Omnibus.

This is the right place to discuss on how to implement hardware vsync, adding a VIA or AY chipset, puting multiple roms, or how to design a new flash expansion card.
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Silicebit.
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Omnibus.

Post by Silicebit. »

The schematic diagram of Omnibus is finished!!
Omnibus schematic.
Omnibus schematic.
OmniBus.png (43.62 KiB) Viewed 451 times
Now, I must to design the PCB. :)
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Silicebit.
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Re: Omnibus.

Post by Silicebit. »

With Omnibus we’ll have to be more careful. For example, we can't plug the Microdisc controller and Erebus at a time, both devices have an EPROM and both put low level in the /ROMDIS line. Two EPROMS at a time will not work.
Last edited by Silicebit. on Sun Jun 14, 2020 6:26 pm, edited 1 time in total.
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kenneth
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Re: Omnibus.

Post by kenneth »

Nice project !
It could be interesting to put a diode for each connector on the i/ocontrol pin, that will avoid the level conflict. This will allow the interfaces to exploit its memory area on page 3, if the result is not convincing, we can provide a parallel bridge at each diode. 8)

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Badger
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Re: Omnibus.

Post by Badger »

Now I would be interedted in 1 of these :)
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Silicebit.
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Re: Omnibus.

Post by Silicebit. »

kenneth wrote:
Sun Jun 14, 2020 6:19 pm
Nice project !
It could be interesting to put a diode for each connector on the i/ocontrol pin, that will avoid the level conflict. This will allow the interfaces to exploit its memory area on page 3, if the result is not convincing, we can provide a parallel bridge at each diode. 8)
Feasible, but I must test it before. :)
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Symoon
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Re: Omnibus.

Post by Symoon »

With all those extensions, it feels like you guys are building a desktop Oric.

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Dbug
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Re: Omnibus.

Post by Dbug »

Symoon wrote:
Fri Jun 19, 2020 10:38 am
With all those extensions, it feels like you guys are building a desktop Oric.
Technically, it's more like making the Oric do what the Apple II had from the start: Slots for expansion boards inside the case :)

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Vyper68
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Re: Omnibus.

Post by Vyper68 »

Nice work there Silicebit :D

When it comes round to a waitlist or production I definitely want one of these.
Bazinga!

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