Is there any purpose to the zero ohm resistors other than manufacturing convenience?
I have an STFM board (C070789 Rev D) that I want to fit the HD (floppy) board and the row of resistors that appear to be 'links' (L5 to L11) to the parallel port) are interfering.
Can I simply replace these with links ensuring they don't short to the ground trace below? I note that 'L' for component shorthand often indicated an inductor. Does this apply to Atari?
TIA
Zero ohm resistors?
- stephen_usher
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Re: Zero ohm resistors?
Yes, you can just replace them with header pins and a jumper.
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ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
Re: Zero ohm resistors?
They used to be RF filters in a 3 pin package. Atari used zero ohm resistors on later machines. You can wire link them instead just be careful not to short to the center pin as its gnd .
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: Zero ohm resistors?
"Lxxx" just before an external port ought to be "T filters", an "EMI LCL Filter", at least, this is mentionned on the STe schematics.
On my conversion into Kicad, I used the dedicated symbol :
Re: Zero ohm resistors?
Awesome - that makes life easy - thanks for quick response to all who replied. This looks to be a great forum!
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Re: Zero ohm resistors?
In some cases I have seen a 0 ohm resistor being used as a sort of fuse, and in those cases I have seen these fail.
But seeing the previous responces it is not likely in an Atari.
But seeing the previous responces it is not likely in an Atari.
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Re: Zero ohm resistors?
A 0 ohm resistor can also be used to add a pseduo extra layer for those one or two signals you need to route over each other. Used mostly on single sided PCBs etc.
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- rubber_jonnie
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Re: Zero ohm resistors?
Atari do tend to use links or zero ohm resistors in a few places. Look at the STE board for example. The TOS ROM Jumpers, W102, W103 & W104.
These are usually linked with the same zero ohm resistors.
As long as you're sure any replacement doesn't cause a short, a simple wire link is just the same, at least in the case of the ST.
These are usually linked with the same zero ohm resistors.
As long as you're sure any replacement doesn't cause a short, a simple wire link is just the same, at least in the case of the ST.
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800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...