EPROM pin swapper by Farid

[jpx72]

I really had to post this link here, may be VERY usefull for repro-makers:
http://nesdev.parodius.com/bbs/viewtopic.php?t=8633

[Drakon]

Holy s#it this's awesome!  So it converts the dump so when you burn it it'll be fully nes maskrom compatible?

[jpx72]

Almost, you cannot swap VCC (+5V), VSS (GND), CE and OE (and other "special pins" like VPP), this thing can only swap adress and data lines, as far as I know

[Drakon]

Almost, you cannot swap VCC (+5V), VSS (GND), CE and OE (and other "special pins" like VPP), this thing can only swap adress and data lines, as far as I know

Oh so it saves you maybe 2 wires....smeh I'd rather just rewire.

[jpx72]

Well there are more situations, most often there are at least 3-4 pins to be left untouched, but there are even more with RROM. Or, in case of Japanese SMS games, you can save almost every pin!

[famifan]

what is this thing actually doing?

[Drakon]

what is this thing actually doing?

Switching the rom data so that when you burn it it rearranges the pinout so the eprom is closer to the maskrom pinout making it so you have to do less rewiring.

Sheesh isn't that obvious enough?  

Really I have no idea how exactly it works because I can make two pins a11.  Heck I can make all of them a11 haha

[jpx72]

Heh you can select A11 on more than one pin but that will not work
Farid just haven't included this restriction.
It re-arranges the data in rom to be read in other than standard way.

[80sFREAK]

Farid's projects are very unusual and quite impressive