[rescue] A SBus card for SPARCstation designed in 2020...

[Chase Rayfield]

Your issue of the card only working with a warm boot is why I was thinking
using a 5V tolerant CPLD from Atmel for the level conversion.
You would put all the bus interfacing and rom in the CPLD... meaning basically
instant startup, and the big FPGA could take its sweet time.

congrats on getting it working!,Chase Rayfield
    On Sunday, December 13, 2020, 1:00:03 PM EST, <rescue-request at sunhelp.org>
wrote:

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Today's Topics:

B  1. A SBus card for SPARCstation designed in 2020... (Romain Dolbeau)
B  2. Re: A SBus card for SPARCstation designed in 2020... (Richard)
B  3. Re: A SBus card for SPARCstation designed in 2020...
B  B  B  (Romain Dolbeau)
B  4. Re: A SBus card for SPARCstation designed in 2020...
B  B  B  (Romain Dolbeau)


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Message: 1
Date: Sat, 12 Dec 2020 19:12:54 +0100
From: Romain Dolbeau <romain at dolbeau.org>
To: The Rescue List <rescue at sunhelp.org>, sunhelp
B B B  <sunhelp at sunhelp.org>
Subject: [rescue] A SBus card for SPARCstation designed in 2020...
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B B B  <CADuzgbpJUQYwmLZa=Uj+otFxqNsXkkRRehgDGMvCUAirMypinA at mail.gmail.com>
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Following up on my own idea, this might interest some people on these lists:

Le jeu. 17 sept. 2020 CB  15:29, Romain Dolbeau <romain at dolbeau.org> a C)crit
:
> The motivation - I'm kind of wondering how much efforts it would take
> to put a modern [not-so-]small FPGA on a SBus card

The answer is not as much as I expected. I've posted my current status
on an electronic engineering forum where I had found some help:

<https://www.eevblog.com/forum/vintage-computing/a-sbus-card-for-sparcstation
-designed-in-2020/>

Short version: I now need to figure out how to write a driver in NetBSD :-)

Cordially,

--
Romain Dolbeau


------------------------------

Message: 2
Date: Sun, 13 Dec 2020 08:49:24 +1100
From: Richard <ejb at trick-1.net>
To: The Rescue List <rescue at sunhelp.org>
Cc: sunhelp <sunhelp at sunhelp.org>
Subject: Re: [rescue] A SBus card for SPARCstation designed in 2020...
Message-ID: <0ED41863-0512-4C52-913A-73811AA31AD0 at trick-1.net>
Content-Type: text/plain; charset=utf-8

Thatbs awesome! Will you release the design once done?

Sent from my iPhone

> On 13 Dec 2020, at 05:13, Romain Dolbeau <romain at dolbeau.org> wrote:
>
> o;?Following up on my own idea, this might interest some people on these
lists:
>
> Le jeu. 17 sept. 2020 CB  15:29, Romain Dolbeau <romain at dolbeau.org> a
C)crit
> :
>> The motivation - I'm kind of wondering how much efforts it would take
>> to put a modern [not-so-]small FPGA on a SBus card
>
> The answer is not as much as I expected. I've posted my current status
> on an electronic engineering forum where I had found some help:
>
>
<https://www.eevblog.com/forum/vintage-computing/a-sbus-card-for-sparcstation
> -designed-in-2020/>
>
> Short version: I now need to figure out how to write a driver in NetBSD :-)
>
> Cordially,
>
> --
> Romain Dolbeau
> _______________________________________________
> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue


------------------------------

Message: 3
Date: Sat, 12 Dec 2020 23:03:13 +0100
From: Romain Dolbeau <romain at dolbeau.org>
To: The Rescue List <rescue at sunhelp.org>
Cc: sunhelp <sunhelp at sunhelp.org>
Subject: Re: [rescue] A SBus card for SPARCstation designed in 2020...
Message-ID:
B B B  <CADuzgbrUWOPKDXN=NBG-sNRUxqQkyTYZR=9DkByx+4sNyhLRvg at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Le sam. 12 dC)c. 2020 CB  22:49, Richard <ejb at trick-1.net> a C)crit :
> Thatb s awesome! Will you release the design once done?

Yes, once I'm somewhat convinced it won't hurt the host Sun...
wouldn't want to damage one of the not-so-many that are still being
run :-) So far I've seen no indication, but then I'm not a HW guy so
it's hard to figure out...

Also I want to share as if I can get someone else interested, I could
use some help with the FPGA gateware - I got the basics covered but
doing something useful might require more skills than I have.

Cordially,

--
Romain Dolbeau


------------------------------

Message: 4
Date: Sun, 13 Dec 2020 15:15:14 +0100
From: Romain Dolbeau <romain at dolbeau.org>
To: The Rescue List <rescue at sunhelp.org>
Cc: sunhelp <sunhelp at sunhelp.org>
Subject: Re: [rescue] A SBus card for SPARCstation designed in 2020...
Message-ID:
B B B  <CADuzgbpf29OcFryNW+X3-x0na=UXi1CSVBN4Rj_SUFvDupgWPw at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Le sam. 12 dC)c. 2020 CB  22:49, Richard <ejb at trick-1.net> a C)crit :
> That's awesome! Will you release the design once done?

New answer:

<https://github.com/rdolbeau/SBusFPGA>

There's a very basic NetBSD driver as well, to access the registers
(LED, GHASH) from userland using ioctls.

Cordially,

--
Romain Dolbeau


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