|
- [code];[FC音乐][MMC3 IRQ]
* o0 d1 b/ G( S! ?% h5 ?0 |. c - ;FlameCyclone 20230710
( S* |$ H- H+ z0 `! K! R( A# b, W - . M( t2 P2 ^* t' m
- ;文件头1 M4 y1 F- u1 i6 M) o( K( K! p
- ;======================================================================
: W) O3 {4 D5 k$ p& k) p0 B5 O - .INESPRG 4 ;16KB PRG 数量
1 t0 U5 n" V8 P ` - .INESCHR 1 ;8KB CHR 数量) u( K# l6 Z& X9 N1 Y' [' b
- .INESMAP 4 ;mapper 4) w5 N4 K: R, S- R. }! W+ F
- .INESMIR 1 ;命名表镜像 0水平 1垂直8 i8 D3 e, Y, j/ v0 @
- 8 I, B8 }9 k7 m
- ;必要条件
K3 ~6 j, M$ p5 W3 Q/ O8 ^ - ;1.持有CHR ROM
6 j3 [8 a% }" o+ a% U$ N! _+ C - ;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$10009 x* k7 t" s1 S% {
- ;3.精灵内存(OAM)不为空; p* x( i- P* D* o0 Q- E
- , B! r5 c! I% s0 A% p7 e' ?. p
- ;==================================================. g! u. D, r& ?/ g
- ;NES端口常量
: d w1 l- }/ l9 V* | - PPU_CTRL = $2000 ;PPU控制寄存器
4 j% s5 a8 }3 V! t. ^! C - PPU_MASK = $2001 ;PPU掩码寄存器9 s0 {/ @ C6 w# t% U
- PPU_STATUS = $2002 ;PPU状态寄存器:读取后PPU_SCROLL和PPU_ADDRESS被复位,下一个写到PPU_SCROLL的数据是水平的,写到PPU_ADDRESS的数据是高位
, |$ ~( z' f3 I2 C: \6 ? - 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- R+ z4 B6 \. e R0 Y. ~( c
- 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
- H5 u2 A! w* r& ` - 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 3 t2 f- \9 Y9 R1 _& z, i7 \4 v
- 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
- _ |: R, I; v3 d - 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
* T; }' P' g3 o% x+ ^0 x# c8 e" 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2 W% r/ H" d& S7 E% J
- APU_STATUS = $4015 ;声音通道切换
1 q' J1 x4 {( ? - JOY1_FRAME = $4016 ;手柄1 + 选通
% X g9 p0 X, V3 |# e: R6 W - JOY2_FRAME = $4017 ;手柄2 + 选通
: I9 K. g1 D5 p `& m( I - # @* l8 R0 z7 a/ F+ k8 j
- ;==================================================2 Z, m6 D1 ~: Z' Y$ w
- ;MMC3端口常量9 q, Q. |6 u* o1 }9 I6 q4 J; V4 ^! `
- MMC3_BANK_CTRL = $8000% F, h. `# E6 V9 T
- MMC3_BANK_DATA = $8001
. D/ F2 [* n( F$ _& ?1 n - MMC3_MIRRORING = $A000
/ C$ k: d1 V3 `* R/ ?4 B. l - MMC3_PRG_RAM_PROTECT = $A001
( S6 O4 }* W/ W7 H' [) z - MMC3_IRQ_LATCH = $C000
7 _ M8 U/ \$ T1 s" C' L+ M( W' `, G - MMC3_IRQ_RELOAD = $C0011 D5 d4 k$ \$ r" S0 v" F# a I
- MMC3_IRQ_DISABLE = $E000, o3 _/ x V8 g' u, k7 h Y! F z
- MMC3_IRQ_ENABLE = $E0014 @& [: X( k+ l, F5 X/ e% D7 N
- : v* `5 n C; w8 i
- ;==================================================4 }, H3 i! `/ |) \
- ;程序块配置, V% F) t+ g& M& e4 T
- BANK_DATA_MASK = $072 N- [0 t8 u4 C1 q7 }- X7 n- E+ W
- ;--------------------------------------------------2 W o; e/ [9 [+ ~& l" Z) l
- RESET_BANK = $07
" q; U7 [' @6 Z, V6 U - RESET_ADDR = $FC008 \& R1 w* r5 @
& O; l5 ^1 _) X- ;==================================================
1 u! D4 n6 u! N - ;图像块配置
2 u4 ^+ {6 t" X* l, b* P0 y - CHR_DATA_BANK = $08# n& {3 o8 A O
- " Q6 ^# ]" b3 H0 \
- ;==================================================. y2 L- X0 k9 {: a' f
- ;零页内存地址配置# b/ _) Z4 x# ?5 L5 }3 y$ m
- Use_Ram_Addr = $80
7 I! L0 {0 m( F" M+ @4 e3 d7 O% O - PPU_Ctrl_Buf = Use_Ram_Addr
" i! V3 g* w) Z0 \. E3 L - PPU_Msak_Buf = PPU_Ctrl_Buf + $01! \& y2 o* u' M1 ], K
- PPU_Scroll_H = PPU_Msak_Buf + $01! G/ }* y- z7 V+ _) x; b7 _
- PPU_Scroll_V = PPU_Scroll_H + $01
* H5 D9 u! M" F) V+ U - FC_Data_L = PPU_Scroll_V + $010 `/ A, h1 k8 Z y2 c8 j
- FC_Data_H = FC_Data_L + $011 w- Y" ^9 ~! s9 ~5 x2 l. V
- FC_Data_Buf = FC_Data_H + $01
# W% G- P2 M, e; ?2 K - ;==================================================, B' {' ?% b4 H( U% ~
9 Z; U+ v4 M! @& x; l( k- GAMEPAD_MERGE_FLAG = $048 L1 [5 R% P* g3 s2 J* t9 x
& ?# O$ ~6 |1 f$ y J% s- Gamepad_Keep = FC_Data_Buf + 1/ A j8 Q, w9 K' w. B
- Gamepad_Once = Gamepad_Keep + 24 s1 P8 X# Z; @4 y9 ^0 ] ]
- Gamepad_Temp = Gamepad_Once + 2
% W4 Q) C. |) `+ _ - & m3 k6 P, M9 {, Q7 n' p) H
- Gamepad_0_State = Gamepad_Temp + 2 J' j/ e- B, I! X5 |+ ]
- Gamepad_1_State = Gamepad_0_State + 1
1 p9 X1 }+ f3 h5 q. V; c - Gamepad_0_Value = Gamepad_1_State + 1
8 e* W( C+ S: Q4 L - Gamepad_1_Value = Gamepad_0_Value + 1
$ a' Q* U& Z) L5 w+ O3 c0 O6 D$ P - Gamepad_Port_Value = Gamepad_1_Value + 1 W6 @7 h& a# s; w5 G3 d' y
- Gamepad_Merge = Gamepad_Port_Value + 1 Z9 f% [' V% e
; ~( y, n& F5 D! q% y o- ;==================================================$ h7 d8 l& n, C
- IRQ_Index = Gamepad_Merge + $01/ V3 _2 B, G4 P- N$ `* h
- ;==================================================6 A9 C$ h ?* }0 [3 Z: o* x
3 j4 w/ W" h& V! T- ;CHR图形数据5 R! J; o' y; A2 i3 k6 {
- ;==================================================
; w/ q$ J& E8 k; _. ~! ?1 N - .BANK CHR_DATA_BANK' T0 k& C. W* ?! y9 i' |: H
- .INCBIN "chr_bank/chr_data.chr"
/ \3 m7 B- }8 x, K% ?. W I+ m - 9 \$ Q7 C2 ? N$ K( H
- .BANK RESET_BANK & BANK_DATA_MASK
$ u0 |6 b$ j( M: E+ y - .ORG RESET_ADDR1 |( \5 D6 i0 l: W1 E
- 2 w/ v9 j3 G0 g+ f- h/ G
- ;--------------------------------------------------
% v4 } S. a) L3 i6 K - Attributes_Data
) L9 w& I8 R- z( Z V6 x. v; Y - ;命名表属性" y/ e' L" y, z) y0 j
- .DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00! B- I5 G3 z& }# i; S: ~
- .DB $50,$50,$50,$50,$50,$50,$50,$50,$FF,$FF,$FF,$FF,$BB,$AA,$AA,$AA
) ?' B- d A- \/ _* W1 B) R. f. u - .DB $0F,$0F,$0F,$0F,$0B,$0A,$0A,$0A,$AA,$AA,$AA,$AA,$AA,$AA,$AA,$AA+ m q# w9 P$ Q/ o6 P% }5 ^
- .DB $AA,$AA,$AA,$AA,$AA,$AA,$AA,$55,$55,$55,$55,$55,$55,$55,$55,$55
# Z& @5 M3 y- F8 q - ;--------------------------------------------------
) }# C1 ]9 ?1 B) U - ;调色板数据- [! j* }7 }4 o9 Z" {( N
- Palette_Data' x) L( ]" A& v4 r6 b6 ?% L5 N1 z6 g; E
- .DB $0F,$27,$20,$0F,$0F,$24,$20,$0F,$0F,$21,$20,$0F,$0F,$25,$20,$0F' y8 ~1 R( |6 A
- .DB $0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F+ i# F) \2 D: B4 ^1 x9 y! }/ ~
1 y5 N, O8 k) j& `# L. E- ;==================================================) A" S! A( j: s
- ;命名表初始化: i4 Z r( v7 r$ w; t
- Init_Name_Table
, p. a& F1 |+ l' t4 T - LDA #$20
" F# ^- Z; O1 ]+ M% m/ i/ H - STA PPU_ADDRESS3 D, d# u [ T6 z* |; f
- LDA #$005 X8 `, k9 \' f. f
- STA PPU_ADDRESS8 g8 r. R/ K* |& E4 |" l; |) o
- LDA #$00
2 n1 `+ p" v; L3 m4 k( K - LDY #$00* y& T( ?+ G9 h q& Z; ]' v
- LDX #$10
+ a, N3 C' G/ K2 J( l - Init_Name_Table_Write
/ f0 j9 R) v5 m# ?, R% P: l - STA PPU_DATA
8 Y: A% Z' ~& i! \4 R0 ~ - INY
- |) N( Y: {& `! x" R - BNE Init_Name_Table_Write; c ^* s/ O' g: G5 t3 Q8 {
- DEX
2 j& A9 r9 p6 O8 y& I4 {% s- r4 ? - BNE Init_Name_Table_Write
$ H1 N' n% U! e - RTS! U, _/ f- Z/ n; ^1 n3 B. I. j
-
* o' q( }( n( H# D( u2 ~/ R - ;==================================================- O/ b0 |1 @+ ~
- ;调色板初始化, H1 R5 A5 C, ?# _
- Init_Palette
. o8 S; S7 L" S( a1 e) A - BIT PPU_STATUS5 a- c/ I! _ l0 V u! p
- LDA #$3F7 J4 V; y5 Y! |9 F u2 ]1 u$ L
- STA PPU_ADDRESS7 j9 x, l+ k. e1 Z, s# [
- LDA #$00
3 e' `+ S5 ]1 c2 ^& ]' z. Q d - STA PPU_ADDRESS% `9 U1 t$ l) o7 c% t
- LDX #$00- U& Z: u0 l5 v
- Init_Palette_Write
" s) ?1 ]6 R- s( n& _ - LDA Palette_Data,X1 {7 x3 Z. ~! i* k: A
- STA PPU_DATA9 K7 j7 E, L/ o/ D
- INX7 U% L$ `- \9 F
- CPX #$20: J" ] l8 u! E+ S% C+ p" F9 @5 @- \
- BCC Init_Palette_Write' A- D0 u: T, v7 S6 ?
- RTS
8 b. y( S% V$ e6 l( } - 8 m' d% K5 D, X$ P6 s. K! G
- ;==================================================
# B, M X$ `/ V2 R7 ^0 c2 R - ;设置命名表属性3 L, d- ~& L- |) ^2 s
- Init_NameTable_Attributes
( `6 v. U7 a* _ - BIT PPU_STATUS
% [7 L' T9 C5 r - LDA #$23
: l( U7 x+ j7 @2 W$ I1 W1 l - STA PPU_ADDRESS; x3 r. {3 K8 ~, {6 a* X- j: B
- LDA #$C0
" X; U0 c+ s6 E" J1 f - STA PPU_ADDRESS" R) u8 ^" D; R9 l; V% v
- LDX #$00$ {9 Q0 R: L" S8 l4 n
- Init_NameTable_Attributes_Write. G& r9 @5 B6 D: _! R
- LDA Attributes_Data,X3 r) |/ B6 A1 J4 |$ k$ `
- STA PPU_DATA$ G/ X6 |- R: \0 G. r+ c9 _
- INX1 P5 z, U }6 A7 x( R' Y- e: F( [
- CPX #$409 F, s+ e% a$ C& l) J
- BCC Init_NameTable_Attributes_Write
) j/ ~' {" i1 z9 p2 @' p3 P, I8 N/ D - RTS
. N8 W" q- {4 w' h - & O8 \( l1 R% h7 p4 d1 J
- ;==================================================' a# z( z, g2 O3 y) B
- ;初始化命名表文本
0 c8 E0 }7 P5 N/ J; a - Init_Name_Table_Text
: k$ R2 L9 r! N4 w* k; C$ N - BIT PPU_STATUS; d9 S9 w \; X0 G" i( m
- LDA #$20
9 R4 j7 y8 i) Q3 r - STA PPU_ADDRESS
5 o$ U' i0 b- X$ g5 H. j" s0 P2 A% P0 y - LDA #$00 H/ F% A! F5 K* ~! q+ s
- STA PPU_ADDRESS: s5 l0 s( V p& `1 `/ E5 G
- LDA #$004 q( C1 z! b9 ~3 `5 U6 F2 Q# @
- STA FC_Data_Buf
3 S* J7 V7 q0 y* _2 h3 g6 Z - LDY #304 _! {- n2 H( V! d& i/ @
- Init_Name_Table_Text_Write8 e, v+ X& v% A
- LDX #32
+ M% l" G% M! F! |+ f/ t - Init_Name_Table_Text_Write_Char) H/ K2 O, Q u' f. X/ A% D& W
- LDA #'0'& E5 D6 z8 ?2 W2 l& Q* L1 W. C: X
- CLC# I, Y$ @7 d' _& L9 o$ ]
- ADC FC_Data_Buf
% S0 n: y' e0 \" ~* K - STA PPU_DATA! H, F1 G3 c, d
- DEX
* O" l. w8 r T* d - LDA #$14
; B, S* G0 g$ M. h# P - STA PPU_DATA: P3 {0 |) a* N1 f8 }, @
- DEX
8 T S1 L/ M: }! x - BNE Init_Name_Table_Text_Write_Char! B" {+ x9 b; c
- INC FC_Data_Buf
, f5 V& a+ Q' @$ E5 G - DEY1 M/ v9 U8 p3 ]' r; z M
- BNE Init_Name_Table_Text_Write9 W) i2 g' A' g3 j0 {/ U3 a
- RTS
8 F l7 C: {9 ~9 Y* W! P ]/ F, X Q - 9 K' F+ ~# z) ^: r! m5 q
- ;==============================
; F4 y& k9 ?6 ~# y1 A# P! r6 y - Init_OAM_Ram;初始化精灵内存
1 O2 e# d' q" P1 w - LDX #$00
0 ]3 C/ {1 h0 O; ~ - LDA #$008 R6 D) A9 `6 x" O4 O# }3 o/ _; v! G% M
- STA PPU_OAM_ADDR
, y$ J2 y1 ]1 i3 o- \$ Y - LDA #$F8) R9 `( o. I3 H, T# D7 V$ Z) I
- Init_OAM_Ram_Write. Z% ?5 L3 p! B
- STA PPU_OAM_DATA
- j6 [5 y" J8 [6 B" w# t8 m - INX7 F/ z9 w9 m i
- BNE Init_OAM_Ram_Write
5 B- @! P6 m8 o# i7 I - RTS
, k, d0 s* v5 t3 T' m. D; A& t; O4 U9 _ - ; [; j _3 ]9 f. y
- GamepadProcess;手柄处理+ \5 s9 c1 a2 P. _* \# h+ f G
- JSR GamepadDatacan
0 Z/ J% b. t8 I" l - LDA <Gamepad_0_Value
# E1 r/ Y: G) G+ ?6 u - STA <Gamepad_0_State
' S, I9 Y, N0 s0 p3 G, P - LDA <Gamepad_1_Value
* T% O/ Q+ N' V9 h# V8 w P9 F% A4 O - STA <Gamepad_1_State8 N8 _& q' { h8 e6 K2 a4 J" D
- JSR GamepadDatacan* x; X6 s5 q6 a4 U2 K" p- u: k; s
- LDX #$01
8 s/ v% G- \& t6 q% f$ a! b6 k - GamepadMergeCheck;合并手柄输入检查
3 s6 ?( q- u- n( M) u0 r+ H" u - LDA <Gamepad_0_Value,X
: [5 q7 I9 y* P5 O( R1 f* M - CMP <Gamepad_0_State,X1 R. I& d- ~5 u' K& L: t3 o* B
- BEQ GamepadMergeInput
9 v3 O7 @, A e1 V2 p- m - LDA <Gamepad_Temp,X
/ Y3 q' Q, ]- Z( w3 a - STA <Gamepad_0_Value,X
: R# M( ^8 c5 d* ^8 } - GamepadMergeInput;合并手柄输入
+ w: x! T/ X+ t& ? - DEX; k9 N+ x) p5 e$ ^. R) _& W
- BPL GamepadMergeCheck) P: Q4 \2 E I) C8 S$ p
- LDA <Gamepad_Merge, `% E. K2 r) o4 K* }2 y, j
- AND #GAMEPAD_MERGE_FLAG
3 r: L8 ~$ Z& d; ^& r; s - BNE GamepadStateProcess
' d6 o M; T+ z* L; l+ o - LDA <Gamepad_0_Value
( }" z: z, Y% J/ Q5 U. Q; U( \ - ORA <Gamepad_1_Value1 g* |' n- U' U! I4 y
- STA <Gamepad_0_Value3 a3 v8 e+ M+ P2 s, j
- GamepadStateProcess;手柄状态处理 b8 W8 \, ~8 T+ |" w. G3 C
- LDX #$01% I# o1 D; q0 I9 G/ W
- GamepadStateSave;手柄状态保存
# A+ x0 _0 N' c: x; V. [ - LDA <Gamepad_0_Value,X
9 I1 Y: Q$ r0 ? - TAY
, F- G8 f- d) O/ G5 ?- x! } - EOR <Gamepad_Temp,X" ~1 D$ f: m$ u ~- _/ t, V! @
- AND <Gamepad_0_Value,X7 _; a' X7 T) @6 ~
- STA <Gamepad_Once,X1 H4 O5 J. r+ T& k- E! s9 D
- STY <Gamepad_Keep,X
# t1 B, k$ b" @5 J( u4 H1 B - STY <Gamepad_Temp,X
& m) Z7 L. R& J# G. ?1 d - DEX
" f& c3 g- W, K - BPL GamepadStateSave6 u. n3 E O* n% I2 v4 f
- RTS
" p% ^; H9 e$ m" V5 |& o
# y4 C A5 u. ?6 V- GamepadDatacan;手柄数据扫描
* \$ H8 [, \, S: a7 x - LDX #$01 F: W9 r5 i! @
- STX $40162 f# a$ Q) ?# P9 E |
- DEX9 y; l P3 j! T$ ]6 y
- STX $4016! v Q/ X4 t Y: ^) f3 S
- LDY #$084 s7 E% G- ~: j3 p
- GamepadPortScan;手柄端口扫描7 P! p* W/ E3 G' |% K8 Y
- LDA $4016+ k6 c' C5 R! u8 E5 W
- STA <Gamepad_Port_Value% G, A* ~- g' W# x) m
- LSR A
3 q X& }0 i. ~* S% j2 x: [ - ORA <Gamepad_Port_Value' I4 p* J$ S# m1 R
- LSR A* N7 R: [5 R8 ` y {/ q
- ROL <Gamepad_0_Value& U3 k5 B7 q2 M# P, k
- LDA $4017: q k3 B. Y6 I- M
- STA <Gamepad_Port_Value
: t8 _, r8 ^& r5 K4 U - LSR A" S8 \0 k4 c; N. m4 V! M
- ORA <Gamepad_Port_Value
2 T2 U+ Z$ ?6 K w C - LSR A
& k7 J( l# L7 A& _! a: B - ROL <Gamepad_1_Value
$ x e4 g5 j; r; i# R8 B: f$ \ [ - DEY
! [8 f' E: h; ^ - BNE GamepadPortScan2 Q( N6 d2 j( U! a8 C
- RTS
. P* ]8 Q! v$ E - 8 e" I6 `& O2 s" {7 H9 P
- ;==================================================
% E. t, c, O! s - ;PPU处理
5 x; G. l; r& J! T* o - PPU_Process
2 @, \+ R: u/ [ - LDA #$00
' O4 }- S7 E5 i3 M - STA PPU_MASK- ?7 [" f, Q6 t$ k1 e2 ^" s; L
-
; y) K- Z( L6 Z Q0 U - BIT PPU_STATUS& X; K, i5 t1 Y; B z
- LDA #$203 P. o0 e- \3 I( p
- STA PPU_ADDRESS1 I, H4 P: i2 h) h/ |
- LDA #$00% U9 _- K, U% q" m
- STA PPU_ADDRESS6 V* u% `6 s8 K/ f: ~0 n
- + X; x: o" R8 K
- STA PPU_SCROLL" a8 S2 O% R' S! x
- STA PPU_SCROLL
- p0 P( f5 t; I9 E- S - , f) o. ?4 C, S
- LDA PPU_Msak_Buf( b1 T- X6 i# C3 c. t. a g
- STA PPU_MASK; t; [) ^% ^/ x. ]
- ; I9 h% m+ b$ z$ w+ L7 C
- RTS" w1 O% s2 c# L* e8 X' R* p+ i
-
+ h# ] q% j- ? - ;==============================" \* V8 D) d; n' T8 I: H
- Time_For_Vblank;延时等待! [) ~+ J: }& D' \4 U4 @5 _
- LDA PPU_STATUS' h. h; E* @$ N5 [2 `4 L) ^0 y
- BPL Time_For_Vblank ]4 y8 I" r* }. y
- RTS4 [( |/ p( J. W. p U
- ) V( k& _6 p. S$ q$ u2 d
- ;==================================================2 L" }, A; D2 _' P0 Q* U" u k4 o
- ;初始化MMC3
# \2 g1 \( M S- Q, \2 r) h - Init_MMC3
5 k( Y) V! q2 p% E$ O' V% g" d - STA MMC3_IRQ_DISABLE
Z' h5 ^, t+ \+ T+ G; @ -
! i9 e7 Q4 z- j2 } \' T - ;设置MMC3水平镜像
/ W" g6 X- s0 S' B/ c, n8 t - LDA #$01
# c- o. J3 _1 C: i1 N. c: y - STA MMC3_MIRRORING
( i- r8 k; I8 B8 }, k1 J( B - ' [$ j* `9 Y! |/ [, h0 u
- LDX #$05, k, ~" k, a& J4 z: O# ]! t
- Init_MMC3_Chr_Bank_Write6 G5 V" y: `& ]3 E m9 Q
- STX MMC3_BANK_CTRL4 J& Q; {: E' `8 S9 Z& f k* b
- LDA MMC3_Chr_Bank_Data,X
" P) V* m7 I2 j; a; m5 ]0 a" ^) L - STA MMC3_BANK_DATA
1 Q [, J' @" N6 h1 g - DEX
: d& V- z+ V& i' d1 ]6 K. m - BPL Init_MMC3_Chr_Bank_Write- M: i' R0 |" ^2 ?, l
- RTS) P9 S) e1 F" m+ V; v5 S
- ;--------------------------------------------------
( j8 w5 j+ F P7 `5 b/ L7 J. N - MMC3_Chr_Bank_Data0 t9 D% e9 T+ P8 ?- h& F1 e9 W# v
- .DB $00,$02,$04,$05,$06,$07
! ]4 v% b1 w- y% z* ?# l4 {$ ] - 1 _8 d. l" ]* `. r& n' i" w
- ;==================================================
, S% R$ X/ M5 Y# I9 Q( J6 d - ;重置中断处理
& q: p" Q. k- I3 U - ResetProgram
. O$ y; [2 [4 L& v$ T& A+ I: d5 s - SEI. h1 i; s- R6 F/ R
- CLD+ C q$ i5 M# U
- LDA #$001 v- u2 y, J* o2 u, w
- STA PPU_CTRL. A+ Q3 }! T u
- STA PPU_MASK
* a$ b8 K8 M/ ~ H3 i) | - STA PPU_STATUS1 ^/ o- c' z1 \ A
- STA JOY2_FRAME6 y. t6 [7 y m/ D7 I* @6 f
- STA APU_STATUS
0 y( m2 U; ?+ O# X -
" m" g* |/ Q% V k \# J2 I - LDA #$C0
' E; D. K# ]; p% z3 R) a - STA JOY2_FRAME
2 s9 b8 W! D8 i X4 w' J$ L - 0 N/ ]" ?& r! @ V; Q$ |$ n
- ;等待vblank( [( p9 F. f$ ?. H- f9 _
- LDX #$02
9 t$ C/ Z4 S/ k# ^ - Vblank_Wait_1
& [* @" J1 } f; D% T3 N8 {: B/ ^ - BIT PPU_STATUS8 @5 t" i* p* O; L0 q! {
- BPL Vblank_Wait_1" P8 l- T$ J* G: H% h7 h
- Vblank_Wait_2% O5 [! ~- ]9 Y/ @" g
- BIT PPU_STATUS+ V7 {/ r$ K4 ~) p3 t* D
- BMI Vblank_Wait_2/ |; x. t8 l3 w+ y. a) ]
- DEX% T+ T; P- `1 N' v: F
- BNE Vblank_Wait_1
& `; j, d. T8 }* y5 O6 G: J* ] - $ s: A, F1 G% k* X% n
- LDX #$FF
( ~6 F( G' j# ]5 `* R - TXS4 y W9 u: {6 r+ y
- 5 S% K4 E3 ?3 T/ {- q$ u
- ;初始化MMC35 m+ r4 o& v9 I2 Q4 j1 s9 j+ ~$ Z
- JSR Init_MMC3
$ d) ]6 e0 o( f9 }% H - : ]/ L7 b+ x: |4 h
- ;==============================- |/ _1 p E0 U
- ;RAM初始化
7 s0 ^; Q5 e4 s/ o T( R - Nes_Ram_Init" X" R' w4 ^; H
- LDY #$008 V1 T# ^' b; n* Y
- LDX #$08
' c% q6 Z7 ]2 w/ D0 w0 G. Z - LDA #$00
9 ?1 B9 ]; g; q2 t4 u% D: q2 G - STA <$00" S" B7 c. b* _: v
- STA <$01/ q' F- p, ^3 g: X! y7 F
- Nes_Ram_Init_Write
, V5 N2 W5 y# l - STA [$00],Y. U, N2 {; d$ C2 a0 T( r
- INY
& x( m8 e* b: \: j - BNE Nes_Ram_Init_Write
' T8 D$ N4 W) K! a) t - INC <$011 W" @2 x9 u$ B) ?4 U9 z: l& `
- DEX
e1 M9 d. l8 u3 ^ - BNE Nes_Ram_Init_Write6 _7 y& G Y9 `- e% d% D! {) U4 q6 |
-
, F+ O B7 ]! |/ y1 w) K% x% c - ;初始化命名表7 {) ? E& ^, l, K3 t) T+ O
- JSR Init_Name_Table% b% c1 g; A. O1 V6 |4 [- u% T5 M
-
7 D/ I9 \+ Q) n: [. c+ u) Y - ;初始化调色板
" R9 j7 N* h; P- T0 u1 i - JSR Init_Palette7 e; K3 S7 X6 t4 p2 A8 A5 o
-
5 N- s" E, _- C+ i8 p5 j - ;初始化命名表属性
' a, j$ p8 Z& L, F" @7 T: G - JSR Init_NameTable_Attributes1 T/ `5 i' n- w5 h' R$ W) ~
-
7 b# X+ }8 [3 d* C! _# w - ;初始化精灵内存& t' U% l1 E$ Z" w: H- N) U8 X
- JSR Init_OAM_Ram
, t2 K& f9 t }4 V2 w- e- @. U( y; k -
7 d0 V8 K, g1 H# B - ;在屏幕上写点东西
2 _+ g" o& ^/ _7 x( b - JSR Init_Name_Table_Text0 t5 m! q+ o( @. T/ a% p) B
- 4 k7 ^& m: o3 k2 F* R8 u& z
- JSR Time_For_Vblank
/ p( @# P5 o# j - ;开启PPU控制+ ^6 Q: d2 _& _2 J
- LDA #$A8
0 f, k/ F+ e6 w3 a3 P! C - STA PPU_Ctrl_Buf
/ f9 O/ {3 s- t/ w5 Z7 x1 Z0 P, v - STA PPU_CTRL
5 T- }5 J) W) M. V% X, p -
7 g! C9 Z: e( c/ Q - ;开启PPU显示
$ w( s: {( S, L+ A+ t - LDA #$1E5 d9 U% w/ N7 z) Q% j
- STA PPU_Msak_Buf* P* `4 z+ c; D0 {$ \" k
-
4 H2 [+ [- |* i5 y" K - CLI
E3 |. {) Q5 V& q( p& g+ O- ~2 i - JMP Loop! O" U" U% ]' { _8 \$ y
- & W1 H U" u/ x% h+ x% ?$ `! G
- ;==============================
' x- d5 U& M- @! _5 {* i - ;死循环, 等待NMI中断9 p+ \* D5 i. u( S9 [" H, S
- Loop
) F3 H* U& Q/ R/ B& x- T/ ? - JMP Loop3 I2 R! d8 G, {. N* v
- . M- r) ~6 |% r2 Z2 O
- ;==================================================
0 h" e7 P; g5 [6 g# O# T7 z - ;NMI中断处理
0 p; J0 S+ a' W' m" l - NmiProgram
5 u7 h- B# m0 e% } - PHA- G0 `0 R" _* @7 D) ^& o
- TXA
1 p n! f) x3 }5 n: ` - PHA7 a% @+ t& l" R% j5 ?
- TYA& c5 [0 j1 z( P! L! v$ x- n
- PHA. {% s" k I% e/ ~) C+ ~! n% h
-
0 V1 `6 g, P7 f7 e0 }7 y$ U3 j - BIT PPU_STATUS
* K. u% [- V7 i! i6 N -
: b/ c- x) n! L0 z - ;关闭PPU控制# R: v8 f8 C& K$ W' p& H, u, j
- LDA #$001 }, l" ~% s0 o b5 n' ~ k
- STA PPU_CTRL
5 M; ~/ E! Z% g" d Y - " i( z4 I, b* u2 f
- ;处理PPU
# I: k5 C% T! i: b$ [. O0 o: `. z2 o - JSR PPU_Process
& O1 l- e6 d, e1 l+ E4 J - ; D6 ~8 t# U, p
- ;开启PPU控制8 H: Y3 {. H2 C& S$ k" H( B7 E
- LDA PPU_Ctrl_Buf
; ?2 L9 M+ Q* l& y- } - STA PPU_CTRL
* }6 s9 `# z5 ]% A -
4 ~ r$ R( k, s0 e4 a8 s+ p$ m+ | - ;手柄处理4 p9 ]$ H( I* s& Q+ O) N$ o. z, \
- JSR GamepadProcess/ u- L% x# d( _+ R5 ~' y# J, c: G
- 2 X2 d$ |! i2 g( e2 E5 Q1 e* r
- LDA #$00
4 \' f) L y% E7 O1 e9 T - STA IRQ_Index% @" }* e- t; r4 V( ~
-
! j C* f7 `) r. W9 `/ x - ;启动IRQ中断, 第15条扫描线触发( T+ l. L+ a2 Z7 o8 S9 t1 x
- LDA #15 + 1
) T3 X$ J! T1 n0 h1 @6 ~ - STA MMC3_IRQ_LATCH* h# U0 i4 a$ ~0 a+ b+ ]$ a$ l" j
- STA MMC3_IRQ_RELOAD
$ Q# A! t! n$ V; A/ |0 W - STA MMC3_IRQ_ENABLE
# L! g* R' [1 y - CLI( i. N# f9 O/ ]7 _* H0 v
-
" t$ p: G9 H# ?" ~ - PLA
& M N* g2 d- L3 M% V% I+ D - TAY
& I4 |) ~/ n* D2 ^ - PLA, z) d0 H) s1 u% l
- TAX
. E. \/ Y$ i( S4 K. Q - PLA
4 H" H1 r. W( e9 _ - RTI
3 d+ O3 n6 ?1 m: L
5 D4 |* N2 x, ?$ I' h- ;==================================================- q% A* i/ Y5 ]0 r& V
- ;IRQ中断处理: v( r- C9 o6 a6 E
- IrqProgram
/ p6 q3 b% B) U0 e" R) y5 Y# w; `1 z - PHA. D2 i8 c& k1 N7 f* m
- TXA
! U9 Y) N t- ~0 g - PHA
/ [3 `! W. h% q+ J6 ` - TYA1 l5 l f: z; z% T2 ]+ r+ f
- PHA" \3 V8 e7 j: k7 e2 S
- 8 s# ?* j2 ]. `. g3 G% I
- ;关闭IRQ8 m) b% V4 p g1 w2 D8 y7 h. c" _9 r3 a3 q
- STA MMC3_IRQ_DISABLE+ K8 h5 I2 H; p7 c% Z" I3 c9 b
- 1 `6 ]1 i1 R* t$ H! R5 x
- ;允许下个IRQ触发 u, I/ V. T- C. ~1 D6 j: f
- STA MMC3_IRQ_ENABLE+ l: o5 _2 w1 c) R& [+ ?& S4 C8 ^1 E
-
) D9 i$ Y) C$ g$ Q- J; { - ;IRQ处理, 15线后继续触发
" [" s; E2 B5 ]. A/ x# l" R2 o - LDA #15" T- {- V& Q4 {" _! y+ u
- STA MMC3_IRQ_LATCH# X, e& Y6 X- D* e: Z; Q3 {
-
" I/ D7 Q; c% V' { - LDA <IRQ_Index* o7 C: ?1 M3 S& H
- BNE * + 41 `) Z: F2 O0 y! ?1 Q3 ~
- INC <PPU_Scroll_H
; A0 y" m+ P' m# [8 c9 P -
1 \0 t% ]1 C# K7 K - ;设置屏幕滚动
* v" _3 f# h9 H3 k/ v: c: Z - LDA <IRQ_Index
, x/ g3 b! [/ U! t+ q, z - AND #$01
6 k d: X( ?; {: q4 N: X! Q - BEQ Irq_Scroll_Right
- c3 n9 J) D" H) s
a. _+ D/ u% u3 X) u M- Irq_Scroll_Left7 s+ L I: B3 t
- BIT PPU_STATUS# ~5 Y. T, T* l H
- LDA <PPU_Scroll_H
1 F b4 m8 W5 z0 A: }4 E - STA PPU_SCROLL
4 w7 O. s( y4 R, B q - STA PPU_SCROLL
" ]4 ]9 H- @) B - JMP Irq_Scroll_Over
5 B0 \8 r8 m5 _; P, o! u - ) m( |$ P" h) Z; {" |8 S
- Irq_Scroll_Right
7 T. {. i5 C" G4 ?0 T0 c3 C P - SEC
2 x M9 i9 N) Q' q7 s$ v+ i, ~ - SBC <PPU_Scroll_H
8 ^" A5 }/ P! a% a F - STA PPU_SCROLL* K9 A3 _4 h W4 f
- STA PPU_SCROLL. O9 y; S- A q4 A1 J, K
- Irq_Scroll_Over) }, p" c, ` U( _; l; |
- ' t" W: E& w; V i
- INC <IRQ_Index
$ z w- ~8 y* ]: s/ l -
$ r2 n' [# {4 d& E/ c - LDA <IRQ_Index- C+ a( c K3 t; N6 I# o
- CMP #14
2 ? q; |4 \# T/ D5 s - BCC * + 5, m9 Y" p0 s/ x7 Z( Z
- ;关闭IRQ% [% U4 \; |! X+ O6 G. q
- STA MMC3_IRQ_DISABLE& v9 R0 v- H4 z0 b5 s& Y- r6 v' q9 A o
- 0 q J5 c2 W* z4 U, S" l$ R
- IrqProgramEnd
3 m6 e9 a# x1 e) s8 Z - PLA
, g+ v4 V& A' |4 o. z9 z - TAY
3 F) Z; P: C: i- C A - PLA4 g' p3 {8 c; L$ z3 A& d0 h
- TAX
- @' S& j( e& N, V5 ` x: ^& f4 T - PLA
. v. e( v% A3 k4 H- K5 X7 I - RTI. ]# d1 q9 n* H- b
-
1 ^5 Y, A! H4 z - ;==================================================
7 G4 } l7 \6 I" c2 V - ;中断表
/ N. o$ P2 J+ {, i( o; o8 ^ - .ORG $FFFA
8 K8 L/ U( U* Z& ], D6 O; J9 Z - .WORD NmiProgram
9 M2 Q5 e( ?+ ]* H - .WORD ResetProgram. E- C$ M/ e, L, ]
- .WORD IrqProgram
复制代码 [/code]
" N, z; c6 s4 L |
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