[vcf-midatlantic] DEC Rainbow 100+

Dean Notarnicola dnotarnicola at gmail.com
Tue Mar 3 16:53:07 EST 2020


Back in my college days, I always set my VT for smooth scroll.

On Tue, Mar 3, 2020 at 7:23 AM Adam Michlin via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> Interesting. This a video we took when first booting the machine:
>
> https://www.instagram.com/p/B86IsEwHV9v/
>
> No menu.
>
> The Columbia link says it could potentially run 3 OSes:  MS-DOS, CP/M-86
> (16-bit), and CP/M-80 (8-bit). That would make sense with C:, D: and E:.
>
> The plot thickens... I'll go through the manuals carefully at the
> workshop this weekend.
>
> I haven't seen smooth scroll in decades, so I can't really say if it is
> different that what I know. It is beautiful, but I can imagine that the
> speed would get annoying with repeated uses.
>
>
> On 3/2/2020 9:37 PM, David Gesswein via vcf-midatlantic wrote:
> > Curious so looked a little. No first hand experience.
> >
> > Should have a boot menu
> >
> https://thumbs.worthpoint.com/zoom/images4/1/0516/12/vintage-dec-rainbow-pc-100-b2_1_7450a211bd5a51daaf335136a45b64d8.jpg
> >
> > http://www.columbia.edu/cu/computinghistory/rainbow.html
> >
> > I always found the smooth scroll looked nice but was significantly
> slower than
> > jump so I always turned it off. Is it any different on this machine?
> >
> >
> > On Mon, Mar 02, 2020 at 08:23:32PM -0500, Adam Michlin via
> vcf-midatlantic wrote:
> >> Hi Everyone,
> >>
> >> So we have an absolutely gorgeous, looking almost brand new, completely
> >> dec'ed out (see what I did there?), DEC Rainbow 100+ for hands on use
> in the
> >> museum now in the new business office display.
> >>
> >> It currently boots up to MS-DOS and runs the DEC WPS word processor. It
> also
> >> seems to have 123 installed, although there may have a copy protection
> >> issue.
> >>
> >> But what intrigues me the most is that the MS-DOS boot disk is E:... C:
> and
> >> D: appear to exist, but aren't MS-DOS formated.
> >>
> >> So, I'm guessing these might be CP/M partitions for the Z80 processor
> also
> >> in the DEC Rainbow. But, the big question, how do we tell it to boot
> CP/M?
> >>
> >> And, I understand it can also function as a standand alone VT-100
> terminal.
> >> How do we get it to go into that mode? This opens an entirely different
> >> world of uses once it is rotated out as the "business" computer on the
> >> business desk.
> >>
> >> Oh... most importantly... I had forgotten how absolutely gorgeous smooth
> >> scroll is.
> >>
> >> Thanks much,
> >>
> >>            -Adam
>
>
>


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