From b8e0d8fc5b40a9a1c7f78650e26e7359faaa806d Mon Sep 17 00:00:00 2001 From: Jet Hughes Date: Sat, 23 Jul 2022 23:14:14 +1200 Subject: [PATCH] vault backup: 2022-07-23 23:14:14 --- content/notes/04-computer-architecture.md | 24 ++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/content/notes/04-computer-architecture.md b/content/notes/04-computer-architecture.md index ad1cac632..61f34741a 100644 --- a/content/notes/04-computer-architecture.md +++ b/content/notes/04-computer-architecture.md @@ -47,4 +47,26 @@ tags: - made from capacitors - used where large amount of RAM is needed - slower than SRAM -- inexpensive \ No newline at end of file +- inexpensive + +## Non-Volatile Memory +- often called ROM (read only memory) + - can also be called PROM, EPROM, EEPROM, FLASH +- flash + - uses floating-gate flash cells, not quite a transistor + +# ALU +![](https://i.imgur.com/wLJhTSG.png) + +- performs arithmetic + - add, subtract, etc. +- logical operations + - and, or, shift, etc +- subunits + - lofical operations + - addition + - multiplication and dividion + - shifting + - comparison + - logical tests (if, >0, <0, =0, <=0, etc) + - \ No newline at end of file