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I figured it out in the end. Thank everyone for help! I used the PRG A10 and 11 for the mirroring indeed. I checked with some schematics later and found out that that was wrong. Can't believe i haven't noticed at the time because i already knew that the CHR lines are the ones used for mirroring. Dum...

I redone the whole circuit 2 times today, and each time verifying each connection with the multimeter. It works perfectly for AOROM but i still getting the same glitches for UxROM as before. I kinda tried everything. This is the schematic of the whole thing: http://www.mediafire.com/?v5n29sj8ih2uyi9...

Yes, the tiles are clean and they update as i'm scrolling. But only when CIRAM/A10 is connected to the pin 11 of the 161. When i connect it to A10 or A11 the tiles are glitched.

Yes there is a switch for each one of them. But switching on D4 doesn't seem to solve the problem. Now i try to run some test with 1943 the battle of midway rom. I works like hell! Full of glitches and all that, freezes at certain areas, sometime doesn't start at all... I can attach some photos if y...

I'm pretty sure it's not the breadboard because i got the same results with the 1st unrom conversion witch was not on breadboard. The glitches disappear when i disconnect ciram/a10 from a10&11 lines and i connect it to the pin 11 of 161 (witch is connected to the prg d3). But even the glitches d...

...Yes. And this is when the glitches kick in. No matter which of these 3 options i pick...

Thanx for the hint, it helped a lot! ;) I switched only the outputs and now it works. I forgot to mention that i used a breadboard. :) That's why i thought that it would be fine to switch the inputs too, because i thought that there would be less chances for the board to work in AOROM mode when the ...

http://www.mediafire.com/?2qlib92i086umrz .pdf
http://www.mediafire.com/?b11qr1ebo48kv4c .sch

Here is my schematic.

Is it possible? I attached some dip switches and an HC32 to my AOROM cart for and AOROM-UNROM (and the other way around) conversion. It worked, excepting for not figuring out how to solve the mirroring problem, witche caused some glitches and chaotic map stuff. :| Then I modified the whole circuit t...

Burned the pal version. Works perfectly. Thank you a lot guys!

It runs well all the aorom games i tried until now except for the Battletoads games. You mean there is a pal version of the Battletoads rom?

Thank you much! I didn't know that. Yes i'm pretty sure my machine is a pal one. So, it's nothing wrong with my cart then?I even added some dip switches to disable the hc02 and make my cart a "true AOROM" one, even though that chip is there just for avoiding some bus conflicts, and still n...

I bought a Solstice cart (ANROM) and i modified it in order to work with 256k eeproms (some scavenged w27c020 that works perfectly fine) connecting the A17 pin of the prg to the 12 pin of of the 161 and the D2 one to the 5 pin, and a bit of rewiring for the prg rom. It runs Cabal perfectly fine (you...

Solved the glitches problem once and for all. I followed Infiniteneslives' advice and decoupled all the unused pins (CHR A18 and both WE) with 10nf capacitors. I didn't use pull up/down resistors because i wasn't sure of the state of the chip while playing and i thought that decoupling with capacito...

Found the source of glitches. Bad 72pin connector. Dammed scavenged tech! Gets you all the time...