From uwm.edu!cs.utexas.edu!uunet!olivea!flash!blackson Mon Nov 22 07:21:40 CST 1993
Article: 10841 of comp.sys.palmtops
Path: uwm.edu!cs.utexas.edu!uunet!olivea!flash!blackson
From: blackson@flash.ATC.Olivetti.Com (Jim Blackson/Pegasus)
Newsgroups: comp.sys.palmtops
Subject: Quaderno printer/FDD connector pin-out
Date: 22 Nov 1993 06:31:29 GMT
Organization: Olivetti ATC; Cupertino CA, USA
Lines: 135
Message-ID: <2cpmc1$39j@olivea.ATC.Olivetti.Com>
NNTP-Posting-Host: flash.atc.olivetti.com
Keywords: Quaderno, Quaderno/33, printer port

For your information here is the pin-out for the combination
printer/FDD port of the Quaderno and Quaderno/33.  Enjoy.

Jim Blackson	Pegasus, Inc.
blackson@flash.atc.olivetti.com

Quaderno and Quaderno/33 parallel/FDD port pin assignment
 
 
			Legal Formalities
			=================
 
/*-------------------------- Disclaimer --------------------------------*\ 
 *									*
 *   While we have made a reasonable effort to ensure the following	*
 *   information is correct, Olivetti, Inc., its subsidiaries, and  	*
 *   its suppliers give no warranties with respect to the information 	*
 *   below, and all implied warranties including any warranty of 	*
 *   merchantability and fitness for purpose are hereby excluded.  	*
 *   IN NO EVENT WILL OLIVETTI, ITS SUBSIDIARIES, OR ITS SUPPLIERS 	*
 *   BE LIABLE FOR INDIRECT CONSEQUENTIAL, INCIDENTIAL OR SPECIAL 	*
 *   DAMAGES EVEN IF OLIVETTI HAS BEEN ADVISED OF THE POSSIBILITY 	*
 *   OF SUCH DAMAGES.							*
 *									*
\*-------------------------- Disclaimer --------------------------------*/ 
 
In other words, if you damage your Quaderno or Quaderno/33, that's your 
tough luck!  You've been warned.
 
 
			Pin Assignment
			==============
 
Both the Quaderno and Quaderno/33 use the JAE Tx20A-36R-D25F-A1LP
36-pin "mini" female connector as a combined printer/FDD port.
(The male half-pitch connector is part number Tx20A-36PH1-D2P1-D1.)
 
When looking into the connector, the pins are numbered as follows.
Odd pins on top, even pins on the bottom, ordered right-to-left.
 
	-------------------------
	\  35    .....   3  1  /
	 \ 36    .....   4  2 /
	  --------------------
 
The pin assignments of Quaderno and Quaderno/33 are almost same.  The 
different pins are 20, 34, and 35.  These pins are GND on the Quaderno.  
They are used for FDD power on the Quaderno/33.
 
Half of the pins, 1 - 18, are used for the printer.  The rest, 19-36,
are used for the FDD.  If you want to make your own printer cable,
the column on the right shows the pin numbers for a 25-pin D-SUB 
female connector (Note: pins 20 and 23 are no connection).
 
Half-pitch JAE connector			D-SUB Printer connector
------------------------			-----------------------
 1        STB					 1
 2        P_D0 (Printer Data)			 2
 3        P_D1					 3
 4        P_D2					 4
 5        P_D3					 5
 6        P_D4					 6
 7        P_D5					 7
 8        P_D6					 8
 9        P_D7					 9
10        SP_ACK				10
11        SP_BUSY				11
12        PE					12
13        SLCT					13
14        AFD					14
15        ERR					15
16        INIT					16
17        SLIN					17
18        GND					18
19        GND					19
						20 (no connection!)
20        VFDD (FDD power: Quaderno/33 only)	21
21        FDIDX
22        FDTK0
23        FDWP
24        FDRDD
25        FDCHG
26        FDDS1
27        FDMO1
28        FDWD
29        FDWE
30          reserved  (make no connection)
31        FDHS
32        FDDIRC
33        FDSTEP
34        VFDD (FDD power: Quaderno/33 only)	22
						23 (no connection!)
35        FDDINS (FDD power: Quaderno/33)	24
36        GND					25
 
 
			Quaderno/33 FDD power
			=====================
 
The specification for three pins were changed, to supply power to
the Quaderno/33 external floppy Disk Drive (FDD).
 
Pin 35, FDDINS-, is used to detect the type of FDD attached, and thus
controls whether the Quaderno/33's FDD power circuit is enabled.
 
If FDDINS- is low (connected to ground), the original Quaderno external
FDD is connected, so the VFDD power circuit will _not_ be enabled.
This detection circuit is necessary because the original Quaderno FDD
connects pins 20 and 34 (and 35) to ground, shorting the VFDD lines!
 
However, the Quaderno/33 external FDD sets FDDINS- to no connect.
This appears as HI, enabling the VFDD power circuit.  When the software
turns on the FDD power, power will flow through VFDD to the FDD.
 
VFDD is tied to the output from the AC adapter or the battery pack.
When using the AC adapter, VFDD typically is 12V DC, supporting a 
current of about 0.7 Amperes, with a peak current of 1.0 Ampere.
When running from a fully-charged battery pack, VFDD is typically
7.2V DC, supporting a current of 0.7 Amperes, with a peak current
also of 1.0 Amperes.
 
** WARNING ***** WARNING ***** Quaderno/33 ***** WARNING ***** WARNING **
*									*
* If you draw too much current, or short pins 20 and 34 to ground 	*
* without grounding pin 35 (effectively shorting VFDD to ground), 	*
* you might _damage_ your Quaderno/33, and also...			*
*									*
*	1) blow a fuse on the motherboard;				*
*	2) cause a reset (the Quaderno was starved of power);		*
*	3) cause a shut down (the Quaderno was starved of power);	*
*									*
*********** WARNING ***** WARNING ***** WARNING ***** WARNING ***********
 

That's all folks!


