Posted By
Fuzzweed
on 2024-12-22
08:04:51
|  Re: oh no. My sample player works in yape but not on hardware
better timer and it sounds so much better in yape. so that is a huge improvement.
BUT
its still not working on my C16 (6502,64k).......???????
lda #$40
sta $FF00
ldy #$00
lda #$00
sta $FF01
.read_losample
lda (Sample_LSB),y
and #$0f
ora #$20
tax
-
lda $ff09
bit bitcheck ;;;;;;=#$08 bit 3, timer 1
beq -
sta $FF09
stx volume
.read_hisample
lda (Sample_LSB),y
lsr
lsr
lsr
lsr
ora #$20
tax
-
lda $ff09
bit bitcheck ;;;;;;=#$08 bit 3, timer 1
beq -
sta $FF09
stx volume
inc Sample_LSB
bne +
inc Sample_MSB
+
dec sample_counter_LSB
bne +
lda sample_counter_MSB
ora sample_counter_LSB
beq ++
dec sample_counter_MSB
+
jmp .read_losample
++
MORE:
so heres the sound setup:
lda #$fd
sta voice1lo
lda #$fe
sta voice2lo
lda voice1hi
and #$fc
ora #$03
sta voice1hi
lda voice2hi
and #$fc
ora #$03
sta voice2hi
lda #$BF
sta volume
lda #$3F
sta volume
In yape machine = plus4. it seems to work 100%
In yape machine = c16+hannes expansion. i works sometimes, but occasionally it is clipped, mising first seconds
in real c16 expanded it is complete silence
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