25 Feb
2003
25 Feb
'03
3:41 p.m.
I just wish I
could find the SCSI controller that a German company made
for the DEC Rainbow. it'd be nice to pull the 20 meg HD out and drop a
500 meg SCSI in it's place :)
Wow! Is this documented? That *does* sound cool. Though I'm not sure just
how long it'd take to defragment... :-)
How did it work with the OS's, which were limited to disk sizes nothing
like 500 Meg?
- Mark 
25 Feb
25 Feb
5:09 p.m.
I'm pretty sure that msdos 3.11 supported multiple partitions :) also if I
had a SCSI controller in the beastie I'd probably go on the quest for
rainbow Venix :)
At 09:37 PM 2/25/03 -0800, you wrote:
That's a valid question, how big of an drive will the OS's on a Rainbow
support? I'm guessing you might be limited to 30MB, even if you've a bigger
drive in the system. IIRC, CP/M and old versions of DOS only support up to
30MB.
Zane
I just wish I could find the SCSI controller that a
German company made
for the DEC Rainbow. it'd be nice to pull the 20 meg HD out and drop a
500 meg SCSI in it's place :)
Wow! Is this documented? That *does* sound cool. Though I'm not sure just
how long it'd take to defragment... :-)
How did it work with the OS's, which were limited to disk sizes nothing
like 500 Meg?
- Mark 
26 Feb
26 Feb
12:43 a.m.
--- Geoff Reed <geoffr(a)zipcon.net> wrote:
I'm pretty sure that msdos 3.11 supported multiple
partitions :)
It does. I have a PS/2 Model 30 (ISA) with a 50MB RLL drive replacing
the original IBM IDE-ish drive. Two partitions under MS-DOS 3.11, one
30MB, one 20MB.
The problem is that there is a small number of partitions possible
(I don't recall if FDISK works the same way under 3.x as it did later),
certainly no more than 4 primary partitions. DOS 4.x came out (as bad
as it was) before 200MB drives were common. By the time "everybody"
was buying "larger" drives, DOS 5.0 was out, solving several problems
with historical baggage.
also if I had a SCSI controller in the beastie I'd
probably go on the
quest for rainbow Venix :)
Hmm... I would expect you'd need a Venix driver for it.
If you _really_ wanted a challenge, you could port Minix to the Rainbow.
Sources are available. Writing a Minix driver for the FDC might be
interesting (not sure how much suitable documentation exists).
-ethan
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