$4E-$52/78-82:   Temporary storage for FLPT value

Kernal-Reference:

 LDA $4E     : $B3FA
     ($4E),Y : $B40B $B411 $B429 $B42E $B614
 ORA $4E     : $B608
 STA $4E     : $B3ED $B404 $B43C $B5EE
     ($4E),Y : $B452 $B456 $B45A $B45E $B462 $B630 $B638
 STY $4E     : $B532

 LDA $4F     : $B3F7 $B606
 STA $4F     : $B407 $B43F
 STX $4F     : $B5F0
 STY $4F     : $B3EF $B530

 CMP ($50),Y : $B703
 LDA $50     : $AA59 $B663 $B712
     ($50),Y : $AA71 $AA76 $AA7B $B708
 SBC ($50),Y : $B730 $B753
 STA $50     : $AA68 $B76E
 STX $50     : $B479

 LDY $51     : $AA5B $B665 $B714
 STA $51     : $B771
 STY $51     : $AA6A $B47B

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