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patch
Dean Netherton 6 years ago
parent
commit
625e696f68
  1. 12
      Source/HBIOS/ay38910.asm

12
Source/HBIOS/ay38910.asm

@ -20,7 +20,7 @@ AY_RIN .EQU AY_RSEL
AY_ACR .EQU N8_DEFACR
#ENDIF
;
#IF (AYMODE == AYMODE_RCZ80)
#IF (AYMODE == AYMODE_RCZ80)
AY_RSEL .EQU $D8
AY_RDAT .EQU $D0
AY_RIN .EQU AY_RSEL+AY_RCSND
@ -71,7 +71,7 @@ AY_NOISECNT .EQU 1 ; COUNT NUMBER OF NOISE CHANNELS
;
AY_PHICLK .EQU 3579545 ; MSX NTSC COLOUR BURST FREQ = 315/88
;AY_PHICLK .EQU 3500000 ; ZX SPECTRUM 3.5MHZ
;AY_PHICLK .EQU 4000000 ; RETROBREW SCB-SCG
;AY_PHICLK .EQU 4000000 ; RETROBREW SCB-SCG
AY_CLKDIV .EQU 2
AY_CLK .EQU AY_PHICLK / AY_CLKDIV
AY_RATIO .EQU AY_CLK * 100 / 16
@ -99,7 +99,7 @@ AY38910_INIT:
#ENDIF
;
LD DE,(AY_R2CHBP*256)+$55 ; SIMPLE HARDWARE PROBE
CALL AY_WRTPSG ; WRITE AND
CALL AY_WRTPSG ; WRITE AND
CALL AY_RDPSG ; READ TO A
LD A,$55 ; SOUND CHANNEL
CP E ; REGISTER
@ -107,7 +107,7 @@ AY38910_INIT:
;
CALL PRTSTRD \ .TEXT " NOT PRESENT$"
;
LD A,$FF ; UNSUCCESSFULL INIT
LD A,$FF ; UNSUCCESSFULL INIT
RET
;
AY_FND: LD IY, AY_IDAT ; SETUP FUNCTION TABLE
@ -275,7 +275,7 @@ AY_PLAY:
INC A
JR Z, AY_PLAY1 ; PERIOD IS TOO LARGE, UNABLE TO PLAY
;
PUSH HL
PUSH HL
PUSH DE
LD A,D ; LIMIT CHANNEL 0-2
AND $3 ; AND INDEX TO THE
@ -460,7 +460,7 @@ AYT_REGWR .DB "\r\nOUT AY-3-8910 $"
#ENDIF
;
;======================================================================
; BBC MICRO QUARTER TONE FREQUENCY TABLE
; BBC MICRO QUARTER TONE FREQUENCY TABLE
;======================================================================
;
AY3NOTETBL:

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