MirrorRepos/RomWBW
1
0
Fork 1
mirror of https://github.com/wwarthen/RomWBW.git synced 2026-02-06 14:11:48 -06:00
Code Issues Projects Releases Wiki Activity

Misc

Browse Source 
- Update TUNE.COM to mute sound card at end of playback when playing via HBIOS.
- Update SN76489 sound driver to use proper default port addresses.
- Modify Phil's CPU MHz speed rounding function to round up anytime speed in KHz is withing 500 KHz of next MHz increment.
This commit is contained in:
Wayne Warthen
2021-08-17 14:55:17 -07:00
parent 0ef6694526
commit 80ee13e0f4
5 changed files with 30 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
Source/HBIOS/hbios.asm
View File

@@ -5174,15 +5174,15 @@ HB_CPUSPD1:
SLA L
RL H
;
LD (CB_CPUKHZ),HL
LD DE,1000
CALL DIV16
LD DE,980 ; ROUND MHZ UP
XOR A ; IF WITHIN 20HZ
SBC HL,DE
CCF
ADC A,C
LD (CB_CPUMHZ),A
LD (CB_CPUKHZ),HL ; HL=CPU SPEED IN KHZ
LD DE,1000 ; SET UP TO DIV BY 1000 FOR MHZ
CALL DIV16 ; BC=CPU MHZ, HL=REMAINDER
LD DE,500 ; SET UP TO ROUND UP
XOR A ; IF WITHIN 500 KHZ
SBC HL,DE ; REMAINDER - 500
CCF ; COMPLEMENT CF
ADC A,C ; C -> A; ADD CF FOR ROUNDING
LD (CB_CPUMHZ),A ; SAVE IT
;
RET
;

10
Source/HBIOS/sn76489.asm
View File

@@ -13,10 +13,12 @@
;======================================================================
;
SN76489_PORT_LEFT .EQU $FC ; PORTS FOR ACCESSING THE SN76489 CHIP (LEFT)
SN76489_PORT_RIGHT .EQU $F8 ; PORTS FOR ACCESSING THE SN76489 CHIP (RIGHT)
;SN76489_PORT_LEFT .EQU $C7 ; PORTS FOR ACCESSING THE SN76489 CHIP (LEFT)
;SN76489_PORT_RIGHT .EQU $C8 ; PORTS FOR ACCESSING THE SN76489 CHIP (RIGHT)
SN76489_PORT_LEFT .EQU $FF ; PORTS FOR ACCESSING THE SN76489 CHIP (LEFT)
SN76489_PORT_RIGHT .EQU $FB ; PORTS FOR ACCESSING THE SN76489 CHIP (RIGHT)
;SN76489_PORT_LEFT .EQU $FC ; PORTS FOR ACCESSING THE SN76489 CHIP (LEFT)
;SN76489_PORT_RIGHT .EQU $F8 ; PORTS FOR ACCESSING THE SN76489 CHIP (RIGHT)
;;SN76489_PORT_LEFT .EQU $C7 ; PORTS FOR ACCESSING THE SN76489 CHIP (LEFT)
;;SN76489_PORT_RIGHT .EQU $C8 ; PORTS FOR ACCESSING THE SN76489 CHIP (RIGHT)
SN7_IDAT .EQU 0
SN7_TONECNT .EQU 3 ; COUNT NUMBER OF TONE CHANNELS
SN7_NOISECNT .EQU 1 ; COUNT NUMBER OF NOISE CHANNELS