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这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下# \0 }+ ]0 o/ N ~, Y r* _. `9 ]
# m9 ?: I( z. X, s5 i
以下是主框架代码:( Y3 Z7 M& i; |5 V4 D' D
- ;======================================================================
" T9 N+ H$ p1 z [+ j9 I L5 m - ;文件头$ n+ B$ V7 B1 }$ N5 Q
- NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量! ^+ y. y J/ z+ z4 p" D. t! t
- NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量; s/ j) `; Y2 B6 [! B! | N
- BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码
3 }+ B9 U3 W1 D - ;======================================================================: r1 R8 `5 K5 d: o
- PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2
. z9 S; d9 [3 z/ G" O4 z - PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1
; t! V8 M5 ^' i' [( J - ;======================================================================
' D6 e2 l V# N" }& O) r, T1 R - RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
% k, W4 b0 m3 T1 t, z% ?! U! o+ S& J - RESET_ADDR = $E000 ;主程序起始地址6 |6 M6 g% n9 n" {* q
- ;======================================================================% }3 l! t% _, [6 H
- .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB) \4 B0 R& a) P
- .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB2 u0 F+ |+ w+ d: P$ a
- .INESMAP 4 ;Mapper号 (0-4095)' `" [) G$ c5 e4 ]- s0 A- M* Y' I
- .INESSUBMAP 0 ;子Mapper号 (0-15)
/ i, i. v' z% y" t - .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏)
# [$ t8 o* b5 }6 H - .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)
# W# \" ?8 x+ d* P* T6 K - .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)# E P% M" g9 w9 v3 }% [- f
- .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)/ v: }5 t2 a: R. a+ a/ m
- .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)
& Y8 V) t& u' C4 I - .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)
n: p3 k0 c, s9 Z2 {' L4 C - .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)$ T# W+ C# t, v+ o- w7 _
- ;======================================================================
* M9 f' B9 Z) t6 m - .INCLUDE "fc_demo_config.asm" ;全局配置+ A b j$ p8 ?1 M
- .INCLUDE "fc_demo_constant.asm" ;NES常量' `2 n) M* {8 A3 Y: _5 U# m
- ;======================================================================
6 c3 ]) F& B4 e# z3 ^ - ;音乐配置8 _& l6 f% q+ f7 j! f9 m) c; U A
- .IF 0 = MUSIC_THEME
# e/ ^9 t+ \6 a$ T9 f' r* n; p3 S - .INCLUDE "data/music/Gremlin 2/config.asm"" i' ^4 @' l4 A/ B( {- }4 u. z/ X: y
- .ENDIF$ O; S4 Y( K' E; |9 X
-
! x5 o/ r2 A2 S0 } - .IF 1 = MUSIC_THEME
: E+ |) S) M8 `5 C - .INCLUDE "data/music/Raf World/config.asm"& u. W+ _6 m% H, w W
- .ENDIF
4 t8 x# I* x0 Q/ b - 4 p/ `5 a: l- \1 a: c. ~. U# G' K0 e( u
- .IF 2 = MUSIC_THEME
- ~$ i- p# b2 C& [5 M6 E/ D - .INCLUDE "data/music/Ninja Gaiden 3/config.asm"3 a& e2 O6 f% e" E3 c7 F9 F
- .ENDIF
L( D" ^5 v3 l' i - ; v, o( V' G6 ]6 l- y. F) D0 f. m
- ;======================================================================
5 M! P+ E( O3 Q+ }' i - ;引用CHR图像数据/ o5 I3 H' {+ I; ^
- .BANK NES_16KB_PRG_SIZE * 23 a7 ^% k' P! b( U9 ]; s7 t
- .ORG $0000' E/ L2 _5 T8 I3 ]: I0 R( m7 G" r
- .INCBIN "data/bkg.chr"6 Y: ?9 e. B6 V) v) u
- .INCBIN "data/sp.chr"3 Z* g \, m. P5 W: Z0 o
-
3 ]) E. y6 [3 }7 N7 f% S* A( T - ;======================================================================
, y- ~% r5 j3 h* b7 f' o - .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank
" u' j9 y* x, c! n. R1 i - .ORG RESET_ADDR
, c' U' a( f6 R5 U8 u4 B, L+ i9 o - ;======================================================================1 l. a. j$ U' h; H9 L4 D. K, q& B% M
- ;引用其他源文件7 m; D- d$ m/ ^6 M
- .INCLUDE "fc_demo_ppu.asm" ;PPU处理: M0 z& I; z( \6 q7 c- `
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理: c' T" N# Z# a
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理! w* k5 T# V: _7 X6 G' n5 O8 r
- ;======================================================================
5 R( S% O/ q2 d$ N$ V; p3 `* l' } - " S& o7 i! b1 g4 a# Y' S; b n
- ;======================================================================
. z" j) R, Q/ x7 V - ;等待VBlank到来
! r }$ J1 b, _ W- ~' S1 D - Wait_For_VBlank4 ~8 j+ X+ z6 _% E7 m& |, \
- LDA PPU_STATUS
5 ~* f; g' Z* P# F, O! n( Y0 A: B- u - BPL Wait_For_VBlank: f4 I( w6 ], x, I) E1 U
- RTS
" R2 A% T. Z2 H7 W - 4 f/ r. G0 ~$ T' ^- `6 U
- ;======================================================================; W( `9 @! Z0 p# {+ o3 K
- ;调色板初始化
2 M: J0 D' ?# t2 U8 W8 J - Palette_Init
8 n! H' W- }4 {# G% g6 h3 i8 X - LDA #$3F
$ L, E/ s3 h' t( O, w - STA PPU_ADDRESS
3 L9 K% k& ]' z1 i, l2 a$ o& P - LDA #$00
$ p5 d4 [& O, g" h+ @4 \# w W9 K - STA PPU_ADDRESS# q' j' G1 K. P; }: e
- LDX #$00
# g' i7 n) o5 T v6 N, M' P# { - LDY #$20" j' k; X. z8 r' R
- .Write_Data" x" e0 @5 |$ f! i
- LDA Palette_Data,X
7 O, m2 ]; E2 v+ d - STA FC_PPU_Pal_Addr,X
l p3 @7 \: h5 L - INX& j" O. U# d1 T% [. w0 a2 B& A
- DEY5 E" V. O8 ~" Y
- BNE .Write_Data
, P; x" \; l' D - .End0 E+ \5 p- C8 o) i: a" H- H
- RTS6 b* W0 { M1 o7 o9 s1 K: c7 r% _
- # \6 c& Z# w8 l7 k% N3 U5 h
- ;----------------------------------------
3 j+ Y+ u! s. {9 S% B - ;调色板数据
& x0 S- J2 m" W4 V& E - Palette_Data0 q7 H1 \+ A# a0 v, K
- .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B
6 M$ n, G4 n1 ?1 \ - .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 22( o. f) u. ~) V. X: p g% |: l
- + c" u: j- B( ]
- ;======================================================================
) }6 `: u$ u- [) W7 S) _+ j/ m/ ~ - ;命名表清空
! `0 V7 @, T, d( o& _. `2 ` - Nametable_Clear
2 W: f8 ^+ K# W# r4 c9 m( E) [& k8 w. V: X; } - LDA #$20
4 U+ i) `1 T1 s; l- a - STA PPU_ADDRESS
. u* e5 {$ i, W- B - LDA #$00
# q2 E! h% ~! d+ L/ b/ y Y; o - STA PPU_ADDRESS! A: ~! B, [- c: O
- LDA #$00
3 ~! F5 I9 u, i4 Z5 V+ } - LDX #$00
9 ^3 v; g& ?5 O# [/ e" b; @6 x - LDY #$083 P* i- M/ U7 M& R2 O1 S
- .Write_Data
( F w/ j4 @3 E6 _; e - STA PPU_DATA
; G; ~" S. w) x5 i - INX2 S( p$ n* s5 ]* _! x/ P+ l% P
- BNE .Write_Data) D4 D6 l3 c2 P! u
- DEY
' `, M- ^$ @2 P# O! r: {9 j - BNE .Write_Data
0 A' n5 }) Y) q: ~! y$ b - .End; T4 P$ }9 n. `& p- G/ r
- RTS) @1 D6 N' o) o, ]1 x- v
1 p) @+ ~9 X1 p3 j: w" m; b0 l( b- ;======================================================================5 m% k3 S& L% T/ W5 I
- ;音乐曲目切换7 F0 s$ V. Z1 x, e1 O. @2 `/ n
- Music_Select_Process
" j' W) T9 J7 S ` - : K! U7 a& S& m( D3 n, Q- d P
- .Pre_Music;上一曲
3 A: O! s9 J1 G) I - LDA FC_Gamepad_Once9 l! \8 q3 F5 y3 K$ a& L9 g
- CMP #JOY_KEY_LEFT+ R' v" {8 x$ n% |% l
- BNE .Next_Music
: B( v R, B. {/ g - JSR Music_Play_Pre
' Z: y0 F/ D+ c- W4 D - .Next_Music;下一曲
$ \3 m9 Z/ F; j; n - LDA FC_Gamepad_Once& W j4 {$ x# L+ V9 c) @
- CMP #JOY_KEY_RIGHT5 E# ~. c; D. Q* @: @) ~
- BNE .Next_10_Music
! B( ]# e& `8 v4 m3 Q - JSR Music_Play_Next
& G6 U6 C+ h: f, q - .Next_10_Music;上10曲( p" f; n7 M7 P! C
- LDA FC_Gamepad_Once
4 m5 ]' L1 @3 a {$ ~- s8 _6 ? - CMP #JOY_KEY_UP, Z7 k: }# R/ a. D' t. n
- BNE .Pre_10_Music$ ~4 Y( U7 g' X' S# K
- JSR Music_Play_Next_10
2 k9 b7 O# `' Y$ j5 v - .Pre_10_Music;下10曲8 c. C2 X5 z' [# ?
- LDA FC_Gamepad_Once" X4 f3 K) F& I2 @
- CMP #JOY_KEY_DOWN$ j, g" ^$ E K, u+ S: b: W0 l2 {3 `% x
- BNE .Reset) q3 [9 l/ _6 O9 v! D
- JSR Music_Play_Pre_101 X2 K9 r7 F, P. r4 y# J- c. A
- .Reset;重播当前曲目
; ^2 t+ x, A+ V& w& N - LDA FC_Gamepad_Once
# r, |6 ^" e+ v - CMP #JOY_KEY_START+ P" ~2 H) Q+ F0 O4 I: X
- BNE .End
, a& U: w% |: T/ U/ z- R - LDA FC_Music_Index9 d/ g- f4 H" c) E
- JSR Music_Init_Process+ F" p7 a+ g0 @' Q( i
- .End2 o' K7 Y7 A; w, x; x9 h7 G- c
- RTS7 p+ l- L2 Y; {$ w
- 8 O) K, P8 {# t1 [$ l8 c g
- ;----------------------------------------------------------------------
% \% W) Q$ W8 r1 ^6 C$ R - ;播放上一曲! X R0 F9 ?2 m* e; a) A
- Music_Play_Pre$ h& e# k: e k
- LDA FC_Music_Index
. S! ?9 u7 T( Q( ?( C - BEQ .End0 s% N5 g$ Z0 @
- DEC FC_Music_Index) Q' z) C W/ G: t
- LDA FC_Music_Index
9 `$ I5 u! N. `4 q4 V# V1 S5 P - JSR Music_Init_Process
( j' s5 O B: `5 a - .End( X* w; z( K( C1 d4 W
- RTS
& u! J8 E' f. Q( l: J+ m- } - ;----------------------------------------------------------------------( F: w' `* c9 l4 o0 i2 A- H
- ;播放下一曲. }4 {5 T. N! R; E2 V
- Music_Play_Next) }0 g5 ^% J9 g1 J
- LDA FC_Music_Index0 k# a2 ]. X5 l2 v7 t, z- B# y" r1 {
- CMP FC_Music_Max_Index- u2 k1 u6 b! H3 g: h
- BCS .End9 h% R( g# ~2 H0 K+ l2 ?
- INC FC_Music_Index' I0 ~4 ?; k* X
- LDA FC_Music_Index
, l& x- G" D1 k- L$ Y1 W, _ - JSR Music_Init_Process
) g6 H1 n* Y9 L1 V2 R - .End4 D: r! Q9 B* ], B5 X; t+ j
- RTS! O0 X7 ]8 N: @3 j" M/ ~
- " Z# P( K8 x5 I( y( y \
- ;----------------------------------------------------------------------
. T7 S( T+ k4 {' {, R - ;播放上10曲
0 Y- w& s! W# B4 N - Music_Play_Pre_10
z, V# J) a6 U7 ?' U+ R - LDA FC_Music_Index
?" d' n$ ?0 G: H* K: y - BEQ .End( K" }9 U# ?& G8 _; G+ v# P
- SEC
7 }+ {, h$ M; v7 \ - SBC #10
; T( r# Q, X1 N6 b% k5 f O& s - BCS .Pre_10. w. n {4 ^1 F# ~" w
- LDA #$00
# l, o' d& C' z1 D0 L) z - .Pre_10
; B) z% r# j b1 Y% w - STA FC_Music_Index _( L+ f# ]9 o" s
- JSR Music_Init_Process
4 z" t! W! r! _* ]+ C) t4 ^9 J1 F - .End
% H& ]+ ~9 [7 T4 p- b& h2 i7 L - RTS
) N6 [; Q2 O, ]3 @+ [2 i, \3 o3 | - ;----------------------------------------------------------------------9 \) X* q% o! Q3 r- g: x4 D( l5 x
- ;播放下10曲$ s/ P: V& Z* G- E3 D
- Music_Play_Next_10
1 F" m2 `0 w% z8 g7 q$ n, ^ - LDA FC_Music_Index
# [* O9 f' J2 V - CMP FC_Music_Max_Index
0 I- C6 P+ H( t" I$ I! D - BCS .End! f+ M9 o8 C7 i& N
- CLC6 s# Y" a5 e' a* ?
- ADC #10* ?' k4 c1 e; y7 ?; K
- CMP FC_Music_Max_Index% E0 r; F3 R6 ~& X+ X& }6 ?+ W
- BCC .Next_101 l$ x0 c6 I; \2 Q7 m- x6 [
- LDA FC_Music_Max_Index6 C+ r& [' H9 o% }
- .Next_10
8 b4 V3 x4 c U% N - STA FC_Music_Index" L1 _; D3 A" `9 w7 s8 _0 `
- JSR Music_Init_Process1 [/ Z7 O3 ~0 o* B) c1 |( x5 W
- .End
! E3 {) A4 K1 _4 ^% U2 s - RTS
" }4 u L" u" S; a- F+ M& R" Z+ A
- K; u4 A& F. f4 f- ;----------------------------------------------------------------------
8 b/ h6 x3 ~! v$ t - ;8位十六进制转3位十进制制& w* k2 R% \( C. P# [. t/ [
- Hex8ToDec
4 L. O0 I9 K# G0 G, |+ K - STA FC_Dec_Data_1
/ C# _8 ^; e, C# Q9 { - LDA #$00
$ S% B5 _6 p6 y/ q/ _$ a - STA FC_Dec_Data_100; ~ Y Z" u# U" @0 F5 ~3 r& o
- STA FC_Dec_Data_10
4 \, A% I' D7 X; F - LDA FC_Dec_Data_1
: i, e) p S$ {/ ^ - .Convert_100
# `. x& n) H9 y( e/ G - CMP #100
) z6 w+ Q) D, Z, }$ w - BCC .Convert_10
% d7 b, W k. `& ~7 ~ - SEC
# p! _5 U4 @' K% k8 a6 @, l - SBC #100/ F+ Y1 P+ q2 L" q2 `; I2 G7 e
- INC FC_Dec_Data_100; B4 \7 \8 Q! ?% i. J1 o( ]; _
- BNE .Convert_100
- @# q' h0 _* Z - .Convert_10) u9 }1 o' u" W- @" A( \, M0 x, e
- CMP #10% L* e2 p# y3 M) m. L
- BCC .End. E; y& J/ I. L/ v' I; |1 L7 f% N- B
- SEC+ i) l9 ^4 M+ ^) H
- SBC #10& f8 |4 X' k2 E* D
- INC FC_Dec_Data_103 }& h4 U+ k+ T7 @1 @- q3 r/ b4 O
- BNE .Convert_10
9 b2 t: n# m8 N6 n% W5 |1 O- ? - .End8 I3 }- x+ X& ]- ?) g3 U# f
- STA FC_Dec_Data_1
6 T$ ^- g( ~' V9 w - RTS/ V6 F; n# B9 t0 Z5 z
" S8 ]. w4 B5 n0 y( L( l, Q- ;----------------------------------------------------------------------/ K( p5 b1 x( \1 N$ e7 {4 o: b
- ;显示曲目信息
% @2 ~- S) j: L7 j" v - Music_Info_Display
$ A# S4 a. {* @5 L6 y0 K$ `9 y - LDX FC_PPU_Buf_Count: i7 t5 Z4 f7 Y+ `
- LDA #PPU_WRITE_MODE_CNT_LINE
6 h$ c8 ?- s V* {; o - STA Use_PPU_Buffer,X! \: K3 K. h( B9 \" ?! O
- INX+ N. x" c2 W" Z" a- N
- c) y3 `6 M/ b1 u" W
- LDA #>MUSIC_INFO_POS
$ @1 F- h8 A9 M' i - STA Use_PPU_Buffer,X
& a/ E; z3 |, D) C9 T: m - INX" c& H+ p! E1 z- c. c
- 7 `' S+ x3 }' Y. }
- ;居中- ^: j$ r6 Q; j B/ I/ A2 E; z( W
- LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
- H( a7 w6 ]& N- _ - STA Use_PPU_Buffer,X, v) j, o% y$ J; D( V
- INX) l! V; M3 r: [8 Q
- ; n% b# p+ _5 ~/ ?- \
- LDA #$057 r, k# c2 M' n) J
- STA Use_PPU_Buffer,X4 a7 O& M; ~, U, h9 y
- INX
& t" b# n* i" w. E" t6 ?0 T - 6 c8 D0 m0 f3 I: j: t5 D+ @$ R
- LDA FC_Music_Index
8 F% v$ a0 X+ q- T - CLC
5 Z% y+ e/ A* g2 ]) P/ ~ - ADC #$01
, p, W( F5 F, u' x0 y. Y/ _ - JSR Hex8ToDec' }; y3 K- o, c( n! E4 X7 @5 \
- 6 W! F4 g0 w$ u% B
- LDA FC_Dec_Data_10
) ~4 e1 H6 }) d- | - CLC
- R" [- D+ L$ g - ADC #'0'! ?4 ?. R6 W9 t# a
- STA Use_PPU_Buffer,X
* P* Y4 D6 j; G4 }+ G - INX
# G, S$ e. f3 o# L- D1 I - , k3 }; q/ O) j8 d# j: d
- LDA FC_Dec_Data_1# E Q0 `/ {1 @( `1 _
- CLC
# R1 Q$ P2 i% V" H1 W g( Q - ADC #'0'
% n1 j" R9 ?4 X# X$ V/ I) F: a - STA Use_PPU_Buffer,X" }9 ^/ {) g1 h3 b! G5 x8 \6 C9 u
- INX
1 Q+ |1 k6 [! f: x& ] i - ) o2 V6 U3 n6 }
- LDA #'/'
- {9 Z/ w$ [& f3 S7 x( t5 e - STA Use_PPU_Buffer,X
+ J- y% R( d5 y }! D - INX
) N7 L( d: e; ~+ B# V -
( H7 V9 |! r% D8 k& z+ f9 ?, } - LDA FC_Music_Max_Index ?* f J) w$ o" b+ `5 E8 ]) b
- CLC
# \2 j. N% M, m) w' z - ADC #$01
3 P. t* |/ p7 [' [ - JSR Hex8ToDec' r4 n8 X! r- v# x3 P
-
. \4 G3 y* a, ^ - LDA FC_Dec_Data_10% z, }4 f- @" z& Q' N: D' k
- CLC# ]7 u/ f& o" V& _& M& h
- ADC #'0'
* l ]+ \. v6 q* K3 X: H - STA Use_PPU_Buffer,X( r* W4 R& D; L! l2 Z/ K9 ?9 @
- INX4 [% V- l0 }# I1 d
-
/ b# `, X" a) g( k3 u2 K - LDA FC_Dec_Data_1% h7 S+ S, |- U8 P
- CLC
& k0 l0 W: e6 Y { - ADC #'0'
: Z- _3 }* V. b) o5 _: U - STA Use_PPU_Buffer,X+ p% }4 U0 S' ]& U
- INX
6 Q2 B, z% \9 J1 L5 Z - 7 F$ _- _, T9 j1 q
- .End
; |! y1 B) d1 q* G$ i# l( Z - STX FC_PPU_Buf_Count
0 F% y9 z' i( C _( i - RTS" Z2 a0 t1 S. T- E8 L
- , K; s+ W3 {8 k4 y6 f' r$ C
- ;----------------------------------------------------------------------2 C" P9 S7 c% }% {
- ;音乐曲目初始化处理- ]/ r, P4 `" z4 ?4 z
- Music_Init_Process
& r: m$ u/ h! }$ G) a - PHA
5 T+ [$ S, ]% e' C6 v6 i# Q - JSR Music_Clear_Process6 d5 M5 j' n% @
- LDA #$1F
1 \7 }. Z9 M: v) @% V6 @) \0 N n - STA $4015
2 t' R$ r$ A: q* C - PLA) i2 a% Q- c M, @8 D
- JSR Music_Init_Addr& u8 w0 w" n$ X: G+ ^9 _/ Z8 B
- JSR Music_Info_Display
3 c7 I8 f4 ^1 [+ Z* N - RTS8 @& p0 n; M3 P" ~( }2 x# M% r
# k" a. p% v, Q& v, `6 |& m- ;----------------------------------------------------------------------6 j9 U" a' `6 Z* [! N3 D' n/ s
- ;音乐播放处理0 o8 R$ P: f4 B0 I d0 N2 T
- Music_Play_Process) [3 U* q& b' n% k
- JSR Music_Play_Addr) p) x# R" P7 B- D- R/ u) ^0 L9 T, I
- RTS* e$ @* P; t5 v0 g. L. c% u" `. e/ [0 S
# M; ?* d z( n9 B! H' b9 b- ;----------------------------------------------------------------------/ M/ z# q: |: k* m4 f0 d5 L* u
- ;音乐播放处理
0 t" a7 a' r( }7 V; R - Music_Clear_Process
5 f) D- k; L! k4 ]* Q - .IF Music_Clear_Addr: v* N8 T* P$ M5 p4 W0 S
- JSR Music_Clear_Addr
, z# M# m( N- }: M: ^6 |' | - RTS
% j+ Q: y7 p6 D/ g$ A { - .ELSE
9 B$ { K, U! J8 b7 q - LDA #$1F$ o, w1 h1 w T% `8 X2 J
- STA $4015
- h& z4 m* R' X& L - LDA #$00
: m* Z. Z: ]: `2 s2 Y - STA $4010. M0 k& w( K1 |
- LDX #$005 l/ }% b7 p) r) C. v* M
- LDA #$008 ~" l* m4 h' p. r0 v0 f
-
6 G" D5 }) {" M, e$ j" } - .Music_Clear_Zreo_Page_0
) l/ ^+ f, B1 G2 z' b - STA $00,X
) M: L7 y! L0 {& z" ]; C6 H - INX
* Q1 M0 J7 ^. K/ h% ] - CPX #Use_Zero_Page_Begin f, J# I# D7 {
- BCC .Music_Clear_Zreo_Page_0 v* u# ~% `* V
-
; g. k5 r7 V+ _! {0 V7 E8 O. z - LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size
0 c+ Z8 _2 D0 S' [0 D! M! F - .Music_Clear_Zreo_Page_1( k1 a5 @; I( W- W
- STA $00,X
% @. @2 A' p6 Z F - INX- q9 ^+ Q; g0 {0 l4 Y" R* ]
- BNE .Music_Clear_Zreo_Page_18 t7 h4 C* r; {
-
8 e& ^% o0 M# @% `* w - Music_Clear_Process_1( `- J% a0 W* J- ]
- STA $0600,X9 C) z* {6 x2 e y& r2 W$ F: O
- STA $0700,X
* [0 I3 y' g4 m0 f - INX% `( G. B. ?6 y3 U1 W
- BNE Music_Clear_Process_1( E! a2 O9 K( G3 I
- LDA #$10
7 C* p0 Y" Z0 t4 s* F - STA $4000
; H9 E+ r0 E1 A3 V7 ^9 U! f( d - STA $4004& Z; k P( H9 K1 {) |6 |
- STA $400C2 {( S% a. ]6 }+ X( \. b i% `5 F# E
- LDA #$00
8 C; U: r5 `3 x0 L# J$ ~, W( F - STA $4008
- _0 D, i2 p5 z; }2 E' Z6 q - LDA #$0F. ?5 L/ ]% j5 ?
- STA $4015' \0 \: C/ u+ {6 Y. S
- .ENDIF
- n* n6 U! ~; M% u. a0 n -
" ?* d- S) b: M9 p3 g0 i - RTS+ O2 N7 K- \8 A7 e+ d& y% c* M
- 1 b8 C# o" X# v
- ;======================================================================
' H7 ?, i- c% R) a* H, Z* k H, @4 ^7 Y - ;重启处理& @9 c7 ^9 W- b2 S: E+ y$ Z' F5 g
- Reset_Program8 ]. t9 H! [) F" K: ~
- SEI) X1 T; W4 \( a1 I
- CLD
# O. ]! u; n& R' C. G; ] - LDA #$00+ f* T& d4 l; v: c+ G: ~
- STA PPU_CTRL
6 T, D' ^4 D' \3 r5 q - STA PPU_MASK& X, M& `( }3 C' x8 T$ F. b& H8 X# C
- STA JOY2_FRAME
6 S" [+ A9 {6 c. _ - STA APU_STATUS+ T$ T; D, y7 t, j9 c
-
" Q- E: q+ x( f7 B - ;等待屏幕准备完毕1 q* L1 ?( D1 G4 Q& g; v* O3 p
- LDX #$02" a& v( Q, j/ _& R0 M
- .Wait_For_Screen_Ready7 r6 l& z$ A$ _# ~0 R
- LDA PPU_STATUS
" ^0 _! Y# ^! y4 E - BPL .Wait_For_Screen_Ready! x \, P$ D9 @, o( W s/ A) X; \
- DEX7 O4 g+ Y( G3 J: t) ]1 J. W
- BNE .Wait_For_Screen_Ready3 d1 Q# E1 @8 [; ^/ O1 j
- C& S# E& b) ]/ q j* x
- ;清空调色板
6 U* j. z( O B. M; y( p6 t6 { - Palette_Clear
( O( _& l$ l/ g( L5 V# o - LDA #$3F
7 U$ w4 X) }0 w7 ~5 l7 N - STA PPU_ADDRESS. m5 x3 O1 s" @$ p- L! ]5 i G% F8 s
- LDA #$005 r1 N, J) `2 I! s/ `8 W' l# v
- STA PPU_ADDRESS+ O8 V$ B+ D" x& g+ i; V. O4 _! k0 _
- LDX #$20: f: t. J% F0 R( r8 O2 w
- LDA #$0F
- b- S/ B) C4 h. B" {/ a+ @ - .Write_Data
5 V0 @: a+ T: [* A z - STA PPU_DATA
. X, b0 J8 G0 C# c# O - DEX6 f, q/ Z7 a9 D% n
- BNE .Write_Data2 r" S# I* \3 f" M8 G& q
- & f6 S K3 p' S; y1 T/ | k2 T
- ;清除声音 $4000-4013
/ p9 H: f; n; c7 A" Q - LDY #$14
" y, y$ `( m5 ^* U9 P3 {' p0 K - LDX #$00& O$ j1 a1 C- m# I
- .Sound_Clear
8 L6 N2 \# Y @- c: a* Z. B - STA $4000,X
1 G4 U/ r9 q2 N: z! d% ?, V - INX
/ R; H2 }: V6 C9 p" N2 w: o, } - DEY
" e. O7 K8 `+ f$ v - BNE .Sound_Clear
. Z: ~# e% D: l+ Z0 d9 }! R% D7 F -
) i9 F$ o- G; o# h- [: R - ;清除 RAM $0000-07FF# S" h& n8 i/ o# g( T: Z0 V
- LDA #$00
( ~) k3 H" z) V - STA $00
/ [& H1 Z$ r* y! t' \: \ - STA $01
3 K9 D4 a+ g" f; g5 } - TAY
0 {9 d8 c( T3 _7 R - LDX #$08+ d, A, x: ?" \& }% ^7 i
- .Memory_Clear
9 n% O9 }' ?" I3 ~3 [- p7 M - STA [$00],Y
: W3 K0 j0 D2 m. V - INY7 A0 h' p3 j+ S$ E+ s, Q
- BNE .Memory_Clear
' C. D0 d3 B# f/ h6 F - INC $019 e9 d" s6 `; O; `; }6 n
- DEX
6 f% z3 M" Z( L2 X1 |/ D - BNE .Memory_Clear
3 z0 N# R) @; r8 V' f3 t6 K -
, ]1 _8 a% }3 m+ k( w - ;精灵缓冲初始化6 t8 |) P" I* |5 o3 K. _, f
- LDX #$00
8 L3 _4 W& g3 B: g - LDA #$F8
. b6 _( r* c8 u) v- `8 Y5 m5 H8 y - .OAM_Clear( |1 n9 i$ Z" [1 C+ N7 P% z% w; b
- STA OAM_DMA_Buffer,X" v, x4 v) K9 q0 z& P0 q
- INX
3 v/ S' d: h% K+ U - BNE .OAM_Clear( Q: r1 p5 O+ ?' |6 ~
-
$ {% F# c# W. T7 d& E8 Q; u - ;栈指针初始化
. [, x9 T, x6 c3 u) ~; G% I - LDX #$FF
1 F3 P+ Q* A2 k) h% R - TXS# D# `3 |2 v1 T3 T- V
-
8 l. _# M' n& U1 Y6 v+ v* U - JSR Nametable_Clear;命名表清空# D) v6 i) a8 k) V/ `2 {
- JSR Palette_Init;初始化调色板缓冲
* o0 d+ w0 G& T `8 j! E1 {# \ - JSR Static_Text_Init;初始化静态文本1 U- j' F% B+ L" m! e
-
Z" S' p# c: n - LDA #MUSIC_ITEM_TOTAL - 14 @* B. \7 C1 z7 Q! O
- STA FC_Music_Max_Index$ M9 {, ?. f4 D4 \: I( E* s
-
5 f8 [4 d* t9 Y - LDA #$1F1 q# B$ i5 ~1 @- t; O: a4 x
- STA APU_STATUS
; F9 R# P t6 P9 b" F! v - LDA #MUSIC_BGM - 15 \, V% o& V4 o6 T6 i( ^
- STA FC_Music_Index
x% U+ h9 T) _6 V; n6 s8 S - JSR Music_Init_Process;音乐播放1 l4 x% i; I1 y. S+ T b
-
4 e( T: L: P$ V. H) N - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)/ I% p- L6 C* ?- K
- LDA #$1E
0 }' Y0 d4 R' w8 ?4 b - STA FC_PPU_Mask_Buf3 p S+ m6 C, h9 a! B9 p5 Q
- , N0 [% i, g {& A8 n2 N7 x7 F
- ;启用NMI处理
8 {$ n7 J, b+ u - LDA #$80( ]" `& X$ M3 }/ D
- STA PPU_CTRL4 T# _: r1 {& d* ~- {3 x& W g7 L
-
]2 ~; E" q- U' J! T5 L4 i - ;程序循环, 剩余工作交给 NMI 中断处理& I5 s) s8 q9 v2 v% [7 O! R0 r! M; z- q
- .Loop! J6 i* K5 M! u7 a4 _2 q
- JMP .Loop
4 C! l8 f5 x+ U# `+ i7 e& E0 {
$ W7 k) G7 ~0 t9 O5 }9 ]0 I4 g- ;======================================================================! @, `6 w4 P) L) h$ U
- ;不可屏蔽中断处理; \7 | ? t ~) a- E
- Nmi_Program
0 u* I# W+ B! N. v! p - PHA" l D6 |; }" _0 v/ A% k
- TXA( K) c- d& L7 ~- \
- PHA
" O/ J9 O" G' A! D P: h3 M - TYA
, k% B/ c" r, B& R' U: k+ y# _. [ - PHA! v3 l! x) y! F. ?. y9 f7 s# `7 |$ K0 ]
-
h7 y0 g B! o2 p9 S - LDA PPU_STATUS;读取使得 PPU状态寄存器复位
- P) y' L+ ^/ c4 o - j5 {8 X& U' i5 |! N7 s# @
- JSR FC_PPU_Procrss;PPU处理9 `& a$ t8 T. }! u/ ~5 b
-
0 e; L- v3 i% _' e$ I3 \ - ;精灵内存更新
. z$ K" o4 c* |+ ^8 F - LDA #$00
3 P' g8 H! p7 g" l* d/ s6 c - STA PPU_OAM_ADDR
- |$ w) p) m( j7 h# i) S - LDA #OAM_DMA_Buffer / $01001 p: `: x2 N _2 y
- STA OAM_DMA3 m1 S) J: w. |* g
- , [8 y J$ n; c; Z4 w
- JSR FC_Gamepad_Process;手柄输入处理: h- l3 \+ ]. e. \9 D) L' x* e$ ?
- JSR Music_Select_Process;音乐选曲处理! D' v$ x" j4 K5 n1 K
- JSR Music_Play_Process;音乐播放处理& g7 C- X4 s: s, i9 |8 L% Z% S' w
-
2 R; \& t, R- H/ q/ x2 L - PLA' n" O9 l4 v9 T% t5 I
- TAY6 \/ A8 m. _) \& C; @6 B. M
- PLA% H* V8 O2 h) I: ~' O
- TAX
( Y3 w( ^: x& O, L# U/ e# @ - PLA
1 ] T2 z! g0 y, i
* \: d" l, s$ @- RTI' q! u1 k& H; Z4 z
+ [3 x1 k+ d- K# N$ P- ;======================================================================8 d- C& r, \; P% v* h
- ;请求中断处理
; }% a. C' g) Q/ U S - Irq_Program9 }2 A% ^5 \& z- f% ]* Y
- RTI
5 }9 {4 [) v7 k, v/ a! n2 Y! J - ' s1 ~1 n2 `9 _# d- V, C
- ;======================================================================
8 m9 b0 M5 U; i5 l - ;中断向量表
a6 b. G0 }( c# ?, t) P9 R - .ORG $FFFA& g$ A# E$ Y9 G) Y/ j4 X( |: q% c
- .DW Nmi_Program ;NMI触发时执行! T8 d6 t% U1 y, F4 v
- .DW Reset_Program ;载入ROM时最先执行7 d: U0 b! k1 T9 y. y
- .DW Irq_Program ;IRQ触发时执行7 _5 B8 k" W5 i$ l( H8 O
复制代码
5 I/ e0 k" N2 o6 Q
7 g0 K1 q5 c9 n$ l _1 t* Z" H0 d$ ^1 ^. R
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