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- [code];[FC音乐][MMC3 IRQ]
8 B5 K) C% w9 D - ;FlameCyclone 202307102 E B0 F; n2 H9 Q0 y- b- b
+ D8 Z+ Z& F" t! i- ;文件头
8 ?1 j; J ]6 q7 O: q4 P8 O) P/ m0 g - ;======================================================================
0 A& R. U7 D6 l# p! [7 d& k4 W - .INESPRG 4 ;16KB PRG 数量) }3 U1 q4 c: d, w7 D' O+ s
- .INESCHR 1 ;8KB CHR 数量
5 l8 d% b8 m" f( k, O1 v - .INESMAP 4 ;mapper 4; u' K5 M+ q5 i s7 x
- .INESMIR 1 ;命名表镜像 0水平 1垂直 `; u- d% u7 q5 X' C
" X) t a& C; `+ x- ;必要条件
7 @+ p& A5 R, ^ z - ;1.持有CHR ROM9 T$ H0 r* O2 z+ {6 ~5 o3 S
- ;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
9 y+ p( ^1 `" U - ;3.精灵内存(OAM)不为空
1 }+ i5 G' W, X( M, k- u
4 Y! \: }' [' f) z+ T8 \- ;==================================================& s9 z2 H5 G6 C6 ^% D
- ;NES端口常量, b. G! K- X0 I# n- S/ G
- PPU_CTRL = $2000 ;PPU控制寄存器
& e- p$ R/ h4 ~1 s9 U( w, @* J8 ` - PPU_MASK = $2001 ;PPU掩码寄存器2 T* U5 x. J' _3 T; w* r
- PPU_STATUS = $2002 ;PPU状态寄存器:读取后PPU_SCROLL和PPU_ADDRESS被复位,下一个写到PPU_SCROLL的数据是水平的,写到PPU_ADDRESS的数据是高位4 |+ \! O7 q- | o$ e% P5 I
- PPU_OAM_ADDR = $2003 ;精灵RAM地址:用来设置通过PPU_OAM_DATA访问的256字节精灵RAM地址。每次访问PPU_OAM_DATA后该地址增加1
" k V- |$ S1 U6 V0 O+ P - PPU_OAM_DATA = $2004 ;精灵RAM数据:用来读/写精灵内存。地址通过PPU_OAM_ADDR来设置,每次访问后地址增加1) k( E" u; U" r$ p9 b
- PPU_SCROLL = $2005 ;屏幕滚动偏移:第一个写的值会进入垂直滚动寄存器(若>239,被忽略)。第二个值出现在水平滚动寄存器
7 q4 ~* [1 l! \; K$ { - 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" s+ U P! S- o
- 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 k3 g; \% I; d+ D& x a0 j
- 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
5 O. d% K' N& ]* @4 X - APU_STATUS = $4015 ;声音通道切换
2 S" P H1 e* j/ S( ]0 r, y. A - JOY1_FRAME = $4016 ;手柄1 + 选通
' L' e+ d; A: ?) G9 J6 E) o3 u: ] - JOY2_FRAME = $4017 ;手柄2 + 选通
: M2 L9 `/ @8 n5 m5 L - 9 A: \1 H; _5 A: l4 ^
- ;==================================================
% R9 ]8 I1 ?2 ` - ;MMC3端口常量" B) G/ p( [; [- J0 a
- MMC3_BANK_CTRL = $80005 g9 y$ { k% }
- MMC3_BANK_DATA = $8001" g- ?6 I7 u3 h0 o0 l
- MMC3_MIRRORING = $A000, {/ P. B1 @# ?! A, E8 o0 ?
- MMC3_PRG_RAM_PROTECT = $A001) ?5 E! l2 \$ c
- MMC3_IRQ_LATCH = $C000( M9 i4 q5 f) w" r/ z& o
- MMC3_IRQ_RELOAD = $C001$ I* B! f6 f' s% G! s1 E$ S9 _
- MMC3_IRQ_DISABLE = $E000" r" }, o* [5 [" Y- a! e
- MMC3_IRQ_ENABLE = $E001/ O. P5 U/ S" K% s
- : K- l1 h! H! B6 o; J( [ ?' p/ ~7 i
- ;==================================================1 v$ ? _6 P1 I2 y
- ;程序块配置$ u" P0 B% S; L1 ~( j7 s
- BANK_DATA_MASK = $071 V5 Y; p$ o9 U. R7 u% n) |
- ;--------------------------------------------------" ?) W- d& o: P o1 b
- RESET_BANK = $07. N, Y: \* S5 ?0 H/ o/ T( }- I
- RESET_ADDR = $FC003 U" x @8 w5 S1 B1 a
- 5 J/ i5 A6 U6 l. h9 Y. ]% K3 g. q
- ;==================================================
7 K0 W+ F$ Y- X - ;图像块配置
& A' ^6 E d: l - CHR_DATA_BANK = $08/ {" @ l4 ^* w
- * d* \. A! j! H- v5 v2 @
- ;==================================================9 j: z0 {4 w0 d
- ;零页内存地址配置
% c) r2 p( d2 g* J* J- ?* w - Use_Ram_Addr = $80
7 @5 x; k7 G( l5 H - PPU_Ctrl_Buf = Use_Ram_Addr+ r- G6 `2 o& U( X$ f. o5 R7 ^
- PPU_Msak_Buf = PPU_Ctrl_Buf + $01$ j8 J6 D% b# F4 m( g! }
- PPU_Scroll_H = PPU_Msak_Buf + $01, M' Y9 p* Y% X1 T
- PPU_Scroll_V = PPU_Scroll_H + $01
+ }8 B) a' O7 Y" w6 B - FC_Data_L = PPU_Scroll_V + $01
* _% v6 T P: T& q/ k4 L( Y6 J" a - FC_Data_H = FC_Data_L + $01# T" x1 N. @* W( W/ s8 e8 R
- FC_Data_Buf = FC_Data_H + $01& F1 w# \1 e3 [' f
- ;==================================================9 Z N7 p. m0 {' v
- ) U+ ]' P* [) D p
- GAMEPAD_MERGE_FLAG = $04
- M' U- x* P' g5 r1 Q: y8 O2 J. S7 ? - 1 C0 e# w1 t [' W0 D
- Gamepad_Keep = FC_Data_Buf + 1& h" p* @8 l) I7 w( Z1 N
- Gamepad_Once = Gamepad_Keep + 2% L' b4 U# T J+ A% K$ J! T: a( h
- Gamepad_Temp = Gamepad_Once + 2
3 Q+ J4 W' c( _" E+ B! h; y - 7 U! T. @$ z' k3 d; Y
- Gamepad_0_State = Gamepad_Temp + 2
8 x$ s* [1 f; {7 N q7 U - Gamepad_1_State = Gamepad_0_State + 1) G6 K0 R# R& x- r7 @6 L( U
- Gamepad_0_Value = Gamepad_1_State + 1
0 l; U( [; ~% p4 D) M - Gamepad_1_Value = Gamepad_0_Value + 1
: O+ c% H( p4 N7 k! t/ I R - Gamepad_Port_Value = Gamepad_1_Value + 1
- g3 z* a, e2 X+ {; y7 b - Gamepad_Merge = Gamepad_Port_Value + 1
$ N1 r4 K2 ^$ { - 9 V8 `) c! a5 I, w9 [$ G9 p; L
- ;==================================================
# ?9 L5 E/ N( z% K" a' M - IRQ_Index = Gamepad_Merge + $016 g/ y0 c+ i- Z0 j
- ;==================================================+ P7 w+ Y" r% o5 [
- / z; B4 i( [0 ?3 o K, A- ^
- ;CHR图形数据6 O: k0 r( G9 h8 F3 I1 I2 q
- ;==================================================
% l. @' D9 M9 x& d' d - .BANK CHR_DATA_BANK0 U) {' @8 Q) j7 v0 }
- .INCBIN "chr_bank/chr_data.chr"1 z5 E* O t& i
- 4 }$ `/ [% X/ Z: l, b& U& }
- .BANK RESET_BANK & BANK_DATA_MASK% U2 U& ]8 g/ f! F" [
- .ORG RESET_ADDR
# `( k4 R: `8 h( L& x3 ~ -
; Q6 U+ V( s- u9 p - ;--------------------------------------------------5 O4 z5 Q+ x* ?: O
- Attributes_Data
! y# @" X% q @7 a+ W - ;命名表属性( z& P8 K8 e" R
- .DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
+ q( K: V& ]' I9 T8 o - .DB $50,$50,$50,$50,$50,$50,$50,$50,$FF,$FF,$FF,$FF,$BB,$AA,$AA,$AA7 u/ i9 ~0 w ~/ T3 t, ?
- .DB $0F,$0F,$0F,$0F,$0B,$0A,$0A,$0A,$AA,$AA,$AA,$AA,$AA,$AA,$AA,$AA
* Y* Q: H1 [- i' j# S9 y - .DB $AA,$AA,$AA,$AA,$AA,$AA,$AA,$55,$55,$55,$55,$55,$55,$55,$55,$55& K; t8 b. m. Y9 ^5 f+ d
- ;--------------------------------------------------0 J1 q3 x F: A, \. s# ~
- ;调色板数据
- a, R ]+ k( }( K5 E: f - Palette_Data
4 z& r" c ?4 F0 N" B- q" S7 K - .DB $0F,$27,$20,$0F,$0F,$24,$20,$0F,$0F,$21,$20,$0F,$0F,$25,$20,$0F
# k+ f. ~; O* j! p: M5 }. g2 G% Y - .DB $0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F* ~2 B9 g2 s J: S, s. Z
k8 e. a3 H6 ?8 m6 n- ;==================================================: U, H, k& n; n4 I0 M- ~$ s
- ;命名表初始化' X% i, v ]% G9 z/ e h% H) X F
- Init_Name_Table5 D* B% x, F$ q$ X2 S
- LDA #$20
6 v& I) t, L' S( \( b3 a! v - STA PPU_ADDRESS+ \0 @+ v4 g' e) t
- LDA #$00
) x1 e5 K! J) @2 y - STA PPU_ADDRESS
' [; f. X% U* `. t$ n5 a - LDA #$00
5 t1 S& s' t8 T% ^: H - LDY #$00
7 N% ^! d' h+ ]0 g& P - LDX #$10
]$ N/ U( z5 J( S2 f0 C- H - Init_Name_Table_Write# \0 o! ~& s- t8 T0 |3 ~% a( T
- STA PPU_DATA
6 K: p0 J4 b: R" R) R1 i: R - INY, f) d+ l, l5 F
- BNE Init_Name_Table_Write
W5 e: r3 F2 V* U8 k) [4 X: ]8 q6 x - DEX
' z8 Y1 g5 \4 l7 b0 S- d! K& n( I - BNE Init_Name_Table_Write0 j) A5 C; L6 F S
- RTS. Q/ w0 A* A7 |$ ~
- ; i+ x" T0 }- z8 K+ h
- ;==================================================, Z. s) h& j7 U
- ;调色板初始化
& P/ h9 r' d/ n1 N7 Y1 M - Init_Palette$ l' i q! m9 ?
- BIT PPU_STATUS3 K2 L) Z. d. _, c. c4 \& A& M
- LDA #$3F$ H$ C3 Z) A% P% M
- STA PPU_ADDRESS$ ?9 A0 y x% j3 u
- LDA #$004 k9 b8 ^7 l" z- x; t4 }: A! d
- STA PPU_ADDRESS) ^- n. e: F g7 [! T/ m4 ~
- LDX #$005 L g. l* n6 U) Y, ?0 p- @& d
- Init_Palette_Write+ S$ p3 [! v: j7 R5 W1 M5 C7 L# |
- LDA Palette_Data,X8 m$ m+ J. a! R! T: H
- STA PPU_DATA
* Q# p: r" Z0 n7 {( r- {2 J/ l8 g - INX
9 ~, S! b3 N1 }2 H4 x - CPX #$207 Q8 c6 j# D ]/ J' N- b
- BCC Init_Palette_Write
% l$ ^ R) H. S# D0 f6 f - RTS; ~; e) a. [4 \
-
9 \5 t' p' u0 @ - ;==================================================; E& p- ^; W) ]- d/ T( k8 v( D
- ;设置命名表属性
; u: [3 v) D, y. O - Init_NameTable_Attributes
j7 P8 L+ _2 ?$ I - BIT PPU_STATUS9 Y7 p3 Y3 M6 {, A2 Q
- LDA #$23
* Q: V( g7 ~& J - STA PPU_ADDRESS) Z" a$ `' e9 q& n# ~$ D$ X3 I
- LDA #$C0( T% L- i# a! v% U
- STA PPU_ADDRESS
& h5 F4 C4 |2 T - LDX #$00# }/ e/ N' v& u% n! V3 V
- Init_NameTable_Attributes_Write# b' D! Z4 |. q9 j
- LDA Attributes_Data,X
5 u1 ]. @0 u( I# i/ ] H9 z& ^6 g - STA PPU_DATA$ J% \! ~8 D* Q- Z# T4 u* j/ G4 ?
- INX
0 q0 o" d3 {9 ?, z9 z7 X - CPX #$40
" P, w; ]& W; g - BCC Init_NameTable_Attributes_Write9 u8 `- n+ }/ D4 h
- RTS
' O/ V5 z A7 k7 V& m' x- \# \% G
7 ]' r* l7 [- C0 f. Y- ;==================================================
$ R( r" z. d4 d' z+ {( {- b; Z - ;初始化命名表文本
( v: S& v: H5 k" a0 r0 R/ Y - Init_Name_Table_Text
$ {. {' ]5 e4 \+ ^ - BIT PPU_STATUS5 A& u, A' @$ \, |& Z5 [+ Z- R
- LDA #$20+ i8 m/ V3 w% ^* s
- STA PPU_ADDRESS
5 B0 Y3 c( ^- ~- c8 } - LDA #$00
# R4 C3 u' s/ k8 @6 L/ w: M - STA PPU_ADDRESS8 n, P7 j5 C6 R9 z
- LDA #$00
2 B+ V9 |5 N: b2 ^ - STA FC_Data_Buf
' `; D# y L5 x1 d% b% K( @) ]3 T - LDY #30
5 X9 f% ]( S; m1 A. _& l3 s& f - Init_Name_Table_Text_Write V' A8 w8 k! N3 C: b
- LDX #32
3 s2 P, z2 V1 q6 S4 J7 P - Init_Name_Table_Text_Write_Char
6 O1 l, h. }, x - LDA #'0'9 ^( s- S% m( T( y0 v
- CLC
8 q& u8 O- `' i U- [ - ADC FC_Data_Buf- w9 h; h0 K& j* s5 x+ e
- STA PPU_DATA
6 j* e/ h. b( e. M7 Q$ _2 A: C - DEX2 m5 c# e' y, H r$ a
- LDA #$143 v5 }/ m3 Q+ z$ z. J
- STA PPU_DATA: v9 e% t# e. @, J9 ]8 j% e6 t- Z
- DEX
5 G% M: ] I' o( s - BNE Init_Name_Table_Text_Write_Char+ Q N$ p; i+ N( V) E# M+ T4 B
- INC FC_Data_Buf
- v/ @" Q2 @+ `- z2 X# y: [ - DEY9 _' X- n4 Z1 |( }" k
- BNE Init_Name_Table_Text_Write
& ]8 [& S8 f1 N- u: } - RTS
, b$ J& C! P) C/ E# h
" c- j: n, ^: E4 r p3 ~! V5 U/ t- ;==============================( c9 v/ i7 y2 C9 m1 |3 a/ j4 m# Y& d
- Init_OAM_Ram;初始化精灵内存/ ~5 i1 O/ f$ }; \) ~, X
- LDX #$00% [8 k0 v: ^! i. F+ }- c
- LDA #$00! h0 ~% V& @6 ?8 J% k
- STA PPU_OAM_ADDR7 X9 d3 O1 j S3 T' n/ H8 l5 b; O# {
- LDA #$F89 ~& m% q" T( `& B
- Init_OAM_Ram_Write
1 I( W% [$ p% I a* b - STA PPU_OAM_DATA$ M. J8 f" V* \# F6 C
- INX4 `7 y; ^' `8 K* e' h, Y
- BNE Init_OAM_Ram_Write5 C$ g" W, F( D+ s- A% r
- RTS' @$ D! f$ ]) C6 Q2 O) A) q$ g% I
-
, Z" G/ ]6 }: }1 I' C N5 P% n - GamepadProcess;手柄处理
8 c* w1 Q6 L: Q' V- Z7 r - JSR GamepadDatacan
$ f) C: V p c. M4 O - LDA <Gamepad_0_Value' K7 @# S& \5 E8 p, g. M
- STA <Gamepad_0_State. l# m' H& U! G0 P1 m$ q
- LDA <Gamepad_1_Value
- `# D$ @. I; D% l3 N - STA <Gamepad_1_State/ S" D. l. S; s0 J! A( B
- JSR GamepadDatacan1 _0 a3 Z- ] f+ k! `1 l3 C
- LDX #$01
/ F8 m" m! B8 e# q6 R$ L, l% W8 @ - GamepadMergeCheck;合并手柄输入检查2 N$ u; E6 H1 t
- LDA <Gamepad_0_Value,X
" }9 K6 V5 D& y N - CMP <Gamepad_0_State,X
2 \* C5 T9 q4 g7 m# _1 w/ k - BEQ GamepadMergeInput+ T7 E2 X. f3 H) e/ ?
- LDA <Gamepad_Temp,X! ]1 r! `5 ] C- |$ {+ m
- STA <Gamepad_0_Value,X
$ ` e2 {' c8 {1 @ - GamepadMergeInput;合并手柄输入9 x1 C; v* K# ?) S) e: k! e! z
- DEX
; g3 ?# I& ?/ _0 \ - BPL GamepadMergeCheck
$ r" _/ f' Z% M2 U: l8 ] - LDA <Gamepad_Merge
2 J4 |& ?$ c: L. l8 I8 q4 R+ ` - AND #GAMEPAD_MERGE_FLAG
* L# G1 x5 ?4 r6 r5 V; \8 f& n - BNE GamepadStateProcess8 x& w# D/ |: j2 M
- LDA <Gamepad_0_Value
+ L5 v& L' ~ Y% K: M - ORA <Gamepad_1_Value
1 Y$ S C5 Y; h t K - STA <Gamepad_0_Value
/ a+ h" ^! y, L% [- G( |! L - GamepadStateProcess;手柄状态处理6 R% Z" }4 g0 `5 X( u; m& W
- LDX #$01
7 b: d' t* o) t9 T6 z7 J0 C - GamepadStateSave;手柄状态保存, `/ }, F. T. X2 @
- LDA <Gamepad_0_Value,X- J( r# e1 j/ G, E
- TAY
, Q J3 J4 U' _$ n. q4 W - EOR <Gamepad_Temp,X! `! C! d/ M1 m0 ~" Y
- AND <Gamepad_0_Value,X
7 w* A, l% ^# W1 y0 X- ? - STA <Gamepad_Once,X- R8 T$ t/ N9 t9 B1 \' G; M4 ?
- STY <Gamepad_Keep,X5 _8 z& S+ ~3 a% ^$ t: ^
- STY <Gamepad_Temp,X
! X6 F9 o3 q& z# [' ^' e- U+ o - DEX+ f5 L# o. r( }4 d3 P9 f) T/ U
- BPL GamepadStateSave
; x+ |$ |3 _$ I I! m" ] - RTS
3 j4 q" h7 H5 [, C. w
% ?+ G' E- N5 A4 P# w; N0 |8 `( }6 l3 w- GamepadDatacan;手柄数据扫描
- s( t) X' Z7 N+ U6 n# ^) r9 L - LDX #$01; W8 s( ]+ } d( ?2 l; }1 h' z/ r* x
- STX $4016- `1 l" ^ u* n' U% P) S
- DEX
. |6 o! v/ g/ b$ d - STX $40162 L# z2 h( b* ?! Q- N* x
- LDY #$08
$ G8 Q- C( L. E/ [; |& l - GamepadPortScan;手柄端口扫描
$ P, d6 a" F) N* ^% h2 ?3 s - LDA $40169 X0 g2 z9 u. \$ M( i- }9 U; L' C3 Z
- STA <Gamepad_Port_Value
0 p2 u' |* H2 U; Q# X - LSR A
E$ Q4 b. @2 K' w% Q - ORA <Gamepad_Port_Value
; Q2 Y/ ]/ A9 v+ H - LSR A% o* \% f; R. g$ \ u5 X
- ROL <Gamepad_0_Value+ T& _) y. Q$ h# u$ \/ ]6 M
- LDA $4017' [. V& S* V4 e7 J
- STA <Gamepad_Port_Value% S/ y+ Y; y+ g9 ?
- LSR A
+ G0 N3 Y' \& x" |7 w2 ~* a: C - ORA <Gamepad_Port_Value
$ L% K4 e& { l; N - LSR A
' `# S y/ ~+ T - ROL <Gamepad_1_Value! W! J1 ^/ O+ B: Y' P v
- DEY5 l# `. ]+ d: d" s" P0 Y
- BNE GamepadPortScan
7 L' Y6 R$ X; y I8 n - RTS$ s0 {7 y% D& u7 a
- @- f% {6 X0 O! z2 B
- ;==================================================) j V% N# G$ n4 U# T9 R
- ;PPU处理# P) G( K4 ~% D5 T
- PPU_Process; U3 L4 `9 `$ K8 \! q
- LDA #$00
# M4 O* R- Z' r+ I. G4 A - STA PPU_MASK; y- c4 K6 k: Z* y& d5 }
- ; e0 E: X8 \+ @/ E! D( u
- BIT PPU_STATUS' h; X- G6 m9 f$ h R
- LDA #$20
7 v. }. E0 O' L; L( q - STA PPU_ADDRESS
, r# k2 w5 i. n8 A% [ - LDA #$00
5 ^$ H. D" j! i8 W5 f8 a - STA PPU_ADDRESS
) [( J# u2 w' g/ F* Q7 ^" p- u -
7 F# i) G7 O0 P1 G1 Z( r" \ - STA PPU_SCROLL3 w# \$ J) s& F$ P) e$ v
- STA PPU_SCROLL# s! Z4 Y& F# N8 V- x: w7 D: n
- 4 x8 D' R' I3 [/ i, w- t1 u
- LDA PPU_Msak_Buf9 t& d! U/ o' N8 J, H
- STA PPU_MASK
/ `& a4 o0 J$ L! d
9 ]3 y7 y2 V5 B, d- RTS2 P( ]# e6 l6 Z2 a% n) R
- ! B7 K3 R. w4 n ~7 y: {4 P, F3 i
- ;==============================- L# V% z+ y4 J- }
- Time_For_Vblank;延时等待
; Z; ~ H8 e+ R! B6 D - LDA PPU_STATUS
8 P9 Q! C& ?, z) b' C, Y - BPL Time_For_Vblank
5 S$ K9 K8 N, M- n4 ^ - RTS
" |' o1 Y' j% v -
: V0 B0 `" n, _# i1 w - ;==================================================
B' k2 [6 M7 o& b2 ^. \ - ;初始化MMC3
" I1 k. i" M; p - Init_MMC36 R6 s3 t. X2 B
- STA MMC3_IRQ_DISABLE
* ~& ?2 `( n2 N - 7 X, C% g/ Q' K7 X
- ;设置MMC3水平镜像
" B' N" F8 J" n0 U$ D - LDA #$01
2 e/ K& [6 }9 t9 z0 y1 c8 \3 ?( d9 s% X - STA MMC3_MIRRORING' s( f) F4 {6 I3 @6 S9 N
-
: ^) C1 e- U/ O9 Z- e7 g - LDX #$05' E' o! R4 C; d$ |# @
- Init_MMC3_Chr_Bank_Write
+ s$ L8 N( h6 j; z. C9 f9 A/ [ - STX MMC3_BANK_CTRL
: S5 O8 c9 v3 ~" @4 {0 S' V( C - LDA MMC3_Chr_Bank_Data,X3 w" B8 ?& R+ x& j. y# t" C1 W5 _
- STA MMC3_BANK_DATA- A8 R0 Q: q7 S" o& F0 C
- DEX0 ]0 ~% q% s( f, f
- BPL Init_MMC3_Chr_Bank_Write
, d( a" v$ R9 M2 c - RTS
4 ^" W+ U+ H" q* c& L+ h9 w - ;--------------------------------------------------; S/ h5 P1 U7 P0 P9 F
- MMC3_Chr_Bank_Data: q j" f9 e7 Q% z% g. j) c0 f/ r
- .DB $00,$02,$04,$05,$06,$07
# x6 `% ^% y) [+ z& p - 8 F u, g1 m! E5 F9 z2 }
- ;==================================================$ k9 X8 |1 H/ g [
- ;重置中断处理: r) Y- a" M' |8 U8 f
- ResetProgram
1 Z, m7 h5 C. g+ h' p" N& F - SEI0 L" F, a2 J: a
- CLD
! ^8 z3 U3 g* w, v6 `. I. \5 a - LDA #$00
2 @9 ?, R* F& t2 d) w+ V% b - STA PPU_CTRL8 W- D3 |/ K' {4 B- w" Z' g2 [
- STA PPU_MASK
$ m E* m! a _ a8 e" X' j4 E - STA PPU_STATUS
' S; v8 O- p) I( L1 O8 U4 C+ o - STA JOY2_FRAME
/ Y7 C, ], m) o1 N9 ~ - STA APU_STATUS7 d3 o, g- U, R1 X% v, Y
-
+ P: q+ A5 a$ S d - LDA #$C0
# h/ v8 O% Q/ M2 U - STA JOY2_FRAME8 F" u" M7 [1 \* r7 u2 V! Z
- 6 K, |+ {! O& M+ B* f$ W
- ;等待vblank
) D- q8 g+ J4 P2 U. l - LDX #$02& ^: i+ ^0 [2 i5 T7 v- P7 f7 o
- Vblank_Wait_13 E% \& H% u8 M& h6 W/ K7 {. w
- BIT PPU_STATUS2 Y2 {7 h* V& @& |) l
- BPL Vblank_Wait_16 X9 Q, P, W7 l; {/ z4 D
- Vblank_Wait_23 ^; J& @6 Y- c' I) F3 s; } \
- BIT PPU_STATUS
5 T3 y9 x# U8 D6 x - BMI Vblank_Wait_26 @" v" J/ N1 U5 _# ~3 ]
- DEX
) |- f7 r3 P) N - BNE Vblank_Wait_1 L5 s& R2 T* F
- 8 k( m4 v3 J. o* e" @. C
- LDX #$FF6 F) d/ V9 `# U* t
- TXS% Y3 R3 f4 A. y5 p. t) f+ C; Y
- + R+ i& u; f# I( `1 w
- ;初始化MMC3# F1 z& v" I- I' x9 r- r
- JSR Init_MMC3
; W9 ]; X) y2 S% z0 Z! r - : u( p" }: w5 G/ O. i
- ;==============================$ v a! e- p/ |: ^+ F
- ;RAM初始化
# r2 A' H& f+ A$ m, O9 }) a - Nes_Ram_Init5 J2 Z2 j: G0 d% v- H
- LDY #$002 c& D, E/ Z6 N' M' \0 m
- LDX #$08
9 E# h$ F0 B( D! y; v: j - LDA #$00$ d' D1 V6 n" l) n& u4 Q1 a& i. v( N t
- STA <$00
8 [) O+ E s9 d; @0 h( e- @( w - STA <$01( B+ W1 ~( F) D5 F
- Nes_Ram_Init_Write) x& k8 Z4 ~$ ?! a5 O3 y; a5 y
- STA [$00],Y
q1 ~5 e8 U5 O - INY
' U: k% i8 l$ N2 h. m - BNE Nes_Ram_Init_Write, U, P4 m; Z- y2 O4 U* r
- INC <$013 ?; X4 A: g) e3 [1 e) S4 o
- DEX
1 `% v9 ?. v" W' c - BNE Nes_Ram_Init_Write
' q$ s* V) o% M, b/ \ -
' i; m9 W. l" R' E6 m5 c( U - ;初始化命名表/ s* \9 q: M. f
- JSR Init_Name_Table
8 x5 _2 w# o- m$ U# p3 D -
& E/ |; j7 ~' k0 R5 T - ;初始化调色板4 k* z' n$ N# T8 Z( [
- JSR Init_Palette
2 L8 N! K9 h9 ?( i -
* H: `2 u1 c1 |# D - ;初始化命名表属性; V% Y5 {7 |4 A; M# H4 P/ O
- JSR Init_NameTable_Attributes
6 r0 {2 C5 ?, [8 C% Z' M+ n - * ^7 m4 C) ]2 Q- k$ s$ z+ P
- ;初始化精灵内存
% c. A- d! H; z x0 P; }6 z" L/ j - JSR Init_OAM_Ram
% V V) o" @ p - # O. p9 ~& ^' J( | c
- ;在屏幕上写点东西$ I3 x/ K6 ^6 m' k) @1 K) f
- JSR Init_Name_Table_Text
% D3 G4 q2 R) v! s - / v6 @9 {6 X( m) x0 u, j3 D+ {
- JSR Time_For_Vblank
4 Q9 Y8 b9 G# w6 C. `6 k2 Z. R1 J; p - ;开启PPU控制0 _- u$ h( f4 R
- LDA #$A8
3 r0 g, N( Z* i - STA PPU_Ctrl_Buf8 |+ L1 S7 k+ {
- STA PPU_CTRL
0 Q) O4 {9 P% A& Z - ! z! J$ F" }! F: J7 N
- ;开启PPU显示+ P1 F# o( B4 C& ~/ o
- LDA #$1E
: V; v/ M: ]9 o3 k8 a: v' V - STA PPU_Msak_Buf
* I B" E) t# ~. A( ` -
3 l' K: u1 T. E' T+ W% d6 v- k8 O - CLI
3 P6 @* |8 F) n' p! @( o# [! { - JMP Loop) I5 n$ q+ P; F5 X, p1 [ s7 h
- . l. N1 X9 B3 Z' @
- ;==============================
1 K) m2 I5 I( f/ [: I# e. @+ k( t - ;死循环, 等待NMI中断
$ [3 O# w& [! y$ L0 C4 v9 c, T a - Loop& K$ B5 [8 O5 t5 @/ p" }
- JMP Loop
6 G; C0 \: I E- A0 ^, z/ w
k4 M) }9 G. l3 n7 a M+ Z c- ;==================================================( k& Q7 p! c2 X1 ~! H
- ;NMI中断处理* m% t7 q7 c3 C4 X7 [8 s! x
- NmiProgram
% M: I6 t0 L5 t. d - PHA% ^* w5 _; ?+ l: C3 x, b; e' f9 K
- TXA: J, `, w* F# J! F1 S
- PHA
1 M- U2 W& R' @& y - TYA& p+ k3 Z: g0 F4 ~0 X$ {1 H
- PHA
/ ^! O$ n1 G7 T2 X! H; k/ k -
7 [' ~2 m4 U; l3 y" x; A7 T - BIT PPU_STATUS
: P2 ?' A; P8 l1 Z" t# m. D: x8 }/ L, B - " B9 o- u2 x6 F9 H
- ;关闭PPU控制
4 `4 S" a9 z- | - LDA #$001 {' c$ l# M" P
- STA PPU_CTRL6 F7 O" x+ \5 x" |! F6 k+ O
- ( N6 p: |/ ^$ D# B' i: a
- ;处理PPU
/ ~" g& s4 \/ _& h2 g# D - JSR PPU_Process" O) i7 {8 e5 H- z
- 1 O1 o, [" S7 J, j+ w1 E
- ;开启PPU控制, T: ]% b) {- Y2 `
- LDA PPU_Ctrl_Buf
4 O' `& ^0 o' C0 [ - STA PPU_CTRL6 o+ f$ a# ^/ g' g1 A
- ' K# f |7 x3 I5 h2 K1 K6 z: z
- ;手柄处理3 J, Y' V7 A* Q* H; T
- JSR GamepadProcess4 h% M$ S3 F3 Y" l, ]/ W
- 8 v" f5 R+ u4 B' g
- LDA #$006 p: G0 {* _) c( g
- STA IRQ_Index% Z. ?0 A3 Z# d9 B' t# q0 J+ C
-
/ n a( r0 A' H1 R; A1 h2 T - ;启动IRQ中断, 第15条扫描线触发2 b: v( x- @" X/ Z& U3 H' P
- LDA #15 + 1
4 e$ G. ]) Z1 N - STA MMC3_IRQ_LATCH
! S3 T% U( q. e- {2 t - STA MMC3_IRQ_RELOAD
( P1 b Q; N+ u! z - STA MMC3_IRQ_ENABLE3 u! K# a8 T2 h! W" {" ]
- CLI
, i# v, o! J" Y+ |) ~# { - 2 O/ v, M7 G' ]" O
- PLA
o, {3 `! s6 Z+ E) C4 s - TAY. s' l! N# C4 d0 n) e) q0 F8 J
- PLA! h7 j( L7 K# i6 a
- TAX
1 o/ M- l. b0 S. g a7 a/ r - PLA; W9 y& }" I" Z
- RTI
& P. K z: s- @, D
( s" M. D, ?$ M A* G. B- ;==================================================
/ m, t$ o# G" u - ;IRQ中断处理5 e9 x& `/ C. }8 b8 R
- IrqProgram
# ~2 n/ M% S. I - PHA$ ~' h3 n& @5 e7 [8 t1 `
- TXA" k% c4 s) x8 r! ~
- PHA
# X7 Z: _8 @. E( B5 a; k3 N - TYA
8 d) Q: C' G6 l - PHA3 w+ A, E' {* ]) [, d. `
- R0 E# Y% K. U
- ;关闭IRQ- g: I+ R* I- n# s2 C
- STA MMC3_IRQ_DISABLE. r/ ?/ J% |) u9 C2 E! X3 [" e. c2 W
- C6 u5 @4 E5 E6 A: t$ h
- ;允许下个IRQ触发
7 \2 m7 T( ^) J: W& V - STA MMC3_IRQ_ENABLE
. T3 R2 [" |, G -
* k- P' }$ J8 T; Y g4 \ - ;IRQ处理, 15线后继续触发
$ V1 z4 D' r8 v( v - LDA #15
% O( P' B$ ?3 F o, q9 y- f - STA MMC3_IRQ_LATCH: [( Y2 S/ ^! U. m1 ]& i3 \. d) k
- $ R( o! s; s+ ^! r- ^
- LDA <IRQ_Index' J% O; {0 F2 V, M1 f# P- }
- BNE * + 4# z1 @( H. s6 D/ \
- INC <PPU_Scroll_H
5 K% R4 z4 P7 j2 H - I8 x: P# Q: T
- ;设置屏幕滚动
9 ~7 Y8 `7 m7 ]4 B* @ - LDA <IRQ_Index3 o- ^4 u$ o. N7 W, F- w
- AND #$01
3 D8 b! S! _/ \ { w - BEQ Irq_Scroll_Right; ]1 \9 F4 _9 A+ \' p$ L3 j% [
( [& v; W+ G. K/ x- Irq_Scroll_Left/ \3 l4 G; c% f/ K5 p
- BIT PPU_STATUS
, V0 K$ n& Q. o - LDA <PPU_Scroll_H, p o q1 F4 J2 d3 H+ Y
- STA PPU_SCROLL
9 I3 m' \. x' V1 n% ^ - STA PPU_SCROLL
6 D" G* }* o# r5 H+ ~/ [! Q - JMP Irq_Scroll_Over+ D6 B3 f' q4 B- K1 F
-
u8 ^& f4 Q7 X/ z3 L5 y - Irq_Scroll_Right
* Z2 S: R9 q8 x- G# Q - SEC, S! |1 H; A9 ]5 `% R$ g
- SBC <PPU_Scroll_H" m" Q6 q8 E/ d( ^3 n, E Q7 c9 b( @
- STA PPU_SCROLL! J B1 d- t7 l" ]3 a
- STA PPU_SCROLL: N6 [6 ]/ |/ W9 S
- Irq_Scroll_Over5 F1 L: H+ [" N" D
- # o$ }4 x4 \" \. }6 h( I
- INC <IRQ_Index
6 r# b8 \0 y8 V" ~% V9 I% z - 3 r# R7 ]! T* ~" W: N
- LDA <IRQ_Index/ t0 z7 Q$ C4 g+ O" L
- CMP #14! t8 `2 R8 k& [2 G. \7 M* f4 h) V! t0 l
- BCC * + 5
' V% }) L$ S3 j' L* J - ;关闭IRQ
- L! r0 B( _% Q: q4 i! k - STA MMC3_IRQ_DISABLE
) E* e* g& X% R6 e7 R* m - : Q9 z$ o" i! h
- IrqProgramEnd0 [4 G! ~, I( W3 G6 `5 q+ L1 D+ _
- PLA
/ b( ^$ Q# @! g$ i, e" k - TAY- F8 @; G. L) D" m+ S$ u
- PLA5 U" i9 m- C. B$ v
- TAX, b6 {& h$ L3 ]2 s+ `
- PLA0 o( Y3 y1 f! @! a$ Q# \
- RTI
# ]4 U" ~4 P& b; n, W -
3 Y3 I& S7 |) T3 e - ;==================================================
- V' I. w T9 |" P* `3 A C - ;中断表) ~$ W3 m- w: l& K
- .ORG $FFFA' f9 M# f4 Y8 o D% X
- .WORD NmiProgram
, u2 g. l" \. q, i' _4 N' [2 m - .WORD ResetProgram# O0 A, q% T* y% V6 Z% P9 ?- x
- .WORD IrqProgram
复制代码 [/code]; L4 ^+ V* L5 n
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