|
|
这是个 nesasm 3.2 入土教程, 感兴趣的可以研究下
, @; @! s# |* w9 y+ t* u( y; q
. ^$ ]* V; ]2 ]% e( m7 X; f8 x以下是主框架代码:
0 i9 {+ O" D& s) h& ]% E- ;======================================================================
1 T( q4 {0 L$ j; z$ x! E P5 h - ;文件头
) z- d2 i: x5 }& p! K9 z - NES_16KB_PRG_SIZE = 8 ;16KB PRG大小数量
4 D6 S7 \! u' Q) r; } - NES_8KB_CHR_SIZE = 1 ;8KB CHR大小数量
8 t' J/ k" A$ K+ c" Y9 A2 i# I9 k - BANK_DATA_MASK = NES_16KB_PRG_SIZE * 2 - 1 ;bank号掩码3 r+ P* N9 u3 q7 g
- ;======================================================================
4 c+ D& C9 x* e: y - PRG_DATA_BANK_C000 = NES_16KB_PRG_SIZE * 2 - 2& w7 f; V8 e. I# ?4 E
- PRG_DATA_BANK_E000 = NES_16KB_PRG_SIZE * 2 - 1
& p% n+ e' }* y3 q' z: \2 R2 [ - ;======================================================================- B3 k0 D+ m# M- M1 ^, ^
- RESET_BANK = NES_16KB_PRG_SIZE * 2 - 1
- |5 W1 ?# Y/ g% G. {% q! y - RESET_ADDR = $E000 ;主程序起始地址3 q T% [2 i7 q& n" W6 N( f3 p
- ;======================================================================
( X" {1 _' \; _8 @, y; R7 W2 ^6 ~ - .INESPRG NES_16KB_PRG_SIZE ;16KB PRG 数量, $01-$EF8(1-3832),即16-61,312 KB
4 S" V$ w; y; o; H' { - .INESCHR NES_8KB_CHR_SIZE ;8KB CHR 数量,$01-$EF8(1-3832),即0-30,656 KB$ d0 J' `& [, R! P7 S! s# w
- .INESMAP 4 ;Mapper号 (0-4095)4 R4 W! F. B$ p5 j, H% b( Q) T
- .INESSUBMAP 0 ;子Mapper号 (0-15)
' a7 g8 n3 C3 L- c8 P - .INESMIR 0 ;命名表镜像 (0: 水平 1: 垂直 2: 四屏); y! `+ c6 c5 p! q8 Q
- .INESBAT 0 ;指定是否存在电池备份 (0: 不存在 1: 存在)
& k2 u3 s1 Z3 i& h7 } - .INESPRGRAM 0 ;指定 PRG RAM 大小 (大小 = 64字节 << 计数)
p; P i+ T' |0 Z( Q9 L4 S - .INESPRGNVRAM 0 ;指定 PRG NVRAM 大小(大小 = 64字节 << 计数)
9 _$ a3 n; w. D% Q/ n+ O! z0 m - .INESCHRRAM 0 ;指定 CHR RAM 大小(大小 = 64字节 << 计数)
' i1 W8 L' P+ @) k8 z4 L3 u" b$ v( j( r - .INESCHRNVRAM 0 ;指定 CHR NVRAM 大小(大小 = 64字节 << 计数)/ [" b6 E6 j8 O7 J
- .INESTIM 0 ;指定时序 (0: NTSC, 1: PAL, 2: 多区域, 3: Dendy)
5 P+ O: X* h- l- y8 N, q - ;======================================================================8 W/ [* U/ F) K( T: J- w( J3 m
- .INCLUDE "fc_demo_config.asm" ;全局配置) R: P5 r: ]% M* p+ u
- .INCLUDE "fc_demo_constant.asm" ;NES常量& Y; c9 {, \, j' G/ [$ a' j' f
- ;======================================================================" B$ R9 V3 o- b2 j( D, a& X1 u
- ;音乐配置
, h, W% }3 d# \( ~6 ]$ T# W( E* h7 ~ - .IF 0 = MUSIC_THEME
2 I7 Q4 H( n! Q$ ^/ G4 ] - .INCLUDE "data/music/Gremlin 2/config.asm"( D" N$ t! y- h9 `7 b6 L- I/ K5 g$ [0 k
- .ENDIF
5 `6 Y* @4 d4 @. R - ?5 I% s5 T8 S' r7 A) j3 J
- .IF 1 = MUSIC_THEME
2 ?- ?5 n5 ]1 e- }6 ^. F. K& ^ - .INCLUDE "data/music/Raf World/config.asm" @9 R( K! {+ A* L
- .ENDIF
2 @, \* Y; U) v* g0 w) B% v/ ~" V - $ a. h( E* e6 q. k; {+ k" X) S. A
- .IF 2 = MUSIC_THEME
0 R9 E$ A/ e/ S% M A - .INCLUDE "data/music/Ninja Gaiden 3/config.asm"* P5 j% W; B y# C% W
- .ENDIF2 i3 r4 W/ Q5 g9 Q2 V/ g, i2 u
- & m& o' }7 b8 X, t
- ;======================================================================
( {" ^: Y# p/ [% m. q. Q8 e - ;引用CHR图像数据1 G5 r7 ~. ], k" {
- .BANK NES_16KB_PRG_SIZE * 20 I. O# j5 P4 x* g' M1 P8 X' m& f
- .ORG $0000
! A6 x1 p3 Q$ I& c - .INCBIN "data/bkg.chr"
: x& M' V9 d/ }7 f! ^3 U. R - .INCBIN "data/sp.chr"
$ W" ~0 g& q% r. l* `2 L& l4 @ -
1 G4 u/ {3 B8 Z- d3 ?/ J1 J - ;======================================================================
( }! S7 R. ?" W0 ?: y% \' U8 E+ u/ ` - .BANK PRG_DATA_BANK_E000 & BANK_DATA_MASK;设置程序所在Bank2 |$ p f1 [; C
- .ORG RESET_ADDR8 O; ?7 _" q' f$ U. v; N5 A
- ;======================================================================
! h+ X. ^; R, q. j3 n& R# F* Y' x r - ;引用其他源文件
+ P$ t" T/ d/ I/ { - .INCLUDE "fc_demo_ppu.asm" ;PPU处理2 c, P1 ^. h6 m4 L3 V9 E
- .INCLUDE "fc_demo_joysitck.asm" ;手柄处理! W) G8 ?2 H y2 \) {
- .INCLUDE "fc_demo_static_text.asm" ;静态文本处理
. h% A3 J0 v* c; k2 r - ;======================================================================
0 ^/ B. O! v; X4 }9 s: M2 K, x4 e - 4 g; m) P5 j% Y d. ]
- ;======================================================================; t) B H/ e! W3 X
- ;等待VBlank到来& v+ B7 w Q6 N. |9 e5 p6 [* @9 _
- Wait_For_VBlank3 l/ D n7 K" a" D6 A5 L
- LDA PPU_STATUS1 o2 d. E t5 O [6 [; [( u
- BPL Wait_For_VBlank/ z! ]* d* [: j% Y
- RTS5 p j) t* l% U5 Y
8 S! I" U5 p' q, t( c& s- k, g- ;======================================================================
9 t- D1 X3 I) B& a - ;调色板初始化: _. q& s1 u, C* Y* Y# n' W( H; k
- Palette_Init+ ^& S5 f& l |" A
- LDA #$3F6 _" l) Q0 m4 O+ v: L
- STA PPU_ADDRESS& z+ K) u% s9 z% e; M3 a3 q
- LDA #$00
5 x3 r+ q! d' z3 p' |* J7 A, ? - STA PPU_ADDRESS
3 N" |7 J1 j! {( J - LDX #$00
' v3 B+ o* g9 i9 v [; u: A - LDY #$20
6 l* k) [) B; W. C! n# w( p( s6 X - .Write_Data" Q( \% j2 O, V6 G' P
- LDA Palette_Data,X
2 q: R& \, s9 t - STA FC_PPU_Pal_Addr,X# n. z7 r+ g) r6 V$ V
- INX8 V3 N/ G8 s8 s4 q
- DEY/ s' ~# ?7 a" i8 i: Y
- BNE .Write_Data! F) f+ M; @8 ?6 I
- .End' [$ E) Z" I# x5 Q% p: c
- RTS
+ w, {6 G4 r1 O1 f, t9 B
, z2 `" W# j% Q, @* A9 I5 x6 T- ;----------------------------------------
6 f% q/ A; E! w& Q! [ `7 Q! j - ;调色板数据
1 f6 G* T l$ Y: `) M" g& H; l8 O - Palette_Data
/ j" Z5 R) W; T1 C1 O - .HEX 0F 20 32 02 0F 20 32 0F 0F 20 32 26 0F 1B 0F 1B1 ^& @& V: A& [5 _' ]7 T# ^: z
- .HEX 0F 21 27 22 0F 24 24 24 0F 21 21 21 0F 22 22 229 X4 ]' `' J) {: }
-
" k' d4 Y. Q5 _# ^ - ;======================================================================
7 Z# Y8 y# f8 ^7 g' i7 J3 L$ g/ W - ;命名表清空
* o" b+ _3 L7 Z7 {. H) m - Nametable_Clear, E$ q" b, X$ k( V
- LDA #$20) e w; s" {1 W
- STA PPU_ADDRESS
- _$ c8 s) N: K* w6 q$ s - LDA #$00
# j/ T4 ]5 N- p% j- B/ M% w B - STA PPU_ADDRESS
0 l3 ? O) g! |: ^* t) ?- u1 F* k - LDA #$00( p; u1 w6 y( N2 l
- LDX #$00
; A) }2 R1 x2 D# b1 g - LDY #$088 C" x# w0 C+ f
- .Write_Data. Z$ s+ V+ V1 d% d( o& m! U8 E
- STA PPU_DATA8 g" x* ` @. G! Q- Q! Q+ M- v
- INX
0 v' b* n: ]# B - BNE .Write_Data
# l- H/ V9 ]- R( C5 O - DEY
: y( B9 s3 D9 B5 T, `- }$ W$ ~ - BNE .Write_Data0 J9 w5 g7 D0 o3 t$ X5 V5 M, ~
- .End
* v# k+ K/ X% ~# B - RTS
* `0 d+ G9 T% p+ b f
* B9 [/ a. g; C- ;======================================================================; p; N! t5 {! B) o/ o
- ;音乐曲目切换
' U% P# d- ]1 d) ]) S4 n - Music_Select_Process
% p D" z/ d7 T - - W" N9 {2 ~, v3 w( v" ^7 ]
- .Pre_Music;上一曲
- g/ [* ^0 f+ P6 z/ { - LDA FC_Gamepad_Once
& A+ C% S/ l% ] y" M7 m' V; K - CMP #JOY_KEY_LEFT
% Q6 Q! K: q# b8 A - BNE .Next_Music
% ~6 L' p& c- d. o' F2 m& @ - JSR Music_Play_Pre+ [6 A) Q: W6 I/ C, ]2 e& @
- .Next_Music;下一曲+ L, k- K; j* k' O- G' I$ `( u
- LDA FC_Gamepad_Once
0 P3 q E( c9 D) s7 p% L - CMP #JOY_KEY_RIGHT
4 ^+ ?; x- W# g m f! A, J - BNE .Next_10_Music6 I5 g) Y, H) `0 {2 |1 e
- JSR Music_Play_Next
+ W. g+ Y/ K" b `* o - .Next_10_Music;上10曲; G- S6 W1 c J$ H5 v: Q; v. C: w3 Q
- LDA FC_Gamepad_Once
4 |) r, E0 v1 @# x+ G6 t - CMP #JOY_KEY_UP
8 k. k; ?1 B0 o6 B9 S% b U8 v - BNE .Pre_10_Music
4 C' A& a0 e* v; h2 f - JSR Music_Play_Next_10
; M9 j; B% v4 X2 g9 ` - .Pre_10_Music;下10曲
6 b5 d: i8 ?" g3 T$ V$ m/ c5 _ - LDA FC_Gamepad_Once7 j, ~7 \, a5 a* N. Q' Y
- CMP #JOY_KEY_DOWN
- |/ P# _1 m c* }% }9 h - BNE .Reset' ]( d! Q8 P# L
- JSR Music_Play_Pre_100 c0 V9 I8 W! \/ k" O+ T! |
- .Reset;重播当前曲目
1 k, U/ \; F5 E+ Q4 J& |8 }1 H - LDA FC_Gamepad_Once/ Q- \% e* E5 e- K7 E) I
- CMP #JOY_KEY_START6 _1 p' ?4 e$ _, J! d
- BNE .End
, N, O! n9 E6 v' L - LDA FC_Music_Index) k( I0 B5 V1 o5 g/ S: F2 r
- JSR Music_Init_Process
; r9 k! {9 p( V: F - .End
/ W9 R8 K" _ m2 N0 L# l+ Y$ z - RTS" B w. v5 O& j0 b1 N
+ C) _) U" o7 _5 B9 {) Q* U: s- ;----------------------------------------------------------------------
/ y7 ]0 {8 i$ f6 d1 a - ;播放上一曲
# N- S+ ^0 C9 D3 W - Music_Play_Pre
4 ]2 ?3 L8 C" `2 n$ O# F - LDA FC_Music_Index! h' d0 P5 o( w" L' c. n8 U
- BEQ .End
8 Z A4 L! a$ {! N% f - DEC FC_Music_Index
& z/ ^6 Q! E: f1 w! c8 ?& L u - LDA FC_Music_Index( m, J- Q" A; t5 F9 m. g$ h4 J* A
- JSR Music_Init_Process1 E* K8 A' [8 w
- .End
% [0 X4 W z" s - RTS
' H4 N1 D: ^+ Z - ;----------------------------------------------------------------------6 ^3 r/ {! ~. l. G) H8 I7 v
- ;播放下一曲
- ~. L7 h) ] W: q - Music_Play_Next2 T, a9 ]5 J$ }( ^1 Q6 N
- LDA FC_Music_Index
b j. c& G% v" W1 Z9 x. c% C, G - CMP FC_Music_Max_Index* N. D$ r* e- ~$ }6 |! h
- BCS .End( l* W6 N) o7 `
- INC FC_Music_Index0 t: q5 S+ g- [& r) r5 q7 ]9 Q
- LDA FC_Music_Index2 w, ~; _0 {2 y* b9 w" H
- JSR Music_Init_Process/ ]* i' S- y4 j' G, M
- .End' o( a" K$ F9 q+ M
- RTS
' q. q* e; V6 [: h q2 P - 7 C( J4 B$ c, J, Y$ K9 o. }
- ;----------------------------------------------------------------------5 {# t+ \ P5 N: @0 `: y6 b+ u
- ;播放上10曲
# V5 j' s! b+ a- E1 A - Music_Play_Pre_10, `: |7 g6 F6 k
- LDA FC_Music_Index
7 }: [, v. p( N& s3 Y3 N* E - BEQ .End3 h+ z/ v8 j. n; q5 @
- SEC$ ^, v! c2 ]. X% E$ t: G3 Z4 {' }
- SBC #10% T3 L1 L5 j4 Y5 c8 ^9 W
- BCS .Pre_10
- w+ s# L2 i5 X; z - LDA #$00
* u, g: R- q; Y; G$ Z( W - .Pre_10 x& W$ G L: u
- STA FC_Music_Index
9 U% x: G4 ~0 P# C9 Z - JSR Music_Init_Process6 F- b8 M- a, q) J
- .End* [6 d) E, Y3 O, P7 }
- RTS
) i8 ` ?. I$ B - ;----------------------------------------------------------------------$ y' Y5 t( h- P, `
- ;播放下10曲) h B4 T+ z- w- f1 [- U- Q; m" A
- Music_Play_Next_10, k6 g1 k5 ]. G7 D$ T/ [5 E) D
- LDA FC_Music_Index9 Q6 I: |2 Z$ R" _1 `
- CMP FC_Music_Max_Index9 x( {1 f9 p' w! [( F3 _4 u7 z
- BCS .End& |2 Y" z, \( A, V2 I
- CLC
' l* U* X& W. h Q - ADC #10. R( J" Y" V* B' o
- CMP FC_Music_Max_Index; z! c! N) p( }
- BCC .Next_10' }5 v" H" I* r
- LDA FC_Music_Max_Index
. z! L0 @3 D2 O/ w3 T* \ - .Next_100 x$ R2 a! ]$ o, }# s- N1 _, m0 t* \
- STA FC_Music_Index
. Q1 r) i1 w, i: e - JSR Music_Init_Process
( c; D! V, g8 D3 X* s4 t% C - .End/ }3 f9 b& n4 u/ j/ u! V$ W4 ]
- RTS
5 v. y! d0 u- U9 G7 v& w4 g* F
9 c# L+ r4 v: K- ;----------------------------------------------------------------------3 v7 C- S! y6 C n$ c
- ;8位十六进制转3位十进制制
k* h* l0 k1 j: B6 w, c* G- l - Hex8ToDec Y) Y" J' U+ N' G" H) X
- STA FC_Dec_Data_1
6 D. W3 p' ^7 Q - LDA #$00
; j7 ]3 o4 F$ d+ A - STA FC_Dec_Data_100 [7 s x K2 h9 ]7 q/ K9 X. [+ j
- STA FC_Dec_Data_10
8 y( o% m: G& V9 ~: B - LDA FC_Dec_Data_1
/ {2 i. e% M7 Q- \. U6 m - .Convert_100
+ \0 ?* G! U, z' k# d3 A( h& U b8 ^; N: e - CMP #100
! w$ F% l4 D6 g5 J9 |* K6 K - BCC .Convert_106 R- N' H2 ?& h( n/ K
- SEC
' r. A( }/ T. b2 C, C0 u( }8 { - SBC #100
$ ?/ l4 g3 o$ u" W# x( \/ V - INC FC_Dec_Data_100$ H, {% H7 t5 k/ V' g5 e
- BNE .Convert_1004 @* Y( O& B% g2 l" G1 c
- .Convert_10/ V1 @1 `( D4 r; r0 R9 y0 V/ C
- CMP #10
; d) v: l7 P; Y0 k' V% c/ } - BCC .End
( P5 o' s- B3 V# N( ~5 ] - SEC
; H3 S. v3 Q* a3 Y2 D# Q$ S - SBC #109 k! Y* J$ G) P* b3 d# _
- INC FC_Dec_Data_10+ G& }. a& M# m- o
- BNE .Convert_10: T% q$ |7 o9 C
- .End
3 `' z3 B5 [/ k+ n0 P: K - STA FC_Dec_Data_11 K* ~" N2 w# i% A/ D# O
- RTS& r/ ^$ F& E+ `/ m* e7 y
7 [0 J( L" q q x) ]- ;----------------------------------------------------------------------
t+ f; g" y4 }4 h1 X) u - ;显示曲目信息
& V9 \" W9 O0 `! { - Music_Info_Display; X' W% n! w( H. j
- LDX FC_PPU_Buf_Count' b" u: I5 v- M2 i+ Z! m) J
- LDA #PPU_WRITE_MODE_CNT_LINE7 x6 {$ B' M# c) Q
- STA Use_PPU_Buffer,X; k" x4 h* }) f& ?6 |
- INX
0 O0 g! m( X; x! k# L - & h; T2 ~2 F1 F. o# ?2 H0 w
- LDA #>MUSIC_INFO_POS
: i/ y J7 s9 u - STA Use_PPU_Buffer,X
% o7 p! q2 e* c. V- Z - INX
: r/ H5 y- z1 V# E+ { -
% d O* @ q' I$ v1 U - ;居中
) J1 p `) S; c4 } - LDA #<(MUSIC_INFO_POS & $E0) + (32 - 5)/2
! H, F w. A; E - STA Use_PPU_Buffer,X
; |( B3 `! l/ n - INX
; I) o9 \1 i8 a; p -
. L: x1 C0 n t" `8 i( ? - LDA #$05
, ^, f! p( N0 m# i# n - STA Use_PPU_Buffer,X9 f2 p; B3 B+ ?9 ]
- INX
' A# Y6 ~& ^1 F# i& d - * H) z+ Z% d& U, f. d, L
- LDA FC_Music_Index
1 D4 u: c9 g% p( B$ \: U - CLC
6 U9 ]9 |- E. I' [+ Z% _" H' X - ADC #$010 [0 ~% R0 k$ N7 O. ^' b
- JSR Hex8ToDec* W0 D6 o! Q% p5 h8 l
- & U6 p, U( d8 g- g8 Q
- LDA FC_Dec_Data_10- ~5 k$ t7 b$ x j
- CLC
# Q3 u) Z1 x4 r - ADC #'0'
0 |4 K: z- [2 x9 j. S - STA Use_PPU_Buffer,X
% l$ K1 t# c3 ?; ]* Y3 k - INX4 B# r: g7 ]4 @- p+ K
-
" _; Q8 e$ O& D6 ]$ }1 j B+ p - LDA FC_Dec_Data_1
3 E+ F; z. W5 E% | - CLC8 j" B# a' A8 x
- ADC #'0'
2 [% t" z( u5 A6 [' }; P- }0 ~ - STA Use_PPU_Buffer,X
) k7 O8 S/ ?9 ~3 C - INX/ b: x" L' R4 K: ^: I
-
, T u) j" C& G* }( C - LDA #'/'0 O$ I% \( E8 x3 w
- STA Use_PPU_Buffer,X: E: y* S3 B# A
- INX, A! n& Q+ i" M% I3 d' D
- ) }# e4 o- ~' \; ~3 n
- LDA FC_Music_Max_Index
7 r# {( }& p+ P: K' Z1 R - CLC
" N# H( A" ^- ]. S9 K( W; v5 @ - ADC #$01
. `, X+ q0 m8 F7 A$ \8 ~ - JSR Hex8ToDec0 T/ D- P1 u' `7 ?- Y
- . _7 w* R5 l1 v: L# ?. Q, ]
- LDA FC_Dec_Data_10
- U) k; |: F! `! H, M, C: {# w - CLC4 b. w% C4 z" T5 }7 J+ |
- ADC #'0'& o6 S/ ]& l9 K3 S
- STA Use_PPU_Buffer,X+ `! V% @0 h! O5 a* J) ^
- INX
5 D: \! l8 t; v+ l3 o) a7 O -
t; r) _. o* F6 U - LDA FC_Dec_Data_1
1 P- W: K" z; h- M* i9 L - CLC7 d# j: Q1 ]& B0 O
- ADC #'0'
1 s; l; v2 g( H - STA Use_PPU_Buffer,X
6 x; \5 d( C( l* a- T! y+ E) T - INX
8 f' J8 _5 Y4 S8 [! q - ; {; A7 y% J4 l' Q' E: t+ J+ s( m
- .End
, R7 G* ]+ [, V" }0 i. R - STX FC_PPU_Buf_Count$ x* G3 u* D+ I l$ y
- RTS
( s( `* z0 d% h+ C0 M2 z: P - 9 w: d. v- s% O% Q- k. t* t- ?
- ;----------------------------------------------------------------------$ ~) Y6 x5 `6 C9 N) L" ~7 _! F& U& ^
- ;音乐曲目初始化处理9 l6 j: M; W7 ?) O. @; a
- Music_Init_Process5 J3 w/ A: @; v+ I" |2 x
- PHA
0 T* Z D. S0 a( y% U - JSR Music_Clear_Process
$ b; I2 b* s/ H% t - LDA #$1F5 Q [: k5 g4 q: q2 ]
- STA $4015
" c" m8 O& k4 `+ K8 F) N - PLA
5 I, l( u+ l% r4 ? - JSR Music_Init_Addr
% M9 p3 M6 ~8 t$ F/ B9 f, z - JSR Music_Info_Display4 n7 g9 r; Z7 M) o$ E3 `7 |
- RTS* X8 ?$ r. W% ~ D0 Z7 Z
3 c/ G) V3 K O L( ?, b& ~- ;----------------------------------------------------------------------# R* h. g# H$ B) p3 H
- ;音乐播放处理$ \4 U$ R- l; [* H5 h0 j9 B
- Music_Play_Process h- n, F% i7 l2 _. X Y6 a5 E* F9 z5 X
- JSR Music_Play_Addr
6 j+ B/ e9 H9 U, Z @9 Z+ [1 d - RTS) K1 H8 w4 H+ L/ h6 Z: h& q
# p, h, S X# z* S& j. o$ E9 [, a0 a- ;----------------------------------------------------------------------
8 V8 _3 N" m$ h( Z* s - ;音乐播放处理; e3 K/ Z; T$ ?5 e E6 }, ]: J& j
- Music_Clear_Process# f- z7 z* k6 ?4 U1 e0 p8 \
- .IF Music_Clear_Addr- {1 K- i0 @# m. _) {5 ~
- JSR Music_Clear_Addr
8 F, b U& C9 |) L1 s3 ~3 Z - RTS A' Y& `$ R, A/ }# W/ z4 P
- .ELSE
+ I F6 F+ [7 F% L* ]# T - LDA #$1F; q- D1 @' _* |2 K1 r
- STA $4015
: d- Y" v; n; @$ I6 I - LDA #$00
# i; N, _8 v2 d - STA $4010. ^9 f3 J% H* d( \# Z- l: ^
- LDX #$00
/ N5 p9 y' N1 a, l" w% v - LDA #$00
! r4 Z3 K) r+ l6 i: q - ! D& m8 b; ^1 k. W' c
- .Music_Clear_Zreo_Page_0$ Y6 |4 j# k' [ L" ~7 {
- STA $00,X
g- r+ _3 Y7 A% W3 w+ E8 p! e - INX
$ y& O) a/ z8 n2 a r( d% a. L - CPX #Use_Zero_Page_Begin
2 S3 Z" K4 D; l; M% L* o+ c - BCC .Music_Clear_Zreo_Page_0+ Q# r1 _* d& ~5 K4 h
-
) y; ^- C. a, L- p1 }- F# }) {' |$ r - LDX #Use_Zero_Page_Begin + Use_Zero_Page_Size; B" X8 P9 }& H$ a# i( a
- .Music_Clear_Zreo_Page_1
& j- @* g( |- `& g' e: J - STA $00,X2 ?0 [$ b; G; f6 D6 f8 c1 q
- INX
+ `; M5 q& u6 z3 V- t3 I - BNE .Music_Clear_Zreo_Page_1
/ ~2 r& |( y/ I- Q) ? -
* l# K8 ]4 p2 T+ Z6 G - Music_Clear_Process_1
* L8 R% h! c4 u6 ~# d/ z9 W3 g( x - STA $0600,X
: @# K/ j) F) v; \; T; C. { - STA $0700,X, S( b. J- ~+ `
- INX
% u+ _' H# ^ w4 h6 L& N - BNE Music_Clear_Process_1- t1 Z, ~5 I1 F7 Y [
- LDA #$10
/ e6 m( j' S+ m; y2 T4 i - STA $4000
8 D7 T1 Y6 u+ q3 G7 f; n; k9 X - STA $4004
$ ]3 i, G* d6 W; H+ C - STA $400C# H5 Z- R; R1 Y
- LDA #$00+ |- O' D4 o( i; A3 @
- STA $40084 l- Q' m) e5 J" A" c+ w
- LDA #$0F
/ r, Y8 c9 G8 ~: D - STA $4015
/ R0 R. B4 Z+ w8 e; L' _; u - .ENDIF
2 ~& j2 P6 B+ b) O$ {, E8 C, R - V& f: S5 k4 e0 S: S' B
- RTS
3 s) g. N6 T) o& z9 b: v
# {& [& @" k7 S6 |- o- ;======================================================================
& s: t g9 H0 I/ T6 i* u - ;重启处理8 V9 Z$ x0 R6 o- [8 ?& y
- Reset_Program
% h0 X* W: v( ~6 l) N - SEI
) W2 D. S$ ]% H' s - CLD
0 j% \/ T# m. C7 ~6 S" Q - LDA #$00/ E- m2 ~: J- H3 m8 b1 l
- STA PPU_CTRL
/ t, X9 _- Y4 i3 w4 h+ X9 N% x1 ] - STA PPU_MASK3 T: a* @6 y, ]$ m. ?! r* ^8 f
- STA JOY2_FRAME
' |, y8 F9 ^& L z; ]9 }, G6 @ - STA APU_STATUS
4 I! y" F# ]" @ - V: G H5 w: J v5 n
- ;等待屏幕准备完毕% w" F) ^$ T3 p
- LDX #$026 k7 i; h) V( W$ l |
- .Wait_For_Screen_Ready
% `3 {1 y2 f: ^ - LDA PPU_STATUS
/ B5 t5 }# B9 D( m; D4 E' Z' ] - BPL .Wait_For_Screen_Ready
# t( Y4 w. y1 X- g" t - DEX
; W- z# J+ k! U - BNE .Wait_For_Screen_Ready
P; {7 z' ~4 G - 1 q3 `0 n& ^3 I3 m! G% j
- ;清空调色板, j2 @6 Z2 n1 h( W+ h6 t9 ^
- Palette_Clear- ?. y' @3 e- B! G
- LDA #$3F) I6 ?2 R. d0 Q$ z
- STA PPU_ADDRESS
: a& M8 D! a' P/ J - LDA #$00
" u* o: f6 ~" `8 a; T - STA PPU_ADDRESS
, J. F* D. l- I+ q$ t - LDX #$20& ~, g) o; s. k5 q) R5 W# F
- LDA #$0F
9 _9 i" f4 P9 o* q/ M1 k u - .Write_Data
) o% x. o/ S/ ? - STA PPU_DATA
, _ p' h; n. V9 R: ^/ Q( j3 R - DEX, E! p: V! E5 V, h. v# G) @, S
- BNE .Write_Data, E/ j( M/ C, }. f" k3 Y6 t7 p: X% [
; \. P$ \. l( q3 H- ;清除声音 $4000-4013
9 b2 C2 [2 j1 g4 [5 O# H - LDY #$14
" y/ \& c8 S. p" B" T; j. t1 d - LDX #$00
& x# G- a% C( k3 ` - .Sound_Clear
% `+ M( ?) H" F1 g - STA $4000,X" P" ^; R8 d" G# m. g! p- Y7 M
- INX6 B# N+ G4 r1 i7 z- n P
- DEY
6 { U7 s' v$ X: F U( P1 G - BNE .Sound_Clear
$ S, Q2 x9 P6 B -
. {& b; j# r( v* H7 w3 R( Z - ;清除 RAM $0000-07FF
. m6 s3 B) _9 t6 c9 } - LDA #$002 B; S' z. |( d, N) E
- STA $00. ]% Z+ o% q2 d; y' R7 T
- STA $01" y F8 |& \& V: M
- TAY
: S6 l4 s! z( d, L% G) v7 }9 L - LDX #$08: c4 S* \6 G% p6 R6 n: q
- .Memory_Clear
+ `: _8 K. b& R( [. }8 f - STA [$00],Y
3 P; x# y5 k! L, x. g% @ - INY+ j# g4 m) x J
- BNE .Memory_Clear
+ k" y$ Q7 f! [+ \" u1 r2 ~ - INC $01
9 ?3 M& N& [2 T" r# v - DEX
" a' X5 O2 G( [ n4 Z - BNE .Memory_Clear" Z8 Z5 Z3 _# \6 Z5 R; m. B% R p
- # t U6 i7 m9 a/ r
- ;精灵缓冲初始化
: A& J3 g- E% L - LDX #$00
( E3 u/ j% l, c7 K" E - LDA #$F8
3 o3 A9 U" m- G6 ^5 f0 g( { - .OAM_Clear
9 c! C6 f Y4 n! X - STA OAM_DMA_Buffer,X
3 J" u) Z# x' C; F7 g( Q0 b1 U" M - INX
* q! H+ u" N+ | - BNE .OAM_Clear1 @; R3 Q! E/ l/ o- B+ Y; Z8 m
- , c7 K! U" `5 J8 b9 O2 r- e7 Z
- ;栈指针初始化
/ _7 G' ^+ a5 \; [% v3 |/ n% N* _ - LDX #$FF
5 u$ i3 |5 W9 r1 l0 b) A+ [4 ` - TXS6 P/ [) W/ F% }. R$ S. Z
-
+ ]( {3 ^" m9 K3 m% e1 \9 b - JSR Nametable_Clear;命名表清空
/ C& \% F/ p* L; v4 m+ I - JSR Palette_Init;初始化调色板缓冲
, m/ u& Y0 s' {+ l/ w3 @9 S% ^( _ - JSR Static_Text_Init;初始化静态文本
" \/ I* C/ U% h5 f# D -
' j8 T" @" R* X9 { - LDA #MUSIC_ITEM_TOTAL - 1# c- K8 o% w( ?/ f; E
- STA FC_Music_Max_Index2 a: G5 l; _7 x6 d: U T( Q
-
# h/ |0 ~. W( h( t4 ~7 U - LDA #$1F
+ g1 W& W- b5 C& ? - STA APU_STATUS
8 m. ]/ A7 v3 H# a7 H - LDA #MUSIC_BGM - 1/ |8 V" ]5 r+ ~6 e: U" a) d" k/ W
- STA FC_Music_Index
; f: I' s# f+ r0 v; L - JSR Music_Init_Process;音乐播放
* h* O% y/ Z) `2 f! J -
/ g4 R; m- ^: `( t( u( P9 v8 ? - ;设置屏幕显示状态缓冲(当NMI处理时控制屏幕显示状态)
: H! O& ~2 P7 T3 E - LDA #$1E
; t$ I% C# ]- H5 ^ - STA FC_PPU_Mask_Buf; l1 \2 h) R$ K
-
& `7 h* w! ], ^% j% i! L - ;启用NMI处理2 w h) h. K5 Y5 u% _
- LDA #$80 w8 C6 B+ d6 D8 |$ \$ g
- STA PPU_CTRL, v0 L: P: V; E% }
- @3 S8 ~4 X/ Y9 J
- ;程序循环, 剩余工作交给 NMI 中断处理6 Q1 J' ~3 Y" S& Y$ O- J& d
- .Loop
# Z$ I" Z; ?& ^7 m$ c* T - JMP .Loop& F6 |7 v# ]& r. s% v/ p: \
& H8 ]* q) l- O0 Z+ V. M8 L- ;======================================================================
: l& I3 e7 ^1 ]& v9 B# Y2 p - ;不可屏蔽中断处理: y9 t2 }8 l& e Y0 ]" R- ^
- Nmi_Program
& @) _7 R( R: T6 K* _% |$ z D( n, U - PHA
: T; @, K; E& s8 z3 h. x+ f - TXA
1 t& Q! _" g- w) ] - PHA
& ^1 u2 a0 l) }/ ~6 {% ^/ N9 j - TYA2 W4 _$ L; r3 `" n& Q
- PHA% \1 n8 [% \; T- r
- 0 s" ~0 m6 N5 w" X
- LDA PPU_STATUS;读取使得 PPU状态寄存器复位
e& \% L4 h. {5 u- |7 q+ t& u -
P7 U1 K0 N& p& p - JSR FC_PPU_Procrss;PPU处理
9 B% p' a" V v# `/ D- k -
% a% P7 r5 d, ?& L' c - ;精灵内存更新
7 b2 }: V/ t& D - LDA #$00
& B& `, D+ F* @/ a U1 m W6 | - STA PPU_OAM_ADDR
$ }' P6 j2 c7 B: J. [1 i4 ? - LDA #OAM_DMA_Buffer / $01003 N$ g+ S( ?! l3 Q
- STA OAM_DMA2 _$ X/ v& l$ M& K, a: y
-
! {! e$ O) ?3 j1 m1 h5 P$ ?+ t" q - JSR FC_Gamepad_Process;手柄输入处理
* E C9 {4 u( x& M - JSR Music_Select_Process;音乐选曲处理" ]' A# f1 d7 K* t8 c
- JSR Music_Play_Process;音乐播放处理8 t$ {$ \/ R: O1 u$ X
-
" T1 z# ^1 s3 j' ~ - PLA# X5 ], R- U' [9 ~; o2 N7 @" ^) E
- TAY
5 W/ B! Y) n! `' F+ s5 J I - PLA
- @) l1 q( o5 W# o3 m1 P - TAX
; u' b9 E* M, T5 b4 ^$ o6 J: ~, p - PLA
; {( d4 a: ?! i0 C
& }/ Y5 l) h6 P, A2 \7 y+ t8 N- RTI# y: h+ L$ L) J
9 l# ?/ |- l. `$ c( i- `) D8 [4 \, M- ;======================================================================
* h6 Z, T- ^/ z5 f - ;请求中断处理
' H! Y2 G- G; X( F% m: [4 `; j" }4 M - Irq_Program$ X+ ~ d0 N" w
- RTI
; e8 O7 j+ d7 A! t0 Q
# U+ [1 s- `5 N2 ?/ e- ;======================================================================
8 G2 V U4 e4 E! m - ;中断向量表1 J) J1 E/ r6 D& Z3 m0 M: Y
- .ORG $FFFA
/ Z" M: e' Q2 U: s" |; Q% ~ - .DW Nmi_Program ;NMI触发时执行% c2 |' Y. ?' \
- .DW Reset_Program ;载入ROM时最先执行3 M( v. K9 U! P2 b
- .DW Irq_Program ;IRQ触发时执行$ { d' H2 e# e O. @
复制代码
' \% Z4 v7 K' C/ Q
$ G4 Q# F! A" N7 [: \! s# |' Y A* Y9 D) K' v# |
https://gitee.com/flame_cyclone/nesasm_3_2 |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有账号?立即注册
x
评分
-
1
查看全部评分
-
|