11 May
2007
11 May
'07
7:42 p.m.
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?
On 5/11/07 6:21 PM, "Chuck Guzis" <cclist at sydex.com> wrote:
On 11 May 2007 at 17:34, 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
I have a few IBM-labeled YE-Data YE-580
(320k/360k) half-height floppy
drives. I can?t seem to locate a manual for these on-line so I wondered if
they use the standard 150 ohm terminator or something else (the Teac uses
330 ohm for example).
I don't know if these are the same as those described in the IBM O&A
as the "Slimline Diskette Drive", but if they are, the terminators
shown are 150 ohm. If U1 on the drive PCB is a 74LS123, these are
them.
I have a few YD-380 720K drives, but the terminators are on 7-
position DIP switches and appear to be abou 3.3K.
Cheers,
Chcuk