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From: Schroeder.Henr@Xerox.ARPA
Newsgroups: net.ham-radio
Subject: Re: Shugart SA-901 documentation
Message-ID: <3392@brl-tgr.ARPA>
Date: Tue, 19-Nov-85 13:13:57 EST
Article-I.D.: brl-tgr.3392
Posted: Tue Nov 19 13:13:57 1985
Date-Received: Thu, 21-Nov-85 21:39:09 EST
Sender: news@brl-tgr.ARPA
Lines: 74

Alex,

The following information may help you out.  Cannot verify its content since 
I haven't used it.

The SA-900-1 drives need the following options on the control board (On the 
side of the drive):

IN: S, T, Y, M, U1, DS, P, L, A, B, K, C, F, G, H, J
OUT: D, E, N, X

The connector on the 900 drive is 22 pins on each side on .156 centers.
Looking at the rear of the drive, with the spindle drive motor at the top,
the J1 connector is numbered L1 at the top left and L22 at the bottom
left.  The top right is R1  through R22.  The Vector R644 connector fits this
drive very well.  The interconnects should be twisted pair wire.  The signal
lines all are driven with an associated ground.  For example, the R5 line (Index)
should have it's paired wire connected to L5.  Do this with all wires.

If you only have -15v in your system, (no -5v) cut the "L" jumper in the
lower left of the disk board.  The board contains its own series regulator to
go from -15v to -5v.  Connect -15v to L20.

SA-900-1 pin to (SA801 pin) -- J5 is the power Connector on the SA-801
R1 Logic Gnd (J5-6)
L1 Logic Gnd (J5-6)
R2 +24v (J5-1)
L2 +24v (J5-1)
R3 +24 return (J5-2)
L3 +24 return (J5-2)
R4 (no connection (n/c))
L4 File Unsafe Reset (n/c)
R5 Gnd (15)
L5 Index (20)
R6 Gnd (17)
L6 Step (36)
R7 Gnd (19)
L7 Write Gate (40)
R8 Gnd (21)
L8 Ready (22)
R9 Gnd (23)
L9 File Unsafe (n/c)
R10 Gnd (25)
L10 Write Data (38)
R11 +5v (J5-5)
L11 +5v (J5-5)
R12 Gnd (27)
L12 TRK00 (42)
R13 Gnd (29)
L13 Device Select (DS1=26, DS2=28, DS3=30, DS4=32)
R14 Gnd (31)
L14 Sector (n/c)
R15 Gnd (33)
L15 Direction (34)
R16 Gnd (35)
L16 Raw Data (46)
R17 Gnd (37)
L17 Seperate Data (n/c)
R18 Gnd (39)
L18 Head Load (18)
R19 Gnd (41)
L19 Seperate Clock (n/c)
R20 -5v (J5-4)
L20 -5v (J5-4)
R21 Gnd (J5-3)
L21 Write Current Select (n/c)
R22 Logic Gnd (J5-6)
L22 Logic Gnd (J5-3,6)

Do not have any power information on the SA-901.  Will keep looking.

Good Luck,

Russ Schroeder  W2DYY