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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下
4 l5 ^( L& m O. s$ v4 |( I. F . n2 M- R. {6 c' z
以下是主框架代码:
. }+ L* ^" U/ H& g. N0 a- ;======================================================================3 k; V( n9 O( {
- ;文件头
% t2 w3 ` E1 I; D7 D; x - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量
6 U, e8 Z! b/ [# h0 t - NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量! v( B$ c2 T* n7 A8 m- m5 D
- BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码
7 K, [+ A6 `. P/ I' W1 k - ;======================================================================
; D: Q! _9 y+ ~7 n5 D* T o1 M9 j - PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2- s# w5 [$ T# I+ n' u& U" O% z
- PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1) ^' v4 h/ ^* J# y
- ;======================================================================; Y2 P) v' }! D. J: _
- RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
: l2 i) A. `: R0 u3 U - RESET_ADDR = $E000 ;主程序起始地址
7 V% A- G6 h& N/ [6 @5 o5 u# z2 ` - ;======================================================================+ O, }6 G4 E4 H) `! P# y7 q
- .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB! k6 Z) i4 [0 K0 p
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB# f9 \! z$ ?8 v, I; [: H$ E
- .INESMAP 4 ;Mapper号 (0-4095)
. z; ?! }/ m. ?) z5 F, e - .INESSUBMAP 0 ;子Mapper号 (0-15)
- C7 S. D/ V, S' n# r% p' ]/ ~ - .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)! j3 a0 E/ V6 U4 U8 e0 B4 V
- .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)
5 X3 X5 E8 S% F# \) N5 m$ Z - .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)
$ |& S; V3 c# v2 ? - .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)
' Y# b. l4 k* X - .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)% F7 }% w" A3 E, k5 Z5 m* `. j
- .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)
3 E" ` e# X! \0 O0 a; s - .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy): V: J, ^1 L3 c0 \5 n* M/ E
- ;======================================================================
4 W) h% f; | t9 O5 d3 K0 J2 i- g - .INCLUDE "fc_demo_config.asm" ;全局配置
4 K, W7 {* v$ |7 L# p - .INCLUDE "fc_demo_constant.asm" ;NES常量
5 y; z. F* t5 z9 G) ]4 q, X! I+ r - ;======================================================================
5 A2 e& P, J' \2 r& c; ]% s - ;音乐配置/ Y6 s8 k. T3 W1 z& Q+ H0 L
- .IF 0 = MUSIC_THEME
! Z& G. y5 v# L! a9 o - .INCLUDE "data/music/Gremlin 2/config.asm"
1 x: O _8 A4 D9 C - .ENDIF! p% S- ~, l7 n+ x3 y/ x
- y9 C1 K- }% {" {4 m* u% ]
- .IF 1 = MUSIC_THEME
6 ~2 g" A* I0 H: o - .INCLUDE "data/music/Raf World/config.asm"0 Z- S3 a8 x" ~+ c# A% T4 v5 W
- .ENDIF5 i7 H4 s, [5 P# @8 d% c
- # j/ W- p; u: L k7 E }3 t
- .IF 2 = MUSIC_THEME
# D2 _& |/ \/ f% ?! e+ M - .INCLUDE "data/music/Ninja Gaiden 3/config.asm"0 g2 }2 z4 d8 b' K4 ~1 P$ C; R% \
- .ENDIF
3 Z9 {$ \/ j" B4 _1 a5 |- N - ; I5 }/ H6 ?. O* B+ y
- ;======================================================================! s: r& X; x8 M# f6 k% I: g& J
- ;引用CHR图像数据6 z) T5 d. S# j8 S
- .BANK NES_16KB_PRG_SIZE * 27 L+ C, U" k# G$ r9 E
- .ORG $0000( J9 ~4 M1 Y9 T2 g( L
- .INCBIN "data/bkg.chr"
) s9 S, U) O0 X0 g% q4 A4 G3 c% i* w' I - .INCBIN "data/sp.chr"2 r) _) _! k4 b; ]$ }
- , @4 I! Z2 h: T2 i) g5 ]
- ;======================================================================5 J8 `9 I' G6 V* p0 }
- .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank+ o; d( X8 x s& O/ O
- .ORG RESET_ADDR: h% F" i8 I0 ?8 F, T
- ;======================================================================+ n6 |4 f( R3 g4 Y- m* h3 F! j
- ;引用其他源文件# }3 F8 ~& C1 e
- .INCLUDE "fc_demo_ppu.asm" ;PPU处理- R6 y( ~4 f, q" J) Q7 B& m
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理6 @; t# t6 Z" ?9 h3 p8 e9 ]3 F. j' {
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理 w) N. u- o; ^! Z# c9 x6 o
- ;======================================================================
! t2 d9 }$ I1 R/ }& C - , T9 i! ^8 M% e7 M1 {. _8 S' ] B
- ;======================================================================# U1 }6 [! o' J
- ;等待VBlank到来1 e6 l4 R) T1 r# |! t. \# j
- Wait_For_VBlank) S3 ?$ R& R8 ^. o0 B+ r
- LDA PPU_STATUS1 e; S$ \8 O2 Y: e8 V2 \
- BPL Wait_For_VBlank0 p4 p7 n2 G9 g- j5 y' j2 m( o
- RTS
) s/ ]( _) r. q- C" F
6 H3 |% @+ g k s3 P- ;======================================================================
7 |& B' X N" a i; v4 L - ;调色板初始化$ X% O6 f, J' G3 y
- Palette_Init
- T% n7 x4 K, r6 {7 i# m - LDA #$3F* s' s/ Z. _( @9 u
- STA PPU_ADDRESS
% P1 m3 i0 {. r5 O - LDA #$00
( |$ U/ i3 P7 z1 _2 A* W! S - STA PPU_ADDRESS
: u" X" f7 Y: m0 U5 a5 Z - LDX #$008 O+ |" G1 x$ Y* U# m6 @# G+ @; X
- LDY #$20
4 }! p7 k8 u7 N& Q' e4 s+ x* w - .Write_Data0 a+ |/ L4 x1 n0 b
- LDA Palette_Data,X9 }3 @7 l5 q5 l! B: R8 V6 B/ @7 }
- STA FC_PPU_Pal_Addr,X
' d' u7 s0 o7 k* ?( o. q5 H - INX
o) ?0 J& k5 D3 F, e; c9 P1 P7 m0 N - DEY, x$ ~$ d( R7 W: R# y
- BNE .Write_Data) M+ ]* m6 K6 V5 f! ]- ?! b) k
- .End
1 r4 Q q( |* s& L5 [" P! E - RTS
' Y9 \8 v. X8 O( f+ K5 ^! J - ; ?& f9 J, M# A% L% a- H" h( w, [% X
- ;----------------------------------------% g( n& ]( _0 s
- ;调色板数据4 e$ F4 |# v7 s/ j2 d( u! C" I
- Palette_Data; M6 j3 F$ }3 p
- .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B% t) Z- |4 R9 s$ h: e( M
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 229 E' @5 \! h `' U5 e$ u- m
- 2 X: _0 q" r+ O- R; e5 m5 o
- ;======================================================================
% F6 e9 ~' J. o - ;命名表清空
# h# ?; d- O( P/ a* d; g - Nametable_Clear
- ?, K4 A* u7 e8 B8 |% T - LDA #$204 [( l w) l2 M g& S
- STA PPU_ADDRESS; U8 E5 G9 ?- N* C
- LDA #$00
& h0 f7 I+ D8 Q: H5 C8 R7 i - STA PPU_ADDRESS
9 b: r! @/ W) L - LDA #$00 p( h9 a6 m; R- K) |% _' \
- LDX #$00; w& ]5 H4 ?9 t1 \2 y
- LDY #$081 ^* G0 P" E! G2 M1 v" f% T
- .Write_Data
/ F3 X) O$ p7 V7 ?- S% T! {% W - STA PPU_DATA
, ]/ `8 \* Y0 K7 p4 Y/ U* d3 k - INX
+ [+ J- T0 c6 E# j* H - BNE .Write_Data& I" c1 O* D: d7 \
- DEY ]/ p: \' V$ |/ _4 D+ s/ n
- BNE .Write_Data
) \- p3 X L+ P; M" B5 o - .End
, T1 V4 ^. n6 n5 v4 k5 B/ v9 g - RTS
4 _9 [7 i5 Y; z' P- t - 7 o. V4 {& D2 L- a- ~; ^8 E
- ;======================================================================$ ~1 z L/ K3 `8 |% S+ |1 n
- ;音乐曲目切换. ` _! ~ `/ J# u7 ` }& N
- Music_Select_Process
- ?6 P# J1 z3 n) t
" y& E, u0 v2 g- .Pre_Music;上一曲
+ g7 l C0 |! {6 Y- n - LDA FC_Gamepad_Once% V8 u, f) h S+ ~
- CMP #JOY_KEY_LEFT
/ [, E& V) ^- z z/ p- c1 @& i: _ - BNE .Next_Music2 _ j- i0 N* m5 S3 r1 R
- JSR Music_Play_Pre& \+ P2 x. D K
- .Next_Music;下一曲
! ~' Q3 V) u( X" N; j - LDA FC_Gamepad_Once, }; S+ w" j3 H" Y5 o8 v7 `
- CMP #JOY_KEY_RIGHT: W( }4 v5 o6 y/ I: }7 y( F
- BNE .Next_10_Music6 Z! i7 ?- D0 k9 T
- JSR Music_Play_Next' o2 o9 n1 o. h) K
- .Next_10_Music;上10曲) c; w1 I' {, m; b% l0 S3 @
- LDA FC_Gamepad_Once2 q9 J1 |% t( i' S& A; b& t
- CMP #JOY_KEY_UP
! A. P4 Z, q; b# u) F( k+ Y* M, T - BNE .Pre_10_Music
/ y6 p( z' u5 @! z+ {6 U, N2 T - JSR Music_Play_Next_10! L- G- u U( }7 N' w h7 M _4 Y
- .Pre_10_Music;下10曲
O0 a5 ^0 K/ U- e" q1 q% u3 N+ y - LDA FC_Gamepad_Once
# o8 h: ^4 s) N! V - CMP #JOY_KEY_DOWN) E0 V' u% E8 k5 K7 C% P9 d" g- Z
- BNE .Reset
) R! n, @' i2 @8 i5 E) T - JSR Music_Play_Pre_10
4 I4 p2 I2 b" E+ ~. ~ - .Reset;重播当前曲目
9 G5 W/ k* t8 s" Z( Q - LDA FC_Gamepad_Once4 {# P1 u2 t; q) E) S
- CMP #JOY_KEY_START2 x* L) V. Z" [+ H
- BNE .End3 x7 j' ~0 E6 u7 q
- LDA FC_Music_Index
1 {$ h6 a, {$ X6 ^* X% J z - JSR Music_Init_Process
$ p+ H6 O5 I9 _1 w" _7 ~ - .End
" S- g+ h* |' B" N) O& r - RTS7 ?! x% p- H' j& C3 I: W
- * Z5 x5 q* m' E( {% P R" K! A# H
- ;----------------------------------------------------------------------7 d. N$ e" o2 P: u& D9 J' }2 ?3 A
- ;播放上一曲# S/ x0 f# z' w2 t) `% p
- Music_Play_Pre& u' O& C+ v+ v/ F, v7 X& Q9 N
- LDA FC_Music_Index
! a8 u2 @ }- F+ S4 Q# _ - BEQ .End
+ g# b Q: i$ C: s( I - DEC FC_Music_Index# h0 P3 q6 o6 I# @6 y7 N$ G q
- LDA FC_Music_Index4 I. e/ e' n6 L3 \6 A2 A
- JSR Music_Init_Process* h0 _4 ?7 w/ O% L: |: I, ]( f1 @
- .End, s$ b& R9 P0 j t
- RTS0 v) P/ G. j: q
- ;----------------------------------------------------------------------
* T5 i* \5 {6 z; ~# [ - ;播放下一曲
$ x& J; Y+ a8 S& Z- U5 B% C - Music_Play_Next
! L4 m9 V1 H2 Z7 t1 w' y \ g - LDA FC_Music_Index) A6 r- o1 u; p2 ^' |
- CMP FC_Music_Max_Index
% f* Q" y! O1 d5 R) X4 t - BCS .End8 y/ u5 I$ F/ c3 G
- INC FC_Music_Index! z$ z" Z, _7 ?$ g$ h" c
- LDA FC_Music_Index
/ s/ D' z3 |; G7 x - JSR Music_Init_Process% c& p0 d' T' b) G
- .End
5 Q8 z% E6 O- b2 }/ C& Q' Q - RTS
' x K: m t" K ]" _- q- Q4 e - ' `! G; d4 ?2 V4 C) I1 c# U9 @7 i
- ;----------------------------------------------------------------------
" T) B$ L9 d' V% c9 Y - ;播放上10曲
$ k' _+ |/ R- [5 w' c% |9 |, d5 L - Music_Play_Pre_10) W/ h' X& w) r( v" s g
- LDA FC_Music_Index- v4 C3 S( W5 e E+ D7 H4 R3 v
- BEQ .End7 T( ]0 y7 z3 L' h
- SEC
m. C# J8 g k: O `; Y - SBC #10# i5 B( `( ^! N, [% F
- BCS .Pre_103 O8 |: y( k* K- H) ]1 r. @
- LDA #$00) w1 u* o& [) I( K0 r% Y
- .Pre_100 b h% ?( m8 t& o
- STA FC_Music_Index
# f/ F, b) @7 e8 Q: q; n) n. ~ - JSR Music_Init_Process/ c* o3 J: W+ `9 Z8 v& E* f Y' w
- .End
1 i( y7 ?- Z9 F; q, _ - RTS2 x& B/ X% d. c$ I2 @, S
- ;----------------------------------------------------------------------3 K5 u5 M* ?9 z* \
- ;播放下10曲; \2 r J3 ?. G8 A. R
- Music_Play_Next_10 {5 G8 [* `/ ^
- LDA FC_Music_Index% Z ~2 y* X6 B2 a7 `% ]; S7 \% z
- CMP FC_Music_Max_Index/ A# K" _, g% |! L0 m0 N( e$ t
- BCS .End7 X3 n1 L2 d) w+ F. _' Y# {
- CLC
& w B; N4 `# h - ADC #10: c4 D% d6 t4 o7 c
- CMP FC_Music_Max_Index' z2 N7 p. p/ l9 d# ~
- BCC .Next_10, V* c$ i7 r8 ?$ c7 ]: d5 [6 G5 A
- LDA FC_Music_Max_Index
( w5 i8 l$ x2 _/ A5 ` - .Next_10, k) _2 F, w6 ^5 k% ~) A6 z. d
- STA FC_Music_Index
# @0 [ X" t+ Y% u+ O6 g - JSR Music_Init_Process6 {4 Z' F" \) t6 J: E5 m
- .End
9 x' Z/ R4 C' s3 z7 e+ z8 l - RTS$ E. K7 ?3 t+ s0 m% E+ v" _2 d5 a
6 v2 R* T9 \$ H) M$ `$ f2 Z3 o- ;----------------------------------------------------------------------! |7 J5 k+ C2 v: O0 B& m! V
- ;8位十六进制转3位十进制制
# D% h! p, i! d) b$ g; _ - Hex8ToDec
$ o0 T1 X# U9 E' g - STA FC_Dec_Data_1
. D) w, x# c' l: U - LDA #$000 _' T% w1 v# \* U" ]
- STA FC_Dec_Data_1008 n8 I F8 g# g. T+ Q3 f, Q# E
- STA FC_Dec_Data_102 Q) T n/ Z0 N3 {
- LDA FC_Dec_Data_1
$ d/ H# N2 l$ e$ o - .Convert_100
& K$ X( w; N. F% r! S0 l( R- |) u6 d, L7 Y - CMP #100+ C% V) J% f0 r% g: G
- BCC .Convert_10
0 B4 m* i, `; r# C# n9 C- u o - SEC2 c; l& n2 {) y; \2 S2 E
- SBC #100
( J5 c4 x) o! k8 ?; j$ K6 b - INC FC_Dec_Data_100
. f2 S& t: B7 u8 w - BNE .Convert_1005 O- s8 y3 L) m8 B( u9 N
- .Convert_10
9 l2 N% ?$ Q* E - CMP #10
% J% X1 B+ [1 Y - BCC .End
! Q& c: B. }# N - SEC
5 ^" I- {) F( M, e# e* R# f2 y - SBC #102 z% ?2 C5 @& @! R# o/ ]
- INC FC_Dec_Data_10* E( B0 k# U% ~0 V3 L& i
- BNE .Convert_10
2 f" m* `$ f1 ]2 S - .End
1 \/ \3 z# i* v; \; L/ J' E - STA FC_Dec_Data_1
3 s( Q! T3 Q* n9 m+ b9 F! ]. m) j - RTS# O9 B- V7 @. L z+ {
8 K! d7 `& @& \4 t% }- ;----------------------------------------------------------------------
) J% J) Q+ |3 E+ T3 l: L3 u4 L - ;显示曲目信息: W% ^5 Z# Y1 G3 x% i: P3 {
- Music_Info_Display( I" J w* w6 k8 a
- LDX FC_PPU_Buf_Count1 Q( s+ b$ p, A8 f. i
- LDA #PPU_WRITE_MODE_CNT_LINE
" e4 W& {( O2 H+ L - STA Use_PPU_Buffer,X# P* @# O5 C f1 r3 o" z- o- _
- INX3 j( }# O+ Y4 r; q# l, `; c e0 D
-
u \' O( C; h* }9 ~ - LDA #>MUSIC_INFO_POS
; N# t/ Z+ I2 j+ e - STA Use_PPU_Buffer,X
6 D" V p+ |; N+ j; x3 w) |' ~, F! q - INX# u6 A. @3 A+ K! G# Z8 p$ s+ n# W
- % d; G! q! o7 k9 Z4 @: A0 }6 K
- ;居中3 i$ ]6 e8 o8 X! h! u
- LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
4 L& {$ a. ?- ?5 z0 \ - STA Use_PPU_Buffer,X
8 o+ ?4 \. d# U( n% l3 t - INX
# r4 v0 ^+ B) z1 ` -
& C: C: R9 V+ k1 _. }0 c- p - LDA #$05
3 y" ^3 V2 _1 g! R' i - STA Use_PPU_Buffer,X
& s9 w# }+ Y7 @; A: i4 ? - INX
/ k; L4 C. X7 C8 F" h1 }2 Y0 ] - 5 z$ q) P; D& M4 |+ C4 Q9 \
- LDA FC_Music_Index j' ?' v# H- @+ r6 _% ]- r2 c
- CLC5 K) d# ^) L4 Y; u3 y" V, z/ r
- ADC #$01
, |% d- T8 e7 y9 G - JSR Hex8ToDec' i" \1 j/ {2 r" [
- 8 W+ M0 `$ Y4 i- ?4 F) q) [2 u
- LDA FC_Dec_Data_10% U- @1 [ ^8 A$ I8 r9 S
- CLC
% W* S/ B- O; T& K% @0 O - ADC #'0'
. b% W# [' j& t3 f1 o' | - STA Use_PPU_Buffer,X
. K3 @' {2 g* f% E/ J, J - INX
# g |* c" Z# j, `9 O. m- z H- ?8 q -
: J! G1 ~- O! r/ h( d - LDA FC_Dec_Data_1) P; e0 J8 \5 s# P
- CLC
$ c# D" m( Y$ q3 t - ADC #'0'1 b7 O- v7 j Y: ] k- {
- STA Use_PPU_Buffer,X
4 x4 o [$ b% l! A: l: c - INX; Z" E: g; o9 v2 H, A
-
( N g9 N$ L+ T7 E - LDA #'/'
% ?1 i5 u( G6 f) D - STA Use_PPU_Buffer,X: F. z5 e$ w( R5 F( u" i. z6 {$ z
- INX
( B: U+ o& e f/ c" S: V - ) q$ }/ r3 R) R) j3 H, D( U5 M
- LDA FC_Music_Max_Index
, G0 t1 z) V1 Y$ j. f4 a) z0 | - CLC
4 q& F; m& m- j0 s1 A - ADC #$016 u7 e6 A! E$ s$ B X# O
- JSR Hex8ToDec$ C: }* p! d2 M: L- `) {
-
0 _" P* b' c8 L4 H( { - LDA FC_Dec_Data_10
9 |& z7 ^+ _9 r& Y1 s0 ^ - CLC, T* q) N* \6 A" G: H+ b
- ADC #'0'3 ~! ~. U9 f' f) Y
- STA Use_PPU_Buffer,X: H/ O$ I% ?( s# s
- INX
% ^8 f% @2 g$ Z: q- h3 D -
& Q: h" E, w; C - LDA FC_Dec_Data_1
% _* O; Y! p, R% c - CLC
- h2 C f$ Q, K% E - ADC #'0'
8 N/ z, Z& ]% d- l# e( J - STA Use_PPU_Buffer,X
" ~+ o7 G) b. `! M# j2 E - INX
4 U8 l$ r* F0 w9 Q - # B. G+ Z; }/ e' M: o* I
- .End: [7 y3 [" J1 M- n: @% Y. l
- STX FC_PPU_Buf_Count# ]2 I3 ?& O5 g
- RTS
' U8 [. R v1 s3 b1 d; t
8 T" v1 z6 Z. ^% _- ;----------------------------------------------------------------------
8 P4 R" |, d/ {& N' v x7 Q - ;音乐曲目初始化处理0 Q: N' [ ?/ x# h; ?
- Music_Init_Process
- ^. }) E# v+ y7 j* R$ | - PHA+ R* }7 M! `- c" L: U! I: u
- JSR Music_Clear_Process! a/ d& C: F, g: n* v
- LDA #$1F! `: c% P" ]7 f0 w
- STA $4015; r( s8 N1 P w' n
- PLA
2 N$ N" Q# O6 \2 A3 D V - JSR Music_Init_Addr
- `4 M) f |) `! H - JSR Music_Info_Display; W5 Y; a9 L0 w% y2 k
- RTS
; _& x5 B- ~+ [" G% \' b" Y# P - 7 n/ P* Q4 G6 k$ x
- ;----------------------------------------------------------------------) _0 V8 Q7 h( s
- ;音乐播放处理
! A: D$ V( H& B0 T5 } - Music_Play_Process
4 ?( {% g! D6 Y. j8 M- [ - JSR Music_Play_Addr6 U' Z' }& P% _% z! e/ B2 h
- RTS0 \$ p6 q7 ^, o' g8 w2 H
3 E* b8 H1 k( o! g4 B; C- ;----------------------------------------------------------------------8 z# P1 d d$ u6 [0 z
- ;音乐播放处理
. |7 |$ o# m+ U$ [ - Music_Clear_Process, T3 a: Q% J1 w+ n2 q! m
- .IF Music_Clear_Addr
; @, N7 ^ N# \7 @- q) m( S - JSR Music_Clear_Addr7 I7 G. m. F4 Q0 [2 m* Z
- RTS$ q I. r' `/ e( q9 P7 ~1 i) I
- .ELSE
) `4 ], A: D- i1 ~ - LDA #$1F
* o5 ^7 X6 e. F3 Q) c4 a - STA $40157 s9 Z, F+ c+ l* y2 Y1 ^
- LDA #$00( O* V6 f- A2 X- l# e y9 U
- STA $4010) Z1 X% z \7 ]1 V6 y' Q
- LDX #$009 H5 a/ E y7 r% l
- LDA #$00. s- f4 ?* R4 |$ a4 }0 ^
-
; R4 D. X8 y# [; [ - .Music_Clear_Zreo_Page_0& q) L9 y: J0 N i9 k
- STA $00,X6 o5 ~0 [! Y2 N; f& }) _
- INX
$ q* v/ j& L: H" m9 J" X% L - CPX #Use_Zero_Page_Begin& X; ]2 m- ]9 a5 b7 p
- BCC .Music_Clear_Zreo_Page_0! C; P! ]# }$ g% A A
- % J$ n; h4 v% n; h- @ g5 e. r* h% V
- LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size
8 Z9 b R f% |3 S5 s: w; ]* o, W - .Music_Clear_Zreo_Page_1
3 J+ g) P, y! H! e8 C% Y - STA $00,X
, K \# ~9 Z8 E+ y' }- S - INX
% J- u. \! Y' U* H. v# W' E - BNE .Music_Clear_Zreo_Page_19 a# s+ ~8 y) ^; J9 V! j$ |/ A) K
- 6 U" S% K5 w4 t9 F
- Music_Clear_Process_1* p3 E2 o6 S" _% o
- STA $0600,X
/ g. I" G) R v& i - STA $0700,X
' k1 c1 V* R7 Z7 O - INX
0 O2 Y& b9 K2 p. c - BNE Music_Clear_Process_1
( \' j; H) r% ^3 F - LDA #$10- q, M, p6 Y- _+ q
- STA $4000
; c U' d, _5 F% C2 t1 d - STA $4004* {+ z7 t( ]7 f- @9 y1 G- \
- STA $400C4 S P% Q# R* m' r- O: I# z t
- LDA #$00# X* Y# |2 \' H% s
- STA $4008
4 W& n. f; o u' k; u) r - LDA #$0F
" k/ |# j9 r t - STA $4015
: |0 e) W1 s" J8 ^ - .ENDIF
# [/ |+ k& B9 V6 d) m8 q - & I( V1 f( j, z. Q4 P
- RTS
/ E' M& x# w7 F% g" C g6 f8 `9 Y - . @6 U5 ]$ |4 ~$ q
- ;======================================================================
- e8 W. b1 I# l2 ^, q: \; o - ;重启处理1 E* T# V# n) C5 {+ K* h/ U
- Reset_Program
4 m; f1 G& k! _# N0 }" z - SEI2 G! B/ J a* c# X* z
- CLD
) n$ c6 ]4 \& J& `, I( a& `. t - LDA #$00 ?- E$ ]# T& ~* ~( [$ N( g$ P2 f
- STA PPU_CTRL* d/ m' [- F: p, O
- STA PPU_MASK
: E& O& f0 [9 M0 G - STA JOY2_FRAME. k% _3 h' C& t
- STA APU_STATUS! e" @& U! s% Y+ a+ X6 e3 B
- # G2 {5 |, U+ K X7 T2 B
- ;等待屏幕准备完毕 r: k7 {9 W4 ?2 Y
- LDX #$02
; @& G: u2 |- V3 q - .Wait_For_Screen_Ready
6 F3 {& ]% Q' z" ~1 o - LDA PPU_STATUS. g. R9 E' i0 x. ~+ b
- BPL .Wait_For_Screen_Ready$ B# W; r* X$ d) L" f$ b
- DEX! w2 E! c' L4 h" a. |" p
- BNE .Wait_For_Screen_Ready
) N5 A! P2 Y8 ], G, L - ; v! Q$ b$ R) R/ \! w2 Z5 E8 F( z
- ;清空调色板
) N% n1 h! U( V/ B3 S# W - Palette_Clear5 H" Z, N0 y, k+ r' m4 a3 j: T+ C% T
- LDA #$3F% D: X) `0 q- @
- STA PPU_ADDRESS
" @" q( I. y0 l. B - LDA #$008 p' A$ k4 [- s+ c$ u0 | s
- STA PPU_ADDRESS4 `9 @# a8 C5 V9 }3 ?9 _) C
- LDX #$20
: u$ J9 Y" J8 Z8 U( Y: j* } - LDA #$0F
: B9 k1 Z/ h8 U8 o; y - .Write_Data9 w3 r$ M; M% b) d) e
- STA PPU_DATA& [0 ~. A4 K5 k/ b* A- r' `5 | g
- DEX
6 v& S, s: x! q3 C9 ?+ b) W - BNE .Write_Data
( |0 z0 @2 o4 X; ~4 G: r2 j - ! v( j( l# L; f( s) j7 H6 O
- ;清除声音 $4000-4013
+ J) F2 _" R3 d2 j - LDY #$14% v3 `7 B" f5 g i
- LDX #$00
6 i' f1 ?+ i% Q- z, Q - .Sound_Clear
" m' ] ^( S1 { - STA $4000,X; Y! I6 X& _ P
- INX. k0 H. z: X# |6 O) m" h. B# Z
- DEY
" e/ D$ R" v3 `) | - BNE .Sound_Clear
# m' Q9 n9 {, K3 m+ R9 ~ - ; M4 K7 W+ f9 z/ }
- ;清除 RAM $0000-07FF
* O6 ?0 z, u% V5 G' x1 \) ^ - LDA #$00
i2 e! n( i8 N& j+ v - STA $006 T5 b( n! p' a" {3 i6 b2 ]
- STA $01
) B) H; Q; g* ], l# Z% j - TAY j# J+ N2 P& F$ X% d# L6 F6 t
- LDX #$082 m9 B% \+ E( i2 H
- .Memory_Clear
( v3 o$ K8 Q m* L. C - STA [$00],Y7 ^* y3 g1 c* q* H0 H; m2 d0 s+ L
- INY
# p' j3 K$ R1 Q) b5 U% ` - BNE .Memory_Clear+ O- Q& I1 I: h. _
- INC $01
. `+ u0 _& b+ H9 c# I - DEX
, }. Q$ C3 z' k4 z8 _# p3 ?' ^4 f: d - BNE .Memory_Clear4 r% b2 e! q2 O2 ~6 n( T! s0 H+ \7 i
-
1 {5 W5 a5 f) x8 Q F - ;精灵缓冲初始化
' ]* i- m2 M6 O* W8 ^/ ` - LDX #$00
K; S/ q* s! t( X& H4 ] - LDA #$F8 @8 S% {1 D" `0 x' M: T/ z
- .OAM_Clear- b5 _; X9 y' G
- STA OAM_DMA_Buffer,X+ }: f' w; ~9 Q }4 g" E( ~2 X, A
- INX
' h0 l7 i) Z) Y. V - BNE .OAM_Clear, [3 U1 P* R* u
-
8 R6 ~5 ?7 R$ k ]5 [5 x/ B* u - ;栈指针初始化
+ N% {3 Q* z9 p0 k" j - LDX #$FF
8 e" V9 C- ~& y* S - TXS2 E) R S; f; b& [# _
-
- f/ V$ c+ |8 C - JSR Nametable_Clear;命名表清空
! u8 D k8 T/ x3 `5 n0 ^ - JSR Palette_Init;初始化调色板缓冲: I4 M1 y% z0 T. O
- JSR Static_Text_Init;初始化静态文本
$ }5 h* Y' b+ p+ Z -
# ?* e R" g8 u - LDA #MUSIC_ITEM_TOTAL - 1
; t/ f' d8 G3 u3 @! n2 ^& M5 a - STA FC_Music_Max_Index
" q7 L f2 y7 | V0 E - ( F1 x8 V' t/ ]4 z7 {
- LDA #$1F
% j3 Q2 D- c9 x( v( h9 w8 S - STA APU_STATUS" j* n0 [& Y. s4 T" b
- LDA #MUSIC_BGM - 1
& {6 [+ h/ _: k - STA FC_Music_Index
( e/ I2 K2 o* M6 }3 q4 Q - JSR Music_Init_Process;音乐播放
# X5 l5 f3 k& \; y6 T - * ]. B. c2 d7 H' R. ^" [) R, V
- ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)6 N* {1 j9 k. o3 l: n9 s7 r; O3 `, f) R
- LDA #$1E
2 M2 h7 c! }/ D - STA FC_PPU_Mask_Buf
, H* z4 B6 U# h1 _1 d/ a+ N - ' |. }+ E& N4 ^! `. b- ?, X& p9 d
- ;启用NMI处理9 K! H9 ]& U6 ?
- LDA #$803 k& z4 b7 i) ?6 w4 a' E
- STA PPU_CTRL8 d6 L' c( E5 V
- 5 c% D, g+ c" f% V# Z5 D
- ;程序循环, 剩余工作交给 NMI 中断处理" `' G3 Y5 ~, N' n6 S* _
- .Loop
% \. C$ A- A' F0 X3 M. A" i! X# i - JMP .Loop: Y# Q6 `- V4 J- u) f" m
u7 S& e" } K. W" f& P3 q3 a6 s- ;======================================================================
: X$ X: d8 l( n# u, K0 h' s+ }' T - ;不可屏蔽中断处理8 @8 _, R( ~, G" I( R7 O
- Nmi_Program- P- S% J. W+ j6 b# i$ |
- PHA+ w6 L6 L1 V& i; H
- TXA e/ k, S& d* o8 K/ ]* u2 ?
- PHA& c! L8 \$ _; B9 E
- TYA
4 l' o. r/ |/ I- ]! M - PHA
) U- A8 R7 Z. s! T: f( V- C -
; D! i* ~' t v8 x - LDA PPU_STATUS;读取使得 PPU状态寄存器复位4 {8 G* Y0 g* Z$ t" B
-
# ~4 C& a6 d; V+ V - JSR FC_PPU_Procrss;PPU处理7 E% R3 T) Q9 c1 f+ N# ~
- & J* O5 m) r8 N/ M
- ;精灵内存更新& Z# i5 y; f1 l! d9 N. W) f
- LDA #$00/ Z. s# |9 _4 J8 H1 ]) _' L% @: U
- STA PPU_OAM_ADDR
2 y3 C5 M8 @! y+ p4 N' t7 t$ y0 G - LDA #OAM_DMA_Buffer / $0100
5 i( \3 R( Z [ k# R1 T - STA OAM_DMA
7 y6 F! o5 b! p4 e - + m2 b' W( x" S3 ?, R
- JSR FC_Gamepad_Process;手柄输入处理. p, Y2 Z6 F5 b7 G4 }
- JSR Music_Select_Process;音乐选曲处理
6 V6 g5 [1 l4 g5 n% r9 u7 b6 z - JSR Music_Play_Process;音乐播放处理' h. o! m/ L$ u8 T- e8 h
- $ P* r; ?, ]$ Y' K
- PLA+ u% N' Z. B/ e; Y( l' M
- TAY
3 P/ L+ H7 h* V7 \! S - PLA
" R) l0 y# F: N) p& G- C$ B" V - TAX
3 g5 O0 v( m* w2 P4 H - PLA
Z- W4 n8 [+ g! ?. k; V0 y - + w+ s5 q& q4 S7 `
- RTI
9 w* x9 y: L% ?2 ^ - / L' ^: M) `/ p2 K: N
- ;======================================================================7 w) t- e* A/ I; A% R- M: y
- ;请求中断处理9 Q& [. @- W0 Q# u; G
- Irq_Program
; F6 N# F, `# e$ G. ~& a w - RTI
" I: _/ C! J( s F5 a - 1 |3 H% u& p2 o5 ]1 F$ s& N
- ;======================================================================
& e) z8 H+ g* _7 O - ;中断向量表 ^. e0 R0 d2 D
- .ORG $FFFA
1 j6 _' E+ |# e$ L. O9 W" i - .DW Nmi_Program ;NMI触发时执行
: t m+ f( `8 Y u1 e - .DW Reset_Program ;载入ROM时最先执行; U5 a( z: c3 }8 x2 l
- .DW Irq_Program ;IRQ触发时执行
/ r3 H. v. n7 A! v0 x- D
复制代码
- i: V7 d- O/ u' d" F9 E
7 y- j2 V% @, l8 d2 x
! I# x& z+ Y; H Khttps://gitee.com/flame_cyclone/nesasm_3_2 |
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