3 Jan
2013
3 Jan
'13
12:46 p.m.
On Jan 3, 2013, at 11:36 AM, Win Heagy wrote:
When you find that the last swap changed the position
of memory error,
you know that one of these two chips has problems :o) Since you said you
have a //e, you can find 4164 as the main board memories of the //e.
4164 and 41256 are dirt-cheap at Jameco if you live in the US:
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_41662_-1
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_41398_-1
41256s are even cheaper than 4164s, presumably because the supply is
somewhat less depleted. They're both cheap in the general sense because
they were EVERYWHERE back then, so there's a lot to pull them from.
For folks restoring even older machines, 4116s are readily available
there as well for a dollar each:
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_41339_-1
I've seen arcade repair sites charging upwards of $5 each for 4116s. They
are considerably hotter and less reliable than 4164s (+12v and -5v supplies,
yuck), so it's always good to have lots of spares on hand.
- Dave