https://web.archive.org/web/19961018071541/http://www.iomega.com/support/techs/adapter/cable1.html
Listed below are the cable pin-outs for various host cable connectors
used with Iomega products:
SIGNAL 50 PIN 50 PIN 37 PIN 25 PIN 50 PIN
NAME Cntrncs Ribbon D-Shell D-Shell SCSI2/HD
DB0 26 2 37 8 6
DBI 27 4 36 21 7
DB2 28 6 35 22 8
DB3 29 8 34 10 9
DB4 30 10 33 23 30
DB5 31 12 32 11 31
DB6 32 14 31 12 32
DB7 33 16 30 13 33
DBP(par) 34 18 29 20 34
ATN 41 32 n/c 17 41
BSY 43 36 8 6 43
ACK 44 38 7 5 44
RST/RES 45 40 6 4 45
MSG/MES 46 42 5 2 46
SEL 47 44 4 19 47
C/D 48 46 3 15 48
REQ 49 48 2 1 49
I/O 50 50 1 3 50
GND 1-11 * 11-28 7,9,14 1-12
GND 15-25, 20,22 10** 16,18, 14-25
GND 35,36, 30,34 24 35-37,
GND 40,42, 39,40,42
RESERVED 12,14, 23,27
RESERVED 37,39
OPEN 13 25 9,10** 13
TRM PWR 38 26 n/c 25 38
NOTE:
Cables with the same connectors on both ends are wired pin for pin.
Cables with different connectors on its ends are wired according to the
above chart.
* All ODD pins except 23, 25, 27.
** Pin 10 is open on PC2 Adapters, but is tied to ground on the
PCI, PC3, and PC4 adapters.
--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)