MB-6582 + SID6581-chip

MIDIbox SID
1

Hi all,

I already started soldering my mb6582 now. I want to stuff my unit with 4 x 6582, 2 x 8580 and 2 x 6581.

I know about the different psu-options,the jumpers to get 9 or 12v and about different filter-caps for the different SID-versions.

My question is : Are there any changes in the main.asm-file required when I want to stuff some 6581-SIDs?

Or just put in,select the filter caps and psu-option and be happy?

THX

Brother303

2

I believe the only difference now between the 6581 and 8580/6582 builds of MB-SID firmware is the default filter cutoff range.

See the manual:

http://www.ucapps.de/midibox_sid_manual_e.html

I recommend you use the same firmware (setup_mb6582.asm/setup_mb6582.hex) for all PICs which will have the default set to the 8580/6582 range, and then for the slave that has 6581, change the range for just that SID, in all ensembles.

If you could be bothered, you could hard-code the default range so all ensembles would initialize with the 6581 range for one SID pair, but then you’d have to manage this difference every time TK does a new release.

3

Hi Wilba,

thanks,this helps much. It`s ok to me to make a little change in the filter-menu (ensembles).

Dont think Im going to code…

Thanks lot,Wilba! Great support!!

;D