[OpenBIOS] Booting SunOS from OpenBIOS
Mark Morgan Lloyd
markMLl.openbios at telemetry.co.uk
Wed Mar 27 22:54:46 CET 2013
Tarl Neustaedter wrote:
> On 2013-Mar-27 13:52 , Mark Morgan Lloyd wrote:
>> Lennart Sorensen wrote:
>>> My guess would be that the sun4/1xx and sun4/2xx were not openboot,
>>> while the sparcstation and sparcserver models probable all are.
>>> So probably sun4c and sun4m were the first with openboot then. Sure is
>>> hard to find good details on these old things.
>> I've got a running SPARCstation IPC (sun4c?) here, and at the command
>> level it appears to be a hybrid between OpenPROM and something older.
>> I'd need to go back through my notes but I think there were some odd
>> I think the sun4m (SPARCstation 10, 20 etc.) were all OpenPROM, and
>> the sun4d (SPARCserver and probably SPARCcenter/CS6400) definitely are.
> The original sources for Openboot started in 1985, and it looks like
> they got formalized into SCCS source bases in 1988. The sparcstation 1
> was first sold in 1989, so almost certainly had Openboot on it. Someone
> local believes that Openboot was the defining characteristic of the
> "sun4c" architecture, and that the previous architecture (sun4) did not
> have it.
Or is the defining feature the sbus+OpenPROM combination? I've got a
/very/ vague recollection about the hardware being ready before the
firmware, so the earliest machines were shipped with interim code- this
was obviously long before Flash devices. I could obviously be totally
wrong, but it would explain the odd mixture on the IPC.
> I arrived at Sun during the sun4m architecture, which definitely had it.
> Ah... I see an interview with Mitch Bradley (original author of
> Openboot) saying Openboot explicitly started with Sparcstation one:
Yes, IIRC I found his moniker embedded in the SPARCserver ROMs.
OT, apropos mesh networking mentioned in that interview. I use AWDS, and
find it an utter PITA on account of the very poor support most Linux
wireless drivers have for ad-hoc operation. Kudos to Mitch & co. if
they've got an implementation working well on the OLPC machines.
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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