20 Jan
2003
20 Jan
'03
6:03 a.m.
On Monday 20 January 2003 12:02 am, ben franchuk wrote:
Since I am building a classic TTL style computer, what
was the access
and cycle time of core memory before it vanished and just when did it do
that? Also when did 74LS come out? I am aiming for late 70's early 80's
time frame here since this looks to be the transition stage from the the
old to the new. Ben
My 1975 core memory products catalogue ( Philips components ) lists modules
with cycle times ranging from 0.65 to 1.5 us ,both for 8kx18 stacks.
My newest core memory stack sits in my Philips P856 : dated 1980, cycle time
unknown.
My own TTL computer, dated 1986, just uses 8kx8 SRAMs......
Jos Dreesen