|
- [code];[FC音乐][MMC3 IRQ]1 f# L# i) I& B! q. W- D
- ;FlameCyclone 20230710, Q' F: h3 G! c# r2 y, ?
- , v$ ]0 A0 ?2 O
- ;文件头4 i6 U2 P# r' i& M; ?5 \
- ;======================================================================7 V7 t9 H* N: n, m
- .INESPRG 4 ;16KB PRG 数量
: A1 U) ~6 E( [% G1 G. q+ q - .INESCHR 1 ;8KB CHR 数量0 `) H) j: T, Q( @2 {" g
- .INESMAP 4 ;mapper 40 i% H+ m4 D. |3 V0 _( C* o
- .INESMIR 1 ;命名表镜像 0水平 1垂直
, a1 @. M- `; H; x - " X9 r1 s( U% ~( V ]" N) l7 A
- ;必要条件# ]4 Z! J9 s# U5 a
- ;1.持有CHR ROM3 A, v9 [4 W5 ^! z- {( Y
- ;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$1000 s4 B. m; i: n, A5 x: N
- ;3.精灵内存(OAM)不为空- Y! n+ B% `& o2 c" ~1 ?% C
- & X" U+ n- j$ B: P' }/ }2 M
- ;==================================================
+ Q$ M m& a9 g3 N" V) k8 d - ;NES端口常量* Z" {2 U) _ M$ @( W" N6 V
- PPU_CTRL = $2000 ;PPU控制寄存器
2 Y# A6 B0 Y4 R% p' K& ]& Z - PPU_MASK = $2001 ;PPU掩码寄存器
! j8 R; e$ U- l; ]3 V# F8 c - 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
. |% K8 M6 o! ^5 n - 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12 p+ B" M# L' b
- PPU_OAM_DATA = $2004 ;精灵RAM数据:用来读/写精灵内存。地址通过PPU_OAM_ADDR来设置,每次访问后地址增加1
. w- a" w! k. l y* A/ a$ ~( H7 N - 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 8 M6 s6 b; _" \% R m
- 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
7 G& C" U/ B! N6 L3 e - 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 ; ^4 _) u" M! 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
( v+ i6 @8 {1 Y( [ - APU_STATUS = $4015 ;声音通道切换/ X0 {- y7 w2 i
- JOY1_FRAME = $4016 ;手柄1 + 选通
6 X0 C. _3 `# r( v - JOY2_FRAME = $4017 ;手柄2 + 选通
: v7 q4 s+ N( u/ Y0 r
1 d) S5 b# r! i* n- F: S0 a- ;==================================================
2 ?/ p q, u2 B) a7 y2 f$ L - ;MMC3端口常量5 r+ }' }- l" L2 j8 o
- MMC3_BANK_CTRL = $80007 L8 [' @5 E# ^: p% |, I; D
- MMC3_BANK_DATA = $8001
; e, a, T+ [- w* r! u - MMC3_MIRRORING = $A000
8 m6 ^; b: L5 u" Q' D( x9 ^* y - MMC3_PRG_RAM_PROTECT = $A001
# V8 g m8 V( F1 H0 H - MMC3_IRQ_LATCH = $C000
: @% Q, A# A/ ]1 \1 q - MMC3_IRQ_RELOAD = $C0013 V; B6 h0 T* l3 J" I
- MMC3_IRQ_DISABLE = $E000
. }" c; F7 p( W! F - MMC3_IRQ_ENABLE = $E001* x7 ~' [. L k4 [$ b) d
- ; w1 S8 v9 [; Y; o0 j/ k' ~$ E8 N
- ;==================================================
8 |* b2 T% [: O3 { h: i) G7 o) ~ - ;程序块配置
) c6 }1 b* I" O6 x+ B - BANK_DATA_MASK = $07
9 u9 k# Z V$ S - ;--------------------------------------------------
( @4 q; X& R5 l3 A - RESET_BANK = $07
* ~& V9 A7 r7 { - RESET_ADDR = $FC001 x4 e) {6 |6 C l' v+ }, B
+ w! c( m7 q" |- ;==================================================4 B, H( Y$ D2 Y. g$ e' Z
- ;图像块配置6 L) o$ j) k' P" A9 {0 d+ |5 j
- CHR_DATA_BANK = $08
( [+ \. ^: h5 ?: V/ t7 _9 l8 h: f - ; a- L. D) r( Z d% }! U
- ;==================================================. \7 I0 G$ R5 }1 S! V R
- ;零页内存地址配置, o7 ~) r2 I1 U! `& W' I, `
- Use_Ram_Addr = $80
1 P4 B; F( q5 l# e - PPU_Ctrl_Buf = Use_Ram_Addr
% N! K/ B1 p2 U+ b; R! W _; S) ~+ e - PPU_Msak_Buf = PPU_Ctrl_Buf + $01+ [2 i; |2 L& k' {' ^# m( X% N8 ~
- PPU_Scroll_H = PPU_Msak_Buf + $01. e- A6 t; A: P$ B' H5 y
- PPU_Scroll_V = PPU_Scroll_H + $01. V8 k! l& X7 E* U
- FC_Data_L = PPU_Scroll_V + $01
2 ^, e% Z) `# g$ y" c - FC_Data_H = FC_Data_L + $01
Z, U; o2 {. N" q5 k - FC_Data_Buf = FC_Data_H + $01* @* | c) L: x
- ;==================================================
3 X4 J* K0 k2 O! @# k8 W% k - ) Y4 x. r! p u2 ^
- GAMEPAD_MERGE_FLAG = $04
5 N( j8 J: o1 F; P- Y( q- f6 z2 P
5 I1 W" Z: S' f) d0 u: Z- Gamepad_Keep = FC_Data_Buf + 1 @( B" k* s7 C: ?+ v
- Gamepad_Once = Gamepad_Keep + 2
! m! z4 l$ l0 ~$ k3 `' b2 v - Gamepad_Temp = Gamepad_Once + 2! X" G, Y+ Z$ l' U
-
c4 e7 f6 t) z+ }! G! l - Gamepad_0_State = Gamepad_Temp + 2( R3 D$ w) i5 H5 a' I' G
- Gamepad_1_State = Gamepad_0_State + 18 w% \5 a+ {" ^$ s) U9 p: x4 m2 O
- Gamepad_0_Value = Gamepad_1_State + 1
' J8 F9 M) [6 c* W, a% G - Gamepad_1_Value = Gamepad_0_Value + 1- c& y8 R4 I6 M, b8 Q7 [
- Gamepad_Port_Value = Gamepad_1_Value + 10 ?) y. c' A" F# ^' E/ K" g
- Gamepad_Merge = Gamepad_Port_Value + 1
% {% k) M" o& ~- s$ p% X' r
3 S6 @5 T1 G* j* w- ;==================================================
9 o! z/ D; x7 ? - IRQ_Index = Gamepad_Merge + $017 @7 O7 o+ m9 }( A+ t1 Q/ S5 t
- ;==================================================
, h7 z6 D2 Y: |+ |& _! x3 i
4 y6 q4 S% Z d' I. U- ;CHR图形数据/ l3 H# g0 Y( U4 K9 l: |1 u
- ;================================================== G s. c. ^2 J
- .BANK CHR_DATA_BANK; c% |$ x2 l8 ]7 M
- .INCBIN "chr_bank/chr_data.chr"
& Z, r; W. j( `- b- t9 O% [% K$ u - * {8 T6 o0 T% z
- .BANK RESET_BANK & BANK_DATA_MASK
4 B' Q% u0 v$ x- ~+ L& r - .ORG RESET_ADDR
4 Y( W4 |" I4 @ -
9 K3 _4 c2 |3 Y/ O; F0 j3 G2 Z7 z - ;--------------------------------------------------* e7 \* }; t; O
- Attributes_Data
3 t& w$ r4 \# `! P1 e/ e/ [% q - ;命名表属性
[5 R1 b) ~$ j# b& v - .DB $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00
# B: I, w" M; [* \+ o' F$ w - .DB $50,$50,$50,$50,$50,$50,$50,$50,$FF,$FF,$FF,$FF,$BB,$AA,$AA,$AA- A+ A) {9 u7 B9 g5 X1 ^" U
- .DB $0F,$0F,$0F,$0F,$0B,$0A,$0A,$0A,$AA,$AA,$AA,$AA,$AA,$AA,$AA,$AA2 s$ X0 ?# ~6 _. W& {
- .DB $AA,$AA,$AA,$AA,$AA,$AA,$AA,$55,$55,$55,$55,$55,$55,$55,$55,$55
! p' p/ _( w% X& v6 b( d2 Z - ;--------------------------------------------------
$ I: N& H2 E2 [& x+ E3 _# n - ;调色板数据
, }9 V' s0 m+ Q( z - Palette_Data, g" C5 J1 D2 S/ I) r; V
- .DB $0F,$27,$20,$0F,$0F,$24,$20,$0F,$0F,$21,$20,$0F,$0F,$25,$20,$0F
' f" i8 b$ ]9 [' K; [& X - .DB $0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F,$0F,$24,$20,$0F
( f8 m _2 V' m. X% j$ S/ x - : M) y0 d6 Q2 t' R6 X/ ~, d5 v
- ;==================================================" d9 G1 U, c1 K }. e3 D
- ;命名表初始化% B* h5 `1 J2 m/ \# ?' U* T
- Init_Name_Table% x8 C" Z0 ~- E$ z5 j6 b3 F
- LDA #$20( v6 l' K* r+ Y8 Q& u& I% ~
- STA PPU_ADDRESS* p- \; T! N) @" e' @6 D- R- l7 }
- LDA #$00
4 p- n$ F4 [3 ?2 s4 ] - STA PPU_ADDRESS
( ^2 _1 o7 v" Y9 [ - LDA #$00
w, P8 S, d. c0 v7 o( ? - LDY #$00 @ K% |2 |- Z5 T0 M( I
- LDX #$10
5 t9 h0 W2 `2 ^# ` J - Init_Name_Table_Write9 g W! d) K7 h
- STA PPU_DATA, p7 D6 p+ f' W$ Y% h
- INY4 D- e* g; Q6 ^! E& p1 t* M1 ]2 X
- BNE Init_Name_Table_Write; ?3 s9 Z1 w9 \4 v3 T- N/ t
- DEX
7 I8 f9 @4 ]3 H" j" \7 Z8 E! P' t - BNE Init_Name_Table_Write
( ~( W' E# g* s& N0 Y1 S9 P; J3 H6 _$ g+ S - RTS
$ Z: s' E1 A3 L. x+ t) }/ L/ V/ M - ?0 ~% H; K; U0 U/ c
- ;==================================================, L! K' U8 k( |# ]- B* W) d, Y
- ;调色板初始化4 p$ \, N+ z: V! W; X# G, q
- Init_Palette
) w. X( A4 t1 J - BIT PPU_STATUS2 L9 M( n; b4 E: T; ?: k( @, \
- LDA #$3F6 g" X" L! U$ H3 X/ S) u6 u
- STA PPU_ADDRESS
, s3 F3 Z9 ~8 Z# A9 O+ p' K' M - LDA #$00
8 [# Q/ d! P. e7 p, c# L - STA PPU_ADDRESS4 P) t/ }5 I3 Z, U( E/ m
- LDX #$00: f5 d' o, k: a) e# m& l- x
- Init_Palette_Write- g, Q, O3 K1 i. q8 e
- LDA Palette_Data,X
8 B0 m3 Z8 d1 a6 V1 R4 s: t - STA PPU_DATA
0 d5 N) f2 N' o5 c4 W' `: B - INX' i5 B1 {; j9 ]7 [( k8 A: j# J4 T
- CPX #$20
G0 k% t! m# H: m' G9 B- v - BCC Init_Palette_Write
+ C. n$ E R" Z* t5 ], T' F' v* t6 r - RTS
8 T$ I3 ~: D2 _0 |3 ~ -
8 |8 u( J* [+ }% d% z8 G! A - ;==================================================0 }& ]) R" x! R+ R* S( G0 x! k: n
- ;设置命名表属性: ~% X* j# V6 H3 h+ @4 Y
- Init_NameTable_Attributes& R0 e1 w3 r4 U* p! U6 b
- BIT PPU_STATUS6 w- E4 x% b) k& v7 {/ V0 C
- LDA #$23
$ x$ x" i/ M( `& r - STA PPU_ADDRESS7 |1 X" Z' s3 ?* F5 K
- LDA #$C0, I/ c8 I, ^2 v
- STA PPU_ADDRESS
1 v6 z" S! s/ I3 k - LDX #$00
* V9 F% o7 b7 a% E: I% f9 |. k3 X - Init_NameTable_Attributes_Write/ ]% ^7 e0 A& O8 o; K
- LDA Attributes_Data,X8 m( L1 `' {6 R4 x) e3 F' d
- STA PPU_DATA" r/ O, D6 n1 {
- INX* Z" T8 K, C5 q' z B
- CPX #$40
8 s/ C+ p1 v1 b3 _ - BCC Init_NameTable_Attributes_Write9 K( x$ Y9 e M C. z; U
- RTS* C: Z0 f) o/ H O
4 b6 i! F0 q, i- ;==================================================, S* q& U/ p, p2 L9 d/ [
- ;初始化命名表文本* y6 m. b8 j. ^& B* Z1 e
- Init_Name_Table_Text, I- {' f$ P A7 {" K6 ^* K/ \: Z
- BIT PPU_STATUS% @' C0 t9 z- t$ B7 j+ D. l
- LDA #$20- [& Q+ X& A$ h6 f7 b: {6 [) f2 R
- STA PPU_ADDRESS
( }/ o7 F- f# x0 \ - LDA #$00
1 z8 E; [, q( \, z! l4 S$ p - STA PPU_ADDRESS
4 h( w" T0 c5 ^6 {& @. \" a - LDA #$00
$ N: G& E8 y% F( Z - STA FC_Data_Buf
$ Q+ T, j8 O& Q& }& S( i$ n. Z - LDY #30; y- N8 P) l$ p9 l8 X
- Init_Name_Table_Text_Write
; o: c# d7 x( [0 s - LDX #32
9 m9 Q" y$ k! e" Y2 ?- T$ @ - Init_Name_Table_Text_Write_Char
/ F! t8 k0 {- _& y( Q% m, U3 _- s - LDA #'0'
$ E3 @8 v9 j$ P - CLC
& x- q( y4 B& E8 R4 { - ADC FC_Data_Buf
& v; R" a/ i) y- }/ e - STA PPU_DATA
) g$ o# ~( v6 H; z& b, { - DEX
( z/ y1 O* d; u+ V8 u$ A4 j - LDA #$14
6 B7 ~4 K, Z; D0 ~1 w: b - STA PPU_DATA' w* ]7 G5 x$ V
- DEX
9 t0 ~# x4 ?- z0 \ - BNE Init_Name_Table_Text_Write_Char
$ P. c+ T7 a# `9 B: k6 b - INC FC_Data_Buf: H, V( e2 L, i) x& ~8 F# U
- DEY
4 J# q' L! c P( v - BNE Init_Name_Table_Text_Write
3 J. E& j8 {% y3 Y# b - RTS4 r3 \; v3 L& ]) {( r
0 c; k/ a4 Q H7 m9 e$ W8 J4 K- ;==============================+ c( f$ f1 e; x% B
- Init_OAM_Ram;初始化精灵内存
/ \" c* z/ W- T8 [% Q# i - LDX #$00$ R; m! D4 o' Y5 ^+ r( h2 Y7 Q
- LDA #$00; o. M. L% d" R( Q2 l* Q; W; @
- STA PPU_OAM_ADDR( P$ j1 J' {- T
- LDA #$F8: c, A" C$ g' {, K# q3 u
- Init_OAM_Ram_Write
: W5 Q; I; {9 r$ s! [7 g - STA PPU_OAM_DATA
, G4 h Q A% J9 o; C - INX
) b) l( I9 K, ~9 V' b: Q/ J - BNE Init_OAM_Ram_Write
2 Q+ `& {5 f) r. a/ `5 O0 _ - RTS( ?1 L! h }: K
- ) R. C0 V* d( l& S) h- Q
- GamepadProcess;手柄处理6 Q3 W# e( Y) l8 u+ d
- JSR GamepadDatacan# a; `. r, l4 _/ S" V
- LDA <Gamepad_0_Value
2 ]4 s6 {1 e( _7 a/ v1 m, v - STA <Gamepad_0_State
~7 B4 ^; A h& l1 m! T8 b - LDA <Gamepad_1_Value
% s2 @" ^$ m6 a: y# c0 W - STA <Gamepad_1_State
7 ~+ M) |6 c' X6 F) M" n: A - JSR GamepadDatacan
6 q9 r L( r- E' Z! N - LDX #$01
1 g0 u1 m @9 h! R - GamepadMergeCheck;合并手柄输入检查# k3 L1 V0 K6 S) c# C: \0 E
- LDA <Gamepad_0_Value,X8 G+ R9 H( L, W3 e5 k& W
- CMP <Gamepad_0_State,X
% M) `0 ?' M1 o4 i- a! g - BEQ GamepadMergeInput. M; A5 X$ V! t
- LDA <Gamepad_Temp,X
; E8 b. k7 P3 l. F+ g9 ` - STA <Gamepad_0_Value,X
0 w l$ \1 m: d" D$ v0 k+ m - GamepadMergeInput;合并手柄输入& I2 B6 c2 d4 D- _+ L8 `2 ^/ V- A
- DEX6 X4 h" W, ~4 _7 z' N! P
- BPL GamepadMergeCheck6 o7 i$ \( x% p
- LDA <Gamepad_Merge9 }0 ~: G. z O9 E
- AND #GAMEPAD_MERGE_FLAG
) j0 i) u( l2 b2 U6 x2 Y! ?1 { - BNE GamepadStateProcess
! {, P# a6 E% ?# ~4 g! _5 w - LDA <Gamepad_0_Value e/ V8 V7 G' ?$ C
- ORA <Gamepad_1_Value
0 S" Q) ~/ ^( E: p/ T - STA <Gamepad_0_Value: z- }) |* j# v% S) x
- GamepadStateProcess;手柄状态处理9 j/ h3 ~6 Q' [( m8 f7 y0 [# V4 Z7 i
- LDX #$01
8 ~/ L3 k' G9 w - GamepadStateSave;手柄状态保存
/ L: r6 f# T" A" c. G - LDA <Gamepad_0_Value,X
^7 a3 K7 m F/ g+ ~; l1 A- F - TAY7 e! L. o- N8 X' \
- EOR <Gamepad_Temp,X' l0 i6 ?+ R$ r5 t% Y1 ^% A
- AND <Gamepad_0_Value,X) _3 C/ Z. \ T* F2 m9 e
- STA <Gamepad_Once,X" g: w1 g9 s$ G8 _2 Q1 ^
- STY <Gamepad_Keep,X
* Y2 K) c9 b0 d! \/ v( K - STY <Gamepad_Temp,X" N! n, o0 L7 ?- D1 ^! n8 p
- DEX
- V0 X- S+ ]/ J" J7 l% [$ K' t - BPL GamepadStateSave% {! V, i) h( o! B# n. R
- RTS* }9 ]* K) @5 X
0 _# G# O# w0 |& C- M- GamepadDatacan;手柄数据扫描
9 t! J& u( B) ^+ S - LDX #$01) l. U- `; X5 Y
- STX $4016
8 `) g. I3 z8 r" c - DEX
* g# \9 p. c! D6 W - STX $4016' C% D. Y2 @, q
- LDY #$08
7 Y; R- x0 `' {. k0 R+ I - GamepadPortScan;手柄端口扫描
" J* o( M; x" Z1 ?2 C- \6 H7 k - LDA $40163 h7 t5 Y% G2 s Z. }0 M
- STA <Gamepad_Port_Value2 v8 F# G( [* ~( U/ i; Q x
- LSR A$ k0 Z6 r F! v5 M
- ORA <Gamepad_Port_Value
. g5 t4 F, i$ f7 Q! [7 b2 u - LSR A( `" \6 X' E: L9 Y, p% t9 y+ ]
- ROL <Gamepad_0_Value! S/ H! T1 W) P, ~7 Q& J
- LDA $4017
[) `6 {) m' e/ G - STA <Gamepad_Port_Value
# D" N" ?4 _& g/ [: F4 p4 I - LSR A
6 \/ \: [5 l# `. ^9 G. Q - ORA <Gamepad_Port_Value" j- N0 C' Y" e9 B1 w. w
- LSR A) L/ N' a; y: K* x* c' c! t. u
- ROL <Gamepad_1_Value
9 b" u5 @. V, h! m. g - DEY' z* y# I! O6 k. X5 I5 |# F# }6 v
- BNE GamepadPortScan
! m! E- p) n) c$ ^! h' H - RTS) H1 p$ C7 h; J3 S( m. ]
- % ` i* _7 \* u
- ;==================================================! {3 O2 d9 K9 R& X
- ;PPU处理
' f% t4 e8 L. M0 F" r k - PPU_Process( ^4 a; J% M& a$ r5 s, _/ g# Y
- LDA #$00
- `: d1 K# ]) E7 K3 V, i - STA PPU_MASK
* x6 P+ F1 n7 X - 3 w% t x3 M! T! j
- BIT PPU_STATUS
c: L! F& A- B; ?$ w( H' _# _ - LDA #$20# M2 s+ {' ?" p' N3 l8 J% M
- STA PPU_ADDRESS9 l) x/ a3 h7 ~& @
- LDA #$00
- y( k1 ~: Y6 b7 z$ x$ U - STA PPU_ADDRESS
, c V8 ]/ x4 s' ~0 ?% i" G$ V - 3 ~3 ~0 y4 J" R6 U# `; |4 E7 z
- STA PPU_SCROLL
& M& w( C# y6 ~2 I - STA PPU_SCROLL: i7 x9 w# w( n; J+ A+ }# }
- 4 H& H- [* ]4 B8 b
- LDA PPU_Msak_Buf
) c' U+ B6 J. T9 x5 n1 A& |, N2 g - STA PPU_MASK0 e# E9 m+ I5 X2 @1 y3 P; G4 C( C
- 4 ]+ }8 I" z7 ]- t
- RTS
/ o+ F7 C" X9 o$ y - . R7 m6 |6 E/ W/ N
- ;==============================& x, j( {: ]% x: M. \
- Time_For_Vblank;延时等待2 f" E3 ^: k+ M8 C- Z
- LDA PPU_STATUS
s) _2 X5 Q: E( X" Q+ r7 h - BPL Time_For_Vblank2 m& p$ g7 s: L7 K; V. X
- RTS4 A* {5 S, B5 r7 H
- ; G6 R1 V2 g7 I0 M
- ;==================================================
' D, u1 N* ]; i/ t, `3 {3 }& m - ;初始化MMC3% J3 K4 Z* B6 T! h8 W |' b7 E
- Init_MMC3' v( ^ L2 G2 O% F( N; S1 Z; W
- STA MMC3_IRQ_DISABLE
; Q; h! F+ O8 l7 V- R2 \ - 2 G# d, z. i; x8 r
- ;设置MMC3水平镜像7 i! w% W; A/ P3 E! C; w0 ?
- LDA #$01
% u# L. N9 U" T4 F1 ]& O7 { - STA MMC3_MIRRORING- `+ C: q) t a# _* C
- 6 Y# | j6 z. z) d4 ?
- LDX #$05' v8 ]/ A& z1 f5 g' J
- Init_MMC3_Chr_Bank_Write. S0 I' A V1 r* h& x. Z0 l
- STX MMC3_BANK_CTRL
0 v& Y2 V$ i! ] - LDA MMC3_Chr_Bank_Data,X' J6 ?; }' T: a/ a( ?, c
- STA MMC3_BANK_DATA. P% J7 _1 @; T$ V
- DEX
- t& }+ R- B! n! V - BPL Init_MMC3_Chr_Bank_Write
/ @3 ~$ A* y6 r; J( M% } P8 `$ [% h - RTS$ r b' w/ n7 X1 ]
- ;--------------------------------------------------
6 _# e7 k s8 l. _. b - MMC3_Chr_Bank_Data; a! h; c) q( \- B& }
- .DB $00,$02,$04,$05,$06,$07$ D8 h! N! _/ |/ v' R
- 4 i2 R: A& {$ n( d
- ;==================================================" l8 b. d+ {6 ~. K+ V" v
- ;重置中断处理" `2 V! p2 m$ u& N
- ResetProgram. [( {$ j: z% P4 ^4 i
- SEI1 S& i/ a4 z1 M/ m @
- CLD
* Q! _9 A, s1 x, @2 X - LDA #$00
# C( l, P7 h( n. t& P. H* Q - STA PPU_CTRL# ]: c$ l& T/ A4 M. d/ f( H
- STA PPU_MASK! P" l$ z" G2 \3 i/ F
- STA PPU_STATUS$ [0 W, G9 H2 U0 j- @+ N
- STA JOY2_FRAME
- A; f- h5 h$ O1 ? - STA APU_STATUS
! a! {$ a* u5 I: }7 a' Z -
/ F) R8 y7 E: ]6 m3 t6 b+ i1 b8 j - LDA #$C0
5 d6 \- _8 c2 }5 x! e - STA JOY2_FRAME
L7 D- J0 a1 ?* [2 ], Y -
( I8 x7 \* W5 a U) y - ;等待vblank
+ _7 C' Y* Z1 k. @" ] - LDX #$02' V! |& B, F4 o8 Y
- Vblank_Wait_1
- m7 F# [* F0 z* R4 l! z3 S - BIT PPU_STATUS t0 g: A1 |3 f
- BPL Vblank_Wait_1
, M/ P+ r& ^4 k, [( B0 ^; P! Y - Vblank_Wait_2
. u) N7 h3 W; n6 U9 q - BIT PPU_STATUS, l+ h/ f9 A4 [
- BMI Vblank_Wait_23 ] d# K4 ]5 Y9 L7 n W
- DEX
. p, ~) ~8 n7 c2 }3 y; ?* B; M - BNE Vblank_Wait_1) S/ Q7 S' }' q+ o
-
4 J* w4 e+ e$ k) g+ b) c5 q - LDX #$FF
& k/ J8 H, \/ D - TXS
0 y3 V; k: z7 o7 e# Z3 O8 }: I - ; i7 N, O: X5 e9 p! M" }
- ;初始化MMC3
! Q Z4 G/ Z4 h4 F - JSR Init_MMC3 B! B) h) ]1 q" @. P$ \
-
3 f! a- K' ~. _. @ - ;==============================
- B v, l, C' `0 y2 b6 _8 l, t - ;RAM初始化
7 {% L: {* g! O/ m' R: i% ^8 T - Nes_Ram_Init O& z6 p6 @- e" P6 c: `( J
- LDY #$00
' M: M, O, m3 X8 Y/ ~2 k - LDX #$08% ~, H% ~- s! N# T5 |2 x
- LDA #$00
% W+ r6 w5 a% f" Z8 k - STA <$00
1 D0 ?7 G h* T. ^0 A9 x# K* x" q - STA <$01
! q6 X& ?0 e7 { - Nes_Ram_Init_Write
4 V' t) u0 f* F( h - STA [$00],Y9 f0 W$ r+ U2 s1 Z
- INY
7 A8 ]9 V, N/ m* u! u4 [ B, _ - BNE Nes_Ram_Init_Write
; H% E) { I8 P( {7 ] - INC <$01" a* }, G' e1 N. D3 j) b
- DEX& G/ e# {0 r3 O/ {# p/ v; P4 v# t
- BNE Nes_Ram_Init_Write [1 o: B4 ?! ^' T, _& U
-
4 I# d: c! |, h+ \' v. r7 I - ;初始化命名表
- _$ m0 X i G' `1 m6 L - JSR Init_Name_Table
+ T# V2 K. y8 k M/ @7 I# H: f -
' J7 O2 h9 }$ v, \) a: N' n3 B1 Q - ;初始化调色板( i% {4 f/ s' ]
- JSR Init_Palette$ |. t2 ~) p( t: U
- ( ^1 a5 f- x6 e4 k/ `* `1 M
- ;初始化命名表属性
7 L$ H! {$ a/ c* \: L7 \ - JSR Init_NameTable_Attributes
: p4 q1 l J+ u' c, A - ( I) {, u ^; u8 u6 ]; c% P$ ?: R8 t
- ;初始化精灵内存1 `0 k$ o. b6 i- _
- JSR Init_OAM_Ram; O4 X0 o3 i0 j" ]) ^' P8 Q
-
( E$ @# @/ w" o4 B/ U - ;在屏幕上写点东西
0 X# X/ a! E! D: K# m2 R - JSR Init_Name_Table_Text
1 [* f% V3 S2 M+ h, ~4 ]+ n -
9 e6 P- g3 T% i3 n) B - JSR Time_For_Vblank
g& y. D6 L+ ? - ;开启PPU控制1 r# S" L5 o y7 M* [9 n) k
- LDA #$A8, ~+ j- B0 o8 C6 k5 U$ f
- STA PPU_Ctrl_Buf
$ _4 G2 G' \# n& ] - STA PPU_CTRL
9 k. d# f* [8 c/ m3 x) ~3 X: C0 b -
& x: x; Q5 t8 ?& q+ p - ;开启PPU显示) q, E! E; s8 m6 Z1 T" q: A
- LDA #$1E* _7 _5 `/ B2 e
- STA PPU_Msak_Buf& _* K+ N9 p; V9 I) V
- & I- t0 [% U% a# z
- CLI6 @$ M8 P2 {" S7 o7 U
- JMP Loop
$ i E: l# M1 ~2 O0 N - B9 E) W/ y5 J i
- ;==============================2 s+ e1 p! k% p5 M& Z# Z: r9 O
- ;死循环, 等待NMI中断
! o1 Z( ] m' A; M' K - Loop, y; d# U! y3 \2 i3 X/ l! ~
- JMP Loop' T5 f/ i+ {. z% N; K
2 A" g" g% |, O4 p* q5 D4 s- ;==================================================! h/ ^- ^# |3 g( g! S7 m6 V
- ;NMI中断处理8 H% u! a' e; u7 z, R
- NmiProgram5 Y# _+ z; }* s7 P! F+ Z9 v3 |
- PHA% N9 q5 }- a8 Q8 r. c% B, P3 v" C) }
- TXA! o) w3 J4 f3 w- b8 d% v4 P
- PHA7 V) S# O. Y4 N/ Z9 A
- TYA
% Q3 m! r7 k" U; u - PHA
0 \3 j. b' y W1 s* m; s -
8 z- k7 @( w' `7 c4 C9 q$ F* x - BIT PPU_STATUS ~& j6 p2 ?: j2 e* p- Z# P
- / j. S9 O o8 P$ Y# {6 J X
- ;关闭PPU控制9 i; Y) f7 e8 \* X2 e" k8 }
- LDA #$00
. F0 e0 g7 N) n: e' y0 g - STA PPU_CTRL) z$ u, z3 |8 [
-
" V( A y' `* ?" Z - ;处理PPU
8 A" u8 P6 g( O$ V4 B, s' Q - JSR PPU_Process
' J% k* I5 Q* T3 r) I9 ?9 c; C -
) F* b1 W, S: Q0 b. q: P! z% R - ;开启PPU控制
7 L$ p) l+ H6 t' [ - LDA PPU_Ctrl_Buf1 K5 Z, v: b, P
- STA PPU_CTRL
3 d( j+ g; ]5 D ?" f" ^6 D -
7 }4 p9 P7 u! S. A1 ^( K' C - ;手柄处理 G4 B* k* @/ G: ~( \8 O
- JSR GamepadProcess. i2 m4 ]6 s4 \ J1 O0 ~3 g$ l
-
9 [1 v/ z: P3 i8 r7 G - LDA #$009 C Q+ a* [" Q/ k5 D
- STA IRQ_Index2 d/ D3 D) R$ c G! M- J
-
2 _9 Q# I7 D! j* z) C2 O - ;启动IRQ中断, 第15条扫描线触发( U' A7 t9 l) `" A+ ?5 C4 z
- LDA #15 + 1
+ N% K; b* w2 H2 J- Y9 n - STA MMC3_IRQ_LATCH
( u; y# T3 L8 p$ r. L3 {, B - STA MMC3_IRQ_RELOAD
! r4 d: n' h: D. U5 Q+ S - STA MMC3_IRQ_ENABLE4 v+ B6 l Q7 _, k5 `' G( Y
- CLI
2 c1 I* s& ]) }5 g' \# O1 l3 v - r. I0 a6 a7 Q2 Y/ ?/ ?
- PLA) w' D" _$ U+ }
- TAY( i# s6 y6 E. q5 A
- PLA/ \( E( X2 e: U" d2 y& f
- TAX
$ d8 t1 S+ ~% M; o6 D - PLA: z: c' _' R2 i* [
- RTI) ]8 r; \: E* j, X4 |! S
) t. o& |! W: H1 C1 T$ b$ k3 d- ;==================================================7 {2 ^5 z% J0 G# @
- ;IRQ中断处理
. G& s- b' |) u - IrqProgram% L, p# O) P% S+ M) n
- PHA
; R$ n0 @ _ b$ `0 L - TXA. t8 R6 F- e1 g* R7 ~
- PHA, `! @- u8 Z$ ]
- TYA6 T& u1 Y, F* U: X& s' T
- PHA
1 j" X5 w+ ]- v! f) ], E4 v - ! h, a& t x) t% G" b2 @
- ;关闭IRQ9 N% [; q+ ]3 x7 h$ c- S
- STA MMC3_IRQ_DISABLE
7 s o- M$ y* Z7 n - 9 R5 z( B5 B0 z0 G
- ;允许下个IRQ触发
" w# v5 F6 t- Z) u& W+ r - STA MMC3_IRQ_ENABLE" I5 E& Q3 L- u4 P. b; ?$ C4 z
-
/ Y- V( o h. X' ]: B& x5 q - ;IRQ处理, 15线后继续触发1 i0 s: E/ e" n o. P% _
- LDA #15
5 d `7 M) c+ r- C6 R9 k: k) M - STA MMC3_IRQ_LATCH
3 H' E4 l. K& h4 J8 z* E -
7 |& ^' C+ ^, r; e$ ~ b - LDA <IRQ_Index ~; G) C# H- ^4 D5 u. y4 }
- BNE * + 4. z0 `$ p/ L0 M9 P0 X+ ]6 y& v
- INC <PPU_Scroll_H
8 e. s: `& U/ ^. N$ z! P -
- B! j$ L/ A2 n4 v. S. D5 E Q) R! l - ;设置屏幕滚动 x" m" `5 @* k, h
- LDA <IRQ_Index
/ [4 M$ f& v* x" ] - AND #$017 V! v% W7 [% @. J! B9 c
- BEQ Irq_Scroll_Right* J* w7 A5 S- q/ s6 M8 U
- 9 k1 X; m$ D3 G! T+ v! h% B9 }* a: T
- Irq_Scroll_Left
4 x/ ` m; `3 _3 i: E - BIT PPU_STATUS
8 V7 [2 v, j2 L2 V" M" M - LDA <PPU_Scroll_H* z* w1 Z4 O1 a$ Q+ Z
- STA PPU_SCROLL
& r: P7 V/ Y) T2 |1 K- C4 r& G' D2 i - STA PPU_SCROLL8 S$ L" r2 r- t, p' k; s! m- U
- JMP Irq_Scroll_Over, i" C9 \3 t! T7 F& N+ {
- 7 A- I5 \. ^/ s$ C1 }7 {
- Irq_Scroll_Right
6 Z& q8 _( }& {( T - SEC( T" K) F7 K& G3 J$ Y2 y
- SBC <PPU_Scroll_H
% B$ s8 i8 K: v( p; G' L - STA PPU_SCROLL
8 x U3 E$ C0 r; f - STA PPU_SCROLL
6 Z# C! v# n( A- |9 w5 W - Irq_Scroll_Over" {! K" o2 @9 o+ g/ n
-
! Q- r4 ^7 k$ P1 Z k - INC <IRQ_Index6 w( {; n* K! B9 w3 q
-
, @/ t F) }$ Z: L - LDA <IRQ_Index
' E8 w5 X" N4 y8 ` - CMP #148 S1 h; U+ r9 L$ s$ O) A
- BCC * + 54 K6 v x8 |' K7 Q9 q. g( C, r
- ;关闭IRQ
; {4 E o9 Y. e5 M7 W3 L, c2 M - STA MMC3_IRQ_DISABLE; ~! W" E# ?* J! b) O; L* ]
-
7 \" E! x1 N2 ? - IrqProgramEnd
+ h% h8 b+ ?: F) r) j0 _" E - PLA! w7 }% j" F. x
- TAY j/ @" \8 T0 L) [2 t7 V
- PLA8 ^& P- ^2 g- }7 f$ [1 B9 m
- TAX5 m# I2 @4 V7 E
- PLA
' {' o1 c* N. U* G5 M# M - RTI
: K7 I3 C% {, d8 _/ [" f9 @ -
3 I, i4 X3 }0 p8 h4 S1 h r" G - ;==================================================+ S6 x$ p/ ^8 c& l8 e) g$ M
- ;中断表
6 m# `' e# l: P x - .ORG $FFFA
1 m2 J) [& M# c6 s* e - .WORD NmiProgram
$ N& A- t6 _/ a - .WORD ResetProgram) ]) b# c- J$ T3 U8 \0 U: O0 M9 f
- .WORD IrqProgram
复制代码 [/code]
3 g: L2 V, K1 A) W |
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