$F409/62473:   Open RS-232

Jump from $F388:

F409: 20 83 F4  JSR $F483
F40C: 8C 97 02  STY $0297

Jump from $F41B:

F40F: C4 B7     CPY $B7
F411: F0 0A     BEQ $F41D
F413: B1 BB     LDA ($BB),Y
F415: 99 93 02  STA $0293,Y
F418: C8        INY
F419: C0 04     CPY #$04
F41B: D0 F2     BNE $F40F

Jump from $F411:

F41D: 20 4A EF  JSR $EF4A
F420: 8E 98 02  STX $0298
F423: AD 93 02  LDA $0293
F426: 29 0F     AND #$0F
F428: F0 1C     BEQ $F446
F42A: 0A        ASL
F42B: AA        TAX
F42C: AD A6 02  LDA $02A6
F42F: D0 09     BNE $F43A
F431: BC C1 FE  LDY $FEC1,X
F434: BD C0 FE  LDA $FEC0,X
F437: 4C 40 F4  JMP $F440

Jump from $F42F:

F43A: BC EB E4  LDY $E4EB,X
F43D: BD EA E4  LDA $E4EA,X

Jump from $F437:

F440: 8C 96 02  STY $0296
F443: 8D 95 02  STA $0295

Jump from $F428:

F446: AD 95 02  LDA $0295
F449: 0A        ASL
F44A: 20 2E FF  JSR $FF2E
F44D: AD 94 02  LDA $0294
F450: 4A        LSR
F451: 90 09     BCC $F45C
F453: AD 01 DD  LDA $DD01
F456: 0A        ASL
F457: B0 03     BCS $F45C
F459: 20 0D F0  JSR $F00D

Jump from $F451, $F457:

F45C: AD 9B 02  LDA $029B
F45F: 8D 9C 02  STA $029C
F462: AD 9E 02  LDA $029E
F465: 8D 9D 02  STA $029D
F468: 20 27 FE  JSR $FE27
F46B: A5 F8     LDA $F8
F46D: D0 05     BNE $F474
F46F: 88        DEY
F470: 84 F8     STY $F8
F472: 86 F7     STX $F7

Jump from $F46D:

F474: A5 FA     LDA $FA
F476: D0 05     BNE $F47D
F478: 88        DEY
F479: 84 FA     STY $FA
F47B: 86 F9     STX $F9

Jump from $F476, $F2C5:

F47D: 38        SEC
F47E: A9 F0     LDA #$F0
F480: 4C 2D FE  JMP $FE2D

Jump from $F409, $F2AF:

F483: A9 7F     LDA #$7F
F485: 8D 0D DD  STA $DD0D
F488: A9 06     LDA #$06
F48A: 8D 03 DD  STA $DD03
F48D: 8D 01 DD  STA $DD01
F490: A9 04     LDA #$04
F492: 0D 00 DD  ORA $DD00
F495: 8D 00 DD  STA $DD00
F498: A0 00     LDY #$00
F49A: 8C A1 02  STY $02A1
F49D: 60        RTS

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