While perusing a set of schematics for ideas (yes, I'm that sad) I came across a recurring (use of) a symbol I couldn't make head of tail of:
The symbol I'm referring to is the circle with a diagonal cross through it. I initially presumed the designer of said schematic liked to put a bunch of lamps on their boards for some reason given that was my understanding of the meaning of said symbol. That doesn't make sense in the above context so how am I to interpret this..?
Left to right:
-R9 is a three pin network resistor pulling lines 10 and 9 up to 5v?
-R13 is a nine pin network resistor pulling eight lines up to 5v?
...and so on...
...the final image just being a standard resistor, or part of a larger R9 network also pulled up to 5v..?
My assumption being the symbol I thought of as a 'lamp' is used here to denote a connection... How close / far am I from making sense of this?
Many thanks.
PS
In case any are wondering it's a schematic for an Apple II Z80 board whose workings I'm trying to figure out - yep, that sad!
The symbol I'm referring to is the circle with a diagonal cross through it. I initially presumed the designer of said schematic liked to put a bunch of lamps on their boards for some reason given that was my understanding of the meaning of said symbol. That doesn't make sense in the above context so how am I to interpret this..?
Left to right:
-R9 is a three pin network resistor pulling lines 10 and 9 up to 5v?
-R13 is a nine pin network resistor pulling eight lines up to 5v?
...and so on...
...the final image just being a standard resistor, or part of a larger R9 network also pulled up to 5v..?
My assumption being the symbol I thought of as a 'lamp' is used here to denote a connection... How close / far am I from making sense of this?
Many thanks.
PS
In case any are wondering it's a schematic for an Apple II Z80 board whose workings I'm trying to figure out - yep, that sad!
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