[FC][最终任务转mapper4程序]

yandagui

;[FC][最终任务mapper1切页程序]
$ Q, E9 J: S* K& i .ORG $CD9B
BANK_START:
5 ~0 F# ~; l+ b STA $70
TXA
3 X3 a. l5 _; P9 I+ Q ASL
TAX
9 r" P# _- w1 s+ kPORT_SET:
LDA BANK_DATA,X
$ }* Y& H  ]; P- Z; u STA $6E
8 n8 g5 K+ w' n1 ]5 i' s LDA $CDB8,X
' M7 Z& b/ X1 G STA $6F
LDY #$00
LDX #$05
) w2 C! m# u" v0 b LDA $70
) y4 }5 \' F- N# W6 fPORT_WRITE:
STA ($6E),Y
LSR
DEX
( m& k5 Y: N* W BNE PORT_WRITE
RTS
. O% a3 w4 Y6 \$ C

BANK_DATA:
; c) e1 [6 m2 x3 d .BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF
# p1 R0 G8 Z$ v2 Y: M

  l, O9 b: d! z: {6 i;[FC][最终任务mapper1转mapper4切页程序]
& H- s! p) d5 X .ORG $BFD2   ;初始化跳转
+ B; t2 _2 ?* N JSR $FFC0


.ORG $FFC0    ;切页
LDA #$06
STA $8000
LDA #$0E
( V: S8 N  M+ C7 E3 R STA $8001
3 x7 g0 H$ m  Y; }3 l& ~" x JSR $8000
, ?' S  R) F9 j- c RTS

: I, x9 F- c$ J( O$ I5 R  A2 q( y .ORG $8000    ;数据复制
LDA #$80
STA $A001    ;启用SRAM
PHA
! s' [+ G1 ^+ g, |9 R  @: F TXA
5 J1 o2 n% j# e# d% i" h  f PHA
LDX #$00
7 U' p9 I" t, k, [DATACOPY:     ;数据复制
LDA $8100,X
STA $7200,X
INX
CPX #$00
; l# j( S$ x& o BNE DATACOPY
3 A) C9 P* `! v# C5 l PLA
TAX
PLA
RTS

.ORG $CD9B    ;跳转到转换的切页程序
STA $70
JSR $7200
, ]% }' l" }7 B) m RTS
, D5 W0 |( n3 [5 y( B( ?# Z& E" a
: d7 S! Q% N$ i# u  .ORG $7300
0 O5 j) S0 l* X# H" HM1_TO_M4:    ;切页程序
CPX #$00
BEQ REG_SET
CPX #$01
- Z2 u& s$ U  ^( s BEQ PPU_BANK_0000
CPX #$02
BEQ PPU_BANK_1000
CPX #$03
BEQ PRG_BANK
REG_SET:
% v9 |8 q9 I3 q9 ~0 V4 m7 g STA $A000
( f0 t! D, w2 D2 d( g$ M RTS
  .ORG $7320
PRG_BANK:    ;PRG切页
6 j7 m! N( e. y- Q- ^/ P  P+ S4 E PHA
LDA #$06
STA $8000
: @8 n0 c6 P; G; i8 R PLA
ASL
STA $8001
0 m; \/ d: d; l0 s+ s5 l2 ^ ORA #$01
PHA
LDA #$07
STA $8000
PLA
1 ]$ K3 S# r+ e% A1 M% ?( V2 x  ^ STA $8001
6 s9 x& b. Y- l/ {  K RTS
3 m8 m$ g! U6 e$ f$ o8 D9 h$ T .ORG $7340
8 ]1 i% Z  S( I5 Q6 M% LPPU_BANK_0000:    ;精灵切页
PHA
- ]3 s9 x+ O6 V; a, s* O& o ASL
4 C" \1 F1 r/ U0 L ASL
PHA
LDA #$00
STA $8000
PLA
. C, l, E1 s3 v( L STA $8001
ADC #$02
PHA
LDA #$01
STA $8000
PLA
0 Y  S& M$ {) t0 M+ C" Y' S0 N STA $8001
PLA
* C4 e! z* W1 Q; W% @ RTS

- C) c* L" o$ F  .ORG $7360
PPU_BANK_1000:    ;背景切页
7 q# r, R1 D: x PHA
# a9 [( p# z( ]3 Y) d3 ?. }. K ASL
# \* M7 f3 E3 G' Y( J: G. l# u ASL
PHA
LDA #$02
STA $8000
PLA
STA $8001
5 p' O4 o3 o6 u7 D. v+ h8 y ADC #$01
! W1 U3 T8 Q9 b: H" z$ [" `* H PHA
LDA #$03
STA $8000
PLA
STA $8001
ADC #$01
& B; g" o$ \) C" [& J PHA
LDA #$04
$ C2 k+ s3 q' a/ Z2 z* o6 U  [8 v* e STA $8000
PLA
STA $8001
ADC #$01
PHA
LDA #$05
STA $8000
PLA
- g2 G7 p8 _, f2 X2 w STA $8001
PLA
RTS
1 E/ ]8 w2 C: M4 Q. \8 B3 Q2 }

游客，如果您要查看本帖隐藏内容请回复

liujunbtx

完全看不懂啊、、、、

来了来

看一下是什么。

afti

感谢楼主分享！

shilinnnn

谢谢。。。。。。。。。。。。。。。。。。

ey136

学一下rom扩容的方法，谢谢

huashao1268

看天书啊。。。