ssi263: update the myst test code

another Vince is helping test on real hardware, and my simplified
player was too simple and not working despite being fine in AppleWin

music/ssi-263/myst.s

@@ -16,14 +16,30 @@ speech_test:
 	lda	#4			; assume slot #4 for now
 	jsr	detect_ssi263
 
+	lda	#'S'+$80
+	sta	$400
+	sta	$401
+	lda	#'I'+$80
+	sta	$402
+	lda	#':'+$80
+	sta	$403
+
 	lda	irq_count
-	clc
-	adc	#'A'			; hack to show if detected or not
-	sta	$400			; (B is detected, A is not)
+	beq	not_found
+
+	lda	#'Y'+$80		; hack to show if detected or not
+	sta	$405			; (B is detected, A is not)
 
 	lda	#4			; assume slot #4 for now
 	jsr	ssi263_speech_init
 
+	jmp	speech_loop
+
+not_found:
+	lda	#'N'+$80
+	sta	$405
+	jmp	not_found
+
 
 speech_loop:
 
@@ -38,7 +54,6 @@ speech_loop:
 
 	jsr	wait_until_keypress
 
-
 	lda	#<myst_starry
 	sta	SPEECH_PTRL
 	lda	#>myst_starry
@@ -93,10 +108,10 @@ speech_loop:
 
 
 
-
-
 	jmp	speech_loop
 
+
+
 wait_until_keypress:
 
 	lda	KEYPRESS

music/ssi-263/ssi263_simple_speech.s

@@ -37,29 +37,6 @@ ssi263_speech_init:
 	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
-
 	cli				; enable interrupts
 
 	rts
@@ -135,7 +112,7 @@ ssi263_speech_irq:
 	tya
 	pha			; save Y
 
-	inc	$0404		; irq indicator on screen
+	inc	$0408		; irq indicator on screen
 
 	; be sure it was a 6522#2 interrupt
 	ldx	#VIA6522_IFR2
@@ -165,6 +142,28 @@ not_end:
 	lda	#$ff
 	sta	speech_playing
 
+	; 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
+
 
 	ldy	#$00
 	; Get the next data

music/ssi-263/ssi263_speech.s

@@ -68,7 +68,7 @@ ssi263_speak:
 	ldx	#VIA6522_PCR2
 	jsr	ssi263_write_chip
 
-	; Se transitioned inflection by setting value while toggling CTL
+	; Set transitioned inflection by setting value while toggling CTL
 
 	lda	#SSI263_CAA_CTL
 	ldx	#SSI263_CAA