vault backup: 2022-07-27 18:24:34

content/notes/05-crypography.md

@@ -4,6 +4,9 @@ aliases:
 tags: 
 - lecture
 - comp210
+sr-due: 2022-07-30
+sr-interval: 3
+sr-ease: 250
 ---
 
 # news

content/notes/comp-210.md

@@ -33,6 +33,6 @@ No final exam
 - [01-big-picture](notes/01-big-picture.md)
 - [02-concepts-and-roles](notes/02-concepts-and-roles.md)
 - [03-threats-social-engineering-and-failures](notes/03-threats-social-engineering-and-failures.md)
-
+- [05-crypography](notes/05-crypography.md)
 
 # Archive

content/notes/cosc-204.md

@@ -23,6 +23,7 @@ tags:
 - [transistors](notes/transistors.md)
 - [demultiplexor](notes/demultiplexor.md)
 - [sequential-circuits](notes/sequential-circuits.md)
+- 
 
 - Hardware
 - Assembly

content/notes/memory.md

@@ -9,4 +9,27 @@ Computer memory is a series of switches (similar to the switchboard in a house).
 
 (High level) Programming languages allow us to name some of the locations using variables. this is easier than remembering the number of each "switch"
 
-These switches are mostly located in RAM. 
+These switches are mostly located in RAM. But there are also switches within the CPU called registers
+
+# SRAM
+Static ram is:
+- made from flip flops.
+- mostly used in the cpu cache or anywhere where only a small amout of memory is needed. 
+- comparatively expensive to DRAM
+
+# DRAM
+Dynamic ram is:
+- made from capacitors
+- used where a large amount of memory is needed
+- slower than SRAM
+- inexpensive
+
+# Non volatile memory
+This is often called ROM (read only memory)
+- can also be called PROM, EPROM, EEPROM, FLASH (floating-gate flash cells not transistors )
+
+# Registers
+- Registers are memory cells with names within the CPU. 
+- They hold data instructions or CPU status.
+
+