mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-11-16 08:05:31 +00:00
256 lines
4.0 KiB
ArmAsm
256 lines
4.0 KiB
ArmAsm
; Simple speech routine for ssi-263
|
|
|
|
; to save space we only change the Phoneme/Delay each time, we don't
|
|
; mess with the other registers
|
|
|
|
;========================
|
|
; ssi263_write_chip
|
|
;========================
|
|
ssi263_write_chip:
|
|
wc_smc1:
|
|
sta $C000,X
|
|
rts
|
|
|
|
;========================
|
|
; read_chip
|
|
;========================
|
|
ssi263_read_chip:
|
|
rc_smc1:
|
|
lda $C000,X
|
|
rts
|
|
|
|
|
|
;========================
|
|
; ssi263_speech_init
|
|
;========================
|
|
; A = slot number of mockingboard
|
|
ssi263_speech_init:
|
|
sei ; disable interrupts
|
|
|
|
and #$7
|
|
ora #$c0 ; turn slot number into address
|
|
sta wc_smc1+2 ; update the read/write routines
|
|
sta rc_smc1+2
|
|
|
|
lda #<ssi263_speech_irq ; point IRQ handler to our code
|
|
sta $3fe
|
|
lda #>ssi263_speech_irq
|
|
sta $3ff
|
|
|
|
|
|
; set defaults
|
|
|
|
; filter frequency
|
|
lda #$E9
|
|
ldx #SSI263_F
|
|
jsr ssi263_write_chip
|
|
|
|
; control / articulation/ amplitude
|
|
lda #$5C
|
|
ldx #SSI263_CAA
|
|
jsr ssi263_write_chip
|
|
|
|
; rate/inflection
|
|
lda #$A8
|
|
ldx #SSI263_RI
|
|
jsr ssi263_write_chip
|
|
|
|
; inflection
|
|
lda #$50
|
|
ldx #SSI263_I
|
|
jsr ssi263_write_chip
|
|
|
|
; Set the busy flag
|
|
lda #$00
|
|
sta speech_busy
|
|
|
|
|
|
cli ; enable interrupts
|
|
|
|
rts
|
|
|
|
|
|
;============================
|
|
; ssi263_speech_shutdown
|
|
;============================
|
|
|
|
ssi263_speech_shutdown:
|
|
sei
|
|
|
|
rts
|
|
|
|
|
|
|
|
;=========================
|
|
; ssi263_speak
|
|
;=========================
|
|
; pointer to data in SPEECH_PTRL/H
|
|
|
|
ssi263_speak:
|
|
|
|
sei ; disable interrupts
|
|
|
|
|
|
; Set the busy flag
|
|
lda #$FF
|
|
sta speech_busy
|
|
|
|
; Set peripheral control register to recognize the signal from the
|
|
; speech chip.
|
|
lda #(VIA6522_PCR2_CA2_LOW|VIA6522_PCR2_CA1_NEG)
|
|
ldx #VIA6522_PCR2
|
|
jsr ssi263_write_chip
|
|
|
|
; Set transitioned inflection by setting value while toggling CTL
|
|
|
|
lda #SSI263_CAA_CTL
|
|
ldx #SSI263_CAA
|
|
jsr ssi263_write_chip
|
|
|
|
; Set transitioned inflection mode in register 0
|
|
lda #SSI263_DRP_TRANSITIONED_INFLECTION
|
|
ldx #SSI263_DRP
|
|
jsr ssi263_write_chip
|
|
|
|
; Lower control bit
|
|
lda #$70 ; also T=7
|
|
ldx #SSI263_CAA
|
|
jsr ssi263_write_chip
|
|
|
|
; Enable 6522 interrupts
|
|
lda #(VIA6522_IER2_SET|VIA6522_IER2_CA1)
|
|
ldx #VIA6522_IER2
|
|
jsr ssi263_write_chip
|
|
|
|
cli ; re-enable interrupts
|
|
|
|
rts
|
|
|
|
|
|
;====================
|
|
; speech interrupt
|
|
;====================
|
|
ssi263_speech_irq:
|
|
|
|
php ; save flags
|
|
cld
|
|
|
|
pha ; save A
|
|
txa
|
|
pha ; save X
|
|
tya
|
|
pha ; save Y
|
|
|
|
; inc $0404 ; irq indicator on screen
|
|
|
|
; be sure it was a 6522#2 interrupt
|
|
ldx #VIA6522_IFR2
|
|
jsr ssi263_read_chip
|
|
bmi have_interrupt
|
|
|
|
; wasn't us, return to caller
|
|
; this assumes we can handle multiple interrupt sources
|
|
|
|
jmp end_interrupt
|
|
|
|
have_interrupt:
|
|
; Clear the 6522#2 CA interrupt flag
|
|
lda #VIA6522_IFR2_CA1
|
|
ldx #VIA6522_IFR2
|
|
jsr ssi263_write_chip
|
|
|
|
; Check if done with speech
|
|
ldy #0
|
|
lda (SPEECH_PTRL),Y
|
|
cmp #$ff
|
|
beq speech_end
|
|
|
|
not_end:
|
|
|
|
; Set the speech playing flag
|
|
lda #$ff
|
|
sta speech_playing
|
|
|
|
|
|
; IS THIS NEEDED?
|
|
|
|
lda #$E8
|
|
ldx #SSI263_F ; duration/phoneme
|
|
jsr ssi263_write_chip
|
|
|
|
lda #$7F
|
|
ldx #SSI263_CAA ; duration/phoneme
|
|
jsr ssi263_write_chip
|
|
|
|
lda #$A8
|
|
ldx #SSI263_RI ; duration/phoneme
|
|
jsr ssi263_write_chip
|
|
|
|
lda #$6F
|
|
ldx #SSI263_I ; duration/phoneme
|
|
jsr ssi263_write_chip
|
|
|
|
ldy #$00
|
|
; Get the next data
|
|
lda (SPEECH_PTRL),Y
|
|
ldx #SSI263_DRP ; duration/phoneme
|
|
jsr ssi263_write_chip
|
|
|
|
; Next data (inc 16 bit)
|
|
inc SPEECH_PTRL
|
|
bne no_oflo
|
|
inc SPEECH_PTRH
|
|
no_oflo:
|
|
|
|
; Finish the interrupt handler
|
|
jmp end_interrupt
|
|
|
|
speech_end:
|
|
|
|
; If at the end, turn everything off
|
|
|
|
; Toggle CTL while DR set to disable A/!R
|
|
|
|
lda #SSI263_CAA_CTL
|
|
ldx #SSI263_CAA
|
|
jsr ssi263_write_chip
|
|
|
|
lda #SSI263_DRP_DISABLE_AR
|
|
ldx #SSI263_DRP
|
|
jsr ssi263_write_chip
|
|
|
|
; Zero amplitude
|
|
lda #$70
|
|
ldx #SSI263_CAA
|
|
jsr ssi263_write_chip
|
|
|
|
; Clear busy and playing flags
|
|
lda #$00
|
|
sta speech_busy
|
|
sta speech_playing
|
|
|
|
; Disable interrupt in 6522
|
|
lda #VIA6522_IER2_CA1
|
|
ldx #VIA6522_IER2
|
|
jsr ssi263_write_chip
|
|
|
|
end_interrupt:
|
|
|
|
pla
|
|
tay ; restore Y
|
|
pla
|
|
tax ; restore X
|
|
|
|
pla ; restore A
|
|
|
|
interrupt_smc:
|
|
lda $45 ; restore A (II+/IIe)
|
|
|
|
plp ; restore flags
|
|
|
|
rti ; return from interrupt
|
|
|
|
speech_busy: .byte $00
|
|
speech_playing: .byte $00
|
|
|