$40-$44/64-68:  Zwischenspeicher fuer diverse Zwecke

  $40-$41:  Zeiger fuer div. Zwecke (z.B. jmp ($0040), ...)
  $40-$42:  Speicher fuer ASCII-Zahl beim Umwandeln in 2-Byte
  $40-$44:  Zwischenspeicher fuer BAM-Erzeugung
  $41-$42:  Laenge einer REL-Datei (ohne Super-Side-Sektoren)
  $42-$43:  Zeiger fuer div. Zwecke (z.B. Pufferinhalt kopieren)
  $43    :  Anzahl Datenbloecke im letzten Side-Sektor *2
  $44    :  Zwischenspeicher fuer Side-Sektor-Nummern
            Anzahl Side-Sektoren

Einsprung von $8049, $8951, $8A9C, $8BF7

ROM-Reference:

 ADC $40    : $8966 $913E
 DEC $40    : $917D $9191 $B69C $B6B9
 INC $40    : $8968 $AF6F $AF91
 JMP ($0040): $8049 $8951 $8A9C $8BF7
 LDA $40    : $896D $8A15 $8A1B $8AEC $8CF2 $90C6 $9291 $942D
 LDA $40,X  : $B4D4
 LDA ($40),Y: $8954 $9DF2
 LDX $40    : $92C7 $AEF5
 LDY $40    : $92CF
 LDY $40,X  : $8B03
 LSR $40    : $8CE8
 ORA $40    : $83AE $83B6
 ROL $40    : $8A10 $B4C6
 SBC $40    : $8D25
 STA $40    : $8042 $82A4 $83A3 $83B0 $8632 $8939 $8A0D $8A9A $8AD2 $8AF1
              $8BE8 $8CE6 $8D0E $90B4 $9138 $915C $92D7 $93EC $9422 $9DE1
              $9E02 $B4B0 $B66D
 STX $40    : $92B6 $ABCA

 ADC $41    : $9E8E
 BIT $41    : $9F30
 CMP $41    : $9D1A $A376
 LDA $41    : $8971 $8AE8 $99EE
 LDX $41    : $A33D
 ROL $41    : $B4C8
 STA $41    : $8047 $893E $8A95 $8AD4 $8AEE $8BEF $99DE $9D11 $9DE8 $9DFE
              $9E90 $9F2C $B4B2
 STX $41    : $A331

 INC $42    : $9E94
 LDA $42    : $99F3 $A339
 LDA ($42),Y: $8DDF $8DF7 $945D
 LDX $42    : $9CFF
 LDY $42    : $9AD6
 ROL $42    : $B4CA
 STA $42    : $8AEA $8DCD $8DE5 $9450 $99E0 $9DE3 $B4B4
 STA ($42),Y: $9DF4
 STX $42    : $9CF7 $9D07 $A333
 STY $42    : $9AB7

 INC $43    : $8B0E
 LDA $43    : $8B16 $9E85 $9EBB
 ROL $43    : $B4CC
 STA $43    : $8AD6 $8DDB $8DF3 $9459 $99E7 $9A0A $9DED $A327 $A345 $B4B6

 INC $44    : $99DA
 LDA $44    : $9E8B
 LDY $44    : $9EAC
 ROL $44    : $B4CE
 STA $44    : $A32D $A351 $B4B8
 STX $44    : $99D3

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