[FC][最终任务转mapper4程序]

yandagui

;[FC][最终任务mapper1切页程序]
.ORG $CD9B
BANK_START:
, r9 A) P& n$ S/ Q. S6 Y  p3 ] STA $70
TXA
ASL
( b2 h5 h8 C( R7 U5 b TAX
PORT_SET:
LDA BANK_DATA,X
STA $6E
! ~  z* j$ e/ k3 q LDA $CDB8,X
4 C3 _& m3 o1 B. R STA $6F
LDY #$00
$ a$ l$ I+ w% N6 t) ]8 x LDX #$05
0 K  X; N# H0 o, C, t LDA $70
) |- a* b& ?/ |; I$ bPORT_WRITE:
STA ($6E),Y
: C( O! y" T- p3 j+ s LSR
DEX
$ F: o- W8 g+ |2 h/ k1 I0 s* G BNE PORT_WRITE
$ h1 p: i2 K* k" f# W8 g, m" D0 q( R RTS
+ M/ B; h6 n3 S$ Z1 K+ C) o- f5 L% Y
$ F. ]3 D! t# |' W
" n! c( c8 {2 yBANK_DATA:
.BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF
+ f* }- k- F& ]/ H
% z7 h' [1 ?, ~9 Z) l+ \  [$ |/ r* T
;[FC][最终任务mapper1转mapper4切页程序]
.ORG $BFD2   ;初始化跳转
: y/ y/ k: n& |* t6 { JSR $FFC0
# N1 C4 A7 o# v4 }# k5 ?8 z2 h. y: y
/ b5 o- n) H. V. K
' i' W( T3 _3 L .ORG $FFC0    ;切页
LDA #$06
9 X# E( L9 \* m7 I0 [8 R STA $8000
# t6 a' `; s( j LDA #$0E
STA $8001
JSR $8000
RTS
! s7 y4 t* ?1 A7 A/ Y
.ORG $8000    ;数据复制
LDA #$80
STA $A001    ;启用SRAM
8 f$ Z8 u3 u9 u1 H0 A PHA
TXA
# r% v+ d/ e! R" |/ M PHA
% n5 ?8 S8 b! O) p- x# `) Y& F( N LDX #$00
DATACOPY:     ;数据复制
% N# {- |7 N( G4 t. ?6 Y7 c& H0 ^ LDA $8100,X
STA $7200,X
" R5 a) \- U; {9 g" ~( S- C INX
( D9 |/ N( I# X: P& s/ M7 }1 R/ [, I CPX #$00
BNE DATACOPY
3 Q* y. L# @# u* \ PLA
TAX
PLA
3 X5 b1 v* \7 }8 H3 q RTS
  T3 _; Z, b7 h- v6 E
6 Y+ P9 {4 P* d/ d; ?$ N! G .ORG $CD9B    ;跳转到转换的切页程序
STA $70
JSR $7200
5 S% a6 w  ~0 j) U4 s RTS

  .ORG $7300
( k. C- {  s) G  P7 A) ?$ h+ @; rM1_TO_M4:    ;切页程序
CPX #$00
# `' v: C) ]7 K BEQ REG_SET
8 e3 L1 m& {7 m& o2 X6 t CPX #$01
BEQ PPU_BANK_0000
CPX #$02
BEQ PPU_BANK_1000
3 d' J' J) g3 y2 R9 r8 g+ u1 x5 I CPX #$03
8 _5 r+ `; ~* T7 U6 w BEQ PRG_BANK
REG_SET:
4 @6 s1 C5 K. V7 d' \5 F STA $A000
RTS
& o0 s/ z5 X9 i1 ?; k- p/ ]  .ORG $7320
& C& g- Z6 `  R( O: i8 |( M/ iPRG_BANK:    ;PRG切页
PHA
LDA #$06
$ \  D% D) j- g) j0 L+ t STA $8000
PLA
ASL
2 j! y8 C9 n) a( _ STA $8001
- a/ |, R8 _" B% Z- w1 t ORA #$01
PHA
, b' R( Y1 W1 J! l& e  s LDA #$07
STA $8000
PLA
STA $8001
, g$ \4 F; p" i8 h1 P: U; J RTS
1 T) }8 N; g9 |! R  Q+ \% C .ORG $7340
+ B9 D$ I- P4 H5 T- JPPU_BANK_0000:    ;精灵切页
, t3 \" B6 E  Z4 ]# `$ ^8 M4 D/ l" X$ a PHA
ASL
ASL
1 a+ m, a0 _; Z# Q) F$ D( Q( K PHA
, e  w5 f7 Q# E LDA #$00
STA $8000
PLA
0 W4 R$ O2 O) `5 F! p# o STA $8001
: R- |  Y9 ^9 U4 N$ P  b% n ADC #$02
PHA
3 _" e9 p5 G; f, S1 Y: Z% B$ \: M LDA #$01
" K2 L9 L3 X7 ? STA $8000
PLA
STA $8001
PLA
RTS

- h$ O4 I( O% U- P  .ORG $7360
PPU_BANK_1000:    ;背景切页
PHA
ASL
% ?' r8 W  h: b0 T8 c- F+ h ASL
, s0 U4 e! a9 J( J# v" v PHA
LDA #$02
! K$ K" M4 O6 A6 C& b7 U STA $8000
5 W1 {; `( U7 z$ y PLA
6 N, m6 P; \1 j$ }1 M- j STA $8001
: u) v; ?9 m# s8 A( X ADC #$01
PHA
LDA #$03
STA $8000
PLA
5 d, K) F, t$ @ STA $8001
ADC #$01
PHA
LDA #$04
STA $8000
PLA
7 ~. B, ]% i- U& s! Q STA $8001
8 E, E* ]" m3 ~  ]8 a$ ` ADC #$01
PHA
LDA #$05
" s" G- L7 [: Q8 I STA $8000
PLA
& c2 U: H2 \# r3 ?; P9 Z0 n4 B* D% V STA $8001
# z8 ~) H2 R0 Z" ^& f+ ?6 n. s: K1 B PLA
' A0 `* B& Z6 \/ H/ J+ {0 S RTS

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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。。。