11 Feb
1999
11 Feb
'99
2:07 p.m.
True enough I'm sure. MITS also produced a "mini"-floppy controller that
was also a two board TTL set. The first board (computer interface) was the
same board as in the 8" set (except for different RC values), the second
board was completely different. I have the MITS docs for the "mini"-floppy
system and it is documented as a hard sectored using 16 sectors per track.
I also have an Altair Mini-Floppy BASIC disk and it is also hard sectored
with 16 sector holes.
- Doug
-----Original Message-----
No. The original disk for the altair before they became
Pertec Computers
was an 8" system using two boards of TTL. I know I built
three of them in
that era and debugged a few more. All if the later Pertec
machines with
minifloppies had a board that used a 1771 plus a raft of ttl.
I might add the Pertec controller was sold before the Pertec
aquired MITS.
Allison
11 Feb
11 Feb
2:29 p.m.
On Thu, 11 Feb 1999, Doug Duchene wrote:
True enough I'm sure. MITS also produced a
"mini"-floppy controller that
was also a two board TTL set. The first board (computer interface) was the
same board as in the 8" set (except for different RC values), the second
board was completely different. I have the MITS docs for the "mini"-floppy
system and it is documented as a hard sectored using 16 sectors per track.
I also have an Altair Mini-Floppy BASIC disk and it is also hard sectored
with 16 sector holes.
But wasn't the mini-floppy actually produced by iCom, and then labeled as
a MITS product after Pertec acquired both MITS and iCom? What's the
copyright date on your docs?
Do these people buying Altair stuff on ebay for big bucks really think
that the Pertec-era stuff is interesting?
-- Doug
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