poobah
-
Posts
1,690 -
Joined
-
Last visited
-
Days Won
3
Content Type
Profiles
Forums
Blogs
Gallery
Events
Store
Community Map
Posts posted by poobah
-
-
Way back in the dark ages, before the dawn of time (I think '80 or '81) I hooked up a little Radio Shack momentary contact job to my trusty Atari 800. I'm fairly certain it was on the 6502's reset line, but I don't know for sure. It's definately possible, 'cause I have one.... I'll have to head down to the old computer archive/basement and drag her out for inspection....
-
I went and looked through the seller's feedback... I think you might be lucky to not have paid for shipping. Lots of complaints about winning broken junk.
Though, I do wonder about the people that bid $20 on an "untested" hard drive. I thought everyone knew that "untested" meant "this is broken"
-
Can the XEGS be upgraded to 128k ?
Thanks!
-Ken
-
I think rudolphe said something like 20,000 falcon motherboards were made, but Atari only made 12,000 falcons and sent the other 8,000 to C-Lab.
-
Alison did the programming behind the interface, my part was to break it and produce the PCB's.. The ones alison has on Ebay are all her own work.
I know it was a bit tricky to get the phased pulses just right at first but it was soon sorted out. Alison has done a fantastic job on the programming for PeST. I wouldn't be putting the CPS name to it otherwise!
I never really liked the Atari mouse anyway, but after using this module for the past couple of weeks now and after using it you just really dont want to go back to the atari mouse again thats for sure!
chris
Yah, the pulses took me a little bit. I wound up with a 'list' of the 4 combinations for each axis. Each delta 'unit' moves forward or backward in the list with wrap-around. I've come across a couple mice that don't work well with mine... the timing they expect is kinda funky. That, and a lack of desire to spend a few days soldering kept me from selling them.
-Ken
-
Yep. Good ST mice are just about impossible to find in the USA, so I cobbled up a PIC and a nice optical PS/2 mouse for my TT030. Not too terrible, a little interrupt to check for PS/2 data and meter out the ST pulses. The PS/2 data drives X and Y deltas, and the ST output decrements them. Acceleration comes from how often you send the ST pulses. I think I used a 16F628A... I'd have to de-glue-blob it to be sure.
I'll have to throw a picture up on my website some time.
The interface you guys did for acceleration is really slick.
-Ken
-
Wow, ouch, whatever. I have comments, but I'll save them.
Anyway, to put the matter to rest...
I went and looked up the 1040ST schematics... The Shifter outputs 3 bits per color, which are fed through a little resistor network (essentially a cheesy D/A converter) and then fed to the RGB pins on the video connector.
So... the Shifter puts out a digital color signal, which is then converted to analog before hitting the monitor connector.
Cheers!
-Ken
-
Hmmm,
OK, looks like its hiding on the back. I didn't see a cap on the PIC power pin in prior screenshots... Gotta have one. I assume you are using the internal pullups on the clock and data lines as well.
I like the little box by the way, nice packaging. Mine is a dip PIC with wires right to the pins and a blob of hot melt!
Nice job. Good to see the ST tinkering scene is still alive and well.
-Ken
-
Did you guys put a cap on the power pin yet?
-
I'll post it here before it goes to ebay. (TT030)
-
I hate to disagree here, but the ST's RGB are most definately analog (in ALL resolutions). The RGB lines output a voltage representing the intensity of a given color, between 0 and 1 volt, with 1v being the most intense (white is 1v on all lines). You can verify this by hooking a scope up to one of the lines and capturing some data. Incidentally, the VGA spec is 0.7v max, which is why you have to add a resistor on the R,G & B lines when you make a VGA adapter for the STs.
Back in the dark ages (before VGA) there were digital video setups, where you'd output binary for a given color, but that is pre-ST. (and a horrible cludge it was...)
The ST's colors are limited by screen memory and the SHIFTER chip, NOT the signal being outout to the monitor. In fact, there used to be a hack to get 32k colors by soldering up a second SHIFTER chip.
Really!
-Ken
-
Picked up a Falcon (finally) it's a DDD modified one - they made a desktop case out of it, by removing the front slanted part and replacing it with a 'cover' where the keyboard would normally be. I'll have to post some pics soon.
On the plus side, I think I can let one of my TT030s go now =P
-
So, in total I reported 5 auctions that were CD's or DVD's of Atari Lynx or Atari 8-Bit ROMS/disks. Total number of said auctions that completed sucessfully with no interference from ebay: 5
That's messed up.
-
I've reported a bunch of these things in the past few days, and all of the auctions are still up and running. Not really impressed with ebay's follow through.
-
Thought I'd offer these here before heading to ebay:
Cart Only: Raiden, Cybermorph
w/Box & manual: Flip Out
Make an offer for one or all. I'd ship pririty mail ($4.50 or so)
-Ken
-
Just curious, do you usually report items like the one below, and does ebay do anything about it?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...AMEWA%3AIT&rd=1
-
Anyone?
-
Looking for an Atari Falcon 030, with at least 4 megs, and a hard drive. Cash or trade for TT030.
Thanks!
-Ken
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
XEGS: Game System or Computer?
in Atari 8-Bit Computers
Posted
On the plus side, most of the issues are easily remediated with with a new kb cable, and a couple joystick extensions... you couldn't live with an early ST without two 6" joystick extenders... must have been the same design people =P