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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下
! A5 `! h5 Q A, j7 T' @
7 J+ X1 y; s: g4 X/ I% S) M以下是主框架代码:7 f% T/ ^7 e* a
- ;======================================================================
$ D7 H, c. }7 o# U; c& S% |, m7 R - ;文件头
% u% i; d: b8 ?1 B' k* c7 W$ M - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量8 B& l/ z* E/ [; @1 R
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量
# Y2 P& I- p. q% G1 @ - BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码
) ^/ e* r3 A) o2 U! c* d/ E - ;======================================================================( B& Q, [1 S" m
- PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2+ }( E9 R3 @7 Z* a
- PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1
5 T- P+ o6 Z1 D. G; f/ {3 b - ;======================================================================/ Y, R- \. L; ^! y* k; r
- RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
7 B' l. g& h4 g# n9 D( N - RESET_ADDR = $E000 ;主程序起始地址
1 _0 H1 y2 k) o7 N6 V7 l# \ - ;======================================================================& C, M3 ?& H$ E4 q! a3 B0 @; W
- .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB# S: D$ M' V8 r% Y6 O- E {( |
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB
+ n' @, l/ l- s$ N. P K! O1 o5 N0 y - .INESMAP 4 ;Mapper号 (0-4095)
, I% `- b' Z6 V, K: G( ]4 o; E7 R) t, k/ ` - .INESSUBMAP 0 ;子Mapper号 (0-15)
6 K, R% }) n4 W* F2 n6 X# f - .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)# c f: g9 O8 n
- .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)
9 U5 x6 A: ^$ D! E H/ V - .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)# l4 ~* w( z0 y: M* Q6 n2 f+ B9 ]
- .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)
0 j5 q) @. h. B - .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)$ S/ a- u8 B% M
- .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)5 Q% A. L' V) X W: ]
- .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)' {* F H# b- m8 F6 d$ `3 ]( u
- ;======================================================================) c6 B5 p2 K8 J M" h+ k
- .INCLUDE "fc_demo_config.asm" ;全局配置
! g8 V) V* ^1 m# P* j v; N' Z - .INCLUDE "fc_demo_constant.asm" ;NES常量5 P+ h; f; k& `) o- k. b
- ;======================================================================
: C$ H+ c# `& Z0 V. f - ;音乐配置
3 E2 P% a7 o$ b( ]' ] - .IF 0 = MUSIC_THEME
/ t8 D3 v" w S3 P. D! ` - .INCLUDE "data/music/Gremlin 2/config.asm"
- J3 h. r0 n, J% c+ `" }( }4 T - .ENDIF
0 e! S' L* A0 x# p- i$ Z4 g - 2 o. P( S( j' F0 `4 ?
- .IF 1 = MUSIC_THEME5 j3 `/ o; C& x
- .INCLUDE "data/music/Raf World/config.asm"3 v: b+ V- ?- L: _. L' o9 o
- .ENDIF
: Q% a5 W" J/ I! ] S - & i' U' S% a7 k! j/ D
- .IF 2 = MUSIC_THEME 3 B5 \2 H( k! ~7 @" {/ T7 {$ M4 S' G
- .INCLUDE "data/music/Ninja Gaiden 3/config.asm"
' i: h( Z9 k7 `' |3 t - .ENDIF
* j- ~- \- D% B2 G+ E
: p. |0 e8 b2 R, A! l1 n8 g( V m- ;======================================================================* |% J/ P+ M6 b* x& h/ R. d
- ;引用CHR图像数据% y. c7 s# z( x* `
- .BANK NES_16KB_PRG_SIZE * 2
* {+ b8 K# Z+ F' ^, }& J5 O - .ORG $0000
3 Q0 w1 K) F9 K - .INCBIN "data/bkg.chr"
1 L5 W7 d, B' u& V9 S4 x - .INCBIN "data/sp.chr": O* ]5 w9 W- ^7 J
- $ k" Y# @ w! k
- ;======================================================================. D# W" x% x" X- _; H7 W% z
- .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank7 y0 u j- e* e. d" ]7 @+ n
- .ORG RESET_ADDR4 O2 v0 v4 {6 K# y- y6 ^+ h
- ;======================================================================
7 H( U% l% }5 v# o - ;引用其他源文件3 C. D6 P/ T8 G, Q
- .INCLUDE "fc_demo_ppu.asm" ;PPU处理
4 [8 w. S6 ~/ | - .INCLUDE "fc_demo_joysitck.asm" ;手柄处理/ i& Y; S, G6 g0 m& q
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理# C' q3 C/ O5 j) ^
- ;======================================================================% D L( c2 D+ o& O4 f4 R% ^3 A
- # k* P. r. q# t& z0 l( m
- ;======================================================================* a& ?2 `/ _# r9 R: w/ l
- ;等待VBlank到来
( t4 G0 ]; k1 h" X - Wait_For_VBlank
2 K: S7 `' \ l8 f8 B P! n - LDA PPU_STATUS; I* O1 O' `( b9 I& } [
- BPL Wait_For_VBlank) U0 j( @3 @$ K7 }# Y( R1 C
- RTS
& z6 n+ p C0 ?6 W - ) e% b( g$ O/ B( G# K7 X. Y
- ;====================================================================== {4 l0 ]: T5 n
- ;调色板初始化0 |+ N0 w* q' B6 q- i
- Palette_Init
2 e' p5 [" `, g5 M - LDA #$3F
7 G3 ~6 H" D( Q+ [ j) O - STA PPU_ADDRESS
+ @% w6 T8 ]( a - LDA #$00) W% i% ^( C$ W2 G9 }/ I
- STA PPU_ADDRESS
# {8 R3 W9 L2 L X - LDX #$00
& P( e' P3 J; X - LDY #$20
9 t( R, p" f+ K! { - .Write_Data
6 Q* E! d8 n* Z9 t& `$ ^( T. n - LDA Palette_Data,X1 F2 `6 E: Z8 ?0 _% s- [
- STA FC_PPU_Pal_Addr,X
; _; Q: H/ {) C2 z - INX3 o: }5 F- m! m
- DEY8 J, p: K; Z& {8 { N, d
- BNE .Write_Data$ u, l% P0 H4 u2 \
- .End
7 q9 j% v( H8 ~ - RTS$ D* `: n; Z( \* R1 r/ V2 g8 E
4 S3 Y" G! D T+ I% M- ;----------------------------------------- w) z0 s' a! X( _
- ;调色板数据 a$ G4 R8 Y2 u, ?1 H
- Palette_Data1 q* ?) n) D2 c( {
- .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B
4 _8 e# e6 w( [$ g: F - .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22
/ U! _ f. G8 q/ _1 E- n9 D3 H$ f - $ U5 ]; P/ w$ f( I) N
- ;======================================================================, P# b, B; W; _: |
- ;命名表清空1 a5 Y; E' i8 p' D1 ~5 @
- Nametable_Clear) X+ s' e' r2 B" B" l9 ]
- LDA #$20# h! P" ?) R! _$ v
- STA PPU_ADDRESS
- V; q9 Z0 q# f* X u - LDA #$00; t, M9 T5 U z7 x# C- h
- STA PPU_ADDRESS& v% x) d9 b6 T0 ?' L, d
- LDA #$00
! ^; |$ z+ k0 }) t/ v6 L) @ - LDX #$00( v. y' M; C# O
- LDY #$08
' l, Q/ Q8 v$ D4 c3 Z- T' W - .Write_Data! n" R6 ]$ f( l5 m: W
- STA PPU_DATA1 I2 [9 c& k! P, h* Q3 O9 x
- INX
0 l# z! _+ ^+ z2 u - BNE .Write_Data
! }8 D9 m8 @1 t$ N4 g$ _ q - DEY
2 D$ |; ]1 d4 Q - BNE .Write_Data
9 E7 Q4 Z2 d6 z - .End
) B+ Q7 r) m% j: B" `7 ~4 n: K - RTS, V U! j- Y9 ~5 f* Q7 M
7 H9 u# Z; {+ V$ p! R- ;======================================================================( b# H0 k7 v. N& n' C7 j- a% H
- ;音乐曲目切换
& _; O2 p H' f8 n- u* a# B - Music_Select_Process! [ T; j# s1 |8 {8 B1 K
- ( w# a |7 j- Q/ S
- .Pre_Music;上一曲' `5 i9 S9 a' C/ ?
- LDA FC_Gamepad_Once4 G3 Q2 ^* r! X) O7 ` ]
- CMP #JOY_KEY_LEFT
* u2 W) Q; \3 n3 c s - BNE .Next_Music
1 I7 O. N# v# G4 t& h - JSR Music_Play_Pre2 ?8 g4 ~" g7 u2 m* r
- .Next_Music;下一曲- `7 w5 k" }6 g7 }1 Q2 J6 F
- LDA FC_Gamepad_Once
* g; e" D: _6 U+ o - CMP #JOY_KEY_RIGHT
; I# C$ I: e( T" |' `& W @ - BNE .Next_10_Music. V3 F+ e( D/ l8 u" b
- JSR Music_Play_Next
) L& G$ t7 i* \# @% ~9 c9 c7 l( ~2 ~ - .Next_10_Music;上10曲
& \" f8 s. R* M& d2 E - LDA FC_Gamepad_Once" ?9 o1 L, Z: e+ R! \4 u
- CMP #JOY_KEY_UP9 `) ]/ `0 c* l# d% T. B- I0 I' a2 u
- BNE .Pre_10_Music( Z- @8 B' }4 _. T# I/ l7 e
- JSR Music_Play_Next_106 _; h v6 T9 E
- .Pre_10_Music;下10曲) \9 Q) g0 r# \4 I0 {! |
- LDA FC_Gamepad_Once# J% b D5 @5 p: N
- CMP #JOY_KEY_DOWN) h# }- q2 E+ B7 r# L$ y
- BNE .Reset' s3 \6 `- k" C9 o0 ?
- JSR Music_Play_Pre_10& Y) R6 \& p2 C$ T4 `- ^: r* E
- .Reset;重播当前曲目9 u8 U1 r7 K( H" `/ X
- LDA FC_Gamepad_Once/ I- g( Z1 ?* _1 D# v
- CMP #JOY_KEY_START% `6 n- [9 F8 c+ s. ^
- BNE .End
& C0 i) W3 p' `' e. e - LDA FC_Music_Index
+ _! m* _$ U+ ~9 ~$ u: Q5 E* r - JSR Music_Init_Process. O: p" k, u7 x2 b
- .End. W" ]/ E4 n& T7 u
- RTS
5 W% U: a( o e) ~" B
) T2 l' E- l7 \4 l. {# t. B$ X4 n- ;----------------------------------------------------------------------
+ b6 Y3 }# h/ q* D% m - ;播放上一曲8 p2 x3 u, r9 I, w
- Music_Play_Pre% @5 t4 K" O( F2 [; n6 m# O
- LDA FC_Music_Index
. ~5 p4 I4 m& n( O1 y) v4 p - BEQ .End+ r% k( z1 k7 Q0 \
- DEC FC_Music_Index
# ^7 t2 s5 n7 S0 h4 e% V - LDA FC_Music_Index
$ n. i4 T( M/ l9 }" m8 @4 @7 A - JSR Music_Init_Process4 m& P" S9 _8 B, W$ ^/ O
- .End% n* d+ V2 R( X* p# V
- RTS
& C5 `/ g$ H% V - ;----------------------------------------------------------------------
# W: M8 y1 z) Z/ r* d5 m - ;播放下一曲4 O9 p% o" ]1 t4 a2 \
- Music_Play_Next- r6 a2 @& a! b5 l: p
- LDA FC_Music_Index
, f; ^4 U; m0 _ - CMP FC_Music_Max_Index
7 X/ s% u3 ~/ K8 o" u, L. x - BCS .End
( d; d% Q' U; M# _/ \9 R* N - INC FC_Music_Index4 {3 b( v; s% }0 x9 g$ H
- LDA FC_Music_Index
|" v( Q! C7 g! Z: N - JSR Music_Init_Process) Z- A2 v+ H- e+ Y
- .End( w3 E0 P; Z6 X0 c) l
- RTS5 H) \' E* V% i5 @4 u' d
- # q6 J7 j* v! E6 v4 P% h
- ;----------------------------------------------------------------------
) i% l6 o: Y; [0 S% B6 z% h0 a - ;播放上10曲! B6 L0 w2 Z) t& S
- Music_Play_Pre_10
( H, z( N! T2 a+ e I( h8 X - LDA FC_Music_Index
6 h7 }# \; n! {2 e# z2 }6 m4 e - BEQ .End$ o0 h' D' j. Q$ o- r9 n
- SEC q u; d% s7 b+ w! Z
- SBC #104 U' i# ~) {! Q. S6 a, N. K% y+ |
- BCS .Pre_10
$ V' ` _; y% L1 i9 Z1 P" Y& S2 I+ C - LDA #$00
- o# s! o; z6 b4 m- I( ~ - .Pre_10* d m2 G2 w# M. f D: b) t: c+ V
- STA FC_Music_Index
. O( j- K1 {. p e& i - JSR Music_Init_Process h: {8 y, h# y/ e( l) Y; g
- .End+ t- d, i( `' z. ]2 N" M/ a7 j
- RTS
" Z0 n- ^+ ~2 L' I, q; K1 `2 c - ;----------------------------------------------------------------------
9 k7 {* T9 B2 U - ;播放下10曲- s$ E F0 W# b2 l4 b
- Music_Play_Next_10
: P) l! n* n, q6 Y. r8 H+ P. p - LDA FC_Music_Index! ?3 X; V6 A; P/ e
- CMP FC_Music_Max_Index y3 e6 \4 K: c1 ~
- BCS .End: g/ T b/ |- i( ?4 Q* D' A* Q" f
- CLC7 d7 U3 q7 o/ U2 M' o, g- K
- ADC #10# V$ i4 E& b/ s; |) O' s
- CMP FC_Music_Max_Index2 W& \# G( j3 x& _6 [7 A4 H& R' c7 Q
- BCC .Next_10
4 u- n# }, o D: ^8 O+ N. v - LDA FC_Music_Max_Index: I/ c- o9 L! m! p
- .Next_10
' T+ n7 V" I9 t! w, } - STA FC_Music_Index. E( @, |: ]0 D+ n2 ?9 Y8 n
- JSR Music_Init_Process, N: A5 G! P, a
- .End7 V- q1 J1 R- G0 l, o( s( L% B
- RTS' v* K1 x6 [, [( Y3 g" O
$ p6 Y" c3 z" }5 L) J9 W/ y. q4 q- ;----------------------------------------------------------------------
5 m6 H; i( J2 G& K& G& z - ;8位十六进制转3位十进制制1 X9 C( q+ X* l
- Hex8ToDec
5 W- t: {4 r, j2 v1 G - STA FC_Dec_Data_1
2 V$ o, E" l5 u' b2 Q - LDA #$003 M, s0 E! D( |4 h) n
- STA FC_Dec_Data_100
3 H$ ?# F9 d- c - STA FC_Dec_Data_10
4 ~, \2 m3 p; m3 {+ L, G - LDA FC_Dec_Data_1
6 e. k0 i/ R I$ t( ]# j+ _ - .Convert_100- F" x; m/ v/ t) l! i
- CMP #100
# @0 v% \! V) g& D9 H8 R% { - BCC .Convert_10
2 p' a% L8 Z/ M/ ?; j# S - SEC6 T8 K3 R9 A0 L h/ J
- SBC #100% s! }1 J7 g3 K) }5 ?# ?: A, Y9 I
- INC FC_Dec_Data_100
' H; x6 c9 I1 m& D! P5 z - BNE .Convert_100
) b4 h. r" @! } - .Convert_109 |9 i3 \ Q, ?: L
- CMP #10
; _4 W' d4 N. m+ e) \0 A - BCC .End
4 a/ c% s+ `6 r, F - SEC
/ C! q9 ?/ |6 t+ I5 V, \3 P - SBC #10
% @. U x0 D F1 G9 J7 x4 M7 u - INC FC_Dec_Data_10
# A- \8 X5 e1 l4 v; B - BNE .Convert_10
6 N- w4 J5 Y9 l0 J, @+ v" b - .End' Q3 P* b' Z3 C* K; c' l3 L
- STA FC_Dec_Data_1
U' X7 \# S% j7 V1 p" p - RTS$ N4 U6 g1 ?+ G% w$ m
- , h: D1 E2 ?6 r, {5 Z
- ;---------------------------------------------------------------------- M; L' s2 C+ y! s* _3 e
- ;显示曲目信息
6 w* w+ P) o6 R9 X8 B* O - Music_Info_Display# K+ F/ g5 {8 t
- LDX FC_PPU_Buf_Count Y" h; }8 w7 N
- LDA #PPU_WRITE_MODE_CNT_LINE5 N7 ]! ?$ `* r& G1 m$ f! \ z
- STA Use_PPU_Buffer,X" ?% g W8 L5 Q: A( Z5 {
- INX8 Y! P" M3 e1 j& g& x* x
- 5 X* |# a7 [8 |
- LDA #>MUSIC_INFO_POS
. D a3 z+ R2 h8 Y/ n9 b0 f - STA Use_PPU_Buffer,X* J6 K! X: N5 I- W
- INX
* j, {7 p7 P! z, S, X1 u - 8 ^$ T1 f) P) m& t3 Y) V
- ;居中8 D; v6 G! {3 D( \6 k% U* M
- LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
4 w( K4 [ O) P2 y. u \! B" x - STA Use_PPU_Buffer,X
; A# q( v3 ]; {* p; d' | - INX D @: f, M- ?1 `" J6 @. x) o
-
0 t! \' N3 R( O& R6 K s - LDA #$057 ?6 o. V2 P1 e
- STA Use_PPU_Buffer,X
; o, E7 H4 r5 q - INX% l0 J; N! x2 s p5 L4 D) p% l3 k
-
( m! J5 n- X) S$ a7 B - LDA FC_Music_Index
; y. h0 n% `! H1 J. i' B9 |* H' o - CLC. J2 e) {5 @8 E' m0 @
- ADC #$012 s- h+ h, ~7 T- T$ m: T
- JSR Hex8ToDec. e: k7 Z7 w9 k& ? e) w) }
- ) i8 ^+ e! u; i8 S2 i" S! o2 i4 @, z
- LDA FC_Dec_Data_10
$ x$ S) n2 N/ f `. } - CLC
! ?8 \1 _; z9 z- J) U( [$ D) a - ADC #'0'+ R" A# Z3 {# ^2 E
- STA Use_PPU_Buffer,X+ L |; |$ i' p
- INX: _$ W( J0 ^) p5 E# _
-
7 n5 h% _+ t1 r, W4 q - LDA FC_Dec_Data_1
+ ~- L, R2 x* i4 M - CLC
4 a. G1 [/ I( _, ^# U - ADC #'0'/ C2 O5 F/ w' m& R. {
- STA Use_PPU_Buffer,X( I$ F+ q" |. U. m
- INX
' K7 n0 W; x! I -
: U) T1 t7 G; \+ ^; G, k - LDA #'/'
7 ]' v; n% b; ? e- G - STA Use_PPU_Buffer,X
( q& D0 F" t C. Q - INX& d" P. d& O5 L6 R+ U4 R* q( w
-
: o* Q' v0 V/ p/ j5 a1 H2 Z* Q# _( J - LDA FC_Music_Max_Index
7 c' t% r6 O* s" C0 o% n: @- D4 @ - CLC, a# o3 j" H. C- J* B3 z0 [
- ADC #$01
3 b6 U- k/ l Y4 p - JSR Hex8ToDec
% K9 X. F5 j! {8 h* F -
! i w# w( p& f - LDA FC_Dec_Data_10
) J# L |1 a% o% H7 H% b! j3 S - CLC# B" j2 _8 @ b% i; W
- ADC #'0'
( y/ V+ q! n, X - STA Use_PPU_Buffer,X' B6 @6 C0 S+ d2 R
- INX
, p: c9 a. Z3 `7 [9 z - ( o) p" `* ?4 B5 Q! I5 L
- LDA FC_Dec_Data_1
& d7 B& y& i" b' f/ _( G9 l @ - CLC) | N/ W( ?2 y4 A4 y# ~1 K
- ADC #'0'% R8 J5 |, G7 |& U6 G
- STA Use_PPU_Buffer,X
# z. P: B' U! e9 e8 x% J# f - INX
6 a. ]2 S& }2 N: O, W7 h. ^ - 4 C% O8 d) h( N- L' z
- .End$ T( B& D" B6 y+ o
- STX FC_PPU_Buf_Count
9 h. i+ R* x6 {" M }/ e) L - RTS
" {$ f$ L2 C0 Q! b, N - q% m4 ^1 L5 F5 F/ H% }, P. F
- ;----------------------------------------------------------------------8 d: M. x" w; |. L m
- ;音乐曲目初始化处理5 E/ o8 k4 J' z3 i& m$ R. Y# q% s
- Music_Init_Process
" H; v- Z! ]3 e& z' K4 Z - PHA# P. A/ @8 m$ z
- JSR Music_Clear_Process
( s8 O- ], W( h4 w, `1 v7 K - LDA #$1F
* n, v# b( u/ i) L W" f - STA $4015
" C( O8 U8 Z- A" n" }# R - PLA
2 c" O- f( @7 u+ k8 ?$ w9 O - JSR Music_Init_Addr7 d' s Z- R& T( c" M1 P! ~, z, z' V
- JSR Music_Info_Display5 ?/ |& o- n5 L6 m" @$ S
- RTS
) A5 R1 w) V+ F; h: M - + E8 ~; r- J6 ]" E6 `4 v) s3 L4 ^
- ;----------------------------------------------------------------------5 R& K- ]4 B+ E7 r* F, }
- ;音乐播放处理* d, A4 V' E( L \4 R5 \
- Music_Play_Process- D$ S. O+ t# x+ y9 }0 C
- JSR Music_Play_Addr# j3 E- }- O7 ?! ]: \
- RTS- [. q/ t2 l D2 }; b$ l+ n
- + M" G6 C) @7 P' x L, v
- ;----------------------------------------------------------------------
( X% M* ^, Z/ L4 j2 u* P8 i# ^ - ;音乐播放处理 J. y2 y+ H# D5 f- ~
- Music_Clear_Process9 |0 |% k8 y# F+ \
- .IF Music_Clear_Addr
! e' c# ^' M2 v+ g4 e/ h- e - JSR Music_Clear_Addr6 a0 W9 `& D# E* y& V
- RTS
; W( L) C, f# @# k - .ELSE8 w( j# R; d) ^9 m5 J B
- LDA #$1F
+ p3 i2 E7 e6 k2 s {- ^ - STA $4015+ s% Y( R+ |. i/ H
- LDA #$00
/ { v+ @6 x+ G3 r4 ] - STA $4010
! r- b9 }7 j, `* z - LDX #$006 [' X& v! c R' n% x/ G3 @
- LDA #$00
1 P' B. o# \7 x5 \# O$ z -
" v q& @5 H2 c* s+ t - .Music_Clear_Zreo_Page_0
' i+ b7 C3 u6 V - STA $00,X
+ Q1 N: u6 T! N- f0 D% C; u8 ? - INX7 Q, e5 I$ h. U {+ D/ G0 d5 T
- CPX #Use_Zero_Page_Begin
* L C4 ]2 H; V7 V; t! {# D - BCC .Music_Clear_Zreo_Page_07 ^9 ^4 z" m5 R: y& ]4 d, V
-
* \% ]( v1 x- l - LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size
6 R8 {3 |2 j+ l - .Music_Clear_Zreo_Page_1% k h# M% O' @( q, s7 e$ W
- STA $00,X/ l# `+ {1 L3 R# [* D+ O
- INX4 j6 t& w( g7 ^' D! f" `
- BNE .Music_Clear_Zreo_Page_1
0 R: F8 ~* V6 T, _4 Q7 T2 ^6 b7 _: c - $ j( o# `$ N/ G
- Music_Clear_Process_1
3 G5 M4 U7 L- L& H - STA $0600,X2 _; Z& j) I: r1 W
- STA $0700,X
/ K8 @) {8 Z/ @- l/ ~ - INX
" B9 r1 R* |+ W9 X1 w3 S - BNE Music_Clear_Process_1+ F1 I5 Q1 P5 K; B/ x
- LDA #$10' I/ w, K+ U7 ]9 k; t
- STA $4000
3 |% y0 u& W/ D* M4 M# U' Z - STA $4004, @; I9 C* {# y
- STA $400C
( B, z; K' [, u0 |0 F - LDA #$00
4 M& g( L( m3 |& F" q2 l4 j+ k3 ` - STA $4008
" f4 x' B3 ~# [+ X5 m/ Y, K+ s% Q - LDA #$0F7 R( ]' B( |+ b* D# _' u
- STA $4015
' D, Y/ A, J1 h: \! C) V - .ENDIF' A1 ?6 J8 \- |' Y, L2 z2 B: G$ c
-
% s# R `8 \+ v1 \1 k e8 B; L) _$ s - RTS
3 B! j+ P& `0 |/ g r( ~
" E( f$ W; P) ?" W9 z7 B- ;======================================================================
{$ o s( T3 n. m! O - ;重启处理( t+ N# x1 I, [ H {/ n* R
- Reset_Program1 ?4 G: Z) ?# V! H; |3 d( U/ [
- SEI
/ b; ^3 Z/ K/ Z8 u* c0 b( b - CLD9 I# F* k- v3 Y0 U; n' ~; g7 J
- LDA #$00: u: \& V6 T% I0 g( _
- STA PPU_CTRL& _+ I( H( X# o" O; ?
- STA PPU_MASK
! k$ u/ C5 R$ Q/ Q: u - STA JOY2_FRAME
, x2 h; t1 p! g - STA APU_STATUS k, r) z1 F7 T$ G# { P$ o# W
-
0 f- o5 _0 G0 k - ;等待屏幕准备完毕) ?# j, f8 o" u" M) g8 K9 u; \6 l
- LDX #$022 o; E3 Q8 ~: Z( X! s$ [0 X
- .Wait_For_Screen_Ready
1 E* L( \: C) \; K5 e9 W, I - LDA PPU_STATUS: [7 G! u$ m. H" u0 ~
- BPL .Wait_For_Screen_Ready" T& O+ @% b- Z$ k2 b. S4 o/ p/ ~
- DEX
5 {. K0 j& h% w2 @1 ^' i2 Z - BNE .Wait_For_Screen_Ready
' @' O6 n) `3 _/ L; P F -
& x3 Q( }8 q" M" r& P - ;清空调色板8 A$ {4 R2 {- K$ r; l3 j# Y( D
- Palette_Clear
; l$ M5 s- t" R9 s1 T/ H - LDA #$3F& Z `& F7 a3 i1 R, n# ^
- STA PPU_ADDRESS) s. R! F# r, J ?
- LDA #$00
9 N; _# V* ~. Z" `; c - STA PPU_ADDRESS
% P% I* P* Q! N7 T$ A, Y - LDX #$20, x% t% W; \. z* B) Q. t2 p
- LDA #$0F
4 F/ n9 ?6 o: t8 D' J - .Write_Data
9 c$ ~" Q# G1 ]6 d - STA PPU_DATA
) b' d1 ~+ E K. b2 n% V* Y' R+ R - DEX1 k$ U: a" o$ n5 W9 O
- BNE .Write_Data: u5 D$ S7 |# o1 I/ V V. x
- ( y! V- |2 c5 _7 \8 O+ C3 s
- ;清除声音 $4000-4013/ C9 {+ T% n' r( U" X( Q1 {
- LDY #$14
5 l# T1 X4 I+ u: T3 n+ p - LDX #$00
+ n9 h5 J5 u f" ^* p6 L% ? - .Sound_Clear
, m0 l, ~, J4 V# C$ R: W0 } - STA $4000,X
' D& A& X! r2 q6 X1 H b - INX6 H3 G! j, ?" T$ u! X5 S
- DEY
/ l) O3 t7 i: A' ^/ w9 y - BNE .Sound_Clear: l, y- }" J9 d0 ?/ k
-
2 Q% h5 V3 P2 I" s9 Y- g - ;清除 RAM $0000-07FF
; w; i, ]$ f% s - LDA #$00
5 {! S9 l ~: v" n$ Q$ |2 Z5 C - STA $00
5 V/ B$ C0 p1 a- @8 F1 X - STA $01( o9 @% d( m5 |9 B: u" X/ t5 h3 c
- TAY
7 q" I r( `6 Z m+ h! L - LDX #$08
' Y9 p8 n8 g& | - .Memory_Clear
6 x6 i( Y0 i, ~. f - STA [$00],Y' f" k0 w; W4 @8 ~7 |) A
- INY
' u/ G& ?& z- S# W( C: H - BNE .Memory_Clear5 T- Y1 L; X) C$ F$ M0 }8 u" S
- INC $01' Q4 F, j, B! y: B9 F
- DEX
* r0 K5 {9 v; _& c" E* i8 l - BNE .Memory_Clear/ T2 _8 C9 i. h) D; z/ y
-
6 k- x) U8 H& @8 L - ;精灵缓冲初始化7 p8 F: [% t1 Q' k
- LDX #$00
* \. @- o, W( d v. C' I, j - LDA #$F87 z; |; R* `7 p) r
- .OAM_Clear6 S6 \: \, y: i' I
- STA OAM_DMA_Buffer,X
- t( _% s" f, `/ K - INX
& R; `( X/ Q. i1 U - BNE .OAM_Clear! Y3 O. E6 D8 ?% G
-
8 d" x2 w* k0 y - ;栈指针初始化- A/ `! U8 x, Z. o9 s4 l5 Q* X3 h8 M
- LDX #$FF
* ?) ~2 y6 j/ F$ _! C0 @ x. p0 i - TXS
* n' O; z; v2 p/ V& t - 5 o. G' L; V# a' u8 w: L
- JSR Nametable_Clear;命名表清空
1 ]( Z5 s3 i4 P) P. `' h d# K - JSR Palette_Init;初始化调色板缓冲
U3 b* e2 C8 z- Z# s3 q1 m$ ` - JSR Static_Text_Init;初始化静态文本
! n3 D; i) L6 N8 q& N# f6 J -
$ o& O& x" x3 O4 W1 r3 g - LDA #MUSIC_ITEM_TOTAL - 19 {" ]$ P7 i- M' _8 x& l0 V! ]( Q
- STA FC_Music_Max_Index, v% t) k5 F3 M7 ?
-
2 v% O- @" o7 S2 E: [ Z# J3 ` - LDA #$1F7 u) y# n" A; H1 |" F: ?
- STA APU_STATUS
5 P, K: O( b1 s: H2 I - LDA #MUSIC_BGM - 1# j' e% \( H' w, J* O
- STA FC_Music_Index
; n) K) P9 |) l8 r* H+ k* A8 `2 t - JSR Music_Init_Process;音乐播放
% F) y- h, n0 c6 Y5 ^% V/ q ?+ ? -
. `; M) U+ B; w$ S3 K - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)* b2 j& D# k! l7 X# K
- LDA #$1E
; l* J4 @3 {! w1 ~$ N7 Q2 e1 s - STA FC_PPU_Mask_Buf
8 f3 Y1 ?3 r3 C/ e -
# S8 }7 M' J9 L+ |2 a a0 i - ;启用NMI处理
6 @: C0 ]7 J0 L6 `; E - LDA #$80
, \% Z' ^9 l) Q6 S; j! o" { - STA PPU_CTRL
) W, O! _# |% y) r - 5 w* M) Y4 Z1 {( j
- ;程序循环, 剩余工作交给 NMI 中断处理' r% P" _' ~6 t2 g0 f$ Q4 F7 h' R' c
- .Loop
. v! |5 }. A& J; n2 \/ R5 v - JMP .Loop
1 N9 {! e2 M" I6 N0 M6 z5 e - 9 D- J" F% G8 p3 u6 T
- ;======================================================================
& c h) t3 z! l% _ - ;不可屏蔽中断处理
5 b0 ~1 u3 ~: V) u+ C9 | - Nmi_Program
& `1 a E; z. }- j# p& \" b7 J7 w - PHA
7 M7 [5 P1 l) v' o+ M - TXA2 r3 l$ g9 _3 T
- PHA4 q; O6 k5 h: I5 h/ }
- TYA
% [( B$ r" m' A# L% e$ ` - PHA
& q% j1 s. i2 D/ F/ N) q# t -
! V1 K" i; @% m! u" W- b3 `6 w - LDA PPU_STATUS;读取使得 PPU状态寄存器复位
0 K# X! T7 B9 _( D: V8 u) m -
8 ]" @" v1 x$ I$ V( }# M* S, j - JSR FC_PPU_Procrss;PPU处理
: ?! o, [- Z/ K - 8 U! T+ O; m1 a
- ;精灵内存更新7 N( u. Y" R1 X3 {+ u' J2 F( U
- LDA #$00
( t. q5 \! F6 Y% R; |+ A4 \* @: Y - STA PPU_OAM_ADDR2 c* x2 V' {) |/ W5 @4 w
- LDA #OAM_DMA_Buffer / $01003 m' T* Z/ g( Q4 E5 r/ L
- STA OAM_DMA% s$ u6 t4 K' N9 }6 G3 w
-
$ ?, T% R& ^$ ]+ n - JSR FC_Gamepad_Process;手柄输入处理& W: \" {, t8 E& Q& x% x1 G' H
- JSR Music_Select_Process;音乐选曲处理
$ S9 l9 A) ]" u+ J* [0 J - JSR Music_Play_Process;音乐播放处理
/ O; s3 m" p9 ]' } -
2 C0 W# C# o0 u! L1 s8 T - PLA
. f9 A# [' p, A: B; F+ B! ~& \6 [ - TAY+ N/ N' ^! ]( _' _
- PLA9 L, L+ {# r6 k8 T8 U2 t/ U* _! \$ e
- TAX
2 |/ I& Y* `; _' s4 r; ]2 M - PLA
# o% l5 y* V0 F& p% n - 5 ~% d1 | [$ D0 K. Z2 E& l
- RTI
$ |: R% Q( x( z) L
0 h+ F' G, `6 k- ;======================================================================
- }. R- a: n' Q' Y - ;请求中断处理* R' y) ]. h' o
- Irq_Program8 L0 P1 h8 O4 t7 G# k! i& U
- RTI
+ }" Y+ v0 H0 J# V7 O6 N8 B - : m r! l4 z! E G% [" E
- ;======================================================================
/ O6 S9 V$ J7 }: [8 M - ;中断向量表
% q, V2 [3 l+ A" C8 I0 n4 D - .ORG $FFFA% H# p5 N3 Y$ k$ H7 A# ]% C
- .DW Nmi_Program ;NMI触发时执行! V8 W3 }- ~0 @' G5 n
- .DW Reset_Program ;载入ROM时最先执行# F1 L3 Q; }( ^/ m) n2 n; G, w
- .DW Irq_Program ;IRQ触发时执行
+ n6 ]5 Z- m, I, p0 Z1 v& R
复制代码
8 g `* V4 p' U4 u! e) h" ~
$ i; D: j+ W7 w& }( U5 q4 P+ |$ E1 }
& [3 Y% _6 f/ K5 d4 nhttps://gitee.com/flame_cyclone/nesasm_3_2 |
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