[分享]ftplink不完全分析

ttheaven

忘了说了,这是NC2600的,其他型号只要I/O端口相同过程应该是一样的.

qyfcool

太棒了！狂支持啊，楼主辛苦了。

汉元电子er

IO部分注释得很少么 呵呵是分析通讯数据知道的吧 FL的通讯协议很简单的

Loading

为什么没有人将SYS-TOOLS移植到TC1000S上呢

郁闷

还有WQXHEN

dragon_

TC1000不是有hotlink吗？

starwing

不说了，又慢又不好，连ebk都没办法传……

gt945

我已经研究出来了，我在wqx上已开始编传送工具了，只要对方有systool就能传！

dragon_

楼上是不是准备跳票了？

windybell

说点不相干的

上个月电脑装了卡巴斯机杀毒软件，干掉的第一个木马居然是Superlink.exe!

不知道是哪个变态把木马加到Superlink里去了，大家一起鄙视。

leesoft

汗
木马真可恶

Isword

现在源代码都有了.........
回来再看看这个帖子,纪念一下....

leesoft

哈哈
有了源代码，可以自己编译了，不用怕木马了

ulong001

要是菜鸟等着吃现成的呢?

leesoft

那就张大嘴吧

ttheaven

这里只分析了sys-tools的通讯部分。。。
流程
1.寻找通讯设备
2.找到通讯设备后,接收将要进行的操作的指令,再接收数据的大小及数据至缓冲区,若操作失败则等待重新操作的信号
3.重复2至通讯结束

详细过程如下:

;初始化计数器
$6B04: A9 00 LDA #$00
$6B06: 8D C9 0F STA $0FC9
$6B09: A9 10 LDA #$10
$6B0B: 8D CA 0F STA $0FCA
$6B0E: 60 RTS

;计数器减
$6B0F: AD C9 0F LDA $0FC9
$6B12: D0 03 BNE $6B17
$6B14: CE CA 0F DEC $0FCA
$6B17: CE C9 0F DEC $0FC9
$6B1A: AD CA 0F LDA $0FCA
$6B1D: C9 00 CMP #$00
$6B1F: D0 05 BNE $6B26
$6B21: AD C9 0F LDA $0FC9
$6B24: C9 00 CMP #$00
$6B26: 60 RTS

;???
$6B27: 20 3C 6C JSR $6C3C
$6B2A: 85 45 STA $45
$6B2C: 60 RTS

;等待I/O Ready
$6B2D: 20 04 6B JSR $6B04;(初始化计数器)
$6B30: A9 00 LDA #$00
$6B32: 8D AA 0F STA $0FAA
$6B35: 08 PHP
$6B36: 48 PHA
$6B37: A5 3D LDA $3D
$6B39: 29 FC AND #$FC
$6B3B: 09 00 ORA #$00
$6B3D: 85 3D STA $3D
$6B3F: 68 PLA
$6B40: 28 PLP
$6B41: A9 00 LDA #$00
$6B43: 85 3D STA $3D
$6B45: A9 04 LDA #$04
$6B47: 85 3D STA $3D
$6B49: 08 PHP
$6B4A: 48 PHA
$6B4B: A5 3D LDA $3D
$6B4D: 29 FC AND #$FC
$6B4F: 09 00 ORA #$00
$6B51: 85 3D STA $3D
$6B53: 68 PLA
$6B54: 28 PLP
$6B55: A5 3B LDA $3B
$6B57: C9 60 CMP #$60
$6B59: F0 0A BEQ $6B65;转准备好了
$6B5B: 20 0F 6B JSR $6B0F;(计数器减)
$6B5E: D0 D5 BNE $6B65
$6B60: A9 01 LDA #$01
$6B62: 8D AA 0F STA $0FAA
$6B65: 60 RTS

;打开串口通讯
$6B66: A5 3D LDA $3D
$6B68: 29 FC AND #$FC
$6B6A: 09 00 ORA #$00
$6B6C: 85 3D STA $3D
$6B6E: A9 04 LDA #$04
$6B70: 85 3D STA $3D
$6B72: A5 3D LDA $3D
$6B74: 29 FC AND #$FC
$6B76: 09 00 ORA #$00
$6B78: 85 3D STA $3D
$6B7A: A9 01 LDA #$01
$6B7C: 85 3B STA $3B
$6B7E: A9 20 LDA #$20
$6B80: 85 3E STA $3E
$6B82: AD 3A 04 LDA $043A
$6B85: 09 10 ORA #$10
$6B87: 85 3F STA $3F
$6B89: 8D 3A 04 STA $043A
$6B8C: AD 3B 04 LDA $043B
$6B8F: 09 10 ORA #$10
$6B91: 85 1E STA $1E
$6B93: 8D 3B 04 STA $043B
$6B96: 08 PHP
$6B97: 48 PHA
$6B98: A5 3D LDA $3D
$6B9A: 29 FC AND #$FC
$6B9C: 09 03 ORA #$03
$6B9E: 85 3D STA $3D
$6BA0: 68 PLA
$6BA1: 28 PLP
$6BA2: A9 80 LDA #$80
$6BA4: 85 3A STA $3A
$6BA6: 85 3C STA $3C
$6BA8: 08 PHP
$6BA9: 48 PHA
$6BAA: A5 3D LDA $3D
$6BAC: 29 FC AND #$FC
$6BAE: 09 01 ORA #$01
$6BB0: 85 3D STA $3D
$6BB2: 68 PLA
$6BB3: 28 PLP
$6BB4: A9 00 LDA #$00
$6BB6: 85 3B STA $3B
$6BB8: A9 30 LDA #$30
$6BBA: 85 3D STA $3D
$6BBC: 20 2D 6B JSR $6B2D;(等I/O READY)
$6BBF: 08 PHP
$6BC0: 48 PHA
$6BC1: A5 3D LDA $3D
$6BC3: 29 FC AND #$FC
$6BC5: 09 01 ORA #$01
$6BC7: 85 3D STA $3D
$6BC9: 68 PLA
$6BCA: 28 PLP
$6BCB: A9 01 LDA #$01
$6BCD: 85 3A STA $3A
$6BCF: 08 PHP
$6BD0: 48 PHA
$6BD1: A5 3D LDA $3D
$6BD3: 29 FC AND #$FC
$6BD5: 09 00 ORA #$00
$6BD7: 85 3D STA $3D
$6BD9: 68 PLA
$6BDA: 28 PLP
$6BDB: A9 00 LDA #$00
$6BDD: 85 3C STA $3C
$6BDF: 08 PHP
$6BE0: 48 PHA
$6BE1: A5 3D LDA $3D
$6BE3: 29 FC AND #$FC
$6BE5: 09 02 ORA #$02
$6BE7: 85 3D STA $3D
$6BE9: 68 PLA
$6BEA: 28 PLP
$6BEB: A9 20 LDA #$20
$6BED: 85 3C STA $3C
$6BEF: 60 RTS

;关闭串口通讯
$6BF0: A5 3D LDA $3D
$6BF2: 29 FC AND #$FC
$6BF4: 09 00 ORA #$00
$6BF6: 85 3D STA $3D
$6BF8: A5 3D LDA $3D
$6BFA: 29 FB AND #$FB
$6BFC: 85 3D STA $3D
$6BFE: A5 3D LDA $3D
$6C00: 29 FC AND #$FC
$6C02: 09 02 ORA #$02
$6C04: 85 3D STA $3D
$6C06: A9 00 LDA #$00
$6C08: 85 3C STA $3C
$6C0A: 60 RTS

;发送一个字节
$6C0B: 48 PHA
$6C0C: A5 3D LDA $3D
$6C0E: 29 FC AND #$FC
$6C11: 09 00 ORA #$00
$6C13: 85 3D STA $3D
$6C15: 20 04 6B JSR $6B04;(初始化计数器)
$6C17: A5 3B LDA $3B
$6C19: 29 20 AND #$20
$6C1B: D0 0A BNE $6C27;转发送
$6C1D: 20 0F 6B JSR $6B0F;(计数器减)
$6C20: D0 F5 BNE $6C17;继续等
;超时,发送字节时出错
$6C22: A9 0A LDA #$0A
$6C24: 4C 88 6D JMP $6D88
$6C27: 68 PLA
$6C28: 85 3A STA $3A
$6C2A: 60 RTS

;接收一个字节
$6C2B: A5 3D LDA $3D
$6C2D: 29 FC AND #$FC
$6C2F: 09 00 ORA #$00
$6C31: 85 3D STA $3D
$6C33: A5 3B LDA $3B
$6C35: 29 01 AND #$01
$6C37: F0 FA A5 BEQ $6C33
$6C39: A5 3A LDA $3A
$6C3B: 60 RTS

;???
$6C3C: A9 00 LDA #$00
$6C3E: 85 3E STA $3E
$6C40: A5 3F LDA $3F
$6C42: 29 3F AND #$3F
$6C44: 60 RTS

;接收一个字节并?
$6C45: A5 3D LDA $3D
$6C47: 29 FC AND #$FC
$6C49: 09 00 ORA #$00
$6C4B: 85 3D STA $3D
$6C4D: A5 3B LDA $3B
$6C4F: 29 01 AND #$01
$6C51: D0 0E BNE $6C61
$6C53: 20 3C 6C JSR $6C3C;(???)
$6C56: 38 SEC;这几句不明白其用途,不过不影响对整个的理解
$6C57: E5 45 SBC $45
$6C59: B0 02 BCS $6C5D
$6C5B: 69 3C ADC #$3C
$6C5D: C9 02 CMP #$02
$6C5F: 90 EC BCC $6C4D
$6C61: A5 3A LDA $3A
$6C63: 60 RTS

;死循环发送"WQX"并判断回应是否为$4C
$6C64: A9 57 LDA #$57
$6C66: 20 0B 6C JSR $6C0B;(发送一个字节)
$6C69: A9 51 LDA #$51
$6C6B: 20 0B 6C JSR $6C0B
$6C6E: A9 58 LDA #$58
$6C70: 20 0B 6C JSR $6C0B
$6C73: 20 2B 6C JSR $6C2B;(接收一个字节)
$6C76: C9 4C CMP #$4C
$6C78: D0 EA BNE $6C64
$6C7A: 60 RTS

;判断上传时连接状态
$6C7B: A5 3D LDA $3D
$6C7D: 29 FC AND #$FC
$6C7F: 09 00 ORA #$00
$6C81: 85 3D STA $3D
$6C83: A5 3B LDA $3B
$6C85: 29 9E AND #$9E
$6C87: D0 09 BNE $6C92;转状态不符
$6C89: A5 3B LDA $3B
$6C8B: 29 60 AND #$60
$6C8D: C9 60 CMP #$60
$6C8F: D0 EA BNE $6C7B;继续等
$6C91: 60 RTS
;状态不符,转上传时连接状态出错
$6C92: A9 01 LDA #$01
$6C94: 4C 88 6D JMP $6D88

;上传缓冲区数据
$6C97: A9 08 LDA #$08
$6C99: 20 0B 6C JSR $6C0B;(发送一个字节)
$6C9C: 20 7B 6C JSR $6C7B;(判断上传时连接状态)
$6C9F: 20 27 6B JSR $6B27;(???)
$6CA2: 20 45 6C JSR $6C45;(接收一个字节并?)
$6CA5: C9 06 CMP #$06;这是上传时的握手信号,WQX发送$08,FTPLINK应返回$06
$6CA7: F0 05 BEQ $6CAE
$6CA9: A9 02 LDA #$02;上传时握手信号错
$6CAB: 4C 88 6D JMP $6D88
$6CAE: AD 0F 09 LDA $090F;告诉FTPLINK待传文件大小
$6CB1: 85 80 STA $80
$6CB3: 20 0B 6C JSR $6C0B
$6CB6: AD 10 09 LDA $0910
$6CB9: 85 81 STA $81
$6CBB: 20 0B 6C JSR $6C0B
$6CBE: A5 80 LDA $80
$6CC0: 05 81 ORA $81
$6CC2: F0 4E BEQ $6D14;转文件大小为零
$6CC4: A9 00 LDA #$00;下面的代码用于发送并逐个与$84异或,($80)大小,($82)地址,2KB为单位
$6CC6: 85 82 STA $82
$6CC8: A9 20 LDA #$20
$6CCA: 85 83 STA $83
$6CCC: A9 00 LDA #$00
$6CCE: 85 84 STA $84
$6CD0: A2 08 LDX #$08
$6CD2: A0 00 LDY #$00
$6CD4: B1 82 LDA ($82),Y
$6CD6: 48 PHA
$6CD7: 20 0B 6C JSR $6C0B;(发送一个字节)
$6CDA: 68 PLA
$6CDB: 45 84 EOR $84
$6CDD: 85 84 STA $84
$6CDF: CA DEX
$6CE0: D0 05 BNE $6CE7
$6CE2: 20 7B 6C JSR $6C7B;(判断上传时连接状态)
$6CE5: A2 08 LDX #$08
$6CE7: E6 82 INC $82
$6CE9: D0 02 BNE $6CED
$6CEB: E6 83 INC $83
$6CED: A5 80 LDA $80
$6CEF: D0 02 BNE $6CF3
$6CF1: C6 81 DEC $81
$6CF3: C6 80 DEC $80
$6CF5: A5 80 LDA $80
$6CF7: 05 81 ORA $81
$6CF9: D0 D7 BNE $6CD2
$6CFB: A5 84 LDA $84;将最后的异或值传给FTPLINK
$6CFD: 20 0B 6C JSR $6C0B
$6D00: 20 7B 6C JSR $6C7B;(判断上传时连接状态)
$6D03: 20 27 6B JSR $6B27;(???)
$6D06: 20 45 6C JSR $6C45;(接收一个字节并?)
$6D09: C9 06 CMP #$06;异或值正确吗
$6D0B: F0 05 BEQ $6D12;转正常结束
$6D0D: A9 03 LDA #$03;上传时结束信号错
$6D0F: 4C 88 6D JMP $6D88
$6D12: 60 RTS

;获取操作指令及接收数据到缓冲
$6D13: A9 05 LDA #$05;每次传输以此信号开始
$6D15: 20 0B 6C JSR $6C0B;(发送一个字节)
$6D18: 20 7B 6C JSR $6C7B;(判断上传时连接状态)
$6D1B: 20 27 6B JSR $6B27
$6D1E: 20 45 6C JSR $6C45;从FTPLINK获取要进行的操作,供子程序6E18用
$6D21: 85 40 STA $40
$6D23: 20 45 6C JSR $6C45;(接收一个字节并?)获得本次传输的大小
$6D26: 8D 0F 09 STA $090F
$6D29: 85 80 STA $80
$6D2B: 20 45 6C JSR $6C45
$6D2E: 8D 10 09 STA $0910
$6D31: 85 81 STA $81
$6D33: 05 80 ORA $80
$6D35: F0 43 BEQ $6D7A;大小为零,结束
$6D37: A9 00 LDA #$00
$6D39: 85 82 STA $82
$6D3B: A9 20 LDA #$20
$6D3D: 85 83 STA $83
$6D3F: A9 00 LDA #$00
$6D41: 85 84 STA $84
$6D43: 20 45 6C JSR $6C45
$6D46: A0 00 LDY #$00
$6D48: 91 82 STA ($82),Y
$6D4A: 45 84 EOR $84
$6D4C: 85 84 STA $84
$6D4E: E6 82 INC $82
$6D50: D0 02 BNE $6D54
$6D52: E6 83 INC $83
$6D54: A5 80 LDA $80
$6D56: D0 02 BNE $6D5A
$6D58: C6 81 DEC $81
$6D5A: C6 80 DEC $80
$6D5C: A5 80 LDA $80
$6D5E: 05 81 ORA $81
$6D60: D0 E1 BNE $6D43
$6D62: 20 45 6C JSR $6C45
$6D65: 45 84 EOR $84
$6D67: F0 03 BEQ $6D6C;如果条件满足,说明WQX的异或值与FTPLINK的相同,否则需重新传输
$6D69: A9 58 LDA #$58
$6D6B: 2C A9 4F BIT $4FA9;技巧:如果上面BEQ的条件满足则LDA #$4F(成功:O),否则LDA #$58(失败:X)
$6D6E: 85 43 STA $43
$6D70: 20 0B 6C JSR $6C0B;(发送一个字节)将结果告诉FTPLINK
$6D73: 20 7B 6C JSR $6C7B
$6D76: A5 43 LDA $43
$6D78: C9 4F CMP #$4F
$6D7A: 60 RTS

;结束通讯,发送"E"
$6D7B: A9 45 LDA #$45
$6D7D: 20 0B 6C JSR $6C0B;(发送一个字节)
$6D80: 58 CLI
$6D81: 20 F0 6B JSR $6BF0
$6D84: A6 41 LDX $41
$6D86: 9A TXS
$6D87: 60 RTS

;显示各种错误信息
错误代码:
1.上传时连接状态错
2.上传时握手信号错
3.上传时结束信号错
4.无法进入目录
5.无法创建文件
6.无法打开文件
7.写文件出错
8.读文件出错
9.下载时校验错(这个没有用到,只是简单的异或校检,错了就重新传)
A.发送字节时出错
$6D88: 58 CLI
$6D89: 48 PHA
$6D8A: 00 2A C7 INT $C72A
$6D8D: 68 PLA
$6D8E: 0A ASL
$6D8F: AA TAX
$6D90: BD 60 6F LDA $6F60,X
$6D93: 85 80 STA $80
$6D95: BD 61 6F LDA $6F61,X
$6D98: 85 81 STA $81
$6D9A: A0 00 LDY #$00
$6D9C: B1 80 LDA ($80),Y
$6D9E: 99 E8 02 STA $02E8,Y
$6DA1: F0 03 BEQ $6DA6
$6DA3: C8 INY
$6DA4: D0 F6 BNE $6D9E
$6DA6: A9 FF LDA #$FF
$6DA8: 8D AF 03 STA $03AF
$6DAB: A9 FF LDA #$FF
$6DAD: 8D B0 03 STA $03B0
$6DB0: 00 19 C7 INT $C719
$6DB3: 00 0A C0 INT $C00A
$6DB6: 4C 81 6D JMP $6D81

;显示"-/"
$6DB9: E6 42 INC $42
$6DBB: A9 F8 LDA #$F8
$6DBD: 85 80 STA $80
$6DCF: A9 6D LDA #$6D
$6DC1: 85 81 STA $81
$6DC3: A5 42 LDA $42
$6DC5: 29 03 AND #$03
$6DC7: 0A ASL
$6DC8: 0A ASL
$6DC9: 0A ASL
$6DCA: 18 CLC
$6DCB: 65 80 ADC $80
$6DCD: 85 80 STA $80
$6DCF: 90 02 BCC $6DD3
$6DD1: E6 81 INC $81
$6DD3: A9 9E LDA #$9E
$6DD5: 85 82 STA $82
$6DD7: A9 1C LDA #$1C
$6DD9: 85 83 STA $83
$6DDB: A2 08 LDX #$08
$6DDD: A0 00 LDY #$00
$6DDF: B1 80 LDA ($80),Y
$6DE1: 91 82 STA ($82),Y
$6DE3: E6 80 INC $80
$6DE5: D0 02 BNE $6DE9
$6DE7: E6 81 INC $81
$6DE9: 18 CLC
$6DEA: A5 82 LDA $82
$6DEC: 69 14 ADC #$14
$6DEE: 85 82 STA $82
$6DF0: 90 02 BCC $6DF4
$6DF2: E6 83 INC $83
$6DF4: CA DEX
$6DF5: D0 E8 BNE $6DDF
$6DF7: 60 RTS

;显示"-/"用
$6DF8: 00 00 00 FF
$6DFC: FF 00 00 00
$6E00: C0 60 30 18
$6E04: 0C 06 03 01
$6E08: 18 18 18 18
$6E0C: 18 18 18 18
$6E10: 01 03 06 0C
$6E14: 18 30 60 C0

;CASE(由$40的内容控制)
$6E18: A9 00 LDA #$00
$6E1A: 8D F6 03 STA $03F6
$6E1D: 8D 01 04 STA $0401
$6E20: A5 40 LDA $40
$6E22: 0A ASL
$6E23: AA TAX
$6E24: BD 31 6E LDA $6E31,X
$6E27: 85 80 STA $80
$6E29: BD 32 6E LDA $6E32,X
$6E2C:85 81 STA $81
$6E2E: 6C 80 00 JMP ($0080)

;TABLE,子程序6E18用
$6E31: 5C 6E 43 6E
$6E35: 5F 6E 82 6E
$6E39: E6 6E F9 6E
$6E3D: 7B 6D A9 6E
$6E41: C4 6E


;可能是显示从FTPLINK接收的"开始通讯"
$6E43: A2 64 LDX #$64
$6E45: BD FF 1F LDA $1FFF,X
$6E48: 9D BF 02 STA $02BF,X
$6E4B: CA DEX
$6E4C: D0 F7 BNE $6E45
$6E4E: A9 FF LDA #$FF
$6E50: 8D AF 03 STA $03AF
$6E53: A9 FF LDA #$FF
$6E55: 8D B0 03 STA $03B0
$6E58: 00 19 C7 INT $C719
$6E5B: 60 RTS

;执行从FTPLINK下载的程序
$6E5C: 4C 00 20 JMP $2000

;下载时进入或创建目录用
$6E5F: A2 39 LDX #$39
$6E61: BD FF 1F LDA $1FFF,X
$6E64: 9D D5 08 STA $08D5,X
$6E67: CA DEX
$6E68: D0 F7 BNE $6E61
$6E6A: 00 0D 05 INT $050D
$6E6D: B0 01 BCS $6E70
$6E6F: 60 RTS
$6E70: AD 15 09 LDA $0915
$6E73: C9 02 CMP #$02
$6E75: F0 05 BEQ $6E7C
$6E77: A9 04 LDA #$04;无法进入目录
$6E79: 4C 88 6D JMP $6D88
$6E7C: 00 0B 05 INT $050B
$6E7F: 90 DE BCC $6E5F
$6E81: 60 RTS

;下载时创建文件用,缓冲的前两个字节为文件属性
$6E82: A2 39 LDX #$39
$6E84: BD 01 20 LDA $2001,X
$6E87: 9D D5 08 STA $08D5,X
$6E8A: CA DEX
$6E8B: D0 F7 BNE $6E84
$6E8D: AD 00 20 LDA $2000
$6E90: 8D 13 09 STA $0913
$6E93: AD 01 20 LDA $2001
$6E96: 8D 14 09 STA $0914
$6E99: A9 70 LDA #$70
$6E9B: 8D 12 09 STA $0912
$6E9E: 00 14 05 INT $0514
$6EA1: 90 05 BCC $6EA8
$6EA3: A9 05 LDA #$05;无法创建文件
$6EA5: 4C 88 6D JMP $6D88
$6EA8: 60 RTS

;上传时打开文件
$6EA9: A2 39 LDX #$39
$6EAB: BD 01 20 LDA $2001,X
$6EAE: 9D D5 08 STA $08D5,X
$6EB1: CA DEX
$6EB2: D0 F7 BNE $6EAB
$6EB4: A9 80 LDA #$80
$6EB6: 8D 12 09 STA $0912
$6EB9: 00 14 05 INT $0514
$6EBC: 90 05 BCC $6EC3
$6EBE: A9 06 LDA #$06;无法打开文件
$6EC0: 4C 88 6D JMP $6D88
$6EC3: 60 RTS

;读文件并上传,前两个字节为大小
$6EC4: A9 00 LDA #$00
$6EC6: 85 DD STA $DD
$6EC8: A9 20 LDA #$20
$6ECA: 85 DE STA $DE
$6ECC: AD 00 20 LDA $2000
$6ECF: 8D 0F 09 STA $090F
$6ED2: AD 01 20 LDA $2001
$6ED5: 8D 10 09 STA $0910
$6ED8: 00 15 05 INT $0515
$6EDB: 90 05 BCC $6EE2
$6EDD: A9 08 LDA #$08;读文件出错
$6EDF: 4C 88 6D JMP $6D88
$6EE2: 20 97 6C JSR $6C97;(上传缓冲区的数据)
$6EE5: 60 RTS

;下载时写文件用
$6EE6: A9 00 LDA #$00
$6EE8: 85 DD STA $DD
$6EEA: A9 20 LDA #$20
$6EEC: 85 DE STA $DE
$6EEE: 00 17 05 INT $0517
$6EF1: 90 05 BCC $6EF8
$6EF3: A9 07 LDA #$07;写文件出错
$6EF5: 4C 88 6D JMP $6D88
$6EF8: 60 RTS

;关闭文件
$6EF9: 00 16 05 INT $0516
$6EFC: 60 RTS

;程序入口
$6EFD: BA TSX
$6EFE: 86 41 STX $41
$6F00: 00 22 05 INT $0522
$6F03: 00 2A C7 INT $C72A
$6F06: A2 0A LDX #$0A
$6F08: BD 55 6F LDA $6F55,X
$6F0B: 9D EC 02 STA $02EC,X
$6F0E: CA DEX
$6F0F: D0 F7 BNE $6F08
$6F11: A9 FF LDA #$FF
$6F13: 8D AF 03 STA $03AF
$6F16: A9 FF LDA #$FF
$6F18: 8D B0 03 STA $03B0
$6F1B: 00 19 C7 INT $C719
$6F1E: 20 66 6B JSR $6B66;(打开串口通讯)
$6F21: 20 64 6C JSR $6C64;寻找通讯设备
$6F24: 78 SEI
$6F25: 20 13 6D JSR $6D13;(获取操作指令及接收数据到缓冲)成功则零标志被设置
(代号存于$40
0.执行从FTPLINK下载的代码
1.显示下载的文字
2.下载时进入或创建目录
3.下载时创建文件
4.下载时写文件
5.关闭文件
6.结束通讯
7.上传时打开文件
8.上传时读文件并上传
$6F28: D0 0A BNE $6F34;若上一步操作失败则跳转
$6F2A: 58 CLI
$6F2B: 20 18 6E JSR $6E18;(CASE)
$6F2E: 20 B9 6D JSR $6DB9;(显示"-/")
$6F31: 4C 24 6F JMP $6F24
$6F34: A9 00 LDA #$00;因子程序$6D13失败而暂停,等待重新开始的信号$CF,$CB
$6F36: 85 44 STA $44
$6F38: 20 27 6B JSR $6B27
$6F3B: 20 45 6C JSR $6C45
$6F3E: C9 CF CMP #$CF
$6F40: D0 07 BNE $6F49
$6F42: A9 01 LDA #$01
$6F44: 85 44 STA $44
$6F46: 4C 38 6F JMP $6F38
$6F49: C9 CB CMP #$CB
$6F4B: D0 E7 BNE $6F34
$6F4D: A5 44 LDA $44
$6F4F: C9 01 CMP #$01
$6F51: D0 E1 BNE $6F34
$6F53: 4C 24 6F JMP $6F24