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PostPosted: Mon Oct 31, 2022 7:16 pm 
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Location: Glasgow, UK
UPDATE:

Everything has moved now...

Repository: https://github.com/WolfNet-Computing/WolfNet-65C02-WBC
Website and Docs: https://wolfnet-computing.github.io/WolfNet-65C02-WBC/


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PostPosted: Tue Nov 01, 2022 12:39 am 
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Joined: Fri Aug 30, 2002 1:09 am
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GARTHWILSON wrote:
DarkestSoul1992 wrote:
  • 65SIB port.

A few here on the forum have put 65SIB ports on their SBCs. I put one on my workbench computer, and then the first time I made a 65SIB device, without doing a custom PCB, I found that it was a lot of work to wire up all the connections for the two connectors and do the voltage translation for 3.3V parts. I decided right away that I need to make a little board to take care of that and offer it to others as well, and I'm finally getting to it. I have the board laid out but not thoroughly checked and made yet. It will have several stuffing options, incorporating the regulators and optional voltage translation, and have the mounting and connector holes spaced to be friendly to plugging it into perfboard with a .100" grid if desired, also an SPI-10 connector option (so an SPI-10 module could also be a device on the 65SIB chain). There's room for shrouded connectors with ejector hooks. It's completely thru-hole, and with some cramming, got it into 2.850"x1.092". The shrouded 20-pin headers with ejector hooks are the biggest space hogs, taking more than half the board. You could of course also substitute the simpler 20-pin headers with no shrouds or ejector hooks if desired.

Since you bring the topic back up... I should mention that this PCB is finished, available, and is on the front page of my site, with a data sheet linked.

On your page, you wrote,

Quote:
  • 65SIB port for interfacing with external components via SPI for example. This allows for expansion cards, plugin boards and other things similar to these.

You can use it for expansion cards and plugin boards in the computer itself, but the original intended purpose was for interfacing to external equipment on the workbench, as you put in the first part of that line. Part of the inspiration was IEEE-488 (HP-IB), an external interface bus, used by hundreds, maybe thousands, of models of various kinds of electronic test equipment and instrumentation from many manufacturers. 65SIB is simpler for the hobbyist to understand, has autoaddressing, and accommodates a wide range of synchronous-serial devices, from dumb shift registers like the 74xx595 and '165, to smarter SPI and Microwire (and similar) devices, up to more-intelligent devices with autoconfiguration and auto-identification capabilities (although most users won't have any reason to use, or even be aware of, that level of capability).

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