[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 $70
+ e* `8 y, n+ d- d& r TXA
ASL
TAX
0 O( L3 t4 e' |4 c! cPORT_SET:
0 U/ l1 d$ ^, L% L LDA BANK_DATA,X
" d4 G& D' ^0 N, ^* A0 t( m. ^4 R9 Y STA $6E
LDA $CDB8,X
/ _5 p; C: W2 x; o- w STA $6F
* J! @( Y6 u. n# c9 z1 ` LDY #$00
LDX #$05
( x8 [  W& p/ H$ [2 @" D) y LDA $70
, [! A+ ^( e% A6 [4 u: xPORT_WRITE:
9 R1 `- Z+ }6 Q( j% |2 l  z1 G STA ($6E),Y
! @/ _" c5 r4 h) B2 v' Q. d LSR
DEX
% p/ x3 L& p9 g( L BNE PORT_WRITE
RTS
5 [7 ], b$ |9 z9 `6 ?
5 N* j0 v: Y$ C( f: ^
% g4 _6 x# c! W. L# kBANK_DATA:
9 X+ y# M" e. `- h .BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF
+ r4 W- [$ z4 |" U/ R! K

3 X# ]: w: V2 f6 z) D/ ^& }& f+ E;[FC][最终任务mapper1转mapper4切页程序]
! I' l3 @6 [' X2 L7 X+ C) H9 A .ORG $BFD2   ;初始化跳转
7 |2 E" s2 y- e9 l JSR $FFC0
7 E! l' a5 s5 z5 \% |

( Q' X* i; ^& x1 y .ORG $FFC0    ;切页
LDA #$06
STA $8000
LDA #$0E
- I# W  G, Z' t& U8 T STA $8001
JSR $8000
RTS
% m( U- ~! @$ ?
.ORG $8000    ;数据复制
LDA #$80
STA $A001    ;启用SRAM
$ I( V. m  U" d: A PHA
2 \2 J5 T6 ]% ~0 E TXA
3 t2 k! ]0 d9 M$ p- N* N PHA
: i; N' Y1 Y2 f: l LDX #$00
DATACOPY:     ;数据复制
$ }5 x8 e8 R8 f5 s+ ?" Z LDA $8100,X
0 L5 E7 J% ^0 l, p8 f' T STA $7200,X
INX
% f9 x' j  l/ o" g( l, X CPX #$00
BNE DATACOPY
$ Z& h0 r7 V0 Q+ e  m PLA
* u5 I+ _, {) Q! z4 c6 r TAX
$ y7 \5 m% n+ T4 H& X/ A' N( Y' z PLA
RTS
7 K3 p- C9 k$ L
. u. v% U2 B, }/ h" F .ORG $CD9B    ;跳转到转换的切页程序
STA $70
JSR $7200
7 I1 Z* q! d( c RTS

" {- c4 C7 ]' s' h  .ORG $7300
M1_TO_M4:    ;切页程序
9 v* p: @( u! T1 Y" H$ B CPX #$00
BEQ REG_SET
) v# D% T, Y, Q  d* ?) y" @ CPX #$01
BEQ PPU_BANK_0000
CPX #$02
BEQ PPU_BANK_1000
CPX #$03
  t/ v1 _+ i7 v2 x0 N/ A! c# o' \8 E BEQ PRG_BANK
REG_SET:
STA $A000
RTS
2 ^3 f: Q' O' H) }. t8 p  _  .ORG $7320
. d5 D) z# {1 ?, K9 b' }PRG_BANK:    ;PRG切页
PHA
$ ]5 _6 O6 K' \. E) y/ @( S LDA #$06
STA $8000
" |) U+ e/ C+ W2 V PLA
4 h! {6 ^% {$ K5 k: g- ~ ASL
STA $8001
0 [. G8 \. a: X' G4 A" q2 k ORA #$01
: o7 w- a- i5 [2 ?' R PHA
LDA #$07
STA $8000
; r/ s. ]6 {) j. ?9 m PLA
STA $8001
RTS
.ORG $7340
PPU_BANK_0000:    ;精灵切页
& s4 K: @* v) r) L9 Z PHA
ASL
& E( t5 C+ F% L ASL
/ S; V8 `% S# M) Q& r  C0 J PHA
0 @+ \- N# |& N: y' c LDA #$00
STA $8000
/ N# v& J# x4 @6 E, Y PLA
STA $8001
ADC #$02
3 K" t- z* P1 H( P4 G9 l/ {; V PHA
1 d5 Z) `/ W& N8 Z1 p LDA #$01
STA $8000
0 X: p( H* n. @7 F6 _0 |- S PLA
4 ]$ C4 `  g5 r  f  I+ ^; P STA $8001
# f  @% g- i' d! O' N PLA
/ a, {- [! y) H RTS

  .ORG $7360
PPU_BANK_1000:    ;背景切页
" ~" O4 k2 Y+ _0 p4 v PHA
, ~: a2 K) @) A, B% Z5 p ASL
0 l) i4 k+ B; V, s. ^0 K ASL
PHA
LDA #$02
% G, y2 c8 ]& n' m- f* j4 J STA $8000
; D" m7 N& E' _& R9 V- L PLA
1 z; T) X4 @( t1 Z+ v) }9 F STA $8001
ADC #$01
PHA
( d7 c, y# k5 P LDA #$03
4 [0 d4 c& v8 J: G% N: b1 g6 M STA $8000
PLA
7 b; p% R: R3 Z  A3 {2 T0 \ STA $8001
6 Q; v" H. b: S7 O) e ADC #$01
PHA
' x6 D) A7 G/ b( g$ y6 k LDA #$04
STA $8000
8 m- b/ N" \1 P- O) t PLA
STA $8001
ADC #$01
+ y7 }' o  A% B PHA
LDA #$05
STA $8000
, F- Q; Y  J$ S- n PLA
STA $8001
PLA
- T5 z, k7 a6 q+ h  }2 X2 v RTS
# E) |2 e: |' K8 {* A$ J+ c4 n+ v
+ t) d; f7 o" [: }

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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。。。