diy mb808 questions

MIDIbox SEQ
1

Hello

I’m Rob from Venice – Italy and i’m a synth and audio stuffs Diyer.

Well after midibox sid and fm now i’m building a diy like-mb808 drumachine but there are a lot

of infos in ucapps and in 808 doug site …i’ve mixed all and now i’m little confused.

I’ve built all the ucapps hardware modules bought from smash tv : core with 18-620 pic , 2x din , 2 x dout.

I’ve flashed code “setup_808_with_swingpot†and all is working , i’ve connected all dins, buttons are ok

But now i’m wiring the dout and i’m a little confused about shift registers outs.

I hope someone could help me :

First question : where i take trigger signals for instruments? (the 16 step-leds are also triggers out?)

Second question : i think i’ve flashed the wrong firmware version for my hardware what are the differences about versions in

“midibox_808_v1_3a†pack? someone have a correct pin list for dout pins with “setup_808_with_swingpot†and showtech modules?

sorry for the confusion— brain sssstormiiinggg!!

 

 

Thanks a lot

 

Rob

2

Hi Rob,

 

 

First question : where i take trigger signals for instruments? (the 16 step-leds are also triggers out?)

 

 

Have a look into the setup_mb808_default.asm file (which is also referenced by setup_808_with_swingpot.asm)

; Following table allows you to define
; - the track names (must consist of exactly 6 characters!)
; - the DOUT shift registers (SR) to which the drum triggers are connected
; (1-16; 0 disables assignment)
; - the DOUT pin to which the drum triggers are connected (0-7)
; Note: since version v1.3 the "real" Dx pin number (D0..D7) has to be specified, in previous releases it was mirrored!
; - the MIDI output port (0=disabled, 1=Default, 2=Internal, 3=IIC1, 4=IIC2, 5=IIC3, 6=IIC4, 7=Trigger Only)
; - the AOUT/CV channel to output velocity (1-16, 0=disabled)
; Note: AOUT module only supports 8 highres channels, but CV outputs can also be realized with DOUTs (see DEFAULT_CV_DOUT* option)
DEFAULT_TRKINFO MACRO
    ;; Name SR Pin MPort AChn
    db "BD ", 1, 6, 1, 0 ; Track 1
    db "SD ", 1, 5, 1, 0 ; Track 2
    db "LT/LC ", 1, 4, 1, 0 ; Track 3
    db "MT/MC ", 1, 3, 1, 0 ; Track 4
    db "HT/HC ", 1, 2, 1, 0 ; Track 5
    db "CP ", 1, 1, 1, 0 ; Track 6
    db "MA ", 1, 0, 1, 0 ; Track 7
    db "RS/CL ", 4, 7, 1, 0 ; Track 8
    db "CB ", 4, 6, 1, 0 ; Track 9
    db "CY ", 4, 4, 1, 0 ; Track 10
    db "OH ", 4, 3, 1, 0 ; Track 11
    db "CH ", 4, 2, 1, 0 ; Track 12
    db "Ext1 ", 0, 0, 1, 0 ; Track 13
    db "Ext2 ", 0, 0, 1, 0 ; Track 14
    db "Ext3 ", 0, 0, 1, 0 ; Track 15
    db "Acc. ", 7, 0, 7, 0 ; Track 16
    ENDM

 

this is also the place, where you could change the pinning - the .asm file has to be recompiled to a new .hex with the MIOS8 toolchain as described here: http://www.midibox.org/dokuwiki/doku.php?id=windows_toolchain_quickstart

 

 

 

Second question : i think i’ve flashed the wrong firmware version for my hardware what are the differences about versions in

“midibox_808_v1_3a” pack? someone have a correct pin list for dout pins with “setup_808_with_swingpot” and showtech modules?

 

the complete configuration is described (and can be customized) in the .asm files

 

Best Regards, Thorsten.