[FC][最终任务转mapper4程序]

yandagui

;[FC][最终任务mapper1切页程序]
.ORG $CD9B
BANK_START:
STA $70
8 i% s2 k4 K1 F7 v7 K7 z6 z TXA
; _2 S9 R8 d" A ASL
2 K9 g: m7 e( e2 {6 i. d; M TAX
+ O/ K4 o5 q5 wPORT_SET:
LDA BANK_DATA,X
" N+ I# f6 }( q* R: P STA $6E
LDA $CDB8,X
STA $6F
' t* ]* |" ~" W( a% X LDY #$00
; d1 w4 k( P5 P+ Q LDX #$05
LDA $70
7 n0 }8 x8 j) @, a- w5 g3 e0 aPORT_WRITE:
STA ($6E),Y
LSR
: B1 D; h+ W/ |6 B  d, f DEX
BNE PORT_WRITE
RTS
. A: _: S6 t8 a. Z. Y

! i& ~7 I9 O( [2 I9 Y" n$ ABANK_DATA:
.BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF

, U- o6 R2 p. O
0 F# c( L4 K% G* K2 M3 ~+ x;[FC][最终任务mapper1转mapper4切页程序]
.ORG $BFD2   ;初始化跳转
9 r; ~: e6 x3 J' ~/ h* S JSR $FFC0


% y0 ], P: U, O$ b* U/ d' U. _ .ORG $FFC0    ;切页
* M" V# h2 Z! D8 u7 A" G LDA #$06
! M/ k5 ]& R$ i STA $8000
/ ~8 W; _, c& G9 L- L LDA #$0E
/ N. S* V- m0 n! V% y6 V STA $8001
JSR $8000
RTS
. ^" ~& [- ?& \# ]! x5 a6 m  B
! N: o5 U" g: Y4 X2 O8 x .ORG $8000    ;数据复制
. x. C9 J* x; H  A1 q LDA #$80
STA $A001    ;启用SRAM
PHA
TXA
PHA
0 m* {% R( w$ P9 F5 w: d LDX #$00
DATACOPY:     ;数据复制
5 _& i: E- M$ J! }5 O% H6 j LDA $8100,X
STA $7200,X
7 e6 P' l$ b- N2 Q, x5 z) j1 K0 W; Y INX
CPX #$00
* |5 Z$ X, K5 y* |" s8 P0 W4 \ BNE DATACOPY
$ G( ]3 N# V0 L' c" f+ ? PLA
5 }, r' h1 Z  u% [/ q* i: T TAX
1 T( m* V2 l$ `3 `3 C PLA
) i( {" d5 Z# a2 v" r RTS
+ [% a* d- j# ~/ C+ K, s
) U% u- U2 B" [" {/ D; e .ORG $CD9B    ;跳转到转换的切页程序
STA $70
JSR $7200
" A/ Z% N) B7 s& v1 } RTS

# T4 n% u' M. J& G8 {, o  .ORG $7300
M1_TO_M4:    ;切页程序
CPX #$00
0 T# s4 n4 U: ]& W/ @2 k9 ^# p BEQ REG_SET
7 J* I* d! }' s& P' o9 O CPX #$01
* w" S% H8 Q5 F" {% N; j4 t& a BEQ PPU_BANK_0000
4 D* I0 o: w& {6 B% e CPX #$02
( G: I( H$ s! r, M BEQ PPU_BANK_1000
CPX #$03
% Z2 {- v* n% `4 E+ _ BEQ PRG_BANK
REG_SET:
2 L: o. G  J/ c" H8 y% I STA $A000
RTS
  .ORG $7320
PRG_BANK:    ;PRG切页
1 ^9 m  `: `/ c) @& `) [ PHA
LDA #$06
' n5 d" p( w  k& \  z STA $8000
# }( R- t' b0 F6 @+ O5 u4 [ PLA
ASL
5 ~3 v1 `, k) |" \7 Z2 H# ] STA $8001
ORA #$01
PHA
LDA #$07
9 Y1 P9 k% q( r: X STA $8000
PLA
/ Z3 c6 E8 w% `+ K2 E8 x1 i STA $8001
8 f  y- h6 H! s9 i RTS
9 q* U9 \* Y/ E3 ` .ORG $7340
PPU_BANK_0000:    ;精灵切页
PHA
' u& \/ ]/ M8 G+ w ASL
ASL
PHA
  |2 \2 O+ t' t8 H- E; N LDA #$00
STA $8000
; l( ]+ f: W3 P4 X! f/ B PLA
3 O9 x+ U% M* l& q7 J' z STA $8001
ADC #$02
PHA
- L& j4 i, h- y, W LDA #$01
STA $8000
9 D1 p* n" H  R PLA
STA $8001
PLA
RTS

! ]3 i( n* F! M0 g* U+ O  .ORG $7360
PPU_BANK_1000:    ;背景切页
# x0 D" A5 j1 e: R" B  z6 R3 b PHA
9 D& b, `$ ]/ ~+ M ASL
ASL
* t9 K( v6 K9 t8 H9 H- A4 k PHA
9 c4 ~) o7 o5 c* w* y LDA #$02
, C! K6 V& |5 u STA $8000
PLA
STA $8001
% c( _( S: a" p" v ADC #$01
5 l3 k4 X- V3 N  a- D! P PHA
+ j" y/ M* H" Q$ K2 S. J& g) f LDA #$03
STA $8000
! ]: o8 Z) U/ {' x) z! t PLA
STA $8001
( g, z1 F1 a- @& ~6 C& v$ d ADC #$01
; R$ B1 T  M  R9 Q% g PHA
LDA #$04
/ c9 M$ M: i; Y; Z$ x$ f! l1 A STA $8000
+ z8 b1 g2 X9 y' t PLA
STA $8001
5 l$ v  G9 o; h. V4 P: o5 `9 G: c ADC #$01
# e# y. M& c. T5 m+ h+ i- a PHA
LDA #$05
STA $8000
PLA
! J- e8 p/ E" F STA $8001
, J  t, f7 X: I9 P' @2 _9 n PLA
! M+ d( x, }$ a) J% R( ? RTS
* n6 Z( S- @' T3 ~
: ]8 C9 M# p; i' i- V

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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。。。