|
- [code];[FC音乐][MMC3 IRQ]
! S7 d: x6 O8 m6 H - ;FlameCyclone 202307106 @( Y+ b8 l S: x5 \
- 0 C J* R! p9 q- D$ a4 b
- ;文件头; Z# w0 a7 E3 F* V
- ;======================================================================
7 D0 Z4 m6 d7 C/ C3 B l' A - .INESPRG 4 ;16KB PRG 数量- j2 v7 A/ J+ l+ K
- .INESCHR 1 ;8KB CHR 数量
( t( X2 S. k2 q* _2 n2 B6 P - .INESMAP 4 ;mapper 48 K( Y! y+ g; R5 N7 r, V2 S
- .INESMIR 1 ;命名表镜像 0水平 1垂直
) f0 r9 c4 D% r5 B2 { - , m3 q% `1 Q+ S- H4 S7 M
- ;必要条件& V( J6 Z* g. p/ R W
- ;1.持有CHR ROM
, E3 i, w- j, m4 B& O( o% h - ;2.背景Tile和精灵Tile必须使用不同的图案表, 如背景图案$0000, 精灵图案$1000
2 ?; ~& z2 l3 X* c - ;3.精灵内存(OAM)不为空
) t) r, g9 }; n; j8 S
& O/ L0 {5 O* l- }. M, z- ;==================================================. D( _ z V8 T$ @. t
- ;NES端口常量
% I% }+ E/ J9 K' n" z7 D - PPU_CTRL = $2000 ;PPU控制寄存器: N. `$ q) p, T0 B2 z# a' J3 d
- PPU_MASK = $2001 ;PPU掩码寄存器1 n5 _8 F1 C+ v A" F2 Z/ }; J
- PPU_STATUS = $2002 ;PPU状态寄存器:读取后PPU_SCROLL和PPU_ADDRESS被复位,下一个写到PPU_SCROLL的数据是水平的,写到PPU_ADDRESS的数据是高位
& ~) d. k* s2 K - PPU_OAM_ADDR = $2003 ;精灵RAM地址:用来设置通过PPU_OAM_DATA访问的256字节精灵RAM地址。每次访问PPU_OAM_DATA后该地址增加19 V6 y. F" U" r) p3 F
- PPU_OAM_DATA = $2004 ;精灵RAM数据:用来读/写精灵内存。地址通过PPU_OAM_ADDR来设置,每次访问后地址增加1
; A, {; T q( `' _ - PPU_SCROLL = $2005 ;屏幕滚动偏移:第一个写的值会进入垂直滚动寄存器(若>239,被忽略)。第二个值出现在水平滚动寄存器 7 y$ j1 h& Y( s: a0 N
- PPU_ADDRESS = $2006 ;VRAM地址:设置PPU_DATA访问的VRAM地址。第一个写地址的高6位。第二个写低8位。每次访问PPU_DATA后地址增加
* ?- u, a. B5 p - PPU_DATA = $2007 ;VRAM数据:用来访问VRAM数据,通过PPU_ADDRESS设置的地址在每次访问之后会增加1或32
. L+ l( ?2 d M' k% p( k) `: i - OAM_DMA = $4014 ;DMA访问精灵RAM:通过写一个值xx到这个端口,引起CPU内存地址为$xx00-$xxFF的区域传送到精灵内存
- u/ ~ U9 q8 p - APU_STATUS = $4015 ;声音通道切换
8 |$ I4 G: x6 K. W/ n! q2 S2 J6 v. d - JOY1_FRAME = $4016 ;手柄1 + 选通
, r& ]" e5 k* m! d' F - JOY2_FRAME = $4017 ;手柄2 + 选通. _- ^# x5 a6 }% m2 Q4 H& g" K! t5 J! ]
9 U! @3 I0 C/ x3 g4 f2 H* G6 Z- ;==================================================% m8 Z; F9 h, Y; `8 e6 i6 O* v
- ;MMC3端口常量
+ G0 Q' h L. R% L - MMC3_BANK_CTRL = $8000* I0 E- ?) o; z2 `: F6 Y$ b2 h
- MMC3_BANK_DATA = $8001
% m. T9 X; r3 m2 E: M9 N - MMC3_MIRRORING = $A000
( | B; H! I. j# g; { - MMC3_PRG_RAM_PROTECT = $A001
- y) F2 I9 z/ y3 d8 Y$ w - MMC3_IRQ_LATCH = $C000
+ K( E5 a2 \+ u+ S - MMC3_IRQ_RELOAD = $C001
' B5 ]7 p' z/ p. s& \, t - MMC3_IRQ_DISABLE = $E000
- g4 C1 B. c2 g( w - MMC3_IRQ_ENABLE = $E001
: Z: x3 i; E" B( P1 | - * d' K4 [1 _6 E
- ;==================================================
* Q) E# w. k4 z: k! D1 V0 { - ;程序块配置0 W: t! n! n5 J2 E9 Y* o+ H) P
- BANK_DATA_MASK = $07
$ y9 M7 G8 } N' { - ;--------------------------------------------------
2 J; b5 w0 d+ Y - RESET_BANK = $07
# V, ?& Q& w& x& m8 W- g# I3 K - RESET_ADDR = $FC00
" _3 z- X! d* N - 5 M+ R. D+ a( T. e0 R
- ;==================================================1 _8 v0 C! H& r) {
- ;图像块配置
4 ^9 ^! L$ r0 m( _7 \9 j: a - CHR_DATA_BANK = $08
! g- n& ?" S Y0 C$ V - " _- A4 h. F, o1 F
- ;==================================================( M$ u# y3 L+ g5 P
- ;零页内存地址配置4 M+ m# X- k' d
- Use_Ram_Addr = $80
. s) K2 h0 ]- o3 \; k' p n - PPU_Ctrl_Buf = Use_Ram_Addr
4 B$ K1 k) W( }+ j2 Z% g, U) V$ Z - PPU_Msak_Buf = PPU_Ctrl_Buf + $019 ~/ ]* E1 q8 c+ n! u! j( G
- PPU_Scroll_H = PPU_Msak_Buf + $01- y( r2 |. _, K* d/ y/ C
- PPU_Scroll_V = PPU_Scroll_H + $01
; S: K& _; o$ Y% ]- | - FC_Data_L = PPU_Scroll_V + $01# x3 h7 H! h+ n$ {
- FC_Data_H = FC_Data_L + $01
. d8 J! F# C/ i1 L6 o# K - FC_Data_Buf = FC_Data_H + $01/ P6 ^3 S8 N8 i- Y+ P' U8 e
- ;==================================================1 j, n, ]6 S* V9 m2 f6 e( Q
9 B5 w& v, f7 B$ g$ z! K0 E& o. a- GAMEPAD_MERGE_FLAG = $04* V/ M* d U% Q% \5 d4 [' A, Z
" \1 Z0 o5 o9 E& P S- Gamepad_Keep = FC_Data_Buf + 1
3 `1 {6 N5 K# C: K. C - Gamepad_Once = Gamepad_Keep + 2
: f4 x+ t" K+ ~$ c& h( c" I6 u - Gamepad_Temp = Gamepad_Once + 2
0 H6 s6 c2 t4 }: d0 w; m b6 T - : r% k& f: X# l( A: p2 f2 f. `
- Gamepad_0_State = Gamepad_Temp + 2
1 K. v t6 K& {0 [8 }5 B1 | - Gamepad_1_State = Gamepad_0_State + 1 K( r1 A. y ]
- Gamepad_0_Value = Gamepad_1_State + 1
5 n6 [9 T3 L z! A - Gamepad_1_Value = Gamepad_0_Value + 1
/ {2 p) `+ ]! R( q0 O0 g0 k - Gamepad_Port_Value = Gamepad_1_Value + 1
6 e5 `' o$ k$ ~% [% g! d$ e - Gamepad_Merge = Gamepad_Port_Value + 1- }3 ]+ `# B6 l
- J+ d9 c' S% t6 @/ u$ z+ {- ;================================================== T# p6 q4 x$ i1 @% E0 Z
- IRQ_Index = Gamepad_Merge + $01
- \1 t; M$ b! a6 F& v( k# m* c - ;==================================================
6 T M& s# S5 ]0 h% p/ D% b - ) O4 e* C1 z7 c( g1 Q
- ;CHR图形数据# p/ S* t0 R2 ] ^; x6 P
- ;==================================================
: A0 t8 D% e% P- j) n+ k - .BANK CHR_DATA_BANK
$ @% H3 i# J! q. d/ K/ l - .INCBIN "chr_bank/chr_data.chr"
5 X& i, P/ ?$ ]7 j- X - 8 Z. Z# [/ w) g
- .BANK RESET_BANK & BANK_DATA_MASK! p: ?; {# _6 O' m
- .ORG RESET_ADDR, q. X2 s* k; `1 R5 N
-
; w0 K; \+ ?- @7 b: S( S; S+ p - ;--------------------------------------------------: l7 A% M* F% q1 [1 F4 l3 x
- Attributes_Data+ H' K4 W& {& Z% o" y
- ;命名表属性+ f6 n: u5 j4 e7 N$ X( Y
- .DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
% ~) V! h: `) p. L2 G, P - .DB $50,$50,$50,$50,$50,$50,$50,$50,$FF,$FF,$FF,$FF,$BB,$AA,$AA,$AA
; e( ^# J0 v* m' u) t& H+ L. v - .DB $0F,$0F,$0F,$0F,$0B,$0A,$0A,$0A,$AA,$AA,$AA,$AA,$AA,$AA,$AA,$AA
9 v' @5 ]) v i2 l7 _' m. H/ K - .DB $AA,$AA,$AA,$AA,$AA,$AA,$AA,$55,$55,$55,$55,$55,$55,$55,$55,$55
p* w+ B% a2 u' |. { - ;--------------------------------------------------' g# K0 T# U' k/ h$ _
- ;调色板数据9 t. \+ [9 L. p4 `
- Palette_Data3 A! f; g6 Z1 O( V
- .DB $0F,$27,$20,$0F,$0F,$24,$20,$0F,$0F,$21,$20,$0F,$0F,$25,$20,$0F
: p$ H0 q+ T1 ?% i/ L - .DB $0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F
( K8 n. e6 @' F: I4 f' R" R - 8 h1 ^2 @. ~; h2 `
- ;==================================================* {4 O2 i8 @5 k J: \" J% A8 S5 |3 c6 \
- ;命名表初始化
9 n. e* Z6 | I i - Init_Name_Table, ]4 y- M) s$ X/ W
- LDA #$200 p$ h* q% l& H
- STA PPU_ADDRESS
- E& |4 W6 |. ~, [ - LDA #$009 E' C8 C( i0 R8 y7 [0 ]) Q
- STA PPU_ADDRESS
( ?; @. {: W2 q& k i2 w - LDA #$008 d2 I# j$ p: Y4 J3 j' R
- LDY #$00
/ t, p0 Y+ b( u# j- h) a b - LDX #$10: B# C8 n* X8 U2 c x
- Init_Name_Table_Write( W% @# `. T% p
- STA PPU_DATA3 Z$ @7 ?" i2 W( j
- INY& q4 b) v# q- D# Y2 f
- BNE Init_Name_Table_Write
" c9 m2 K* d: k% w1 p$ C - DEX! P& I9 ]; g0 N- G, M. S
- BNE Init_Name_Table_Write# n3 D1 R8 V+ ?+ H( I
- RTS$ T% K$ B* H0 c: u/ A0 m
- 7 K" x3 z6 Y/ f- ]' w0 }) h
- ;==================================================
A/ ~1 c8 e; }; K6 M! Z - ;调色板初始化/ U$ ~$ \, T. {* o- B( w- d
- Init_Palette: K7 ]7 L6 p, s7 L
- BIT PPU_STATUS* u! h9 A5 @ ?0 M! ^( {8 p
- LDA #$3F
9 f7 k% Q0 }# \, c8 O - STA PPU_ADDRESS
/ S8 F$ S; t }, Y. l+ P5 ?% v5 B, P - LDA #$007 I% |. M0 j4 }" b D! Q% q8 M
- STA PPU_ADDRESS
2 V" a; J! x4 P9 M6 c9 F - LDX #$00. H) B' o9 D. w* R7 Q @" ~
- Init_Palette_Write
/ S1 C, q# G8 l6 _. x - LDA Palette_Data,X) Z& `3 i* f2 c8 ]2 V# ~8 m
- STA PPU_DATA. x v, P1 N+ |9 e' V
- INX$ ]& j1 ]+ V+ f4 m
- CPX #$20
+ i! g% ?% N, ? \9 p - BCC Init_Palette_Write
" @% J! X2 |) U6 Q+ v - RTS2 C; b( \# d8 j0 L
- & C. e0 C: i: o& f1 o
- ;==================================================
- v' b# k$ E5 c$ i' ^ - ;设置命名表属性
5 M' e5 ]7 e+ d* @$ z3 k - Init_NameTable_Attributes8 F* A& s6 x% W6 D+ b: L
- BIT PPU_STATUS
! L, R) {3 h; y/ f$ \& }$ n - LDA #$23
) L9 l$ ]2 @1 g! [: U. A - STA PPU_ADDRESS/ P; o7 V4 a) l* o6 L
- LDA #$C0; b) R4 H1 f: h$ d
- STA PPU_ADDRESS+ C2 I( F2 z; J Q1 \/ `. R
- LDX #$00
u; Y6 r% d% w& J- C0 a/ O5 ^& V! L - Init_NameTable_Attributes_Write7 f& \8 R- ?' A2 V. J: @. V/ q1 }" J
- LDA Attributes_Data,X
- A# h5 \ w7 t! ]( R( c2 w+ f - STA PPU_DATA! n; }& d/ _* E/ {
- INX; M0 C8 }& T4 r/ o2 o% B1 Z: I
- CPX #$40
6 \# {; m3 i- F" w+ y. R - BCC Init_NameTable_Attributes_Write
# }: w% J& k7 K4 X4 g, b# x - RTS Z; B6 v; e! m" s8 f9 ^
' {, O. a1 f0 u# ~- ;==================================================
! W9 s' O" I( b0 P - ;初始化命名表文本
$ Q; u/ F8 ?, L/ p3 \ - Init_Name_Table_Text
- J$ K4 t$ r! I5 O- L0 g. y - BIT PPU_STATUS' J' R* c: H$ z: _2 {! }
- LDA #$202 o+ a+ t+ U7 u- \2 q
- STA PPU_ADDRESS0 |, R5 @/ B$ R! J( L
- LDA #$00
) x3 H! X8 n) r$ K' p) D/ n. f - STA PPU_ADDRESS
1 ?" N4 T0 y( g1 a% a7 A - LDA #$00$ r8 |4 ?+ K# y* }
- STA FC_Data_Buf
5 b! I# t! k! G8 T6 r - LDY #30
6 _& x/ L9 C8 D* `( p - Init_Name_Table_Text_Write& U! h1 H8 Y- [8 j+ y4 k" F
- LDX #32
( S8 s- F, V7 S, H6 Q - Init_Name_Table_Text_Write_Char
. S) d( `6 u' R5 A - LDA #'0'
, n/ u: E! M4 W8 J- c - CLC
+ f6 d/ W6 f9 Y. g - ADC FC_Data_Buf
: _/ i5 ?3 j# B8 {0 Q' n8 @6 a - STA PPU_DATA
* P8 u* \' B: U* N. L, q5 i - DEX. V$ a |) B5 y1 ?. U4 v6 u
- LDA #$14) l, \. J! j" n* V6 L! B
- STA PPU_DATA
+ J' a3 l% {1 @* ] ~6 Z - DEX
6 R/ z6 Y- k# {- | - BNE Init_Name_Table_Text_Write_Char
( d* k" [( K. c. y3 F: M- Z - INC FC_Data_Buf! M9 c. ~8 n7 L0 Y C( X7 u
- DEY
; q! n w0 l! @ - BNE Init_Name_Table_Text_Write+ {. ~, D9 s* ?' Y
- RTS
+ m9 A3 h: u! T" Y - ( t: L/ v* x. V% R$ l2 ]0 _
- ;==============================+ ~9 O; | S) T$ G ^
- Init_OAM_Ram;初始化精灵内存9 d& j, l; W; s% f! L2 w
- LDX #$00
1 s# T) [4 {2 _2 }" t - LDA #$00
) N6 U* n: Y5 S) e - STA PPU_OAM_ADDR2 f- l0 V7 `. ~; p j
- LDA #$F8
+ z8 z( Q* r/ @' Q - Init_OAM_Ram_Write4 p: k2 p! {) {9 r, c/ F
- STA PPU_OAM_DATA
& ~8 `' C$ k q2 S; s: ?$ i- U* G' G - INX3 H6 j" f* h) V' E
- BNE Init_OAM_Ram_Write
; k' V) n% \0 N) C, D- R* u - RTS0 q& C6 Q1 s; e, Y6 R+ q" e
- . I: P7 x2 j7 o& I: v J
- GamepadProcess;手柄处理
! {' Z0 j+ T$ a+ [) x8 z4 U - JSR GamepadDatacan
7 Y' s+ t0 ]! L6 P - LDA <Gamepad_0_Value0 y$ r- l& X# v# u- q! H* i
- STA <Gamepad_0_State s' g& {2 H, k+ ?5 _/ h" L
- LDA <Gamepad_1_Value0 P. L# j+ K" t# O; I. ~
- STA <Gamepad_1_State! m; i1 X, |, l3 G
- JSR GamepadDatacan( o8 q8 A! D0 ^3 ?1 @) V! k
- LDX #$01
6 J6 z' ~* d. ^7 l3 \( @. E - GamepadMergeCheck;合并手柄输入检查
3 Y6 e7 g% d( p( Y, m: R - LDA <Gamepad_0_Value,X
% v, A7 M4 P" E) j - CMP <Gamepad_0_State,X3 X6 C/ Q# Y! ~( n3 w1 K& d, S
- BEQ GamepadMergeInput# h+ k' ^6 P3 Z: g8 s7 u) m
- LDA <Gamepad_Temp,X" {! z( S3 F7 V3 i3 Y4 @* p
- STA <Gamepad_0_Value,X# g+ L& r0 s/ Y5 n! N1 v; C5 a
- GamepadMergeInput;合并手柄输入
- q4 K* t' c% Y1 h - DEX2 o% r a- Y5 q# @! p% A, S4 Q, p
- BPL GamepadMergeCheck% c5 J X( y A* c* F
- LDA <Gamepad_Merge
6 g, h) u2 S6 a - AND #GAMEPAD_MERGE_FLAG! M5 M2 B' ^! P9 {: t$ q+ A
- BNE GamepadStateProcess6 m: c q' G5 E% j% p% Y
- LDA <Gamepad_0_Value& q4 u, n7 B/ y2 Y( \" _
- ORA <Gamepad_1_Value
5 q& Q' g* a, O0 C- u& T2 | - STA <Gamepad_0_Value
1 n6 B5 H2 P5 ~ ^1 E! G - GamepadStateProcess;手柄状态处理
3 M! X$ g; p# e$ ^ - LDX #$012 p0 n, e" @0 L' w% A( h
- GamepadStateSave;手柄状态保存9 z0 P1 a1 M* d/ |7 I1 \
- LDA <Gamepad_0_Value,X
. H0 }, { v. I* q8 R( Q. a* y - TAY, ^4 z" C- P2 r Q2 u2 J9 ?
- EOR <Gamepad_Temp,X
. q+ N, u. ]7 }6 K- w6 d; O - AND <Gamepad_0_Value,X' q( U. h; q; b! ]6 w, Q0 A, m
- STA <Gamepad_Once,X
" L9 q! W# ]" q/ P+ ^ - STY <Gamepad_Keep,X' k, f2 ~* N. N. d; I. r) U
- STY <Gamepad_Temp,X0 F% n: h. g& ^: k# D* ~8 I
- DEX2 D6 O9 o9 i5 Q' X/ X- N( K
- BPL GamepadStateSave3 x: l8 o7 k0 o: s" r
- RTS
) f! {8 U. P/ W2 [1 @, U
* ^5 ~# E: D3 k& A( q+ {- GamepadDatacan;手柄数据扫描
; z, b% O& [2 R: I0 j! |& A1 I - LDX #$01# @% r H: ]' e* N
- STX $40169 r' k) S& q a. |
- DEX( T# N I% u% f4 ^5 d/ ?% s6 t6 b
- STX $4016& I# @5 J' ?" y8 P% [3 ~ Y
- LDY #$087 M: I! O) T* i4 U! A0 T$ R
- GamepadPortScan;手柄端口扫描% d- E8 f |" j1 N u* B
- LDA $4016! p; i9 w. i, F& }7 d) ~# g o
- STA <Gamepad_Port_Value
0 z* t0 l7 ?; l) C- H% C* H) q; i - LSR A7 a/ o$ ~% R$ g
- ORA <Gamepad_Port_Value
' n. d+ A9 S9 g4 S Z" ?% a7 ] Y - LSR A
/ O7 E! v$ p/ o8 F& v- |% O P - ROL <Gamepad_0_Value
9 v$ m6 P; X( W/ }/ U - LDA $4017
2 ?7 `3 k1 ?3 n- E/ K; y' T - STA <Gamepad_Port_Value
0 k( E& g0 j% d6 a9 m# X - LSR A8 u+ M( t" @, \ n& s
- ORA <Gamepad_Port_Value7 `$ E; |' `6 g+ {. Y' R
- LSR A
" e4 b4 J# {1 I, J! U6 i0 x - ROL <Gamepad_1_Value
, I/ c4 ]. `9 a* Y$ o0 V1 q - DEY
; F/ K$ T2 F) g k3 T8 F+ N e - BNE GamepadPortScan
3 d' U- a4 l6 X5 k5 V/ C' \, l8 O. ~ - RTS0 u+ N5 _; I8 W( ~( p' M
-
- G4 G' h3 G* I9 Y5 _ - ;==================================================! V4 [8 p3 r& @" [0 I% |' E; d# x
- ;PPU处理
4 E$ k2 v- `/ v) {; r - PPU_Process
5 I& f7 k$ ^, v/ U( t5 K - LDA #$004 ?* A* F+ p$ |7 u+ c: m! P3 H
- STA PPU_MASK+ @, T3 U3 s" L0 L( U1 O
-
) m6 D2 l2 r' E) s! M' b1 ^7 m8 Q - BIT PPU_STATUS" G; _3 w! K# X' x
- LDA #$20
1 w2 I% y- I6 q- K; P" N - STA PPU_ADDRESS
% D: F- W# T% B+ Z0 X6 U$ [) u - LDA #$00
z S% h$ J( D! ?* z& w4 \ a; P9 a - STA PPU_ADDRESS6 N! c; G3 z( s
-
! N0 Q5 }+ S9 `4 d& Y - STA PPU_SCROLL
, m ^2 o8 i$ f3 L) \ - STA PPU_SCROLL4 V& T6 u* V9 P1 z2 w
- % n! \# p8 ]# i! [) D3 s. M' T# B
- LDA PPU_Msak_Buf
) p1 R {5 B4 E# L4 u - STA PPU_MASK
0 T9 `# v: [! B3 u
/ I M. U! }! W- V. @/ S- RTS
2 r8 D0 l1 Y, s4 b0 ?/ r% `, S - ; s' b' J* d3 e
- ;==============================
/ R, y5 j/ j- Y - Time_For_Vblank;延时等待4 I& H' C4 q" m4 G. b, B: L" K
- LDA PPU_STATUS$ A4 {# b& M0 H+ ?8 o
- BPL Time_For_Vblank
9 @3 a$ Y6 G7 a3 M1 Z - RTS% o" q, ?0 ~7 l4 a8 Z& l7 \
-
. j1 D$ n, K8 Z3 W0 a0 m - ;==================================================" E c' R$ Q7 Q7 \8 K* Z
- ;初始化MMC36 k- }/ Q# f1 x% `% c! r7 F
- Init_MMC3
; h6 J9 O7 a o0 [ - STA MMC3_IRQ_DISABLE
$ ~8 l. v3 S" M8 n, w: y9 K& _ - J; f4 P. C1 U1 R7 l, P
- ;设置MMC3水平镜像1 f8 y, [& |+ w9 G; w
- LDA #$01
+ H" n' Y( u# l% k# x6 v: \! s - STA MMC3_MIRRORING) n, D3 Z& m8 a8 @! u
- u) f0 I$ Z% ?
- LDX #$05
' _" h& g# B1 w( F$ C2 c - Init_MMC3_Chr_Bank_Write, h4 P: A1 n4 T. Q& [" Q. O
- STX MMC3_BANK_CTRL A) n: z# \) O/ i, P7 k* F, @
- LDA MMC3_Chr_Bank_Data,X
" F3 H. T2 A! D" s- x7 L# `9 _ - STA MMC3_BANK_DATA
0 Z3 n" w2 G4 ^. w3 h - DEX# P9 n; t6 z p1 j
- BPL Init_MMC3_Chr_Bank_Write \' P# O% T9 n
- RTS' t" @8 P. H; M0 ~! p( B
- ;--------------------------------------------------
: x3 Z1 L n' t, \. [ - MMC3_Chr_Bank_Data% E& H2 E M) r0 r2 [3 `0 q0 K
- .DB $00,$02,$04,$05,$06,$07
# [4 Q8 r/ b( f( \6 L* c
& j E/ k! v; R0 z& p' Z3 M9 a' _- ;==================================================
e$ k/ u4 q8 `8 ~( I) W - ;重置中断处理
3 s; o$ p. m2 R9 f# n# c - ResetProgram
3 k9 n, t& J) `" H' D. E2 y$ J - SEI- K; ^) k* n3 L# Y3 v
- CLD/ q' R; O$ n. K" z* p9 W
- LDA #$00
* N& u3 D2 k @/ \ - STA PPU_CTRL
2 C/ [0 h* P% z3 Z* B - STA PPU_MASK
' T) f, P2 @, p - STA PPU_STATUS
& Y1 v7 P3 \+ ]3 k - STA JOY2_FRAME
9 }- T' k" h- S - STA APU_STATUS
3 o% {# }; ?. k2 i" _4 n8 o/ v/ g9 u - & @1 K% y8 E5 e `$ R. l
- LDA #$C0
* V3 I5 G1 g. H: F% t' \ - STA JOY2_FRAME
0 Y8 t p5 t6 P9 y+ D7 N - ; i* G3 q* _$ x8 {/ H9 u+ h9 B& x
- ;等待vblank
9 D- |/ R* P: n+ J( ? - LDX #$027 g& l! t! Q/ R" T/ Q
- Vblank_Wait_1
+ ^% Q, X6 W9 C: o# z) J5 _% D- d - BIT PPU_STATUS3 J! v: k" K; U6 q4 M
- BPL Vblank_Wait_1. Z8 C9 Z& X# D2 E: _, _
- Vblank_Wait_2
" K' W+ U8 A, G+ [) O- { - BIT PPU_STATUS2 Z5 O& k4 q% d" J. _
- BMI Vblank_Wait_2
* M9 f& v. A+ [; W" r5 p( Q7 L: `9 h2 | - DEX
# A6 d5 o, s9 N6 E. U6 N - BNE Vblank_Wait_1, M r$ u9 M G8 _4 b
-
+ o* V4 I: q, P7 m6 @; E - LDX #$FF) j) a& E. w9 j% e7 N, V
- TXS
% U7 }0 L3 I) D- O% @& J - ' J, ~9 ?' w" i$ S8 Z
- ;初始化MMC34 k2 z7 l6 z, [6 S8 a
- JSR Init_MMC3$ k7 P A E/ ^# h& S0 s- I
- 1 N3 S1 [* r% J* B+ C7 L7 e
- ;==============================/ p7 C/ J F- t/ U
- ;RAM初始化7 G) f) S* U6 p4 s& t1 R
- Nes_Ram_Init
5 Q1 m- e* Z Q1 k3 K. `0 W - LDY #$00# C" S% G+ O) K s( s @6 } q
- LDX #$08( |4 w9 ^. ^3 g' H) ^5 r# d1 I
- LDA #$00) }" P) X; g& [4 Q, j+ }$ R
- STA <$00- [- @, X& O ~8 `
- STA <$01) i- k: ?: J+ ]* u
- Nes_Ram_Init_Write
/ v# t6 G9 K# G" { - STA [$00],Y
3 W4 p o$ K% P! [1 s2 c - INY
' J+ T; ~, T/ Z* w4 t: }; F - BNE Nes_Ram_Init_Write
8 z4 T* c9 T$ w) M; r0 m& v - INC <$01
' ~% i+ F0 Z* h6 }' H - DEX3 ?" f3 Y' x% z0 T5 b2 m
- BNE Nes_Ram_Init_Write( y! v& Z [. c7 n- z( F
- + T4 \2 X6 F3 H! k" [6 \
- ;初始化命名表
- E! Z- P! N" z5 m# [, } - JSR Init_Name_Table
: p+ y7 V% I' q# F6 z0 w- @) s -
; J. @ b6 \+ F8 [: C - ;初始化调色板
. b; u! _" u2 b( ^ - JSR Init_Palette
, \ w' U" {* O! M7 d -
4 _% a% H9 Q% l; a2 ?- M7 S - ;初始化命名表属性, o! n% |" ]* f1 n- q1 j" A
- JSR Init_NameTable_Attributes
0 J+ n! S ]+ m& G+ }2 E+ s( m - 2 ^" g5 M# I `
- ;初始化精灵内存( W, I7 C/ G8 @0 O' X7 T
- JSR Init_OAM_Ram4 l( Y w2 x! _
-
5 ]5 q4 |) v; t3 { - ;在屏幕上写点东西, @, A& O7 F0 O6 z0 l0 C
- JSR Init_Name_Table_Text
- T. L+ z4 V0 V& G$ A - / s' q+ V3 C$ u: ~: z
- JSR Time_For_Vblank
9 F8 g1 P- }8 w3 T0 s _& E" W9 e - ;开启PPU控制
: @0 T& O% b3 {. j- [8 Y( E, E - LDA #$A80 `7 t0 e4 d! x7 R# q/ a
- STA PPU_Ctrl_Buf
$ z5 \/ O4 d! t' E- D4 S, E' i - STA PPU_CTRL0 K$ n- Y$ Z, P
-
! F% }; d* h. n) {; t; h* n - ;开启PPU显示0 z, J8 Q1 r E7 q4 G/ T
- LDA #$1E
6 m: D: B- ~) P3 v8 H - STA PPU_Msak_Buf- v6 T) [0 s% A! S/ C% J8 A0 g7 B
-
2 M+ b' N9 A: \8 Q0 s% O0 t) F - CLI
, t# |6 j' Y, F7 @4 F0 ~+ w - JMP Loop: I% I6 }7 _2 {0 a
- ( D: {' R7 k1 y7 k
- ;==============================
4 V& e& v# E" C - ;死循环, 等待NMI中断- R6 e) E. |5 f7 b% S7 C @: b
- Loop! I$ A9 l" s! b7 ?
- JMP Loop
* P# X. u1 t" h; \+ r7 B
( [: }! H$ w: i w, k- ;==================================================0 {8 `: B0 [4 z M6 ?
- ;NMI中断处理
C" U3 o# a6 E - NmiProgram# d2 R* w7 S/ L, w; H
- PHA
2 `9 S$ u; v+ \7 R) }- A - TXA3 I& O% x0 Q+ f) P: t4 r3 l' w4 o
- PHA* J% _, g P1 @ o
- TYA0 Z' L/ K; |: @0 h ^: h
- PHA$ ~" m$ I |9 I: P/ P
- " L, I: w7 F: J, G' t
- BIT PPU_STATUS
4 ]/ c, X2 g* P" d( s- v -
# d- q. ?1 z( S9 r - ;关闭PPU控制9 B! e- a& {# s* g% j
- LDA #$00
! I: G! U0 A9 s; v - STA PPU_CTRL
' l! c, n. } _4 @0 O. j - 0 L' T9 k& }' V; e4 X6 |! o) g
- ;处理PPU
* U3 H9 G( }! m; Q' n - JSR PPU_Process
5 `" P: ?( o- P. I- R -
" \, G% B2 k: P8 a( ~2 ~) I+ o8 v; C - ;开启PPU控制& C3 D5 h* N9 X! s7 I3 P+ S
- LDA PPU_Ctrl_Buf
6 X& Z# w( v7 p - STA PPU_CTRL
' n. V; `1 }9 x -
8 s/ e/ Y! Q" T7 ] - ;手柄处理
( X# G1 W3 T* s {5 n# F6 o1 v - JSR GamepadProcess
, ` X3 L9 H1 ^0 ?8 }( m - 7 K. [; H5 B: u9 j
- LDA #$00* K* {# s: R- R5 Q% d6 S
- STA IRQ_Index2 w" t( J* c, }* h& k! c
- 0 k( J5 ]; @8 `1 M0 V
- ;启动IRQ中断, 第15条扫描线触发
) C2 v; W9 v. c7 K& | - LDA #15 + 1
) Q/ W9 T/ Z9 M0 C: D3 w, R1 d9 E/ { - STA MMC3_IRQ_LATCH
3 y6 r. u3 D& D! l# v - STA MMC3_IRQ_RELOAD' j7 i4 ?9 `" k1 C$ ]
- STA MMC3_IRQ_ENABLE+ s: b. X$ E. f% ?/ @9 ^. Y
- CLI8 P- T* N! x3 c
-
$ x, x# t- f' t V* C0 l - PLA
: u1 m% j. [* O6 n3 \6 E, Y3 H - TAY+ l9 x( n8 T- r* \
- PLA
' p4 z3 N# U {# T" C5 d - TAX$ n6 f1 N- z7 C/ V5 n7 _! k. j" |
- PLA
6 s% p4 s7 O/ o. a0 |+ T# r2 d! O - RTI* s& y6 V# g: F+ _& J _
3 T3 K' ]: `: I9 u+ I6 D8 a0 D- ;==================================================
7 H- R6 G( l- d6 o, m2 y$ @ - ;IRQ中断处理
( z/ z* d4 @3 K/ o& p2 ` - IrqProgram. H5 q R9 a" ^1 J( e& h
- PHA, S4 T# c$ p, ^* C) T6 I5 M
- TXA) K: ~/ Q% q5 e- v" I
- PHA M" i, [1 J# {* a9 c- n
- TYA/ x0 r. t: e' r! s% y
- PHA
# X5 h8 n. E5 j' O) ^ -
H( K" ?% G; k8 d4 j* E& y" S - ;关闭IRQ) p% ?, U0 }$ n& f+ \# K
- STA MMC3_IRQ_DISABLE
|* y5 |+ N6 w$ z! C -
2 Y$ }0 m# S& X. Q - ;允许下个IRQ触发' g6 x- t4 u' T7 c, e! \) m a/ W
- STA MMC3_IRQ_ENABLE
/ `& ?/ p7 x V0 d+ G -
7 q. j6 z, o% v- k8 C- `' | - ;IRQ处理, 15线后继续触发
' P, g3 n, ~( E1 d: ?! p1 w - LDA #15
+ @4 X: n5 o- ~' q! x, O - STA MMC3_IRQ_LATCH
! \9 D. t- ~& x& u0 Q - 7 u; o% W( ?- J' u. [
- LDA <IRQ_Index8 I4 r v/ Q N. m; x/ \* q
- BNE * + 4
7 ]) F* J% K7 V& V7 T7 H - INC <PPU_Scroll_H* P m4 y6 a" T. E# `! A
- * s& v% y* W! m, O
- ;设置屏幕滚动8 h( ] {& G# w {, g1 r
- LDA <IRQ_Index
4 G d: F8 }* X* x0 q/ o0 s5 r6 b8 ]0 @ - AND #$013 [# H g8 }( K4 |/ I( a6 C2 v
- BEQ Irq_Scroll_Right
: s. H; Z! J) W& r8 a( G' A - & p% l. L0 s* w# u }0 K' ~) z( N
- Irq_Scroll_Left( X% J, p M* g/ G' Z' Q
- BIT PPU_STATUS5 H* Z% t* p, l7 b$ c
- LDA <PPU_Scroll_H
1 O3 w8 w, P5 J% o# y8 N - STA PPU_SCROLL
. y& K$ }2 h2 e - STA PPU_SCROLL
0 A& F6 W4 R7 J3 J! [ - JMP Irq_Scroll_Over
' d' d& z0 p$ k. L( j - . S9 P* F6 F" ~& X
- Irq_Scroll_Right6 k* c9 ^ Q7 {+ \
- SEC- m3 p0 Q! m! H. ~ ^
- SBC <PPU_Scroll_H# T# E2 A1 o% |- D
- STA PPU_SCROLL6 p0 O J \) N3 F
- STA PPU_SCROLL
. s% b U" I+ }1 M - Irq_Scroll_Over: g4 a' E3 Q5 h" x4 J) r
-
% ?0 y! Q$ G# z1 {* O - INC <IRQ_Index H) _2 Z* j9 d$ k3 n! J+ D
-
' @5 u. w3 T. c* o/ f' l& R - LDA <IRQ_Index
) H* V( W3 a& m- R I& V - CMP #14- f* U2 H" L3 P* x3 p( V. C
- BCC * + 5) Z# d" e- l$ E0 j: w& s: t
- ;关闭IRQ
4 ~& f* A2 l0 O/ q* g4 ? - STA MMC3_IRQ_DISABLE
# K" m: `7 B6 \# a2 `) m - / o) ^8 h1 Q* }( h" f. {
- IrqProgramEnd/ F& l* i, {# `* v$ E2 b+ D5 f% W
- PLA9 q' V, W6 g, t- f0 j, a: z
- TAY7 T4 M" ?$ _' B1 g2 `/ [
- PLA* U2 V% _4 }; Y& V5 Q( \
- TAX) _7 n5 P! {* a) P, @
- PLA
1 |- D4 R/ Z2 {- q$ m* B2 d - RTI7 K0 ?7 v0 V; U2 e2 t5 A4 h$ M7 i/ j% a
-
; y' s4 H) g5 }* K* f" { - ;==================================================) j$ l4 W$ s, T9 a k" X( E
- ;中断表
0 P9 H# e& E5 v0 @6 B - .ORG $FFFA# V9 ~+ r5 W8 a/ b8 a$ {
- .WORD NmiProgram" ]. Z. H# ]5 i. c; f% a* a3 [9 H
- .WORD ResetProgram7 W/ c% Y, b2 [
- .WORD IrqProgram
复制代码 [/code]0 m: W' H4 g' _$ G- a* t* Q
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