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The only videos that explain the basics of serial communication (start, data, parity, stop bits, framing, signal levels, etc) seem to be done by these indian/asian guys teaching electronics courses on youtube. They have horrible presentation style and a thick accent. (If their presentation style was
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There isn't anything out there showcasing the evolution/variation in keyboards among terminals before everything became defacto IBM 101 key keyboards. (Although there are keyboard keyswitch fetishist videos out there, it's really switch porn, they don't explain anything about what makes the switches
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While there are some teardown videos of terminals, there isn't any discussion of the architecture of a terminal and how it parallels the architecture of a microcomputer. A number of terminals are designed around a main bus motherboard with options and elements of the terminal as cards plugged into
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While there are lots of teletype porn videos out there, again hardly any of them explain how anything works. Watching something operate is more interesting if someone is explaining to you what you are seeing and how it works together. Otherwise it's just 2 minutes of "wow, that is a loud machine
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Terminals can exhibit some interesting digital circuit design ideas. The B100 is basically a giant microcoded state machine design built out of discrete logic and a PROM for the microcode. This is a general design technique that is still applicable today, even if you would plop it all inside an
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There is nothing that explains control codes and dumb terminals vs. smart terminals. Mixed in with that you'd want to add a discussion of padding needed to give terminals time to process and how it relates to TERMCAP
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There isn't any discussion of how technology and terminology of serial communications evolved from manual telegraphs to telegraph machinery to teletype machinery to serial communication between digital
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There is nothing explaining interactive vs. block mode terminals and how they define forms with fields, etc. (A little bit of this appears in the defcon style hack tn3270 videos, though.)
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FPGA instead of discrete logic chips. There is also a Basic Four terminal that is implemented with discrete logic, but I can't recall if it is done as a microcoded state machine as well.
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OK/good, I wouldn't mind the accent.) The end result is as if you are attending a shitty rural community college getting substandard education.
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There isn't anything out there demonstrating the composite video overlay/underlay hacks with the VT100 advanced video option.
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the motherboard (Tek 401x, HP 264x, VT1xx to a certain extent, etc.)
227:Evolution of modifiers (alt, shift, control, meta)
99:Serial communications links between computers
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31:Identified gaps in existing video content:
210:Extended national language characters
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260:Architecture of a Printing Terminal
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185:Architecture of a Video Terminal
193:Discrete logic control circuit
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265:Architecture of Teletypes
207:ASCII printing characters
81:Telegraph communication
76:Serial Communication
232:Communication ports
84:Telegraph equipment
90:Teletype equipment
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244:Integral printer
177:Interactive mode
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71:Video Outlines
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27:Existing Gaps
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18:User:Legalize
241:Peripherals
224:Editing keys
215:Control keys
141:Serial ports
102:Synchronous
93:Current loop
55:that types".
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156:Parity bits
147:Characters
96:Baudot code
51:different.)
180:Block mode
150:Start bits
87:Mark/Space
201:Keyboard
159:Stop bits
153:Data bits
250:Joystick
167:Ethernet
164:Packets
144:Framing
36:devices.
138:Modems
131:RS-485
128:RS-449
125:RS-423
122:RS-422
119:RS-232
253:Dials
16:<
190:CPU
170:X.25
111:X.25
108:HDLC
105:SDLC
66:etc.
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