# HG changeset patch # User Paul Boddie # Date 1384646440 -3600 # Node ID 5c69742b0242be7a1bb767eac47d3b150ac2cec8 # Parent 3a232720114156934a9c2e9c935557770ba3e404 Added Unicorn Electronics references for RAM and CPU chips. diff -r 3a2327201141 -r 5c69742b0242 ULA.txt --- a/ULA.txt Fri Jul 05 01:07:38 2013 +0200 +++ b/ULA.txt Sun Nov 17 01:00:40 2013 +0100 @@ -148,6 +148,11 @@ RAM Integrated Circuits ----------------------- +Unicorn Electronics appears to offer 4164 RAM chips (as well as 6502 series +CPUs such as the 6502, 6502A, 6502B and 65C02). These 4164 devices are +available in 100ns (4164-100), 120ns (4164-120) and 150ns (4164-150) variants, +have 16 pins and address 65536 bits through a 1-bit wide channel. + The documentation for the Electron mentions 4164-15 RAM chips for IC4-7, and the Samsung-produced KM41464 series is apparently equivalent to the Texas Instruments 4164 chips presumably used in the Electron. @@ -187,6 +192,8 @@ See: TM4164EC4 65,536 by 4-Bit Dynamic RAM Module http://www.datasheetarchive.com/dl/Datasheets-112/DSAP0051030.pdf +See: Dynamic RAMS + http://www.unicornelectronics.com/IC/DYNAMIC.html See: KM4164B 64K x 1 Bit Dynamic RAM with Page Mode http://images.ihscontent.net/vipimages/VipMasterIC/IC/SAMS/SAMSD020/SAMSD020-45.pdf See: NTE2164 Integrated Circuit 65,536 X 1 Bit Dynamic Random Access Memory