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FF07: ??
Used by the routine at FE72.
FF07 AD 95 02 LDA $0295 nonstandard bit timing low byte
FF0A 8D 06 DD STA $DD06 save VIA 2 timer B low byte
FF0D AD 96 02 LDA $0296 nonstandard bit timing high byte
FF10 8D 07 DD STA $DD07 save VIA 2 timer B high byte
FF13 A9 11 LDA #$11 set timer B single shot, start timer B
FF15 8D 0F DD STA $DD0F save VIA 2 CRB
FF18 A9 12 LDA #$12
FF1A 4D A1 02 EOR $02A1 EOR with the RS-232 interrupt enable byte
FF1D 8D A1 02 STA $02A1 save the RS-232 interrupt enable byte
FF20 A9 FF LDA #$FF
FF22 8D 06 DD STA $DD06 save VIA 2 timer B low byte
FF25 8D 07 DD STA $DD07 save VIA 2 timer B high byte
FF28 AE 98 02 LDX $0298
FF2B 86 A8 STX $A8
FF2D 60 RTS
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