Floppy Diskette's 
-----------------------------------------------------------------------------
Storage Formatted     | 160K  180K  320K  360K  720K  720K  400K  1M2  1M4 
Disk Size             | 5.25  5.25  5.25  5.25  5.25  3.50  5.25  5.25 3.50
Disk Type             |                                            2    4
Media Discriptor      |  FE    FC    FF    FD          F9    FA    F9   F0
Density               |   S     D     S     D           D     S     H    H
Sides                 |   1     1     2     2     2     2     1     2    2
Access Time Trk-Trk ms|                                       6
Hd Load+Settle Time ms|                                      30
Rotational Latency  ms|                                     100    83   100  
Random Access       ms|                                     290  
Ave Seek            ms|                                     164    92    94  
Motor Start         ms|                                     500  
Transfer Rate       Kb|                                     250   500   500  
Disk Rotation      RPM|                                     300
Root Dir           fil|                                      96
Number of FATs        |         2           2           2     2     2    2
FAT Type         (bit)|        12          12          12    12    12   12
Tracks                |  40    40    40    40          80    80    80   80
Cylinders             |                                            80   80
TPI                   |                                            96
Cluster Size          | 512   512  1024  1024        1024   512   512  512
Number Clusters       |       351         354         713   768  2371 2847
Sectors/Cluster       |         1           2           2     1     1    1
Sectors/Track         |   8     9     8     9           9    10    15   18
Bytes/Sector          |       512         512         512   512   512  512
Bytes/Track           |                                    5120
Disk Size             | 5.25  5.25  5.25  5.25  5.25  3.50  5.25  5.25 3.50
Storage Formatted     | 160K  180K  320K  360K  720K  720K  400K  1M2  1M4 
-----------------------------------------------------------------------------

General Disk Information
------------------------

               --Sector location ranges(DOS 3.xx)--
Disk  Disk     FAT-1 FAT-2   Root    Data Area
Size  Type     ------------------------------------
-------------------------------------------------------------------------
160K  5 1/4"SS  0   1       2      3-6     7-319
180K  5 1/4"SD  0  1-2     3-4     5-8     9-359
320K  5 1/4"DS  0   1       2      3-9    10-639
360K  5 1/4"DD  0  1-2     3-4     5-11   12-719
720K  3 1/2"DD  0  1-3     4-6     7-13   14-1439
400K  5 1/4"DS  
1M2   5 1/4"DQ  0  1-7     8-14   15-28   29-2399
1M4   3 1/2"DQ  0  1-9    10-18   19-32   33-2879
-------------------------------------------------------------------------

LOGICAL CHARACTERISTICS
=======================

                   360k   400k   720k    1m2    1m4     
 --------------------------------------------------
  FAT start sctr:          20              1      1
   Sectors Occup            6             14     18
Rt Dir strt sctr:          26             15     19
     Sctrs Occup            6             14     14
  Data strt sctr:          32             29     33
     Sctrs Occup          769           2372   2848
 --------------------------------------------------

DIGITAL FLOPPY EQUIVELENTS
-------------------------- 
RX23  1.4M 3 1/2"
RX33  1.2M 5 1/4"
RX50  409K 5 1/4"

COMPAQ FLOPPY CABLE
-------------------
Diskette one has lines 10-16 reversed (7 leads)
Diskette two & three are straight through

Diskette Controller Connectors:
-------------------------------
PC, XT Floppy Disk 34-pin keyed edge connector (key b/w 6 and 8), even
numbers are on component side:

-----------IBM DESCRIPTION----------------------STANDARD DESCRIPTION-----
  Pin    Description      Direction            Pin    Description
-------------------------------------------------------------------------
   1     Ground                                 1
   2     UNUSED                                 2     Spare
   3     Ground                                 3
   4     UNUSED                                 4     In use
   5     Ground                                 5
   6     UNUSED                                 6     Drive select 3
   7     Ground                                 7
   8     Index            From drive            8     Index
   9     Ground                                 9
  10     Motor Enable A   From controller      10     Drive select 0
  11     Ground                                11
  12     Drive Select B   From controller      12     Drive select 1
  13     Ground                                13
  14     Drive Select A   From controller      14     Drive select 2
  15     Ground                                15
  16     Motor Enable B   From controller      16     Motor on
  17     Ground                                17
  18     Direction (stepper motor) F. C.       18     Direction Select
  19     Ground                                19
  20     Step pulse       From controller      20     Step
  21     Ground                                21
  22     Write data       From controller      22     Write data
  23     Ground                                23
  24     Write enable     From controller      24     Write gate
  25     Ground                                25
  26     Track 0          From drive           26     Track 0
  27     Ground                                27
  28     Write protect    From drive           28     Write protect
  29     Ground                                29
  30     Read data        From drive           30     Read data
  31     Ground                                31
  32     Select head 1    From controller      32     Side one select
  33     Ground                                33
  34     UNUSED                                34     Ready

Floppy (4-pin molex connector):
-------------------------------
  Pin          Function
   1           +12V
   2           Ground
   3           Ground
   4           +5V
