mac@harris.cis.ksu.edu (Myron A. Calhoun) (09/06/90)
In addition to the usual pair of 5 1/4" floppy drives, I have two
Remex 4000 8" disk drives attached to my Zenith Z-100, and I'd sure
like to learn just what the various little jumper-selectable options
on the drive boards do.
All of the drives work, but with one little "hitch" that bugs me.
Reading a Shugart manual for similar drives (unfortunately, I don't
have Shugart drives), makes me suspect one of the jumpers will un-bug me.
The "hitch" is that when I boot, my system doesn't recognize the
presence of either 8" drive UNLESS the drive door is closed (whether
or not a diskette is inside). The Shugart 850 manual manual lists
an option to "select drive and enable stepper without loading heads",
which would (probably) permit my system to step to track 00 and
verify that the drive is actually present.
Does anyone know anything about the Remex jumpers (or other options)?
--Myron.
--
# Myron A. Calhoun, Ph.D. E.E.; Associate Professor (913) 539-4448 home
# INTERNET: mac@harris.cis.ksu.edu (129.130.10.2) 532-6350 work
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# AT&T Mail: attmail!ksuvax1!macdonm@pnet07.cts.com (Don Maslin) (09/13/90)
The following was previously forwarded by e-mail to Myron Calhoun:
REMEX 4000/4001 8" DS FLOPPY DISK DRIVE
Customer Cut/Add Trace Options
Trace Shipped from Factory
Designation Description Open Short
7A Termination for Multiplexed Inputs Plugged
DS1 Drive Select 1 Input Pin X
DS2,3,4 Drive Select 2,3,4 Input Pins X
1B,2B,3B,4B Side Select Option Using Drive Select X
RR Radial Ready X
RI Radial Index and Sector X
R (Shunt 5E) Option Shunt for Ready Output X
2S Two-Sided Status Output X
4000/4001 Sector Option Enable 4000 4001
I (Shunt 5E) Index Output X
S (Shunt 5E) Sector Output X
DC Disk Change Option X
HL (Shunt 5E) Stepper Power from Head Load X
DS Stepper Power from Drive Select X
WP Inhibit Write When Write Protected X
NP Allow Write When Write Protected X
D Alternate Input - In Use X
DL Door Lock Option X
A,B,X (5E) Radial Head Load X
C Alternate Input - Head Load X
Z (Shunt 5E) In Use from Drive Select X
Y In Use from Head Load X
S1 Side Select Option Using Drive Select X
S2 Standard Side Select Option X
S3 Side Select Optioon Using Drive Select X
TS,FS Data Separation Option Select FS TS
TS - True Separation
FS - False Separation
(The Data Separation goes out of
phase in the IBM Address Mark Fields)
-5V, -15V -5 Volt Supply Option X
U4,U6,U8,U Unselect Ready X
AA,BB,CC Disk Change Output BB to CC
Shunt 5E is a 16 pin programmable shunt at location 5E on the circuit
board.
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