[FC][最终任务转mapper4程序]

yandagui

;[FC][最终任务mapper1切页程序]
.ORG $CD9B
BANK_START:
/ e+ |! k- M" d; l( ]2 _0 t STA $70
TXA
ASL
0 d6 j! R7 B/ O2 Z TAX
. l7 V# D1 q$ K' \7 D8 CPORT_SET:
LDA BANK_DATA,X
: m* y# E/ y- _5 Q& L' F STA $6E
LDA $CDB8,X
STA $6F
8 d, X- b; U0 w! R  r" M3 E LDY #$00
LDX #$05
4 Q/ F! y5 t) [ LDA $70
) Z' {: m9 u: ^3 e* yPORT_WRITE:
, X9 m2 m1 d* Q9 o STA ($6E),Y
LSR
1 b, Y) k$ A) S DEX
$ W# t; L" |8 i) u  N+ Q BNE PORT_WRITE
4 l  y! W) q4 u! T3 t2 M RTS


BANK_DATA:
.BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF


;[FC][最终任务mapper1转mapper4切页程序]
/ u, ?! p0 w5 a& Y) p" z+ g .ORG $BFD2   ;初始化跳转
JSR $FFC0
7 ~% g5 ?  K+ X" P
( l5 A# ]/ E* p
.ORG $FFC0    ;切页
8 X% G4 j) E$ N5 m LDA #$06
, O6 X: v+ x( N STA $8000
- m" r$ k+ X, @  y: b" n+ F% Y' C  J LDA #$0E
7 N1 z2 l% t' t# `+ h' F STA $8001
+ @7 U6 \. E* w7 B JSR $8000
RTS

' h; \: X4 G/ h5 g' C .ORG $8000    ;数据复制
LDA #$80
* Y; `! A: ^3 Y STA $A001    ;启用SRAM
PHA
TXA
6 l$ K; z% R5 B. d: O# ~% b PHA
LDX #$00
DATACOPY:     ;数据复制
LDA $8100,X
STA $7200,X
INX
# h- Z1 {' e; A8 Z" F' }1 P CPX #$00
+ G  w# q# L( S& T% Y+ ~4 Z7 t5 a BNE DATACOPY
PLA
TAX
- S9 d% ~$ G) N0 Z& C: }  w+ [+ J PLA
$ A5 G! a: e# f) X. W RTS
$ e6 H1 [( _+ N( B+ Y/ r" C
.ORG $CD9B    ;跳转到转换的切页程序
5 E( u" R: l6 {9 v4 g STA $70
# j4 L7 |# w/ T" u  E, a( S+ }( x& W+ b JSR $7200
# @6 N( ], e. I& c+ g RTS
8 n) G" b, z  L" C$ `
  .ORG $7300
/ [! k+ M3 D- n: X) T* Y5 mM1_TO_M4:    ;切页程序
CPX #$00
" R# G% D4 W7 _" s# M* v BEQ REG_SET
CPX #$01
BEQ PPU_BANK_0000
" s; r( J+ H, b- J0 t: Z0 Q  d CPX #$02
BEQ PPU_BANK_1000
CPX #$03
: V, G0 ^9 {3 |) i/ X BEQ PRG_BANK
, X! c8 c, ]& y% x% Q5 [! e; o! MREG_SET:
  [2 d+ f& V5 C+ \4 o5 y: G/ p9 k7 S STA $A000
RTS
  .ORG $7320
, g' P0 U4 _& j5 i- \2 d- VPRG_BANK:    ;PRG切页
PHA
LDA #$06
- W0 `1 ]4 K: G) p" F STA $8000
1 J( |- V0 R' P0 o: q) ], ] PLA
4 _# c  b6 R! {) J ASL
5 b0 O5 H' ^  f. w3 K STA $8001
& s' E- d) x5 v1 U1 p ORA #$01
PHA
LDA #$07
STA $8000
PLA
STA $8001
RTS
. N" y. T/ Y, k5 c$ k; m .ORG $7340
+ b. T% s5 U- ]2 tPPU_BANK_0000:    ;精灵切页
PHA
* ~$ B$ |# s- ?8 j/ A1 T9 i5 y ASL
  z7 M" O% ?3 |$ k; t0 F ASL
PHA
& l* x4 c. v# j. U LDA #$00
STA $8000
8 [' ?6 G, p. R PLA
STA $8001
" [4 W4 S( x4 {5 D* c3 E1 p ADC #$02
! |: D! H0 F( \ PHA
LDA #$01
STA $8000
: ]3 G4 W5 Y+ x! d PLA
STA $8001
PLA
7 f- }0 w# ^: I( Y" D% ? RTS
3 }4 L6 }3 y+ r' [4 D
4 H& E7 I* q: [9 T  D' v! @. b( ~  .ORG $7360
! L  h$ L, Y6 S* ~: {0 t' Q2 @PPU_BANK_1000:    ;背景切页
1 O/ X: Q5 ?$ o) [5 ^2 R3 } PHA
4 w/ I& n$ f- z+ E$ b) H* u9 ^# ~ ASL
ASL
PHA
LDA #$02
STA $8000
- F) a* f( [  [6 e: i$ Y PLA
' f# J$ j( j, {, m$ \ STA $8001
% I  J7 C- I5 a+ T- a ADC #$01
- k" i. E8 W( f; B( {9 G# W5 @ PHA
: I9 T# E  R, A- } LDA #$03
' c1 Y1 c; S0 a  b' D; p STA $8000
PLA
- o$ k" a/ F$ w/ t" `, I% q- I/ ^( R STA $8001
$ l+ S2 N. F5 w1 z: w7 ? ADC #$01
* _% x  `: e/ ]' J PHA
2 T; k$ M3 Y- V LDA #$04
STA $8000
) R3 N4 O7 _* a( A* d) K PLA
* e& h, a/ t  ` STA $8001
ADC #$01
- D5 z/ p3 a0 ]# O) w6 f& O" E PHA
, Z( U# t+ U2 @( U LDA #$05
STA $8000
PLA
STA $8001
PLA
RTS

) h: a4 `1 ~6 |3 s: I

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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。。。