Reply 20 of 40, by weedeewee
Just thought of the extra 8 dip 20's you have...
they are also present on the neat-sx board, but they are part of bank0 and 1, just look at the image
the top row of sockets are a combined dip18 & dip 16, the following two rows are combined dip 20 & dip18 & dip 16.
That would mean that to use the 8 separate dip20 sockets on your board, you would have to remove all 36 chips ,
( and Maybe you'll have to find out which of those sockets is there for the parity bit
and place a 1Mbit chip in the four sockets that are responsible for the parity bit. If you're using the dip20 sockets with 256K @4bit each, since I doubt a 512Kbit chip exists. )
I'm not quite sure of this though since the memory layout for the neat-sx shows the use of 256Kbit chips as not requiring any parity chips... Which I think is wrong, but I can't test it since I lack the chips :-p
Also the microhouse layout for the neat-sx is a bit off since it shows 10 rows of sockets, while only 9 rows of combined sockets are actually present .