[FC][最终任务转mapper4程序]

yandagui

;[FC][最终任务mapper1切页程序]
/ s; m% Q3 u5 j6 }! I0 B .ORG $CD9B
BANK_START:
STA $70
TXA
+ ~$ y! H2 e( F% ?- R; R  J. [$ u ASL
1 Y6 z6 M& e( c6 Z( H" T TAX
PORT_SET:
  @0 d2 P6 V1 A: r: }* i2 X2 y; B LDA BANK_DATA,X
STA $6E
LDA $CDB8,X
; n+ k3 ]' w, G7 x STA $6F
LDY #$00
3 A- J7 t" |% p* W. Q LDX #$05
7 z% \! ]  A" i# V LDA $70
PORT_WRITE:
STA ($6E),Y
LSR
" X3 k( S6 Q1 X' P% S! v DEX
6 a/ k8 B' X; O& W5 Y) a BNE PORT_WRITE
RTS
# ^% }. W# J4 m
8 ~$ `' I, h, g: t# X
BANK_DATA:
8 M4 e/ [4 |& a* ^9 p) Z .BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF


' t% R9 Q( U2 s/ a% [;[FC][最终任务mapper1转mapper4切页程序]
.ORG $BFD2   ;初始化跳转
JSR $FFC0


3 }/ N; N% P4 m) Z& N1 Q2 v0 G .ORG $FFC0    ;切页
LDA #$06
% _  c0 a* v9 `, c1 F STA $8000
$ u2 P8 q# a# O/ x. e0 m& y LDA #$0E
5 Z5 x) d3 i1 B- F0 J9 @ STA $8001
JSR $8000
RTS
) Y% x3 `5 f9 @
.ORG $8000    ;数据复制
. T; |9 k6 `) m1 L: l1 K8 E0 U LDA #$80
5 a: E1 ]6 }8 L STA $A001    ;启用SRAM
. M; {6 H' E4 _. d4 X PHA
TXA
0 Q+ f) D0 u; Z! E PHA
( g# N0 r' W) c. s- s! P LDX #$00
DATACOPY:     ;数据复制
' [' B8 s: V7 v; l LDA $8100,X
" {: r0 ^+ p  G# P# B  \ STA $7200,X
% G) M$ K# L* F" k( N- t; O- v( H INX
CPX #$00
BNE DATACOPY
PLA
) u: c7 i9 G7 X9 I# `4 { TAX
" A- z# U; j7 n7 B PLA
RTS
2 a' T4 ~9 z; J: L
1 [$ u' C4 b3 k, D2 e2 R .ORG $CD9B    ;跳转到转换的切页程序
0 B9 Y% N7 D+ R4 |1 \7 ~0 _' @ STA $70
JSR $7200
RTS
( c7 r' C  A. |8 |" R5 f  k- A( l0 z
9 S/ |% ^4 k; {  .ORG $7300
M1_TO_M4:    ;切页程序
/ D$ u7 g& h' T* Y1 N CPX #$00
5 K% a/ {+ ]& P: X% N BEQ REG_SET
CPX #$01
  d; t* n0 |+ ]8 |3 J3 X3 g BEQ PPU_BANK_0000
3 g% |8 d& I  ~2 P* p$ [& c% A  w) z CPX #$02
BEQ PPU_BANK_1000
5 _# X7 o, ^9 \9 X" y- L CPX #$03
6 S$ F1 Y: X5 @* ]3 L* V- R BEQ PRG_BANK
REG_SET:
STA $A000
7 G  f, a) P+ e8 s. B RTS
8 k. Q: D7 p, [8 ]. v, L: V, L  .ORG $7320
) r5 q$ v6 D+ y, z: \% s% y" rPRG_BANK:    ;PRG切页
PHA
  {- I. l; F' V# o! P6 U LDA #$06
STA $8000
PLA
ASL
STA $8001
8 j8 {8 ?9 G8 O& f2 k ORA #$01
- F4 d  ]+ Z* k2 m) ? PHA
( n0 S, {" k! C0 f LDA #$07
STA $8000
PLA
STA $8001
6 c- z# u4 {  q; i* p' R& R RTS
; i7 }3 K9 c) k1 J' ] .ORG $7340
0 D* {" A% M5 B& HPPU_BANK_0000:    ;精灵切页
PHA
ASL
. n& j9 I* D; R3 R ASL
PHA
LDA #$00
7 ?) S& h( Y' E) Q STA $8000
PLA
2 n  q7 F. z4 p) r4 p$ Q8 o2 ? STA $8001
2 K% t6 \# l" q6 d! k ADC #$02
( P1 Q" G. o# J; x1 g; v PHA
LDA #$01
STA $8000
: [0 B3 ^" U. |5 R PLA
1 q) d/ [$ R0 f3 [$ F/ ?4 B; v STA $8001
4 D( p5 Q: {8 y" W/ B2 @: u PLA
* }$ k4 @; _3 D2 O: A RTS

3 d, i" ^6 ^& _& m; {  .ORG $7360
+ Z: l  S  t9 o/ v/ z" c% H* U  y, l( mPPU_BANK_1000:    ;背景切页
5 M: r- Z% P8 l% s/ Q  w PHA
ASL
ASL
$ O+ X/ G. c& r4 O7 r7 }7 ` PHA
. p6 n: G4 W+ O LDA #$02
- d$ n* K0 b- D STA $8000
/ s7 j$ [! L! q. ]* E. ? PLA
; Y( @3 Y. }" q& Z; L9 { STA $8001
ADC #$01
, A+ n2 A* |" X PHA
LDA #$03
STA $8000
9 [. v) p/ ^5 ?- [ PLA
2 [+ u# ^3 d; i. j' v STA $8001
ADC #$01
PHA
LDA #$04
. ~& V$ C5 U$ w1 l2 n$ w% ~ STA $8000
PLA
) a: y- t  i* g' |0 W% x STA $8001
ADC #$01
PHA
: U) L5 \# ^' k$ U. ]+ K9 Q# H LDA #$05
9 r9 C8 X$ ~3 I. G% P4 i# n STA $8000
; i+ b0 ]8 M& N: k0 a6 q) G PLA
STA $8001
PLA
+ n$ R8 Y/ {) k RTS
+ z5 C0 S3 D9 V" \1 c0 ~
  o9 }; }8 A' E. K

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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。。。