At 12:48 9.10.2001 +0200, Nir Dary wrote: >i have no clue how to proceed... I have: 1) Scratch all the connections on the 'connector board' which were going up to original cart. Just for sure. 2) Measure this. Front of 'connector board', from the left: S B02 - pin 5 & 6 of 7402 R r/w - unconnected P A10 - pin 23 of 27c010 N A11 - pin 25 of 27c010 M D7 - pin 16 of 27c010 pin 6 of 74164 L D3 - pin 17 of 27c010, pin 4 of 74174 K A12 - pin 26 of 27c010 J A9 - pin 27 of 27c010 H A8 - pin 8 of 27c010 F A7 - pin 9 of 27c010 E A6 - pin 10 of 27c010 D A5 - pin 11 of 27c010 C A4 - pin 12 of 27c010 B GND - too many A RD4 - unconnected Back of 'connector board', from the left: (turn it face to you) 1 /S4 - unconnected 2 A3 - pin 29 of 27c010 3 A2 - pin 28 of 27c010 4 A1 - pin 27 of 27c010 5 A0 - pin 26 of 27c010 6 D4 - pin 20 of 27c010 7 D5 - pin 19 of 27c010 8 D2 - pin 17 of 27c010, pin 14 of 74174 9 D1 - pin 13 of 27c010, pin 3 of 74174 10 D0 - pin 14 of 27c010, pin 4 of 74174 11 D6 - pin 12 of 27c010 12 /S5 - pin 9 of 27c010 13 +5V - too many 14 RD5 - pin 2 of 7402 15 /CCTL - pin 7 of 7402 Other ocnnections: 27c010, pin 1 - +5v 27c010, pin 2 - 74164, pin 5 27c010, pin 3 - 74174, pin 2 27c010, pin 22 - gnd 27c010, pin 28 - 74174, pin 12 27c010, pin 29 - 74174, pin 15 27c010, pin 30 - +5v (or try to leave it unconnected?) 27c010, pin 31 - +5v 27c010, pin 32 - +5v 74174, pin 8 - gnd 74174, pin 14 - 7402, pins 11 & 12 74174, pin 9 - 7402, pin 1 74174, pin 16 - +5v 74174, pin 1 - it should go to R1 & positive side of condensator (The other side of R1 to +5v) 7402, pin 7 - gnd 7402, pin 4 - 7402, pin 9 7402, pin 10 - 7402, pin 2 and 3 7402, pin 14 - +5v Condensator Negative to the GND & Positive to pin 1 of 74174 pin 1 of 74174 is not connected to gnd 3) If you don't find any problem with the above, try unsoldering the wires from the cartridge connector until it starts to boot with dumper inserted. You just must to find where the bug is... Jindroush (kubecj@asw.cz) For Atari utilities look here: http://www2.asw.cz/~kubecj (jindroush.atari.org)