zen@gpu.utcs.toronto.edu (Nick Zentena) (02/11/87)
Does anybody have a copy of the pinout for the Mac+ SCSI port?
Or conversly know where it is documented?
Thanks
Nick
--
Nick Zentena
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I don't need no stinking signature
Everything I say has no possible meaning if you think it is controversial.mrh@Shasta.UUCP (02/12/87)
In article <1987Feb10.202610.11345@gpu.utcs.toronto.edu>, zen@gpu.utcs.toronto.edu (Nick Zentena) writes: > Does anybody have a copy of the pinout for the Mac+ SCSI port? > Or conversly know where it is documented? > Nick Zentena There is a picture of the DB25 connector and the pinout assignments for the MAC+ SCSI on page 252 of Inside Macintosh Volume IV. Question: Does anybody but me think it is incredibly stupid that Apple put a DB25 (RS232 standard) connector on the Mac+? I've seen comments by people who hooked up RS232 devices and didn't know why they didn't work. Sure seems like a dangerous thing to do!!! David Gelphman BITNET address: DAVEG@SLACVM Bin #88 SLAC ARPANET address: DAVEG@SLACVM.BITNET Stanford, Calif. 94305 UUCP address: ...psuvax1!daveg%slacvm.bitnet 415-854-3300 x2538 usual disclaimer #432 applies: my employer apologizes for the fact that I have access to this net.
grr@cbmvax.UUCP (02/13/87)
In article <1987Feb10.202610.11345@gpu.utcs.toronto.edu> zen@gpu.utcs.toronto.edu (Nick Zentena) writes: > > Does anybody have a copy of the pinout for the Mac+ SCSI port? >Or conversly know where it is documented? Pin Signal === ====== 1 REQ 2 MSG 3 IO 4 RST 5 ACK 6 BSY 7 GND 8 D0 9 GND 10 D3 11 D5 12 D6 13 D7 14 GND 15 CD 16 GND 17 ATN 18 GND 19 SEL 20 DP 21 D1 22 D2 23 D4 24 GND 25 GND Note that the MAC+ SCSI interface is said to be a (proper?) subset of the complete SCSI specification, so it is possible that some SCSI devices may not be usable with the hardware/software provided... -- George Robbins - now working for, uucp: {ihnp4|seismo|rutgers}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@seismo.css.GOV Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)
ron@brl-sem.UUCP (02/13/87)
They probably think it's logical since Apple has never used DB25's on the serial ports. IBM puts their CENTRONICS interface on a DB25 as well. Yes it sucks, but it doesn't bother me as much as the proliferation of MODTAP connecctors. By and large most SCSI I've used is either hooked up with either plain BERG connectors or DB-37 plugs. -Ron