+Stephen Posted November 27, 2012 Share Posted November 27, 2012 I also have an XM301 (my original from 1987 when I first got online), and an SX212. I would love to get an 835, and an 830 just for the collection. Quote Link to comment Share on other sites More sharing options...
+Stephen Posted November 27, 2012 Share Posted November 27, 2012 Isn't your board on the way yet? or is Bryan on the fence about letting his go? Bought out from under me. No worries - may be a chance for a repro board, but with all my other A8 stuff, I really didn't need this. Just would have been cool for the collection. 1 Quote Link to comment Share on other sites More sharing options...
venom4728a Posted November 27, 2012 Share Posted November 27, 2012 Darn , I did not even know it was still up for bids. Robert Quote Link to comment Share on other sites More sharing options...
+Stephen Posted November 28, 2012 Share Posted November 28, 2012 Some things are very elusive The chase is often better than the catch (so to speak). Took me eight years to get my AVM. Quote Link to comment Share on other sites More sharing options...
Shawn Jefferson Posted November 29, 2012 Share Posted November 29, 2012 (edited) Got the majority of my parts delivered, I've started (well resumed-since I had most of the sockets and decoupling caps already soldered on) soldering the components. Hope this thing works at the end! I'm curious where other people are in this project. How many have been done at this point? Two? Edited November 29, 2012 by Shawn Jefferson Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted November 29, 2012 Share Posted November 29, 2012 Bought out from under me. No worries - may be a chance for a repro board, but with all my other A8 stuff, I really didn't need this. Just would have been cool for the collection. That blows, yep if Kurt gets any made that would be really cool Some things are very elusive The chase is often better than the catch (so to speak). Took me eight years to get my AVM. Yep, if I knew Brad had them earlier when they were $25 ea for 1 PCB, I would have bought a few of them... And the one I did get was a lot more but since there are some out in the wild, there is a good chance that more will re-appear in time... Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted November 29, 2012 Share Posted November 29, 2012 Got the majority of my parts delivered, I've started (well resumed-since I had most of the sockets and decoupling caps already soldered on) soldering the components. Hope this thing works at the end! I'm curious where other people are in this project. How many have been done at this point? Two? Did you get a power supply yet? I found a switching power supply on ebay that had +5v, +12v and -12v and replaced the -12v regulator with a 7905 for the -5v... Hope yours works too triple check your work Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted December 8, 2012 Share Posted December 8, 2012 (edited) Today I replaced R141 with a 1K (as in the schematic) instead of the 100 ohm and it's now very cool to the touch and the -5V rail is still switched properly Edited December 8, 2012 by AtariGeezer Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted December 30, 2012 Author Share Posted December 30, 2012 Today I replaced R141 with a 1K (as in the schematic) instead of the 100 ohm and it's now very cool to the touch and the -5V rail is still switched properly They say "If it ain't broke, don't fix it." but now you have me wondering. There was conflicting information for the value of that component. While the schematic does say 1k, the Atari 1450 BOM said 100ohm, and I confirmed that value with one of the few factory-built 1450's. So, I guess that we can say that 100ohm is historically accurate, but likely incorrect. The video circuits were similar, with Atari repeating their typical impedence-matching and other errors in the 1450. I corrected those errors in mine a few weeks after completing the basic build and achieved a small but noticeable improvement in video quality. I'm giving a talk about how I accomplished this build at my local hackerspace (heatsynclabs.org) in the next few weeks. I'll probably tempt fate and incorporate your R141 correction before the talk. cheers, v Quote Link to comment Share on other sites More sharing options...
Shawn Jefferson Posted January 18, 2013 Share Posted January 18, 2013 (edited) I'm still working away on this thing... for the life of me I can't find R83 and R134 on the board though. Nevermind, trolling through the thread I found a good enough picture of an empty board to find these. I've put something in them both, so I'll have to double check those. Hopefully I just forgot to mark that I'd populated them. edit: mystery solved... I actually starting populating this years ago, and I guess put those two resistors in at that time (along with a bunch of caps and sockets). I was getting a bit paranoid about my work so far, so brought out the multimeter and started doing some testing... found at least one mistake (bridged a solder joint). I know I also pulled a pad up desoldering a misplaced component as well-I may have to jumper that one. Edited January 18, 2013 by Shawn Jefferson Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted January 18, 2013 Share Posted January 18, 2013 For R83, look between U33 and U35 vertical. For R134, look between U7 and U8 horizontal. Be careful on those pads and how long you leave the iron on the pad (10-15 secs tops) Quote Link to comment Share on other sites More sharing options...
Shawn Jefferson Posted January 19, 2013 Share Posted January 19, 2013 Thanks! I found them on a picture of a blank board... tested them tonight and they have the right values, so were all good. Trying to take my time, but I've put in a couple of long sessions late at night and got a bit careless (put a transistor in backwards and had to desolder it.) Quote Link to comment Share on other sites More sharing options...
w1k Posted March 17, 2013 Share Posted March 17, 2013 will be possible something like this on 800XE? 1 Quote Link to comment Share on other sites More sharing options...
Caterpiggle Posted March 17, 2013 Share Posted March 17, 2013 No, it only work on Atari 1400XL and 1450XLD. I did tried on Altirra Emulator with that 1400XL Telecommunications cartridge. It said, it only work on 1400XL or 1450XLD. Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted March 17, 2013 Share Posted March 17, 2013 (edited) will be possible something like this on 800XE? http://www.youtube.com/watch?feature=player_embedded&v=5m0LdMI7tIE For a talking term program you could use something like Sam Terminal http://www.atariage.com/forums/topic/129897-sam-terminal/?do=findComment&comment=1565537 or if you have a Voice Box, modify AModem or similar... Edited March 17, 2013 by AtariGeezer Quote Link to comment Share on other sites More sharing options...
Caterpiggle Posted March 31, 2013 Share Posted March 31, 2013 Hello AtariGeezer, I need to know if V: and T: handlers work on Altirra emulator ? Have you tried that before on the actually Altirra emulator with 1450XLD and 1400XL with Vortex ROM ? Al I see the the green output screenshot. Yes, I did replaced XL/XE ROM into 1400XL at first under XL/XE dictionary. Altirra has only one option to put OS system , can't be installed Vortex ROM. Please let me know if it actually working on Altirra with computerized voice both T: and V: Quote Link to comment Share on other sites More sharing options...
Caterpiggle Posted March 31, 2013 Share Posted March 31, 2013 The real reason, I would like to see working 1450XLD and 1400XL working on Altirra emulator. Because almost none of us own the real hardware 1450XLD or 1400XL for that matter. I know there are VERY VERY VERY FEWEST actually owns Atari 1450XLD or 1400XL or both ! And I don't own them. Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted March 31, 2013 Share Posted March 31, 2013 Both T: (Modem) and V: (Votrax Speech) devices are PBI types. The Votrax chip could be emulated with a Text-to-Speech ad-on, but I havent seen anything in Altirra's notes saying so. I'm sure if Altirra emulated the 1400/1450 we would have heard about it Quote Link to comment Share on other sites More sharing options...
Caterpiggle Posted March 31, 2013 Share Posted March 31, 2013 Good evening AtariGeezer ! Can you be kind to tell me who is the real author of Altirra emulator ? So that I may contact him directly Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted March 31, 2013 Share Posted March 31, 2013 Good evening AtariGeezer ! Can you be kind to tell me who is the real author of Altirra emulator ? So that I may contact him directly That would be phaeron... Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted June 6, 2013 Share Posted June 6, 2013 Thanks! I found them on a picture of a blank board... tested them tonight and they have the right values, so were all good. Trying to take my time, but I've put in a couple of long sessions late at night and got a bit careless (put a transistor in backwards and had to desolder it.) Hey Shawn, it's been a few months, have you been able to do more work on yours? Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted June 6, 2013 Share Posted June 6, 2013 They say "If it ain't broke, don't fix it." but now you have me wondering. There was conflicting information for the value of that component. While the schematic does say 1k, the Atari 1450 BOM said 100ohm, and I confirmed that value with one of the few factory-built 1450's. So, I guess that we can say that 100ohm is historically accurate, but likely incorrect. The video circuits were similar, with Atari repeating their typical impedence-matching and other errors in the 1450. I corrected those errors in mine a few weeks after completing the basic build and achieved a small but noticeable improvement in video quality. I'm giving a talk about how I accomplished this build at my local hackerspace (heatsynclabs.org) in the next few weeks. I'll probably tempt fate and incorporate your R141 correction before the talk. cheers, v Saw your video presentation, very well done Quote Link to comment Share on other sites More sharing options...
Vandal968 Posted June 6, 2013 Author Share Posted June 6, 2013 (edited) Saw your video presentation, very well done Thank you, I actually gave that same talk twice with slight differences. Both are on youtube, but the video on the first one is so quiet that it's hard to hear what's going on. I did incorporate your R141 fix and the resistor now runs cool. For anyone interested, here's the second video first (better audio): And here's the first one, with slightly different slides and video of the first power-up and speech tests: Best, v Edited June 6, 2013 by Vandal968 1 Quote Link to comment Share on other sites More sharing options...
+Guitarman Posted September 24, 2013 Share Posted September 24, 2013 Finally started getting back to getting my parts. Ordered a handful of parts from eBay and also purchased the power supply. I found a boatload of those ELPAC power supplies here at work so I'll have a case to put the PS in when it arrives. Quote Link to comment Share on other sites More sharing options...
+Guitarman Posted September 25, 2013 Share Posted September 25, 2013 Have a question. Where is the MMU on the 1450XL?? Best shows the part (same as the 1200XL CO60609 (1200XL / 1450 MMU)) But I don't see it on the BOM. Is there something else taking its place?? Quote Link to comment Share on other sites More sharing options...
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