Are you sure the 6550 is dead? (was: Mos Technology RAM wanted) - test-drb@ccmp.vtda.org

21 Mar 2000

On Mar 21, 23:04, Allison J Parent wrote:
...
  <> Are these single voltage or multiple?  4k? 
22pin?  sounds like the
 <> semi-4600 and NEC D410 parts, a 4k pseudostatic 200ns cycle and access
 <> under 120ns.  I've got a rat load of upd410s.  The moto part number
 <> doesn't compute though.
 <
 <uPD410 is 18-pin 0.3" width, 4k x 1, with one ~CE line (the MOS
Technology
...
  <MCS6550 has 2 ~CS and 2 CS lines and it's
0.4" wide).  I can't find any
 <data on a 4600 but I assume it's similar. 
...
  uPD410 .4" 22pin three voltage 4Kx1, seperate din
and dout, CE and CS/ three
...
  voltage pseudostatic.  replaces Semi-4200 and 4402,
fastest version to 80ns
...
  access. (it was a screamer for 1978). 
Oops, I misread the data book -- you're right of course, uPD410 is .4"

-- 

Pete						Peter Turnbull
						Dept. of Computer Science
						University of York