25 Aug
2022
25 Aug
'22
10:41 p.m.
On Thu, 25 Aug 2022, Ali via cctalk wrote:
Out of curiosity what is the model number of the
Micropolis drives? I
would like to find a picture of them on the net if possible and see this
precision-ground lead screw mechanism. Thanks.
I'm not Chuck, and I don't have a picture handy.
The pictures on pages 26 and 72 of
http://www.bitsavers.org/pdf/micropolis/102001A_Micropolis_1015_1016_Mainte…
aren't clear, but the ones on pages 90, 94, and 96 are marginally OK
But, you should be aware that the first two primary models were a 48tpi
Single sided, with only 35 tracks (NOT 40) (competing directly opposite
the SA400)
And, a 100tpi (NOT 96tpi) single-sided with 77 tracks (NOT 80).
Truly excellent drives, BUT, very slow. Pc-DOS 2.10 MIGHT be slow enough
for it (PC-DOS 2.10 had slowed down track to track stepping to work with
the Qumetrak 142 (which was NOT an excellent drive)).
for almost everything, you would want either double sided 48tpi with 40
tracks ("360K"),
or double sided 96tpi "high density" (for 1.2M).
or double sided 96tpi 80 track (for most "quad density" systems),
They made such, but I never had any other than the 35 and 77 track single
sided ones.
--
Grumpy Ol' Fred cisin(a)xenosoft.com