I have the serial connector on backwards, and since I HAVE to send out for new boards a fixed a few nitpicky things that would not effect operation or performance, but it bugged me.
Gerbers going out tonight, take about 3 weeks. Meanwhile I have cases in hand just gotta machine them with the jigs I have planned out but have not made quite yet.
Pocket Serial host PCB’s are in my hand. First time using Itead studio and I am quite happy with the result. After problems were sorted it took about 3 weeks to get them, and they look pretty darn good. The boards are 54mm x 89mm, just slightly too large to fit in the 50x100mm price category. If I shaved 2mm off each end of the board they would not fit on the enclosures supports and rattle around, so I got the slightly more expensive 100x100mm service, and instead of 10 boards, they sent me 12 (yay), which actually dropped the price by ~20 cents a unit.
Next up I have to make a solder stencil, and then I can paste, then reflow the parts at my workplace while off the clock (and wearing a sign saying I am not on the clock so leave me alone)
Here is a scanned image.
Ordered PCB’s, there was a problem with my file outputs cause they were not clear on what they needed other than “send us gerbers, heres an eagle template that doesnt work in altium” got that worked out… They should be slow boating it in the next few days
Ordered enclosures last week, got notified of a 6 week lead time UGH, so close yet so far, oh well more time for software refinement.
After the sanity check I noticed that I forgot to add the LED(s), and that there was some high frequency oscillation in the voltage regulators. I reduced total capacitance in parallel to help squelch that. I made a PDF of that schematic and decided “eh screw it” and moved on to reworking the SMD version
but I forgot to add the LED’s (DOH) so yea, lesson learned, make multiple saves when doing different versions. Tween the two there is not much difference, the SMD version has a schottky diode for input protection, and a low dropout 5 volt regulator to account for the dirt cheap 6 volt wall warts I had bought.
The 3.3 volt regulator changed as well to a smd version but after that its all the same parts, just in smd packages (so a atmega328p-pu changes to a atmega328p-au type of stuff)
Here is schematics as of now for both, keeping in mind the though hole version does not have the indicator led’s in place … fix that later
cheesefactory.us/filecenter/VSHOST%20th.pdf
cheesefactory.us/filecenter/VSHOST%20smd.pdf
Quick picture, note at my employment it is a sin to make a PCB without all 3d models populated, im not at work so its missing models
Demo Video of the virtual serial host
EDIT I dont know why its now magically not showing the video so here’s the link
Three goals I had in mind for retro challenge this year were projects I was already working on:
Graphics for retrospectiva: I one DHGR image out there, wanted to do more but I got one!
Finish Ballbuster for retrospectiva: … um yea not done
Get the pocket serial host out of the way: This thing has been working for quite some time now, I just got to get the material printed and the PCB’s out the door. A sanity check was made on perfboard and is working. I wanted to get a quick video up for retrochallenge of it working, but I got sent to Michigan with no notice this week, and just returned tonight. A very basic schematic and code is published on this site if one wanted to whip it together using an arduino and a breadboard though.
Not quite as sucessfull as I had hoped, but better than previous years
No smoke, pop’s bangs or fire to report of. During my poking around I noticed I wired a TX line going from the serial port to the MAX232 converter to ground, fixed that … got some oscillation in the voltage regulators.
Power comes in clean from a wall wart thanks to some input filtering , hits the 5 volt regulator and it starts oscillating around 131Khz at ~100 millivolts, that hits the 3 volt regulator and oscillates about the same frequency at around 200milivolts sending my 3.3 volt to 3.5 volt peak. None of that is critical and the thing works fine, but I make electronics for a living and it would not pass any of the testing I would subject it to at my work, so its not good enough here.
Its an easy fix, in a nutshell I went capacitor mad, thats good, but in reality all those caps are in parallel making a large capacitor that cant really shunt out “high” frequency noise cause it cant react fast enough, hince the wiggle on my scope screen. So I have a few options there, and once I pick out the best one, its a minor schematic update.
Finally got done making a point to point wired board for the Pocket Serial Host / VSHOST whatever I am calling it this week as a sanity check for the schematics. Of course I had to pencil in a couple changes, nothing major just details.
Does it work? ell if I know, its too late tonight to smoke test it, load software and run it though its paces, those activities will be started tomorrow night. Smoke test is what it sounds like, I will take all the IC’s out apply power and see if anything is shorted (with a current limited supply to not cause any damage). After that its a matter to see that the correct voltages go to the correct places.
Then I will bootload the AVR, which means it can be programed though a normal serial port, and upload the latest firmware … which takes advantage of a DS1307 realtime clock, with battery backup. The SMD versions will be bootloaded as well so that its easy for users to do firmware updates once they are out in the wild, course since I have no plans to produce a though hole version, if you make your own, that will be up to you.
Think thats about it for now
Thanks
(click for larger versions)
This retrospectiva entery I went into the relm of color DHGR graphics, which I have never done before. Using bmpA2FC by Bill Buckels for image conversion. I have to say I was getting seriously aggravated with this program… that is until I read the instructions (doh!)
I will update with retrospectiva link when its available, which includes a self booting disk image like all my other entries
http://rsp.retrocomputacion.com/graphics-strange-world-by-osgeld/
I procrastinated for the longest time after picking out this plastic box, but I didnt really need to have it on hand. I have a crappy PDF with all the mechanical details, and I slipped that info to our ME at my work who clapped his hands and provided me with a 3D cad model in what seemed to be an instant, that I could load in Altium to make sure my physical parts would not crash into the case.
You got to love mechanical engineers, it would have taken me a week to make something close, this guy does a primitive model in 10 min meeting all the critical measurements while on a phone call.
Anywho, I finally ordered one for a sanity check, physical parts vs physical parts, and it arrived today. The box is an off the shelf pactec HM series and is listed in “PC BONE” color. If you look at the website it shows a fairly tan box, but in reality the box is lighter in its tan color. Sitting on top of my //c it doesn’t look too far off.
(color under daylight CFL)
(picture under incandescent lights but compare the reset key to the box, dead on, just give it 20 years lol)
Not quite finished yet, but I have not mentioned it yet
BALLBUSTER
It is a breakout style game that has no levels and never ends. Unlike most breakout style games, where you clear out a set number of bricks, take a moment and start a new set of bricks… This shit never ends until you DIE
You break out X amount of bricks and it adds a line of bricks marching down on you and speeds up… Can you keep up?
BALLBUSTER
coming in January 2013, 160 lines of basic written, four HGR screens, two shape tables, two text screens and over 2/3rds the way done.
So I (finally) started drawing schematics tonight, its been one big delay after another in osgeld Labs, some of it unavoidable some of it very avoidable. Since that’s the way its working I would like to announce 180$ preorders (kidding guys) no I would like to announce a basic starting point schematic and firmware for the hardware tinkerers.
First a rant on KiCad. KiCad is a open source EDA (electronics design automation package) you draw a schematic, assign footprints, make a pcb, ship it off and get back a printed circuit board. Though I have been using it for years, tonight I just about lost it… every simple durn thing turned into a MAJOR pain in the BUTT! Thats it, I am done, when peoples software just gets more and more broken over time, I dont have time to screw with it anymore, its not worth the stress, and this downhill slide has been going on for a long while it seems.
After taking 3 hours to do something that would have taken an hour min in Altium (another EDA that cost thousands of dollars, we use at my work) I was trying to export the schematic to PDF, SVG, any darn thing where it would loose half my work. So in a nutshell screw that, and for now you will have to deal with a crappy screenshot.
Word of warning, I have not actually made hardware off of this schematic… it should be correct (I kind of do this for a living), but I don’t guarantee it. Its also very basic hardware and there will be more things added into it in the future, mostly basic things like an LED, a switch, maybe a couple jumpers, but a biggie is a Real Time Clock … if I ever settle on one.
Software is also in a very basic state. this is not my current build, but its one that works as a VSDRIVE host, and nothing more. Since this is all in a very basic state, and not at all close to what I consider ready.
I will not be held responsible if you hook it up and blow something up… so dont save your tax forms on it, and accept personal risk to your hardware if you tinker with it.
(click for large version)
To compile software you need Arduino 1.01 (should work with 1.02 and 1.03 I will check in the near future) software and fatSDlib library installed in the libraries folder of wherever you install arduino.
you also need the apple II software, from the last 2-3 revisions of ADTpro
Just a picture of my cat being fat n lazy
http://rsp.retrocomputacion.com/graphicsdamn-cat-by-osgeld/
As I gear up for a run of 10 of these devices, one of the major issues has been to power the silly things. As this grew from a //c to a //c+ to an every apple ][ project it became apparent that there was no way I could tap a port on the computer for power, so a plug in wall-wart was needed.
These things can be retarded expensive, like this 24$ radio shack, transformer based hunk of crap. BUT I found a awesome deal on sale at electronic goldmine on a switching model wall-wart. Switching means its stout (enough) in the current department, while being compatible with 120-240 volt AC input, and compact … bout the same as any normal modern celphone charger.
Its probably a garbage design, but nothing worse than any other Chinese stuff that comes packed in with various gadgets of the modern age
I have submitted 2 graphic entries and am working on a mystery game for Retrospective 2012 … The game is not completed yet (heck I got 5 more months) but here are my 2 current graphics entries…
http://rsp.retrocomputacion.com/graphics-chip-by-osgeld/
http://rsp.retrocomputacion.com/graphics-alien-hug-by-osgeld/
Retrospectiva is a year long “contest” for us 8 bit nerds, Graphics, Music, and Games are allowed as entries but, it has to be for a vintage 8 bitter, and has to be done in BASIC, well let me just quote them.
Short rules:
What?: Create a BASIC game, graphics or music for 8-bit computers.
How?: The Games can be created on any variant of BASIC and any graphic mode. Use of non-native tools is allowed, with certain restrictions.
When?: The call for entries is open between May 14, 2012 and April 14, 2013 inclusive.
Voting: There will be a week long public voting phase on Retrospectiva site.
Prizes: Major prizes, courtesy of the fundación museo ICATEC.
Entry submission: Choose between e-mailing your already complete entry or signing up and reporting the progress as you go along.
A little while back, there was a flurry of activity on the comp.sys.apple2 group that started innocently enough. User Riccardo found some software that allowed you to serve a prodos disk image (up to 32MB) from a PC to your apple via serial port, but he could not get it to work.
Wanting something just like that, I jumped in with a little google magic, found the original authors website …
http://apple2.boldt.ca/?page=terserialdrive
But discovered that it was (only slightly) unfinished, and pretty much hard coded for some models of the IIGS. Luckily David Schmidt of ADTPro fame took an interest, and very quickly the Virtual Serial Drive was included in ADT 1.2.4 (along with an Ethernet version as well)
While its not perfect, its darn handy for many programs and it gives us //c owners an option for mass storage!
Even-though I was tickled beyond pink, I wanted to cut the PC life support, and I did just that.
I started messing with an AVR based Floppy disk emulator, have not done much at all with it, but if anyone is looking here are the Disk II stepper motor signals as viewed with my Logic Analyzer.
Originally posted on hackaday.com
I wanted a joystick for my apple II, and I wanted it to be in a modern gamepad style with a thumbstick, and so the above was born. Using radio shack parts, a thumbstick from a old XBOX1 controller and a pile of capacitors I got what I wanted.
Original post with all the technical details and schematics
UPDATE: I have acquired new buttons to replace those ugly, and more importantly uncomfortable radio shack plunger switches. Will update when I have time to drill out larger holes and mount the new dome style snap action switches I found.
Youtube Video
This originally was posted on hackaday.com
In a nutshell a modern linux computer downloads data off of the mobile version of weather underground, a lua script phrases text data, and sends it off to ImageMagick to create graphics. The radar image provided by the site is also sent to ImageMagick for dithering against an approximation of an Apple II HGR color palette.
The whole lot is saved as XPM ascii text images, and converted by the LUA script into base 36 encoded strings. Then its simply shoved down the serial port to the Apple II where a basic script decodes the strings into graphic plots.
Its slow as crap, and I plan on making it not suck sometime using the good suggestions given to me on comp.sys.apple2… but I have no interest in revisiting it at this moment.
Its a long winded post broken up into 3 parts
and a youtube video
