     $EA31/59953:   Main IRQ Entry Point

    EA31: 20 EA FF  JSR $FFEA
    EA34: A5 CC     LDA $CC
    EA36: D0 29     BNE $EA61
    EA38: C6 CD     DEC $CD
    EA3A: D0 25     BNE $EA61
    EA3C: A9 14     LDA #$14
    EA3E: 85 CD     STA $CD
    EA40: A4 D3     LDY $D3
    EA42: 46 CF     LSR $CF
    EA44: AE 87 02  LDX $0287
    EA47: B1 D1     LDA ($D1),Y
    EA49: B0 11     BCS $EA5C
    EA4B: E6 CF     INC $CF
    EA4D: 85 CE     STA $CE
    EA4F: 20 24 EA  JSR $EA24
    EA52: B1 F3     LDA ($F3),Y
    EA54: 8D 87 02  STA $0287
    EA57: AE 86 02  LDX $0286
    EA5A: A5 CE     LDA $CE

    Jump from $EA49:

    EA5C: 49 80     EOR #$80
    EA5E: 20 1C EA  JSR $EA1C

    Jump from $EA36, $EA3A:

    EA61: A5 01     LDA $01
    EA63: 29 10     AND #$10
    EA65: F0 0A     BEQ $EA71
    EA67: A0 00     LDY #$00
    EA69: 84 C0     STY $C0
    EA6B: A5 01     LDA $01
    EA6D: 09 20     ORA #$20
    EA6F: D0 08     BNE $EA79

    Jump from $EA65:

    EA71: A5 C0     LDA $C0
    EA73: D0 06     BNE $EA7B
    EA75: A5 01     LDA $01
    EA77: 29 1F     AND #$1F

    Jump from $EA6F:

    EA79: 85 01     STA $01

    Jump from $EA73:

    EA7B: 20 87 EA  JSR $EA87
    EA7E: AD 0D DC  LDA $DC0D

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    Kernal-Reference:

     LDA $EA60   : $E3A8