[SunHELP] SBusFPGA V1.2 status (Was: SBusFPGA update: USB Host, 256 MiB DDR3 RAM disk, ... )

[Brad Walker]

nice!

On Sat, Feb 26, 2022 at 2:48 AM Romain Dolbeau <romain at dolbeau.org> wrote:

> Le dim. 22 aout 2021 C  15:03, Romain Dolbeau <romain at dolbeau.org> a
> C)crit :
> > Following up on a previous post...
>
> New status update on the SBusFPGA <https://github.com/rdolbeau/SBusFPGA>.
>
> Hardware version 1.2 was made some months ago, featuring more interrupt
> lines, a proper USB connector for the USB OHCI Host Controller (with power
> support, but SBus power is quite limited so an external self-powered hub is
> still a good idea), and a Pmod connector to simplify trying out new stuff.
>
> On the gateware/software side, the micro-sd device is now supported R/W in
> NetBSD and R/O in the PROM; so it's possible to boot NetBSD on the SS20
> directly from the micro-sd :-)
>
> I also have a custom PMod outputting VGA limited to 2-bits per color
> channel (so not pretty, but for testing it's OK). It enabled me to create a
> framebuffer device capable of emulating a cg3, cg6 or bw2 with arbitrary
> (but fixed) resolution up to 1920x1080. cg6 includes just enough
> acceleration (with a micro-coded VexRiscv core) to support the PROM, NetBSD
> console and NetBSD X11/EXA acceleration. The Pmod interface is not enough
> to get a 'proper' display, but with the internal device working it's just a
> PCB redesign away from getting proper VGA and/or HDMI...
>
> Latest device is an I2C bus so I can have a temperature sensor on a PMod
> and monitor how hot the SS20 gets.
>
> Cordially,
>
> --
> Romain Dolbeau
> _______________________________________________
> SunHELP maillist  -  SunHELP at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/sunhelp