Re: [hatari-devel] YM2149 register dump from Hatari debugger

[David Savinkoff <dsavnkff@xxxxxxxxx>]

Hi,

Here is a similiar topic from atari-forum:

Re: YM recording unstable
http://www.atari-forum.com/viewtopic.php?f=51&t=24237&sid=cc65ed631bccced0de4c322db87859a2#p253642

Make a Raw Data YM2149 sound file specification:

- 4 Bytes for file identifier (magic)
- 2 Bytes for file Header size (Header can be zero length).
- Header Bytes {
song titles, copyright, whatever
}
- 4 Bytes time since last sample in microseconds
- 1 Byte for YM register number
- 1 Byte for YM register data
....
- 4 Bytes time since last sample in microseconds
- 1 Byte for YM register number
- 1 Byte for YM register data

(note: the last sample is not played, but the 'time' value is used)

In Hatari, the Sound_WriteReg( int reg , Uint8 data ) function
could produce the data.


----- Matthias Arndt wrote:
> Hi all,
> 
> I was experimenting with Ym2149 sound effects lately, including the
> construction of input for XBIOS 32. I needed a quick method of seeing
> what values have been written to the YM2149 lately and I simply added a
> callback to the debugger info command:
> 
> CPU=$35ab0, VBL=46425, FrameCycles=68, HBL=0, LineCycles=68, DSP=N/A
> $035ab0 : 6606                                 bne.s     $35ab8
> > info ym2149
> YM2149 register contents
> Reg $00 : $00
> Reg $01 : $00
> Reg $02 : $00
> Reg $03 : $00
> Reg $04 : $00
> Reg $05 : $00
> Reg $06 : $00
> Reg $07 : $FF
> Reg $08 : $00
> Reg $09 : $00
> Reg $0A : $00
> Reg $0B : $00
> Reg $0C : $00
> Reg $0D : $00
> Reg $0E : $27
> Reg $0F : $00
> > c
> Returning to emulation...
> 
> I have attached the small patch, please review and include if ok. It is
> probably of not much use to most of us but some may have a benefit ;)
> 
> Regards,
> Matthias
> 
> -- 
> http://final-memory.org/
>