Need help with AOROM (27c010) rewiring

This is an archive of a topic from NESdev BBS, taken in mid-October 2019 before a server upgrade.
View original topic
Need help with AOROM (27c010) rewiring
by on (#151328)
Im little confused with rewiring the 27c010 to a AOROM donor board.


The Pin out for 1,2, 22, 24, 30, 31,32 are different comparing The 27c010 Eprom with the pinout of the PRG-ROM (see pic) :

( Leftside : PRG-ROM Pinout Right Side : 27c010 eprom
Image

How to rewire the eprom with the AOROM Board / 27c010 Chip ?

My guess so far :
Wire from Hole 1 ( to Pin 30)
Wire from Hole 24 ( to Pin 2 )
Wire from Hole 22 ( to Pin ?? )
30,31,32 ???

Thanks a lot for helping !
Re: Need help with AOROM (27c010) rewiring
by on (#152094)
Quite simple.
Bend up pin 1, 2 ,24, 30, 31

Pin 1 not connected
Pin 2 to Hole 24 (A16)
Pin 24 to Hole 16 (GND)
Pin 30 not connected
Pin 31 not connected

NC always means not connected.
A16 is the highest Address line for 27c010.
Nothing goes to Hole 1.

Also, you only need to bend up pin 22 when using CHR-ROM. ;)

EDIT. Pin 32 goes down to hole 32 as VCC is 5V.
Re: Need help with AOROM (27c010) rewiring
by on (#152353)
Thank you for the tip, IceMan
Will try it out later