sjakie

Hi, I was thinking to use the 2com interface to start with in my midibox sid. However at first I thought it would be possible to make a simple switch for midi / serial selection without any changes to the software and reprogramming the pics, but now I am not sure. If it does require re-programming, would the following be ok to add to the main.asm of sid application so I can have my switch function? USER_Init        movlw 0x00     call MIOS_SRIO_TS_SensitivitySet         movlw 0x00 ; common midi     btfss PORTC, 4 ; rd4 is 1 is common midi     movlw 0x01 ; to host     call MIOS_MIDI_InterfaceSet         ...   I would use a 4052 and a switch to switch either the max232 or the 6n138 the rx/tx lines to pic, like so:          +5          |          [ ]10K          |       +--SW-+---- To J14 all cores       |   |       Gnd  |          | 4052          ---------         | S0   |         |     |    Midi RX---|1y1   |    Midi TX---|2y1   |         |     |    COM RX----|1y0   |    COM TX----|2y0  1z|--- Pic RX         |    2z|--- Pix TX         | E S1  |          ---------          | |          +--+            |            GND SW is a simple switch like an on/off switch. So the idea here is that the interface selection is controlled by a simple switch at power on for all cores. Will this be ok, or is there an easier way? ;D Am I missing something? Thanks

Ah, now I understand the question correctly ;)

Hi, I think the device settings (ID, LCD etc) are set very early by the bootloader. You can read it on the Bootloader page, "boot options". This allows for example to configure the MIOS-to-COM interface to download MIOS and applications. So no, I don't think you have to change the code of MIOS. But then again, I haven't build it yet also so double-check yourself :)

I don't think the electronics are difficult, you can find ledrings (or matrixes) in Midibox projects. For example 8x8 outputs give you 64 leds. If you'd take a dedicated pic you could make a matrix as big as you like. However, I think the trouble is more the physical creation of a ledrings with so many leds. A lot of soldering and precision work. How would you solder so many leds in a nice perfect ring? SMD Leds (and IC's) would probably do it, but that seems difficult to make at home. Integrating such a 'module' would require some custom programming I imagine, using either the midi slave mechanism of Thorsten or another serial connection of some sort.

I'm no electronics genius either, but you could always add a little electronic switch with a transistor and some resistors that switches on, on 0 volt level. These transistor types are called PNP. Here is a link that explains it for you http://www.kpsec.freeuk.com/trancirc.htm#pnp

The forum is very fast indeed :) Download speed of mp3 is a solid 130 KB, my cable is max somewhere around 400-500. The limit seems per connection because 2 download at same time still gives high speeds :) From the Netherlands. Ow and hi btw, I'm quitely lurking for a few weeks now, hoping to start building the great SID over the coming months :) Great project :)