[tlug] DRAM Refresh

[Curt Sampson <cjs@example.com>]

<https://www.farnell.com/datasheets/1905614.pdf> is a datasheet for a
4164 dynamic RAM which is, IIRC, typical of DRAM parts from late 70s
and early 80s microcomputers such as the Apple II and the Atari 800.

>From the first page:

> Refresh period is extended to 4 milliseconds, and during this period
> each of the 256 rows must be strobed with RAS in order to retain
> data.

Just sayin'. :-)

cjs
-- 
Curt J. Sampson      <cjs@example.com>      +81 90 7737 2974

To iterate is human, to recurse divine.
    - L Peter Deutsch