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Merge pull request #57 from feilipu/master

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hbios - z180 - tidy prt0 setting
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Wayne Warthen
2019-11-14 11:35:41 -08:00
committed by GitHub
parent b7ad90c245 294b42f5a4
commit 18f78cfd3e
1 changed files with 4 additions and 9 deletions
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Source/HBIOS/hbios.asm
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@@ -1247,16 +1247,11 @@ HB_CPU1:
; SETUP PERIODIC TIMER INTERRUPT ON TIMER 0
; LD HL,CPUOSC/TICKSPERSEC/20-1 ; 50HZ = 18432000 / 50 / 20
LD HL,(CPUKHZ) ; 50HZ = 18432000 / 20 / 50 / X, SO X = CPU KHZ
LD B,0 ; 16-BIT I/O ADDRESS
LD C,Z180_TMDR0L ; INITIALIZE TIMER 0 DATA REGISTER
OUT (C),L
INC C
OUT (C),H
DEC HL ; RELOAD OCCURS *AFTER* ZERO
LD C,Z180_RLDR0L ; INITIALIZE TIMER 0 RELOAD REGISTER
OUT (C),L
INC C
OUT (C),H
OUT0 (Z180_TMDR0L),L ; INITIALIZE TIMER 0 DATA REGISTER
OUT0 (Z180_TMDR0H),H
OUT0 (Z180_RLDR0L),L ; INITIALIZE TIMER 0 RELOAD REGISTER
OUT0 (Z180_RLDR0H),H
LD A,%00010001 ; ENABLE TIMER0 INT AND DOWN COUNTING
OUT0 (Z180_TCR),A
;