12 May
2007
12 May
'07
4:48 a.m.
Chuck:
The manufacturers label on the drive says "YD-580 320k/360k". I just
tried the drive on my Hawthorne SBC and terminated it with 150 ohms and it
works fine.
The only thing I noticed is that the drive light stays on after being
accessed. There are two jumper positions called HM and HS. HS is open and HM
is connected. Any idea as to how make to light follow the select line?
Rich
On 5/12/07 1:01 AM, "Chuck Guzis" <cclist at sydex.com> wrote:
On 11 May 2007 at 22:42, Richard A. Cini wrote:
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.altair32.com
http://highgate.comm.sfu.ca/~rcini/classiccmp
Interestingly, the IC1 on this drive is a QFP
chip from Hitachi (HA16642MP).
The PC board revision is "Rev. C" so maybe that's part of it. I think this
is probably an AT-era drive but I thought the base AT came with 1.2mb
drives? Maybe an option?
Nope--that'd be the 380. Here's the info and a few specs for the
580:
http://ja1wby.art.coocan.jp/hamg/7-fm7-fdd/2-yd-580.html
Note that the spec calls for 150 ohm pullups on both the host and
drive side.
Cheers,
Chuck