[FC][最终任务转mapper4程序]

yandagui

;[FC][最终任务mapper1切页程序]
+ [# J8 Z# A- o, Q .ORG $CD9B
BANK_START:
2 i* O; C& [4 M; u6 ~  q: @ STA $70
  n1 y/ j6 @/ E/ B TXA
' E% E8 X4 w% `) S) G ASL
2 @" J: [# P, C: Z' }' o* q TAX
! x$ }  C: g+ X7 A0 @# J7 [PORT_SET:
LDA BANK_DATA,X
STA $6E
1 g1 M8 {) h) ?7 q' L LDA $CDB8,X
STA $6F
2 w5 z" `( g  u7 F* D% d$ i LDY #$00
LDX #$05
0 P# _5 }5 Z) w  U% f+ C LDA $70
( U+ j  l( U7 {- ~3 l4 OPORT_WRITE:
  l! A3 H  _9 `4 z1 {& W# S STA ($6E),Y
, V' y# t1 F7 Z LSR
DEX
- i# K$ y; w# p; V& t BNE PORT_WRITE
3 d2 @$ {. ?3 c, L RTS

# p$ O4 H! l' A7 [
BANK_DATA:
.BYTE $00,$80,$FF,$BF,$00,$C0,$FF,$FF
# k+ L/ [+ G5 e# C  R
- c5 z- ~8 g# j3 T+ K
2 m- ]: d* k4 {! B;[FC][最终任务mapper1转mapper4切页程序]
.ORG $BFD2   ;初始化跳转
JSR $FFC0

. t& S: @$ g& u, w. v
.ORG $FFC0    ;切页
LDA #$06
STA $8000
LDA #$0E
STA $8001
JSR $8000
% E% N6 Z6 h1 h  R5 C RTS

.ORG $8000    ;数据复制
1 Y7 b3 U. ^- N0 C$ ? LDA #$80
STA $A001    ;启用SRAM
2 O( u6 |* m, X+ E- G PHA
TXA
PHA
LDX #$00
7 p- D6 C& ^$ R1 o" ^, g# ADATACOPY:     ;数据复制
LDA $8100,X
STA $7200,X
* k1 B2 Y6 z1 m9 C# d/ ^) f INX
  a6 @0 S& [8 Q+ B3 L2 V7 Q& [ CPX #$00
BNE DATACOPY
. u5 e% {0 H1 C6 P& k+ `) ?# S PLA
) P' \( V1 R4 L* P$ x, | TAX
' z3 z# Q0 Q6 x# S; D PLA
RTS
. w. G  P& C; @: R( g
.ORG $CD9B    ;跳转到转换的切页程序
  g/ O. D; ]$ ~" V0 z7 z# L7 h0 p STA $70
" [; V0 s. g' y+ M8 x JSR $7200
RTS

+ d% X% D1 ~1 s5 f1 v5 x  .ORG $7300
M1_TO_M4:    ;切页程序
: l- _. [* F8 E# T7 T CPX #$00
BEQ REG_SET
3 ~" D1 n+ h3 p0 G" g* `) ^3 r/ g CPX #$01
BEQ PPU_BANK_0000
CPX #$02
/ F/ N9 ?) Z8 i: f5 }7 _ BEQ PPU_BANK_1000
CPX #$03
, b: \3 @8 d4 E) A# D BEQ PRG_BANK
3 ?; o! {! I2 ~2 K" J% xREG_SET:
+ c1 _# u6 P6 [5 g STA $A000
RTS
; I( g# |5 c' i4 l  .ORG $7320
PRG_BANK:    ;PRG切页
PHA
- S$ E( x0 K2 }- ^* V LDA #$06
+ @& J4 ?8 r0 V+ Y STA $8000
( Z8 t) s1 l  U9 a/ Y PLA
  F  P* q- S8 f' l# T. R ASL
! c' F, X1 }7 J' b STA $8001
ORA #$01
PHA
! i4 d6 o. H" I; O1 m9 [ LDA #$07
STA $8000
( |" s- f$ Z7 E4 p3 @# F PLA
STA $8001
RTS
.ORG $7340
, u8 o+ i) W4 M, z2 tPPU_BANK_0000:    ;精灵切页
2 d" A9 b; s2 i: T PHA
" C+ V( c7 _' s1 C  R! c: r ASL
, ~) C1 L/ Y5 h. h% A7 I" l ASL
: L: |' }1 F# ]- w9 Q PHA
LDA #$00
  ]- @! _; q8 ] STA $8000
+ U+ ]. S3 x0 J6 A. `- r* t7 v PLA
5 ^- ?* L5 }# y3 e+ H: Q" g4 e STA $8001
ADC #$02
/ K5 t0 X: \9 L* z1 t/ K* ]" m7 y PHA
% j1 g+ [" \/ R; a LDA #$01
: L, J( ?2 l) _/ C; d, Z! h+ f STA $8000
( q  x, \7 D, a. Y3 E" `. V PLA
: d; N- t1 b! } STA $8001
PLA
RTS
! O* c+ k9 l0 H+ _+ i, j
  .ORG $7360
PPU_BANK_1000:    ;背景切页
PHA
ASL
3 B8 q" T. _- ^& b6 c ASL
5 t5 C3 [5 k5 }2 U$ N2 }6 b PHA
LDA #$02
STA $8000
PLA
' y+ q4 r; K8 o' _ STA $8001
ADC #$01
PHA
LDA #$03
0 [4 V$ c9 L) F: u STA $8000
PLA
  w! }! o! Q) u+ H3 Y$ p" V STA $8001
ADC #$01
PHA
LDA #$04
% J% O( |) c  c& v9 U5 I1 U) Y STA $8000
PLA
STA $8001
1 z6 }- o, M) ^( @# P5 o ADC #$01
PHA
* u8 ?3 ~" a) }' f' ?3 O LDA #$05
STA $8000
PLA
: K9 D% n6 |8 o5 T  b; P STA $8001
+ L8 ?/ y& |; G8 A# x) y! { PLA
3 h  V. K$ A. S2 V; @  u  Y# Q RTS
% [! r- X/ {6 d

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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。。。