steeve_mad Posted November 27, 2014 Share Posted November 27, 2014 (edited) I'm having an issue with my mod , i double and triple check my wire connection with a multimeter , i see no problem there The built-in game work fine , but when i insert a real cart and flip the switch i get a garbage screen , i might have mess with the slot wiring Somebody can confirm if my wiring from the slot is good First row 13 - 24 Sec rom 12-1 Edited November 27, 2014 by steeve_mad Quote Link to comment Share on other sites More sharing options...
Shawn Posted November 27, 2014 Share Posted November 27, 2014 cart port wires look clean enough, hows the pcb soldering on the main board? You sure you didn't mix up any of the lines by mistake? 1 Quote Link to comment Share on other sites More sharing options...
steeve_mad Posted November 27, 2014 Author Share Posted November 27, 2014 (edited) yes , i followed each number on the motherboard to the cart slot and they match this is how i numbered my wiring , i think it's correct Edited November 27, 2014 by steeve_mad Quote Link to comment Share on other sites More sharing options...
runpie1 Posted November 30, 2014 Share Posted November 30, 2014 i have the same problem, and i have the exact same flashback 2 motherboard as you. in my opinion, it might be the jumper wires, but im not sure if i am wiring the jumper wires correctly; which is why you might have the same problem? Quote Link to comment Share on other sites More sharing options...
AceHart Posted December 4, 2014 Share Posted December 4, 2014 (edited) ...but when i insert a real cart and flip the switch... You say "the switch", as in one. Is it a double pole or a single? Or more to the point: There are two connections that need to go through a switch; one will be normally closed*, and the other normally open for on-board games; and obviously the first will be open and the second will be closed for cart. games. I don't remember which ones; it's been a while since I've done my mod. I just want to make sure you were aware there are two connections, not one, that need to go through a switch. *there is a jumper (it looks more like a resistor to me, though - a zero-ohm resistor?) on the board that needs to be removed, and this circuit will go through the switch. I removed that part, but I still actually ran the circuit through it, but I think that was just silly. But it works. Edited December 4, 2014 by AceHart Quote Link to comment Share on other sites More sharing options...
runpie1 Posted December 5, 2014 Share Posted December 5, 2014 (edited) Which jumper (or zero ohm resistor) is it that needs to be removed? Is it the "R5" jumper lead? Edited December 5, 2014 by runpie1 Quote Link to comment Share on other sites More sharing options...
runpie1 Posted December 5, 2014 Share Posted December 5, 2014 i figured it out. i had to remove j9? Quote Link to comment Share on other sites More sharing options...
steeve_mad Posted December 5, 2014 Author Share Posted December 5, 2014 i have 3 terminal on my switch on/on one side j9 , middle ground and the next one j3 jumper is removed from j9 Quote Link to comment Share on other sites More sharing options...
runpie1 Posted December 8, 2014 Share Posted December 8, 2014 It still isnt working for me, not sure what im doing wrong now either. But everytime i wire up the cartridge port, i get completely no signal, even when i toggle the swith. i will update you as i figure out the problem Quote Link to comment Share on other sites More sharing options...
AceHart Posted December 8, 2014 Share Posted December 8, 2014 (edited) This might be helpful, although the pictures are of the older rev. board, not the one you & I have: http://www.atarimuseum.com/fb2hacks/page1.htm If I am able, I'll check what I did. I have no desire to dissassemble my FB2 again, but I think I may have some notes somewhere. Maybe.. Edited December 8, 2014 by AceHart Quote Link to comment Share on other sites More sharing options...
runpie1 Posted December 9, 2014 Share Posted December 9, 2014 my board broke, one of the contacts lifted. (Guess ill be ordering another one) Quote Link to comment Share on other sites More sharing options...
+wongojack Posted December 9, 2014 Share Posted December 9, 2014 my board broke, one of the contacts lifted. (Guess ill be ordering another one) FYI - I pulled up a few pads here and there, but probing around directly on the center chip helped me find some alternate points for contact. Here are some helpful threads: http://atariage.com/forums/topic/183250-fb2-cart-port-workaround/ http://atariage.com/forums/topic/189685-right-in-the-middle-of-my-fb2-mod-quest-about-onboardcart-switch/ Quote Link to comment Share on other sites More sharing options...
AceHart Posted December 10, 2014 Share Posted December 10, 2014 Here are some helpful threads: http://atariage.com/forums/topic/183250-fb2-cart-port-workaround/ Now that's MUCH better than any notes I had. And a great picture too. I do have some comments, though: (1) I recommend using a DPDT switch: One pole will switch between which jumper to use, and the other to switch the recommended wire to IC2 pin. The exact jumpers to switch are labeled on the board; and by the way, the are not the same as the earlier rev. (2) Consider adding a momentary switch or button to activate the reset. I did not do that - I wish I had known about it. This beats cycling power to change games. Quote Link to comment Share on other sites More sharing options...
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