Date   : Wed, 15 Mar 2006 17:09:39 +0000
From   : Fragula <fragula@...>
Subject: Re: 1MHZ SCSI/ATA board

Jules Richardson wrote:

> I suspect that was me, muttering about wanting a copy of the ROMs (if
> they even exist as such)!
Nope.. Me, fairly accurately, remembering:


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Jules Richardson wrote:
> David Hunt wrote:
>> In theory (I believe) if we could extract the BIOS ROM from the
>> 6502/Z80/32016/80186/80286/68000 2nd Processors
>
>
> I *almost* have all of those on disk here - just missing the Casper 68K
> ones I think (although I have the Torch 68K ones).


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...But impeccably forgetting:

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> I'm still looking for genuine '286 ones, if they ever actually existed -
> the '286 powered ABC machines were pressed into service by Acorn for
> Master 512 development, so they all ended up with Master 512 ROMs (which
> is what my board has). I'm not even sure if Acorn ever even got to the
> point of fitting the '286 copro with its own ROM, or if it was such a
> stillborn project that they immediately started life as Master 512 dev
> boxes...

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But if that's the case, the M512 ROMs can be considered, if not are, the
de-facto article to have. Oh.. unless anybody remembers "protected mode"
(or whatever 286 feature there was) and can think of a sensible use for
it, outside of a Minix port.

Hmm.. There was some good trick for a 286 with 1M (i.e. more than 640K)
of RAM.. Or was it "more than a meg"? (286 has 24 bit address bus?)

I'm sure it will come to me at some completely inopportune moment, on a
clifftop, in the middle of noplace, population : 0.

I'll have to scribble it on a leaf, using a blunt pebble, in the rain,
while being attacked by seagulls, or something. And then I'll probably
loose the leaf on the way home.

That's life. Or is it just me?

Cheers!

M.