[FC][最终任务转mapper4程序]

yandagui

;[FC][最终任务mapper1切页程序]
! o- y; A5 h/ h" T  D9 M1 f: w8 n .ORG $CD9B
BANK_START:
STA $70
TXA
ASL
TAX
PORT_SET:
- D  p. R! X$ u# ^% A LDA BANK_DATA,X
STA $6E
LDA $CDB8,X
STA $6F
9 |) M; S( q1 O( Z2 n  u% ^0 A; [4 x LDY #$00
9 E2 C% H: A8 ]3 q* B LDX #$05
( q( ]# i: o; d$ a) ]8 h7 \ LDA $70
PORT_WRITE:
2 e" n, r) T  v9 T STA ($6E),Y
LSR
DEX
BNE PORT_WRITE
RTS


  Y7 f& d( X' ~& GBANK_DATA:
/ u8 d3 q( V7 b9 `+ O& I; u .BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF

/ F; j! D7 d$ L/ j1 ^
;[FC][最终任务mapper1转mapper4切页程序]
.ORG $BFD2   ;初始化跳转
/ Z, ?* K. l$ Q JSR $FFC0

2 z! [" @6 k+ h3 |$ N+ z& O
5 [) B  h+ l4 N, } .ORG $FFC0    ;切页
LDA #$06
STA $8000
1 @6 r. t& }' g/ }6 { LDA #$0E
STA $8001
4 I$ }; D7 G8 L0 s( w6 x JSR $8000
RTS
2 @' y8 i# M' S, [1 W
.ORG $8000    ;数据复制
LDA #$80
- j% v5 m: k- J4 B. F STA $A001    ;启用SRAM
PHA
. d: d$ s; y) {7 t TXA
% e+ m8 q$ e" R+ p, ?- ^8 S PHA
4 C# N; H# w! g! B2 M9 ?/ L LDX #$00
DATACOPY:     ;数据复制
- X0 D+ x; }+ Z) C$ m/ X LDA $8100,X
' T8 I& O) ?/ C4 ?9 A" O1 H STA $7200,X
- }% V  ]$ F& a. u INX
CPX #$00
: R1 S/ X5 U: _& y$ B BNE DATACOPY
PLA
+ L: R9 a+ b7 G TAX
PLA
3 w4 x& ~% g7 r0 e9 C- m6 @; k RTS
# c) x, `' H! m. v, }
.ORG $CD9B    ;跳转到转换的切页程序
4 R: I+ ]3 |: c! i& J, }0 { STA $70
JSR $7200
RTS
& B7 F: `; k) ~- {: t+ k( T4 f. J
  .ORG $7300
8 M3 t  f/ A7 M, i/ M( }& n9 IM1_TO_M4:    ;切页程序
CPX #$00
BEQ REG_SET
1 {5 g: r- r1 H9 l  ~! i CPX #$01
BEQ PPU_BANK_0000
CPX #$02
BEQ PPU_BANK_1000
: |2 [" D, {* B$ d CPX #$03
BEQ PRG_BANK
, d' X( t, a" h( oREG_SET:
! V2 J" l. l9 z2 x: G* v STA $A000
RTS
2 x0 u7 b9 B0 X/ \" V  .ORG $7320
* }# v- @4 P' K7 i; APRG_BANK:    ;PRG切页
$ r9 w) U  _% R& ?- g* q  I PHA
LDA #$06
STA $8000
6 X  }, g+ v: |* k% R4 U% q; z5 ] PLA
9 j7 W8 L# v8 p' ]4 u ASL
STA $8001
# s7 @- @3 S- T$ u. h% f0 @ ORA #$01
) _+ T* [& u0 {, G8 o/ I PHA
LDA #$07
. C$ ~% [. X5 P& n5 x STA $8000
PLA
STA $8001
+ Z5 Q1 B$ G" N! b& L' l0 u RTS
.ORG $7340
PPU_BANK_0000:    ;精灵切页
PHA
6 D3 L0 h( g0 N, W: r1 P ASL
) Y( x; b% a3 G0 ]; I. Q, V ASL
4 w/ u  H& m, ^9 l' V0 W, |/ ? PHA
LDA #$00
" k- k5 U9 d4 {# e STA $8000
- R" X9 I0 j- F/ n9 U/ r PLA
' O" U" J7 k" Z STA $8001
ADC #$02
. \, O2 h$ ]1 X- w8 y- h% n( \ PHA
5 i) z3 r3 Q- E6 d" }" C/ `4 v LDA #$01
8 X6 G) [( b( r% f* O+ d STA $8000
PLA
( L% c, P1 N( k STA $8001
PLA
RTS

* x0 N7 J. F% B* w5 l; l  .ORG $7360
. E0 D, N& R2 _: q7 h6 sPPU_BANK_1000:    ;背景切页
PHA
; ^% g7 j3 w& Y ASL
9 r8 [. C5 x! I8 _1 m ASL
7 w0 D  v, X5 w3 x- z; P1 P# M PHA
8 H" m' M# `9 i3 Y* N' k* f LDA #$02
4 w5 ]* x2 n9 V* S; H/ K( x8 q- h& K- @. i STA $8000
# ^) H! d2 G8 R( x! R- } PLA
+ B0 H% \, }4 I; X STA $8001
ADC #$01
+ l; S6 S. L: j# ^2 |4 \8 {* {" P$ O PHA
  D% M7 j7 v# i LDA #$03
STA $8000
. c1 Q# c, p0 v8 V PLA
STA $8001
ADC #$01
PHA
( _0 ~" e' B/ u' n. N LDA #$04
% v4 O0 J8 i3 G& x6 |4 e* ]" T STA $8000
' u5 h9 Q+ j3 M' Q& |4 r PLA
STA $8001
ADC #$01
+ F; @  Q- Y7 i: B PHA
( n0 r5 q( i, c! ~$ O; L LDA #$05
STA $8000
PLA
STA $8001
PLA
( {1 Z5 R2 K5 z" ~ RTS
, Q& Z7 _0 W5 F

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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。。。