exxos's Atari, Amiga & retro forum

Hi all,

I have a C103414 board with the original NEC 4242256-12 chips. I just want to upgrade to 1Mb. Does anyone knows a source for these chips (NEC 424256-12 or equivalent). I believe i just need the chips as the capactiors are all there right? Thanks for the help!

richardson

there are chips at the exxos webstore :-)

however, it says that capacitors are sold separately but i think my motherboard have those capacitors already, doesnt it? (photo attached)

I did post check the store then deleted it as couldn't check there was SMT RAM in the store :roll:

Looks like you have the caps so you don't need them :)

hi all,

i soldered last night the 4 chips for 1mb upgrade but sysinfo did not find them (bought them from Exxos). i checked the contacts and they loked fine to me but tomorrow i will take the board to a microscope. There were 3 resistors though that i had no clue where to use them. Could it be related?Many thanks!

All the resistors are as show in this image.. to the left of the PSU connector... https://www.exxosforum.co.uk/forum/viewt ... 870#p28215

all good! there was some legs in which the solder didnt stick. all good now!!! 1MB :-)

:bravo: