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hey guys, anyone know of a good AY-3-8910 music chiptunes archive? ZX Spectrum, hundreds of arcade machines, dozens of home consoles and computers used the chip; most of my expertise is in Atari ST which uses the YM2149 (which is an AY-3-8910, but with some changes.) The YM archives tend to be...

Neat :) I keep looking for old 8bit "fonts" with simple reuable licensing.. maybe theres a pool of these around. *goes to look* jeff

That bit is right out of the datasheet so I'm assuming its good; really, my video DAC does something similar.. as long as they're output pins, they're mixing their signals together, so its okay .. but yeah, you would think you have some resistor in each of the channel outputs, or even a signal...

Sort of -- the AY family has 3 channels of output, but internally it has the noise channel you can work with. But thats a modulator, not a direct output. FWIW, I've minimized components on the lm386 and it works pretty well; no gain or anything and it'll work fine :) This is a very WIP piece...

okay, I put together a very quick test of hardware 'channel mixer', and amp/volume. The ay-3-891x just spits out 3 channels of lineout, so I tie them together pretty much, with a resistor divider off to ground. The rest feeds into the volume pot (currently a big knob, but on pcb I'll see about...

https://www.youtube.com/embed/Eh6FWRqwBwE?feature=oembedAnd another lame little palette test cycle video.. Mostly test code from a year or more back but the screen above is in there now

Here is a basic palette test; I think I need to fiddle with resistor values or diode values on the brightness DACs.. The voltage blend seems off but no chance yet to throw that on the scope this build.

Really? I was planning on a 5V feed to it.. Hmm i do have a straight up Vcc line from power carried around so I could route that through, and require Vcc then to be 12V brick say.. But I do most development by just powering from 5 and 3.3 (from usb and down)..  I'll experiment and see; will...

I suppose another thing to add to my todo list for the main pcb .. (besides apparently squishing even more into the already cramped space, or increasing the pcb size again..) -- add both a mixer and amplifier for audio. Currently (zikzak sbc rev3) just as the 'line out' (for each of the 3 audio...

For lulz, try it on pypy and hell with it :) (or jython..) jeff

I wonder if there are any build options for CPython, to include some extra debugging options? Or maybe link in somethign like efence that helps force faults on buffer under/over-runs? Yeah, tracking down stuff like that, especially a meta level (not in your code, but in the interp itself) is a...

In case anyone is curious.. the first thing I did was make a key-logger for the PS/2 keyboard protocol; ie: tap away, and show the 'scan code' (raw value) and the char code (display value) to serial, so that a keyboard map could be found. (You can google one up of course, but I wanted to know...

I thought you just got bored and dumped TH :) ED is right on all counts.. - I like the idea of making a "C4A2" thing.. I've got some baseline features in mind to enhance the basic C4A idea, but we should also think about the larger picture .. tieing into stores/repositories, and launchign...

Made a rant on the zikzak blog .. most of it is here already, but though tI best kick off the blog again, for all the 1 people who read it :) http://www.zikzak.ca/dokuwiki/doku.php?id=blog:winter_is_coming_.._back_to_zikzak_hacking

<damn, my keyboard 'n' key is unreliable; partdon mistyping more than usual below :)> The below is useless, but if it amuses you, read on; thats why you're here, right? Fuuuuuuu', okay, got my ps2 keyboard code ported to the zikzak eZ80 side. goddamn .. that was one of those weeks, where you...

Styx: Master of Shadows (stealth goblin third person; punishing but pretty good) jeff

Distracted by real life, but working as best I can through ps/2 keyboard code running on the eZ80-side. Brought over my simple code that was from Atmel atmega chip (worked great), and its very spotty right now so trying to debug. Debugging interupt (timig) based code on an embedded chip is...

I've looked briefly into VGA->HDMI, and some of them look pretty slick (ie: headphone and VGA -> HDMI with audio, beauty!) like this guy on Amazon Canada for $20...

Order page is still up .. Wait wot, all gone already? Bah, missed it! Damnit, RL is too busy, I don't check the News links every day anymore :( Gratz to everyone, and to ED for keeping everyone whipped into a frenzy :) Going to be great! jeff

I've not worried about NTSC and PAL and any of that rubbish; when I first started out what 2 years ago or so, I was doing NTSC Composite to a C64 monitor, which was awesome and a real bitch (encoding the chroma and all that sucks real bad.) In the end I ditched that because it was so...