Hardware

​CPU​
​Endianness​
​Protection ring​
​UEFI Shell​
​Buses​
​Infini Band​
​Raspberry PI​
​Console​
​Arduino​
​Tutorials​
​Resolution​
CPU
CPUID to arch: https://github.com/mer-tools/oprofile/blob/master/libop/op_hw_specific.h#L119
CPU flags meaning: http://unix.stackexchange.com/questions/43539/what-do-the-flags-in-proc-cpuinfo-mean
Endianness
https://www.cs.umd.edu/class/sum2003/cmsc311/Notes/Data/endian.html
In big endian, you store the most significant byte(MSB) in the smallest address.
In little endian, you store the least significant byte(LSB) in the smallest address
Protection ring
Could not load image
UEFI Shell
https://software.intel.com/en-us/articles/uefi-shell
1
map # list disks
2
help bcfg
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Buses
VESA (Video Electronics Standards Association)
https://en.wikipedia.org/wiki/List_of_device_bit_rates
|Technology|Rate||Year| |---|---|---| |ISA 16-Bit/8.33 MHz|66.7 Mbit/s|8.33 MB/s|1984 (created)| |I²C|3.4 Mbit/s|425 kB/s|1992 (standardized)| |Low Pin Count|125 Mbit/s|15.63 MB/s [x]|2002| |HyperTransport 3.1 (3.2 GHz, 32-pair)|409.6 Gbit/s|51.2 GB/s|2008| |Unified Media Interface 2.0 (UMI 2.0; ×4 link)|20 Gbit/s|2 GB/s [z]|2012| |Direct Media Interface 3.0 (DMI 3.0; ×4 link)|40 Gbit/s|4 GB/s [z]|2015| |AGP 8×|17.066 Gbit/s|2.133 GB/s|2002| |AGP 8× 64-bit|34.133 Gbit/s|4.266 GB/s|| |PCI 32-bit/66 MHz|2.133 Gbit/s|266.7 MB/s|1995| |PCI 64-bit/100 MHz|6.4 Gbit/s|800 MB/s|| |PCI-X QDR|34.133 Gbit/s|4.266 GB/s|| |PCI Express 2.0 (×32 link)[43]|160 Gbit/s|16 GB/s [z]|2007| |PCI Express 3.0 (×32 link)[44]|256 Gbit/s|31.51 GB/s [y]|2011| |QPI (9.6GT/s, 4.8 GHz)|307.2 Gbit/s|38.4 GB/s|2014|
https://en.wikipedia.org/wiki/NVLink
Infini Band
https://en.wikipedia.org/wiki/InfiniBand
Text
SDR
DDR
QDR
FDR10
FDR
EDR
HDR
NDR
XDR
Signaling rate (Gbit/s)
2.5
5
10
10.3125
14.0625[6]
25.78125
50
100
250
Theoretical effective throughput, Gbs, per 1x[7]
2
4
8
10
13.64
25
50
​
​
Speeds for 12x links (Gbit/s)
24
48
96
120
163.64
300
600
​
​
Encoding (bits)
8/10
8/10
8/10
64/66
64/66
64/66
64/66
​
​
Adapter latency (microseconds)[8]
5
2.5
1.3
0.7
0.7
0.5
​
​
​
Year[9]
2001,2003
2005
2007
2011
2011
2014[7]
2017[7]
after 2020
future
Raspberry PI
1
/opt/vc/bin/vcgencmd measure_temp
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Console
/dev/ttyAMA0
1
Speed (baud rate): 115200
2
Bits: 8
3
Parity: None
4
Stop Bits: 1
5
Flow Control: None
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Arduino
https://www.arduino.cc/en/Products.Compare
Tutorials
http://tronixstuff.com/2013/12/12/arduino-tutorials-chapter-22-aref-pin/
Resolution
1
SQCIF = 128x96
2
QCIF = 176x144
3
QVGA = 320x240
4
CIF = 352x240/288
5
HVGA = 640x240
6
VGA = 640x480
7
2 CIF = 704x240/288
8
4 CIF = 704x480/576
9
D1 CROPPED = 704x480/576
10
D1 = 720x480/576
11
​
12
D1 (525) 720 x 480 is in NTSC
13
D1 (625) 720 x 576 is in PAL
14
​
15
720p is 1280 x 720. (921,600 total pixels)
16
1080p is 1920x1080. (2,073,600 total pixels)
17
3MP is 2048 x 1536. (3,145,728 total pixels)
18
5MP is 2560 x 1920. (4,915,200 total pixels)
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Audio

GPU

Last modified 6mo ago

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