$A0-$A2/160-162:   Real-time jiffy Clock

   Updated by IRQ Interrupt approx every 1/60 of Second

   Update Routine is at $F69B

Kernal-Reference:

 BIT $00A0   : $AFE8
 INC $A0     : $F6A5
 LDA $A0     : $F6B0
 LDY $A0     : $F6E2
 STX $A0     : $F6B6
 STY $A0     : $F6E9

 CMP $A1     : $E4E7
 INC $A1     : $F6A1
 LDA $A1     : $F6AC $F761
 LDX $A1     : $F6E0
 STX $A1     : $F6B8 $F6E7

 BIT $00A2   : $A908
 INC $A2     : $F69D
 LDA $A2     : $F6DE
 STA $A2     : $F6E5
 STX $A2     : $F6BA

    Previous Page / Next Page