YMF289

[rdefabri]

Hi all - first post.

Great stuff here, I've lurked for some time.  I am a lifelong gamer, having owned an Atari 800 from back in the day.  I always admired the C64 and the SID chip, and coming from a musical family, I have owned a number of e-drums, synths, etc.

I'm all thumbs, but interested in building a mb6582 ala Wilba, but the Midibox FM caught my eye as something perhaps a little easier to obtain/build.  I scoured a bunch of PCs and laptops I have for an OPL3, and I found one with a YMF289 / YAC516 pair. 

I realize the form factor is different than the YMF262 - but is this not an OPL3 variant?  Curious as to why it's so different from the 262.

Thanks,

[mrcam]

Found this... http://sue.niko.to/ps98/ps98@ymf289b-s_sch.png'>http://sue.niko.to/ps98/ps98@ymf289b-s_sch.png

Hope it helps  :)

If it does the same (apparently not very different)... it could be an alternative to expand the opl3 sound chip choice.

edit: all schematics and pcbs are here http://sue.niko.to/ps98/ (but i do not read ?japanese?)

edit2: http://www.midibox.org/forum/index.php/topic,6196.0.html

[rdefabri]

I do believe it's the same.  From what I can ascertain, it's definitely an OPL3, but it's referred to as "OPL3-L".  Given the foot print and pin differences, to use this on a Midibox FM would require a PCB change.

Thanks for the schematic, although I must say I am "schematically challenged" - I understand the basics, not much more :( 

[frailn]

According to this this site:

5.0 or 3.3V; 44.1kHz OPL3-L: OPL3 low voltage version in 44-pin QFP package. Operational temperature range from 0°C to 70°C.

It appears to be a "low voltage" version???

[Goblinz]

According to this this site:

5.0 or 3.3V; 44.1kHz OPL3-L: OPL3 low voltage version in 44-pin QFP package. Operational temperature range from 0°C to 70°C.

It appears to be a "low voltage" version???

Would make sense if it's pulled from a laptop.

[rdefabri]

So then in theory, it could be used, correct?

I suppose it's more trouble than it's worth since it's a 44-pin as opposed to a 24-pin.

[rdefabri]

Sorry for double-post, I found this nugget:

"The YMF289B (OPL3-L) is a synthesizer chip developed specially for notebook PCs and PCMCIA (Type II) cards. The YMF289B is compatible with the YMF262, the de facto standard in the sound card industry. Special functions such as power down mode and 3.3V power supply are new features that distinguish this quality chip."

So that would lead to another q - if this could be made to work, does one need the YAC516 or could the YAC512 be used?

Datsheet:  http://www.fit.vutbr.cz/~arnost/opl/lost+found/4mf289b20.pdf

My laptop has the 48-pin variant...registers are readable, only discernable difference to YMF262

[stryd_one]

Sorry for double-post,

It's OK :) but there is a 'modify' button if you want to use it :)