SD Card Coding - IO from Scratch Extra

In my main channel video I interface the SD card and show an abridged version of the coding. This is the longer edit with an extra bit of intro.

0:00 Introduction
0:22 Preamble
0:56 Tutorial reference
1:36 Power up Sequence
3:58 Sending Commands
5:12 Initialization Flowchart
6:03 CMD0 (Go Idle)
9:52 CMD8 (Send IF Cond)
12:48 CMD8 Fail?
13:14 Try another card
14:16 CMD58 (Read OCR)
16:38 Tidy Up
19:04 ACMD41 (SD Send Op Cond)
23:44 SD_Init
24:42 CMD17 (Read Single Block)
30:41 Read Success!
33:27 Write test code
34:09 CMD24 (Write Block)
37:56 Write Success!
38:13 A more interesting Test
39:12 Outro

The Tutorial I was translating for my cpu: http://www.rjhcoding.com/avrc-sd-inte...