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- Path: jobe.shell.portal.com!jkesling
- From: jkesling@shell.portal.com (John Darrell Kesling)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: SCSI 50pin to DB25 ??
- Date: 5 Feb 1996 05:19:24 GMT
- Organization: Portal Communications Company -- 408/973-9111 (voice) 408/973-8091 (data)
- Message-ID: <4f440s$76@news1.shell>
- References: <502.6602T1344T724@mailbox.swipnet.se> <4er1lm$s49@tbd120.tbd.ford.com>
- NNTP-Posting-Host: jobe.shell.portal.com
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-
- Chris \"Big-Kahuna\" Rampson (crampson@ford.com) wrote:
- >stefan.thim@mailbox.swipnet.se (Stefan Thim) wrote:
- >>
- >>Hello.
- >>
- >>is it anyone out there who know how to connect the internal
- >>50-pin SCSI to external DB25 ?
- >>
-
- >All pins numbered from 26-50 are GROUND and can be (essentially) ignored.
- >Pins 1-25 are the same for DB25 and 50pin internal cable.
-
- That's not correct! The following are the pin assignments
- from the book.
-
- ------------------------------------------------------------
- 25-Pin SCSI Connection
-
- Pin Name
- 1 REQ
- 2 MSG
- 3 I/O
- 4 RST
- 5 ACK
- 6 BSY
- 7 Ground
- 8 Data 0
- 9 Ground
- 10 Data 3
- 11 Data 5
- 12 Data 6
- 13 Data 7
- 14 Ground
- 15 C/D
- 16 Ground
- 17 ATN
- 18 Ground
- 19 SEL
- 20 Parity
- 21 Data 1
- 22 Data 2
- 23 Data 4
- 24 Ground
- 25 Termination Power
-
- ------------------------------------------------------------
-
- 50-Pin SCSI Connection
-
- Pin Name
- 50 I/O
- 48 REQ
- 46 C/D
- 44 SEL
- 42 MSG
- 40 RST
- 38 ACK
- 36 BSY
- 34 N.C.
- 32 ATN
- 30 Ground
- 28 Ground
- 26 Termination Power
- 24 Ground
- 22 Ground
- 20 Ground
- 18 Parity
- 16 Data 7
- 14 Data 6
- 12 Data 5
- 10 Data 4
- 08 Data 3
- 06 Data 2
- 04 Data 1
- 02 Data 0
-
- All odd pins, except pin 25, are ground. Pin 25 is not used
- ------------------------------------------------------------
-
- Hope thid helps,
- John
- --
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- John Kesling - jkesling@shell.portal.com or jkesling@norden1.com
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