olaconmuchospeces Posted March 5, 2007 Report Posted March 5, 2007 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 Quote
TK. Posted March 7, 2007 Report Posted March 7, 2007 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 = 0xf0Attack/Decay = 0x00Waveform = 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. Quote
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