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ChipMusic.org / Forums / Posts by yogi
Topics by yogi
Posts found: 545-560 of 621
analog monster wrote:sadly no. a 6x AA battery pack would work though. 78xx regulators require approx 2 more volts at the input than their output voltage to function properly. They usually work for a while with fresh alkaline AAs, but rechargeables have a surprisingly wide voltage fluctuation, you probably wont get 7+ volts for very long. But I have rechargeable 9v batteries anyway, and it would be just as easy to hook up an external battery pack with a suitable jack on it.. It was more for the aesthetic as I like the idea of a portable 2600 synth with all the hardware contained in the case.
Very interesting idea. As far as battery packs, you might look into re-porpoising cordless drill battery packs. Could even reuse the handle parts to allow quick change. I bet with a 12V pack you would have Days oi run time. This reminds me of BenHeck's case mods, handheld A2600s.
[
It really is fab, not only for ROMs on SD but also for development. Code testing with the USB connection couldn't be easier.
little-scale wrote:Nah, it's the simplest thing possible
Teensy ADC --> Joystick ports --> 6502 --> TIA
Ooo K, Very Cool! (seem like I'm always saying 'cool' when you post:) )
little-scale wrote:The audio is not formatted at all - it's just an analog audio signal 
In terms of signal conditioning, I've had to 1) Be careful about the range of voltages that I send in 2) Add compression, limiting and multiband compression to my audio output chain that is being sent to the Atari 2600 to squeeze the best out of the four bits...
WOW, are you pushing an analog sig into the Teensy's ADC? Or are we talking processing within M4L(?) sent to tha a26 in 4 bits?? Or is there some special Little Scale magic in the 6502 kernel, using the Joyport's paddle tricks???
This is epic.
little-scale wrote:yep. the junior is actually my atari console of choice for gigs - i just bought another one recently actually.
eventually i'd like to run a minimal dual atari 2600 setup for live set
Oh yes, the Junior is so compact.. I got this one and used it a little, but I'm a real 'wood grain' nut, still hanging on to the heavy sixer I got in the '80s. There's a little magic in that black plastic. 
sweet, a 2600 covox! How is the audio formatted? This is just too cool!!!
little-scale wrote:"This is a working demonstration of a new feature that will be included in the next A26F update. Channel 1 of the Atari 2600 sound chip is used purely as a DAC for an input audio signal channel 2 is used as per normal (as a limited oscillator)."
Just amazing!
little-scale wrote:True re: Atari Age - and some of the other options BUT one might see them for sale second hand from time to time (I have about 8 or so lying around that I'm not using )
Yea, still got a Supercharger (and a "Stella gets a new brain" CD) that I got ages ago when I first started messing with homebrews. It hasn't see any use since I got hold of a Harmony cart!!
Such a very good year!! And should work well with the Junior too!
little-scale wrote:Victory Road wrote:is there anything that works with the 2600 junior? i've heard that synthcart doesn't play nicely with it
Synthcart won't work as well because of the switches vs buttons on the console itself to select the settings
OK that makes allot of sense; never thought of that, the diffs with the C/BW, ect switches.
cool! cool! coolCoolcool cool!
Thank you so much!!
EDIT: And two patches all ready!!
Here are a couple bookmarks for cart PCBs
http://longhornengineer.com/projects/pc … -2k4k-pcb/
http://www.grandideastudio.com/portfolio/pixels-past/
PixelsPast don't seem to be fabing boards, at least I haven't seen them @ Atari Age for a while. So these links are a DIY option.
This may be of use to someone, nice little DOS Midi handler/converter program.
http://www.urr.ca/software/software.htm
There is a section on the web page, "dos hardware drivers" that has some really interesting driver support links
little-scale wrote:it won't be a physical product you can buy, just instructions, open source code and schematics.
Cool! another project!!
EDIT: didnt read you first post.. VERY WAY COOL 8)
Victory Road wrote:is there anything that works with the 2600 junior? i've heard that synthcart doesn't play nicely with it
I've never tried my synthcart on my Junior, but I dont know why there would be a conflict. AFAIK, the Junior has the same chipset, no fundamental differences. The only thing I've ever seen a problem with was a slight difference in the cartridge slot. have a slightly damaged Popeye(?) cart that wouldn't retract the dust cover on my light sixer but would plugin fine on the Junior. Never had any 'compatiablty' issues with running games, but your mileage may vary
Hahah! that's the best part 'bout chiptunes, 'testing' the consoles!
O2star wrote:I have a Portman PC/S device as well, but Im pretty it needs external power from a power adapter which I do not have.. 
Last night I DLed the manual and it said the interface can be port powered, IF your serial port CAN supply enough. some or the older Laptops didn't I guess. I can send you the manual&drivers I found if you need them
O2star wrote:Is this a desktop or laptop you are running? The all-in-one is what you are trying to do DOS tracking on and midi?
It's an all in one PC, (kind'a like a LCD pix frame) that was marketed as a 'Network only Appliance'. Sold at a loss with a contract for their dial up service in the late '90s. It was discovered that the mobo was a basic PC design, and soon there were a dozen how-to-hack sites. Not sure how to imbed a pix, but http://en.wikipedia.org/wiki/I-Opener
will tell you more then you ever wanted to know.
Very interested in how the Portman PC/P works out; seems like the way to go, Parallel ver Serial, with this hardware I have. Thinking that a USB midi would be a problem with DOS based softs, but the driver package I found for the Portman was in three flavors '95, '98 & ME, if i recall, so not even sure how well they would work under DOS?!?!
Posts found: 545-560 of 621
ChipMusic.org / Forums / Posts by yogi