A600 2mb chip ram hack

For the 2mb hack , can i use an original par of ram chips from a dead A600 board?

nec 424260-80

as they are 512k x 2 i would of thought so?

Yes..tried and tested.

Will dig those manuals out when i get chance mate :thumbsup:

excellent :-) ;)

from what i can gather..

all the legs are connected except..

(June bug 1.3 rev)

LCAS to pin 35 (exp connector)
UCAS pin 36 (exp connector)

AND / OR

RAM pins 28 & 29 go to the mobo as in pic ??

I cannot recall as it was a long time ago i did mine, i know Zetro did a tutorial on here somewhere.

Be aware that there are differences in the hack between rev 1.3 and rev 1.5 boards.

I have soldered both RAM IC's on U16, was way easier to solder :).

how much ram does that give you spock79 >?

---------- Post added at 11:30 ---------- Previous post was at 11:29 ----------

oh i see both extra ram chips are towered on to the one :-)

---------- Post added at 11:32 ---------- Previous post was at 11:30 ----------

Whats the short jumper wire for spock?

(pics below from A1K.org)

Okay all soldered up ...

slight problem..i get 1351304 chip ram..

as this is a 1.3 A600 do i need to connect the ram wires elsewhere?

or have i made a boo boo somewhere along the lines?

As you can see i have mounted both chips on one ram chip.

All the pins (legs) pass a continuity check - my flash makes it look rougher that it really is.

only 1.3 mega free?

verify all or boot from floppy, please

that is from floppy :-)