Interrupt Routine

5924: 5E       LR   (IS--),A
5925: 20 98    LI   $98			;<- faster timer interrupt value ( F8 table: 91)
5927: BF       OUTS $0F
5928: 4B       LR   A,HL
5929: 5E       LR   (IS--),A
592A: 4A       LR   A,HU
592B: 5E       LR   (IS--),A
592C: 49       LR   A,J
592D: 5C       LR   (IS),A
592E: 1E       LR   J,W
592F: 0A       LR   A,IS
5930: 13       SL   1
5931: 13       SL   1
5932: E9       XS   J
5933: 59       LR   J,A
5934: 62       LISU $02
5935: A0       INS  $00			;<- get in/out port 0 (port is inverted)
5936: 21 08    NI   $08			;<- AND 8 (bit 3)
5938: 94 04    BNZ  $593D		;Branch if not ZERO
593A: 20 4F    LI   $4F			;<- original Boris rev1 timer value (F8 table: 183)
593C: BF       OUTS $0F			;<- to 3853 chip
593D: A0       INS  $00
593E: 1F       INC
593F: 21 07    NI   $07
5941: 5B       LR   HL,A
5942: 2C       XDC
5943: 29 5D E6 JMP  $5DE6
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