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MisterMSK
Account closed
Registered: Jul 2009
Posts: 37 |
Play a SID in ACME
Hi All,
I wanted to first thank stranger so much for his help with adding a Koala picture into a program. It worked beautify. I am also interested into adding music to the program. I went to code base and they had two examples. I found a few SIDs using Pokefinder and made sure they had a start address of $1000. Anyway, when I tried them I got nothing coming from the good old commodore speakers. I loaded the SID up in a player and it played fine. Just curious if anyone here (which I know the answer to) :) has any experience with adding SID music to some assembler code and can point me into the right direction.
Thanks,
MisterMsk
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Stryyker
Registered: Dec 2001
Posts: 468 |
Can you include example code of what you're doing along with a link to the in HVSC to the tune? |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
first of all make sure you have a correctly working binary... load it, and do something like
10 sys4096
20 sys4096+3:goto20
that should make some (ugly) noise :)
and if that works, then doing
lda #0
jsr $1000
for init, and
jsr $1003
for playing (once per frame) should do the trick |
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MisterMSK
Account closed
Registered: Jul 2009
Posts: 37 |
Each one can be found here and here.
The Sample SID I found was Bubble Trouble.
I'll list the first one for you with the modification.
;--------------------------------
;JCH, DMC, Whatever IRQ music plr (Modified)
;================================
!to "workdarnit.prg",cbm
* = $0810 ;Remember SYS 2064 to enable it
sei
lda #<irq
ldx #>irq
sta $314
stx $315
lda #$1b
ldx #$00
ldy #$7f
sta $d011
stx $d012
sty $dc0d
lda #$01
sta $d01a
sta $d019 ; ACK any raster IRQs
lda #$00
jsr $1000 ;Initialize Richard's music
cli
hold jmp hold ;We don't want to do anything else here. :)
; we could also RTS here, when also changing $ea81 to $ea31
irq
lda #$01
sta $d019 ; ACK any raster IRQs
jsr $1003 ;Play the music
jmp $ea31
* = $1000-2
!binary "BubbleTrouble.sid"
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Mace
Registered: May 2002
Posts: 1799 |
A SID file holds more than just the binary of the music routine. It has a header, which, in your case, is at $1000.
The code part start higher up in the memory.
You need to truncate the SID so that you only have the real binary in the memory.
Check here for more information: SID header information. |
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MisterMSK
Account closed
Registered: Jul 2009
Posts: 37 |
Mace,
Thank you. I had to remove the first 124 (7C) bytes off of that SID and it worked perfectly with the code. Would of been nice on Codebase64 to mention something like that, I guess instead of saying.
Quote:Rip one of my tunes from the HVSC and save as music.dat if you like
Thanks Again,
MisterMsk |
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chatGPZ
Registered: Dec 2001
Posts: 11386 |
try this:
*=$1000
!bin "BubbleTrouble.sid",,$007c+2 |
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Inge
Registered: Nov 2003
Posts: 144 |
Quote: Mace,
Thank you. I had to remove the first 124 (7C) bytes off of that SID and it worked perfectly with the code. Would of been nice on Codebase64 to mention something like that, I guess instead of saying.
Quote:Rip one of my tunes from the HVSC and save as music.dat if you like
Thanks Again,
MisterMsk
I'll explain what "save as music.dat" means.
In Sidplay2/Win you can choose File->Save As. Choose to save as C64 data (.dat). You'll then get a C64 binary without the PSID header. |
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Frantic
Registered: Mar 2003
Posts: 1648 |
I added some additional notes in this article, in order to make these things clearer for beginners:
http://codebase64.org/doku.php?id=base:simple_irq_music_player
..and while I am at it, I should also remind all the coders out there to keep adding stuff to codebase! (Well, there is in fact some contributions every now and then, so I am not complaining, but there could always be more. :) |
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MisterMSK
Account closed
Registered: Jul 2009
Posts: 37 |
Quote: I added some additional notes in this article, in order to make these things clearer for beginners:
http://codebase64.org/doku.php?id=base:simple_irq_music_player
..and while I am at it, I should also remind all the coders out there to keep adding stuff to codebase! (Well, there is in fact some contributions every now and then, so I am not complaining, but there could always be more. :)
Thanks, Frantic. It looks great. Nice instructions. Step-by-Step and everything.
Inge, Thank you for explaining the saving of the .DAT stuff. It helps. I tend to use HxD for Hex-Editing in Windows, quick and easy goto 7C and delete all before and save.
Ok... Lets gets a little deeper into this playing music code. I kinda' want to play the SID while the users choices from a menu. Since I have a menu in code already, I could put a routine around there. With the above code, Would I remove the hold statement and put the menu in between where the hold statement was? |
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Frantic
Registered: Mar 2003
Posts: 1648 |
Yes... If you want some sort of main loop running in your program, it should be instead of that jmp hold stuff. |
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