I'm writing an academic text in American English. I'm not sure about the compound words:

DB-9 connector
end-of-packet
16-bit registers
Avalon-MM slave interface
RS-232 interface
Bidirectional full-duplex communication
MSB (bit 7)
transmitted LSB (​bit-0​) first
endofpacket or end-of-packet?
32-bit system
provability-checking algorithm
the model checker (or "the model-checker"?
I / O, i/o or I/O ?
base-case or basecase or base case?

I feel it's been difficult to know where to place the hyphen, if anywhere.

I'm writing an academic text in American English. I'm not sure about the compound words:

DB-9 connector
end-of-packet
16-bit registers
Avalon-MM slave interface
RS-232 interface
Bidirectional full-duplex communication
MSB (bit 7)
transmitted LSB (​bit-0​) first
endofpacket or end-of-packet?
32-bit system
provability-checking algorithm
the model checker (or "the model-checker")?
I / O, i/o or I/O ?
base-case or basecase or base case?

I feel it's difficult to know where to place the hyphen, if anywhere.