+ X5 z - .End5 E% F6 Q7 X, v' N" L9 O
- RTS
1 t2 W, ~: j9 z. E" P p - / ~2 q) i7 |, `& u$ z3 G
- ;----------------------------------------------------------------------. c1 C5 }# @7 b; N( W
- ;播放上一曲
! d- P6 ], y- m0 l+ w - Music_Play_Pre
& a: }( p# f% k/ }" o9 [; ? - LDA FC_Music_Index
0 q) {9 I) B5 d" M' ]7 `9 {& B) q - BEQ .End
; N& c2 [3 C8 {$ t1 A1 m8 x - DEC FC_Music_Index. j( j S; d! ^( ~
- LDA FC_Music_Index% t" |! d/ o5 B; c& ?8 ?7 j
- JSR Music_Init_Process
* h$ |. A5 v! t9 ^* V1 c$ u8 N - .End
% i2 S0 L4 X; u( Z) T5 Z2 } - RTS2 I7 _+ g( h2 |3 l) Y. A& E9 H4 h
- ;----------------------------------------------------------------------/ X) z$ w' p: p0 R1 D
- ;播放下一曲
) I9 L1 @" l9 F: Y" d, V - Music_Play_Next% r/ b& U( d* u. J) M
- LDA FC_Music_Index2 j' s# V) `) M2 p
- CMP FC_Music_Max_Index
4 [/ F. O: J& c9 ]8 J4 s- @. t - BCS .End% r9 @. I& f4 R2 M1 r F; i
- INC FC_Music_Index! Z6 ?6 j1 p% s& f; L5 ?/ e/ O
- LDA FC_Music_Index) R) Z3 }$ S* v: Y, g
- JSR Music_Init_Process- d8 S, r/ S! _) u# S: s- g
- .End
! B, C5 X7 N7 ~4 a& ]; L - RTS
9 Q6 d% {* P2 u5 z" k, _' f/ I0 g
( z* b5 p0 c! u# y* V- ;----------------------------------------------------------------------
; k' P: D7 h% e& ?" N' h - ;播放上10曲
- T) N! z' ~; i8 l) f: Q3 B - Music_Play_Pre_10
7 r1 ]+ ?2 K( f0 z6 j! S$ J0 g - LDA FC_Music_Index1 h1 Q: j, V$ _0 ^+ i; r) q
- BEQ .End) ]% O- O& l2 P. c
- SEC' J' W& O2 f- l
- SBC #109 M' T/ D& [( O+ f. a
- BCS .Pre_10
! a9 ]# i r4 b* g& c( i - LDA #$00# A. L# o; Y! a- ?, S" x
- .Pre_10
+ u+ X. @- f# G8 N7 P0 ?$ i) B3 n - STA FC_Music_Index3 v- {( e# B- {. `0 v
- JSR Music_Init_Process* L+ q! N# B8 i; l! t- F* ~- ^
- .End
: t" |. D/ S; g% S - RTS/ v/ s8 _1 y/ i- n
- ;----------------------------------------------------------------------
9 }6 F9 `, V2 F) m6 d( K - ;播放下10曲2 a% g% I1 x- m9 E4 A( M9 w+ X1 d: `
- Music_Play_Next_10* m3 _8 D8 u# ?7 Z/ K9 y [+ d
- LDA FC_Music_Index1 O# @8 X9 f% K; R }
- CMP FC_Music_Max_Index# M: ~, Q; k' G/ t7 v! I
- BCS .End) s" n% G4 p" U; f* t+ G$ R
- CLC" H4 k! h4 q) {5 ?, a* [% p$ m
- ADC #100 ]: s N! `' a! ], d) q _
- CMP FC_Music_Max_Index; u6 Y' M) Y8 {: m% n
- BCC .Next_10
# P; Y9 N: w0 P2 _ - LDA FC_Music_Max_Index1 C% @+ A( w3 l1 L9 b, M
- .Next_10
/ u! U8 _( F" J" l- @' G- Y7 e1 W% Q - STA FC_Music_Index
1 X$ E! |6 c6 y9 s - JSR Music_Init_Process
2 J$ |1 k# Z* p7 `. P - .End5 [$ W& e" l6 I- j% e
- RTS
5 N s* {; l& j; n6 `0 f - ! x0 @/ o5 [# T! Z+ c
- ;----------------------------------------------------------------------; G. K2 r9 X- W* m( }
- ;8位十六进制转3位十进制制
% d9 C. Z6 c! e/ i# `+ M5 M - Hex8ToDec+ B, N& G4 K9 |( y! k. n. m5 |
- STA FC_Dec_Data_1, D. i `5 C/ x- Z# |1 l# p' v9 w
- LDA #$00
f0 H8 n! C! z0 ^9 b - STA FC_Dec_Data_100, x# ?& H* M$ Q0 d
- STA FC_Dec_Data_10
2 Q. p u0 ]0 P2 j* f - LDA FC_Dec_Data_1
$ \, [! V" n( ] - .Convert_100
0 @5 c w% t# {) |! ? - CMP #1005 E6 f9 o ^# [9 [ z1 _
- BCC .Convert_10
8 M7 U( Q5 ?$ G4 R5 P) [ - SEC
. e1 A) t9 {8 i. [& T+ |" j - SBC #100
n1 C! ?' p' D* V! u0 M8 Y- `" i$ x - INC FC_Dec_Data_100# f- b0 X; G; m+ b8 D; S0 L
- BNE .Convert_100
E1 k( x, Q4 w5 T2 K - .Convert_10' C# @$ g2 D3 u7 Q0 C
- CMP #10
0 k; t5 k% o0 D0 m1 ]4 t) j" l - BCC .End
) Y: L$ C% T+ x) X" O. o. s - SEC1 n) s% N+ K6 t, e) e. i2 I
- SBC #10
3 ^: d; \- K+ L/ M: y% I, ]" m - INC FC_Dec_Data_10+ \. N6 E3 X; Y1 e/ I7 S5 M
- BNE .Convert_10" n, z8 _7 b2 M
- .End
+ `! {% A/ r6 b# J - STA FC_Dec_Data_11 h) B+ J2 n# ]
- RTS
/ J2 l0 \, {9 n: e9 o - 0 q+ R6 T, }; e" m, T# S( T
- ;----------------------------------------------------------------------
% L# v- v! W; ~+ U+ r' U$ C - ;显示曲目信息
q3 M; M( ~ {5 l) g3 I - Music_Info_Display8 ~3 A3 [) C/ u( A1 M4 \; f
- LDX FC_PPU_Buf_Count
' B: [3 J8 r- ]* X. H% m - LDA #PPU_WRITE_MODE_CNT_LINE
J) C1 v/ n' I& q - STA Use_PPU_Buffer,X
% J7 B; u- ]$ }7 K$ b0 q - INX
& |+ z- l y0 h; { - 2 V( w4 l! G! m
- LDA #>MUSIC_INFO_POS0 N j0 w/ W3 Y2 P# V/ k. ]
- STA Use_PPU_Buffer,X
. m( \/ `* ]( T' D' _8 d. a# e - INX8 J7 E9 W' E: Y, N* W+ j3 b. P9 n
-
9 h/ G- ]( I) N! `0 }# o - ;居中- H* @! g) B, L2 T
- LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
6 K2 T% ]1 c7 N" I; A, C' t2 C - STA Use_PPU_Buffer,X0 f/ H0 ~( g2 c1 S" P$ n
- INX
( u) |. B& t# P# y {4 ?$ A -
2 r5 {5 E/ _; Q( q4 a0 M - LDA #$05$ v1 Y. k4 g. s) e% n
- STA Use_PPU_Buffer,X; Y3 B" m" U/ O0 X. J( o) N' b
- INX
7 e! y5 p" Y) Y3 z - % J$ B' \4 U5 T) a8 i
- LDA FC_Music_Index- ~) L. u$ @& e2 K$ X6 u' l
- CLC2 Z, z+ q) [- m9 V$ N8 B
- ADC #$01 g+ H3 F, i; A1 ?% X
- JSR Hex8ToDec
( @2 z3 |7 }. T! Y1 {, N# D -
6 s Q0 n# i' W9 Z9 i/ } - LDA FC_Dec_Data_10
+ s3 E C X, n7 t/ W- | - CLC
& {; _3 u' }/ |( i8 ?9 [8 I: |( z0 e - ADC #'0'' M9 V2 T$ t7 o
- STA Use_PPU_Buffer,X& }1 a+ o4 {( o- C# B/ I. T
- INX) Y3 P7 I* z1 F
- 0 f, G; p! L) x( R% G9 R
- LDA FC_Dec_Data_1. V3 Z6 |' o6 S/ U6 J
- CLC. Q4 P6 s% C m3 n8 Q: g1 e1 H
- ADC #'0'
$ T/ Q# T$ j: n: r0 D$ z6 ~ - STA Use_PPU_Buffer,X( G$ Z5 u8 t0 A! \4 J
- INX/ Z/ O- E2 s# y
-
' s+ M. Q( j5 r0 H& d3 m. e/ H - LDA #'/'
' M z: T. r& }& Q) w% b - STA Use_PPU_Buffer,X2 N4 l2 Q7 [% w" T/ g( n0 R
- INX0 R: c+ j* @; y
- 5 R3 J) ~/ u' g% m$ k0 _
- LDA FC_Music_Max_Index
8 _, h; e" ~7 j n7 W$ R# r$ } - CLC: f+ y. D4 f! ~, ~9 S+ _
- ADC #$014 K* u7 r$ C4 F5 n+ n
- JSR Hex8ToDec- e1 J- U. f4 I, e( c
-
2 F; I+ `0 G4 n5 D$ _ - LDA FC_Dec_Data_10+ y7 L4 _3 S) r0 w* x. U
- CLC, A' |) r0 ?8 X
- ADC #'0'
# g( R. e7 i3 f - STA Use_PPU_Buffer,X
7 r# G( j/ E& a5 v) M - INX
; z2 D9 k. W2 x6 R' @6 n -
3 B: I; J' b3 k! ^) @' f: D - LDA FC_Dec_Data_1
7 f$ {4 q6 k& `8 G - CLC7 K' u6 E! D/ ]0 N3 s
- ADC #'0'
) c: D1 ^# [6 z, c! s6 w4 G8 Z - STA Use_PPU_Buffer,X+ C* d% k: \+ A( k% W! U
- INX: {. G4 }8 \% n1 I
- & Y( w+ F" v' ]( q5 C; H# s
- .End
& O$ {/ U* G/ C' [" X7 i - STX FC_PPU_Buf_Count
. {' J0 r0 ^/ q, M; t1 j8 e. I6 K - RTS
4 B3 F7 g0 \6 Y9 [6 P( B$ m - : k* N% ~8 k/ R# R0 i
- ;----------------------------------------------------------------------( u9 k5 L% P# r) `7 h: a: ]
- ;音乐曲目初始化处理
% F6 I+ K2 b% o - Music_Init_Process
. I6 m1 e2 w, \9 p - PHA# O! S( [: i8 {1 V, j- x
- JSR Music_Clear_Process
2 \; l+ M3 e6 n. L! t1 {: F$ X- M - LDA #$1F. s+ N2 s. Q! Y5 [( w$ \
- STA $4015: Z" I# J+ w! N Q8 I. ~' q
- PLA
8 c% n! e! Y6 d - JSR Music_Init_Addr# b& @' ?% h1 N# l( }$ k
- JSR Music_Info_Display& i T. `) V0 d5 q
- RTS
/ y z: I3 C5 y: q% T6 a
1 c w1 v) W: p+ D6 M9 d9 }6 K7 b2 G- ;----------------------------------------------------------------------
9 E$ c: o1 I2 k4 y6 l( g - ;音乐播放处理
# X* g: Z' q) o/ Y8 i - Music_Play_Process
8 m5 {, L2 r8 `0 M4 i- ` - JSR Music_Play_Addr
2 K, |4 L, x1 @! A4 S* R% c - RTS Q2 o) n; |) P7 \8 J
- : D( v& l) w% G# v3 q9 _8 y
- ;----------------------------------------------------------------------9 R9 ]% q4 h9 n4 d
- ;音乐播放处理
2 }! l6 y( g% y5 p" f9 n' x$ ~ - Music_Clear_Process
& H q+ r% T/ `$ l3 n }: z6 ] F' a - .IF Music_Clear_Addr
$ [$ v: B$ g7 K# g2 e0 {9 _" F - JSR Music_Clear_Addr
( |) L) w- s' j: e) }) w! { - RTS {# o, ^& I7 L b$ I5 A
- .ELSE# h$ t; O3 T# J- M3 M3 k
- LDA #$1F7 g0 @# A* I4 V) X& w) w
- STA $4015- f- j& f& Q1 h& p, L# w# O
- LDA #$00
: s. @# Z# c1 R: k& h - STA $4010
; { s' b W' B+ J! p - LDX #$00
. |4 H1 f7 b0 t8 l1 d! G4 W& N - LDA #$003 m; ?$ \: e* ?
-
) H, C1 p/ R$ X1 `* \5 K - .Music_Clear_Zreo_Page_0; b& j" M; e# e/ J7 q! T
- STA $00,X
2 u. D! @- u+ M8 N: Z+ {- j; f - INX" I+ Z! K8 p% a6 V [3 Q( D" [" v
- CPX #Use_Zero_Page_Begin
3 {8 h9 g% j( g) r3 f - BCC .Music_Clear_Zreo_Page_0$ b7 H- B3 C5 R" g
-
2 m O5 C& _( W! {/ z- z - LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size: j: M s% u, B/ q
- .Music_Clear_Zreo_Page_1
$ Z7 s. E3 U! B - STA $00,X
2 m" N5 `) D. z- C - INX( @- [! O0 w0 [; C. |
- BNE .Music_Clear_Zreo_Page_1
2 n0 K( m4 L3 Z: { - * h3 T9 B2 u2 D4 B6 L1 r/ o
- Music_Clear_Process_1+ i& ^, A, c/ \ O, I/ T
- STA $0600,X
7 O& i2 w* i, b0 `+ \5 S# ~$ {4 H - STA $0700,X
/ f5 E& `. Y7 k, Z e; [7 i P - INX3 n" }1 o! `3 _ P. m7 G- b3 x5 m
- BNE Music_Clear_Process_1
6 f/ ~( U. n# q5 _8 C - LDA #$10
: B* x: d8 o8 e0 [( R+ P7 B - STA $4000
) R. f( G! \* I! r& Y - STA $4004- T2 e. i3 p! t: n$ |' O% ]. E
- STA $400C5 Q7 k9 l/ x% _8 |1 k4 I W
- LDA #$00
# i# U8 k3 X( r9 w; v" u5 } - STA $40083 S7 C- ~" `7 H D; a
- LDA #$0F
: w; C" c* k9 {% x8 R8 i - STA $4015+ U+ n! ~$ h6 E2 A( w4 ~6 D
- .ENDIF
5 A/ B# Y1 e0 G, F -
# D0 ~& t# e! K: [ - RTS
% ` c8 e6 g5 O& W# _. E9 G - 7 t% I% G/ v5 }! Y0 y
- ;======================================================================
1 T+ N6 q6 w/ o( I* U - ;重启处理
1 g( e! _ D* L$ V/ r: O2 U - Reset_Program: w1 ]' x( N' V3 k6 S' r2 d0 S
- SEI
/ x$ {# Y) @7 U! J% A5 C# M9 z - CLD' u9 n4 ]7 G8 ` i5 Z& c
- LDA #$00: T c" A% ^+ B- f9 ^$ F
- STA PPU_CTRL
5 E- `: q# k7 x) p5 o U+ i - STA PPU_MASK
Z$ W7 {8 |/ X3 m - STA JOY2_FRAME# |* G2 ~0 Y- ]# h/ l$ T4 `7 v3 q
- STA APU_STATUS
$ L0 E% U, u1 D - 0 \! i8 b8 o0 N* O9 Q( o- Z9 p
- ;等待屏幕准备完毕
: W$ S( s2 [. o# M; l2 p3 ?. I - LDX #$02
( u: d/ n$ R9 @# E, v M - .Wait_For_Screen_Ready
3 N8 ~! F4 k1 R/ X - LDA PPU_STATUS
$ }6 ~6 I7 G+ v9 T8 r$ x! a - BPL .Wait_For_Screen_Ready; y1 i1 B( Q' W; c: G6 U
- DEX
2 f8 K) `& U/ A+ B - BNE .Wait_For_Screen_Ready2 m% c0 ^: B) s0 }
-
4 L0 h# e7 r. U* ~% Z/ n - ;清空调色板
) n2 I$ A1 Q5 M- F+ W6 t0 A5 a - Palette_Clear7 ~# L3 R. G9 d1 E) ^
- LDA #$3F
! Z: w2 w- J5 e3 M - STA PPU_ADDRESS
* J$ u/ H9 j& V: } - LDA #$00
~( Z" u' q; h7 O - STA PPU_ADDRESS
* d# V- E; [5 D: f2 n$ A/ v - LDX #$201 V$ n7 [2 p1 i; k& U
- LDA #$0F
% c- c" f: }) z- B3 f8 U8 O/ ~ - .Write_Data! Q# r1 d1 }& V, n
- STA PPU_DATA
$ c' l# f, V0 A5 w - DEX% ^: O# U- A$ H6 s- J& D4 R
- BNE .Write_Data
% T: e. _8 J, a3 L$ C. i* d4 y
7 ~" O* S3 T: X8 |% m- ;清除声音 $4000-4013
) P' [" r) R6 o: o3 ^ - LDY #$14" Q$ q+ A9 N6 s' L4 U5 g
- LDX #$00
: M4 D" O) D4 _! h& ^8 d - .Sound_Clear
0 ~1 y% i* q9 k5 Z& U$ G" O - STA $4000,X V. z" @$ T$ o8 J0 |5 H
- INX
' M: d. y0 H/ H+ V - DEY
- w8 f2 w; o3 {) b2 j - BNE .Sound_Clear
3 q8 b' }2 u/ y7 U7 F- h -
. v+ f" p1 L5 }7 P" t! Q - ;清除 RAM $0000-07FF6 i, P# F) @* v% v: _; [. E
- LDA #$002 q2 b- R$ N, W/ [# O
- STA $00
) M* v0 n& D7 T6 L - STA $01
7 ]" z# _; ^# v0 c+ q - TAY& G2 ~! S, q% Q* m; y
- LDX #$08/ f9 g3 l; e) ]5 `1 j1 t5 s
- .Memory_Clear
9 W9 Y. E5 ]( F. u4 X q' o4 ? - STA [$00],Y0 r+ i Y! m/ G$ a$ H; l' v
- INY0 C* f( I1 J* I" T8 y! k# f! T1 z8 ]
- BNE .Memory_Clear
# c) k# ~7 d3 p9 p/ J2 y3 m2 N - INC $017 x" u5 n8 e# e. S. N$ K
- DEX+ g; A2 o" j' Y8 ]- `
- BNE .Memory_Clear% J; D3 Q) | t: S2 {
-
. J3 [+ {: `3 v# V - ;精灵缓冲初始化
: f. a1 h( C1 f - LDX #$006 ]9 T" E2 ?& Q% z# `$ p; s3 B
- LDA #$F8
1 U% k/ U7 O$ l5 M - .OAM_Clear
5 s$ b0 O/ u# J' ?+ B+ w% N' ~ - STA OAM_DMA_Buffer,X
. F5 `* K3 D5 T% V: p; i - INX* C M+ K5 }* L! e6 S& S' T0 C
- BNE .OAM_Clear1 x R# h0 G* h- m+ n( b
- 1 Z; U2 W7 i5 ]4 b. ^1 ~, K/ _
- ;栈指针初始化* g/ U! I7 U) e5 S/ C0 u
- LDX #$FF
% k9 P- h) L& A W! j# ` - TXS4 x' s* G( N2 Y1 L
-
`2 i; x4 X1 Z8 f; \: y) O - JSR Nametable_Clear;命名表清空& ^" h; P' t# ~9 M6 _; O
- JSR Palette_Init;初始化调色板缓冲3 ~! G$ t4 D9 i* X6 ^
- JSR Static_Text_Init;初始化静态文本, Q8 L- F4 O$ t( H0 n( @
- . m# o& {5 `& d
- LDA #MUSIC_ITEM_TOTAL - 14 u+ a& v; ~2 _5 w$ z" ]
- STA FC_Music_Max_Index/ o& Z, Q" o2 y% l9 K
-
$ ]5 G5 z# U R# C! N( c - LDA #$1F
7 R9 r: s& l5 A8 Z - STA APU_STATUS6 ~% m8 k9 ]% j: @/ b
- LDA #MUSIC_BGM - 1
3 V5 F0 c( C1 O# l5 r - STA FC_Music_Index2 u q6 L+ P1 V* [$ {
- JSR Music_Init_Process;音乐播放& K3 X) o6 ]* ^& P
-
) t& \: w2 r; Y7 h4 x4 [ - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)1 S" P( B5 C- w0 y( B! R4 l" F
- LDA #$1E
" f2 V: O' d9 B+ r - STA FC_PPU_Mask_Buf! z: W0 w# r5 X' n" u3 H
- 3 J) P8 @1 T8 j' u
- ;启用NMI处理
8 Q# g. ~% V$ I; l6 c: S0 z; J7 g - LDA #$800 b6 ^7 ]+ d" S' t( b" `
- STA PPU_CTRL: L$ a% f4 P {
- 4 F/ F: g% f& k: S6 M! c+ V0 B% e
- ;程序循环, 剩余工作交给 NMI 中断处理 ~- N* F5 Q% k1 a
- .Loop
/ w% q* F( r4 ~6 _" t6 B6 }' z - JMP .Loop2 i2 n9 p4 @: G9 s
$ S3 X W* T2 I9 f) L) m- ;======================================================================
5 j/ N7 R. h- u7 v' ]7 e& J' i - ;不可屏蔽中断处理
$ n; u) { s* v+ s& {5 E - Nmi_Program5 r8 }% i2 ]$ D* x6 H
- PHA
! n2 u8 I$ Y( e0 n0 k* p, Z - TXA5 w! m$ @, s, o7 W4 Q
- PHA
N9 U2 A' w& {! l- u - TYA& u3 l& @. V' V' D* r" r- {9 o
- PHA! u( }' v. f+ b& B M
- / ?* c2 X5 f0 a! `6 I" B( h; u
- LDA PPU_STATUS;读取使得 PPU状态寄存器复位
' O y1 A9 O2 A -
3 f. U2 i3 l# @9 ~8 i* q9 Z - JSR FC_PPU_Procrss;PPU处理
/ V$ N# G+ q) ]" m' @0 Y# R -
: L8 O( }5 Z T - ;精灵内存更新9 J! B- j2 R9 u# {6 S
- LDA #$00
1 W9 l, |4 ^8 o5 ~3 { - STA PPU_OAM_ADDR
5 R6 Q0 x1 B4 m- m2 T - LDA #OAM_DMA_Buffer / $0100* @& h3 h1 v( u+ m5 o, R
- STA OAM_DMA8 ]/ w6 h) U% s0 r
- . b$ W& v' J( `" |& f
- JSR FC_Gamepad_Process;手柄输入处理
4 j/ x& V' y* Q* d - JSR Music_Select_Process;音乐选曲处理! e. `- b) m* k. L% a9 p
- JSR Music_Play_Process;音乐播放处理$ @- R, m+ n9 z
- , J4 E }+ Q' U* E3 X* I
- PLA
& [" p5 r+ |! b2 p - TAY8 Y, I3 [; w; Q. p/ h2 p
- PLA
% U; k7 \0 A! x: g - TAX& U, X% k P4 G) P; i2 R
- PLA) u4 M3 W! F7 D% T
# D: g# t( d. t7 ^ w4 V# L) d- RTI
* M7 @. b% A$ I, a. l8 K. W
. M9 g; J m9 d, Q- ;======================================================================
7 P. L# j& l- |/ ~' i - ;请求中断处理5 {7 o) G6 f# g/ L
- Irq_Program9 T- g; q/ ?* F( P. X% |* G
- RTI
- b" c+ M9 ^; g- d0 y9 O# ` - 6 \# \$ S& i9 {% c5 G# r1 w
- ;======================================================================
" n$ ~ W, M& S2 F% }) o/ ] - ;中断向量表
- a# e ~4 h& \6 S/ `& a - .ORG $FFFA4 Z* Z/ H; K5 K$ M4 I
- .DW Nmi_Program ;NMI触发时执行; d- a, X. U/ ~( H3 D
- .DW Reset_Program ;载入ROM时最先执行
8 `) J5 W, m5 m5 v8 o `3 a - .DW Irq_Program ;IRQ触发时执行
7 D5 M& P. y/ Q+ v3 I1 @9 T7 i& P! b6 R% F
复制代码 3 N o7 g) q8 k/ m
! k5 c o7 I9 T, h. E* O
9 M9 I6 P' t" T3 [/ {3 Xhttps://gitee.com/flame_cyclone/nesasm_3_2 |
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