+kheller2 Posted September 1, 2011 Share Posted September 1, 2011 (edited) As some of you are aware, I've been doing research for a month or so now on a peculiar motherboard that I acquired in order to bring it to life; it is a bare board. It has led to some historical confusion as to what came first, when and by whom. For example, the first XE shaped boards were marked 900XLF, yet, here is an XL shaped board (possibly before the 900XLF) marked XE. There are more notes and pics to follow in the next few days, but from working with drawings, pictures of produced 800XLF boards and a lot of late nights studying board traces, this prototype board, in my opinion, is a direct descendent of the the 800XLF REV R1-R4 boards. In fact, the majority of components and silkscreen names and locations are identical, perhaps up to 95% as you get higher into the REV level of the 800XLFs. I consider this a pretty shot, given I like the XL style the best: For marketing purposes, I'm calling this a 130XL to avoid confusion with the marketed 130XE. For new Atari users in the community, Atari 8bits have two names. One being the marketing name that you see on the label on the computer case/box itself, the other the engineering name etched into the board itself. And for those following along in the 1450 threads, you are familiar with this. Note, that when I say 800XLF I mean the PAL/NTSC "800XLF" boards, not the "ROSE" boards... although they do have similarities as well, I haven't investigated where they fit into the XLF timelines. Edited September 1, 2011 by kheller2 Quote Link to comment Share on other sites More sharing options...
Rybags Posted September 1, 2011 Share Posted September 1, 2011 Nice. Any more pics? What about that "50.84" - could that be 1984/week 50 ? Although that mightn't fit into the timeline properly. Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted September 1, 2011 Author Share Posted September 1, 2011 (edited) Nice. Any more pics? What about that "50.84" - could that be 1984/week 50 ? Although that mightn't fit into the timeline properly. That is correct. In fact the component side has this: That is confusing given this of a 65XE: Revision 3, already? During the 2nd to last week of the year. Edited September 1, 2011 by kheller2 Quote Link to comment Share on other sites More sharing options...
Rybags Posted September 1, 2011 Share Posted September 1, 2011 Does it have spots for the chips mainly associated with XE like Freddie, EMMU etc? Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted September 1, 2011 Author Share Posted September 1, 2011 I only know of three mentions of this board in existence... Best Electronics, in their REV 10 catalog has a picture of a built one, someone in another thread here mentioned seeing one at ICD/FTE once, and then this one. Enjoy: 4 Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted September 1, 2011 Share Posted September 1, 2011 It looks like a 800XLF board with an added memory bank. Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted September 1, 2011 Author Share Posted September 1, 2011 It looks like a 800XLF board with an added memory bank. Yup.. looks just like your REV3 800XLF... minus the PAL stuff and the extra bank and EMMU. Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted November 3, 2018 Author Share Posted November 3, 2018 Solder side: 5 Quote Link to comment Share on other sites More sharing options...
Rybags Posted November 3, 2018 Share Posted November 3, 2018 It looks like it uses Freddie (clue = 6 40 pin slots which equates to CPU, 3 custom, PIA and Freddie) Quote Link to comment Share on other sites More sharing options...
Sugarland Posted November 3, 2018 Share Posted November 3, 2018 (edited) I love the color of that board.. Is that just the plexiglass color with no dye? Or does the green come from the protective coating of which was not applied to it? Edited November 3, 2018 by Sugarland Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted November 3, 2018 Share Posted November 3, 2018 (edited) no mask applied.... I will give you a clue... encasement matters... look at where the ports connectors and joysticks line up.... remember we had that whole redesign for the XE ST and XEGS... it's not always about function... sometimes it's about form. Edited November 3, 2018 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted November 3, 2018 Author Share Posted November 3, 2018 It looks like it uses Freddie (clue = 6 40 pin slots which equates to CPU, 3 custom, PIA and Freddie) It does. As pictured here: http://atariage.com/forums/topic/139960-800xl-motherboards-variants-ntsc-pal-secam-for-dummies/?do=findComment&comment=1696101 Remember this board was done after the 800xlf, it’s just a progression on the existing Rev3 xlf board. 1 Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted July 8, 2022 Author Share Posted July 8, 2022 I was doing some checking on the bare 130XE board I have (Best Electonics' version is picture above), and noted the following differences with the EMMU when compared to the released 130XE: Freddie A14/A15 are reversed there is no clock (not sure how that works w/o a clock) Antic banking is missing Everything else is identical to the 130XE (so far...) Top is the stock 130XE, bottom is the prototype 130XE R1 XL board. Now maybe there are several wires soldered on the bottom of this board to add those functions, but I have no pictures of the bottom side. I did manage to figure out what the mess of resistors are on the bottom right below the PIA -- they are the three 3.3K pull-ups for PB2, 3 and 4 which have no location on the board. I think I have enough information now to build this thing. It's only been a decade. 2 1 Quote Link to comment Share on other sites More sharing options...
abbotkinneydude Posted October 3, 2022 Share Posted October 3, 2022 @kheller2 Hi! Any update on your 130XL board reconstruction? The lack of clock is puzzling to me. Thank you. Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted October 4, 2022 Author Share Posted October 4, 2022 On 10/2/2022 at 8:58 PM, abbotkinneydude said: @kheller2 Hi! Any update on your 130XL board reconstruction? The lack of clock is puzzling to me. Thank you. No update. It is sitting in a pile of other to get to things. I’m debating about making it 100% 130XE compatible. Quote Link to comment Share on other sites More sharing options...
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