Hardware

​GPU​
​nVidia​
​AMD​
​CPU​
​Endianness​
​Protection ring​
​UEFI Shell​
​Buses​
​Bluetooth​
​Infini Band​
​Power Connectors​
​Industrial​
​UPS​
​Offline/standby​
​Line-interactive​
​Online/double-conversion​
​Raspberry PI​
​Console​
​Arduino​
​Tutorials​
​RS232 3pin​
​Resolution​
GPU
nVidia
​https://en.wikipedia.org/wiki/List_of_Nvidia_graphics_processing_units​
28nm
    Kepler  April 2012 : GeForce 700 series
    Maxwell February 2014 : GeForce 900 series
16nm
    Pascal April 5, 2016 : GeForce 10 series
12nm    
    Turing (consumer) September 20, 2018 : GeForce 16/20 series
    Volta (workstation/datacenter)
TSMC 7 nm (Professional)
Samsung 8 nm (Consumer)
    Ampere : GeForce 30 series
AMD
​https://en.wikipedia.org/wiki/List_of_AMD_graphics_processing_units#API_Overview​
OpenGL -> Vulkan
Vulkan is a low-overhead, cross-platform 3D graphics and compute API; supported since Graphics Core Next (Southern Islands) 1
GCN 1 - 2012/01 : Radeon HD 7000 series
GCN 2 - 2013/09 : Radeon HD 7790+
    28nm FM2+ "Kaveri" (2014) : A6-7400K A10-7890K
GCN 3 - 2014 : Radeon R9 285+
    28nm FM2+ AM4 "Carrizo" (2016) : A6-7480 A8-7680
    28nm AM4 "Bristol Ridge" (2016) : A6-9400 A10-9700
GCN 4 - 2016 : Radeon 400 series
GCN 5 - 2017 : Vega 10/12/20
    14nm AM4 "Raven Ridge" (2018) : Ryzen 3 2200GE
RDNA (Radeon DNA) - 2019
RDNA 2 - 2020
​
​
28nm    
    Radeon RX 400/500 series
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
UEFI Shell
​https://software.intel.com/en-us/articles/uefi-shell​
map # list disks
help bcfg
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​
Bluetooth
Technology
Rate
​
Year
Bluetooth 2.0+EDR
3 Mbit/s
375 kB/s
2004
Bluetooth 3.0
25 Mbit/s
3.125 MB/s
2009
Bluetooth 4.0
25 Mbit/s
3.125 MB/s
2010
Bluetooth 5.0
50 Mbit/s
6.25 MB/s
2016
Infini Band
​https://en.wikipedia.org/wiki/InfiniBand​
​
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
Power Connectors
​https://en.wikipedia.org/wiki/IEC_60320#Appliance_couplers
C13/C14 and C15/C16 connectors for up to 15 A[10] (IEC maximum is 10 A)
C15/C16's temperature rating is 120 °C rather than the 70 °C of the similar C13/C14 combination.
C19/C20 and C21/C22 connectors for up to 20 A[11] (IEC maximum is 16 A)
​https://en.wikipedia.org/wiki/NEMA_connector ​
Industrial
​https://en.wikipedia.org/wiki/Industrial_and_multiphase_power_plugs_and_sockets​
UPS
Offline/standby
Line-interactive
​https://youtu.be/Fj7e3WGUKO8?t=521
​
Online/double-conversion
the batteries are always connected to the inverter
Raspberry PI
/opt/vc/bin/vcgencmd measure_temp
Console
/dev/ttyAMA0
Speed (baud rate): 115200
Bits: 8
Parity: None
Stop Bits: 1
Flow Control: None
Arduino
​https://www.arduino.cc/en/Products.Compare​
Tutorials
​http://tronixstuff.com/2013/12/12/arduino-tutorials-chapter-22-aref-pin/​
RS232 3pin
[RS232簡單接法(3線)](http://flykof.pixnet.net/blog/post/24074586-rs232%E7%B0%A1%E5%96%AE%E6%8E%A5%E6%B3%95(3%E7%B7%9A))
​
Resolution
SQCIF = 128x96
QCIF = 176x144
QVGA = 320x240
CIF = 352x240/288
HVGA = 640x240
VGA = 640x480
2 CIF = 704x240/288
4 CIF = 704x480/576
D1 CROPPED = 704x480/576
D1 = 720x480/576
​
D1 (525) 720 x 480 is in NTSC
D1 (625) 720 x 576 is in PAL
​
720p is 1280 x 720. (921,600 total pixels)
1080p is 1920x1080. (2,073,600 total pixels)
3MP is 2048 x 1536. (3,145,728 total pixels)
5MP is 2560 x 1920. (4,915,200 total pixels)

DevOps

Android/iOS

Last updated 2 months ago

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

	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