NonMB SidSynth...

[olaconmuchospeces]

Hi everyone: before starting the whole project of building a midiBox sid synth, Im trying to build a simplier synth by my own. Im using a PIC16F873 microcolntroller to interfase my Sid Chip with my PC via serial port.

Using portB for data, portA for addres and portC for clock and cs/ rw signals, I run a max/MSP patch to control the sidChip/.

Well... the hardware seems to work but there is no sound yet and I was wandering if its there any kind of "brute force" test to be sure if my sidChip is alive.

I look around but I cant find anything. Any though will be great !.

than you very much !

diex

[TK.]

Hi Diex,

the easiest way is to use following register settings:

volume register: 0x0f  --- you should hear additional background noise now!

frequency register (low/high) of voice 1 = 16777 (for 1kHz)

Sustain/Release = 0xf0

Attack/Decay = 0x00

Waveform = 0x11  (Triangle, Gate on)

You haven't listed the reset signal of the SID - how is it controlled? Maybe it's permanently active?

Best Regards, Thorsten.