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286 Parallel Port cdrom no labelling, drivers unknown

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  • Chuck(G)
    replied
    You'd see a lot of older parts with cables like that--they're still SCSI, but employ the old "Apple SCSI" DB25 connector, though the convention wasn't limited to Apple by any means. I've got several SCSI cards with DB25s on them. One or two even have stickers above the connector saying "SCSI". The terrible thing is that the DB25 SCSI on a PC sometimes isn't exactly the same as that on an Apple!

    I suspect that the Commodore Amiga was also complicit in this reprehensible practice of using DB25s for non-datacomm applications, though IBM also promulgated the mess by using them for parallel interface as well.

    At any rate, this is a SCSI cable:



    Just more voodoo to add to the SCSI story. The problem was that the ANSI SCSI committee never formally specified the exact connector to be used.

    To make matters even more confusing, this is a printer cable:

    Last edited by Chuck(G); February 20, 2014, 05:34 PM.

    Leave a comment:


  • SpookyZalost
    replied
    that's the cable that came with it, but then I think the person just gave me a random cable to connect it.

    I think I'll get a 16bit MCA bus SCSI controller card with my next paycheck to see if that fixes the problem, I've seen several and they are not that expensive.

    Leave a comment:


  • NeXT
    replied
    The model 50 does not have onboard SCSI. You're plugging into the parallel port which is NOT SCSI compatible. That other port you see next to it is a 25 pin serial port.

    Leave a comment:


  • SpookyZalost
    replied
    before I went and messed with the drivers again I went and checked the cable and the ports on the back, I'm fairly certain that it's a scsi connector on one end and a parallel port on the other, with the parallel port connecting to the back of my PS/2 Model 50
    Tried to take steady pic's to show what I mean
    https://dl.dropboxusercontent.com/u/...220_171407.jpg
    https://dl.dropboxusercontent.com/u/...220_171513.jpg
    https://dl.dropboxusercontent.com/u/...220_171616.jpg

    considering what I know now... would it be easier just to get a scsi add in card and use a scsi to scsi cable for the drive?

    I was thinking about getting one eventually, mostly because I have a 9 drive scsi hdd array which I was thinking about using for extending the storage on the computer.
    Last edited by SpookyZalost; February 20, 2014, 04:28 PM.

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  • luvit
    replied
    Yeah, I can stand corrected. I've only used a few parallel port drives.
    The two drives I've installed with Centronix connectors did only had one port.
    I did install another with two DB25 pin connectors.. one for a printer piggy-back.
    But alas, the numeric SCSI ID selector is likely the best answer that's it's SCSI.

    Leave a comment:


  • Chuck(G)
    replied
    I've got a parallel port device here with one DB25F and one "Centronics/Amphenol" 34-position female connector, the idea being that you simply grabbed another printer-to-PC cable and inserted the thing between your printer and the PC.

    But what's on the OP's CD-ROM box are 50-position "Centronics/Amphenol/Blue Ribbon" connectors, used extensively in the SCSI-1 days--and by many office multi-line telephone systems as well. I seem to recall that the Dataproducts printer interface was 50-position as well, but not the Amphenol-type connectors--and the computer end was usually a DC-37M.

    Leave a comment:


  • krebizfan
    replied
    Originally posted by luvit View Post
    .
    I agree that's SCSI. Here's why:
    Parallel port external CD-Rom Drives only had one centronix connector. Your device has two centronix connectors.
    The 2nd port would be for SCSI daisy-chaining multiple external devices or the 2nd connector would allow for a required SCSI terminator.
    Are you sure that Parallel Port CD-ROM drives had only one Centronics port? I haven't seen any device for PC parallel port using Centronics connector except for printers. All the parallel port enclosures I have seen have had 2 DB-25 connectors (one to the computer and the other for passthrough to printer) which is a problem since Mac targeted SCSI enclosures used the same DB-25 connector but get unhappy if attached to a parallel port.

    Note for the OP: I can't say for sure with that enclosure but many of the SCSI enclosures I have the SCSI ID switch on the back doesn't do anything. You may have to open up the enclosure and extract drive to manually set the correct SCSI ID.

    Leave a comment:


  • luvit
    replied
    .
    I agree that's SCSI. Here's why:
    Parallel port external CD-Rom Drives only had one centronix connector. Your device has two centronix connectors.
    The 2nd port would be for SCSI daisy-chaining multiple external devices or the 2nd connector would allow for a required SCSI terminator.

    Leave a comment:


  • Chuck(G)
    replied
    ...and that's a SCSI ID switch near the power connector.

    Leave a comment:


  • SpidersWeb
    replied
    Yes those are definitely SCSI connectors.

    Leave a comment:


  • SpookyZalost
    replied
    Originally posted by NeXT View Post
    That's very much a SCSI CD-ROM drive.
    ok, in that case, after work tomorrow I will see about initializing drivers for the scsi connector on the back of the model 50 and seeing if it detects the drive then.

    Leave a comment:


  • NeXT
    replied
    That's very much a SCSI CD-ROM drive.

    Leave a comment:


  • SpookyZalost
    replied
    Originally posted by Chuck(G) View Post
    Can you post a clear photo of the back of the unit, please?
    https://dl.dropboxusercontent.com/u/...219_234452.jpg

    Originally posted by SpidersWeb View Post
    Well the PS/2 has no CD-ROM support whatsoever. If the drive flashes on startup it's probably just the computer initialising the printer port.
    I was hoping you had a driver installed which was detecting it. The generic ATAPI drivers wont work, but a generic one designed for parallel port drives might - what drivers have you tried? What do they say?
    mostly just the generic Dos CD rom drivers, it's sorta like they run, but don't detect anything, and if it's just initializing the parallel port, that makes sense as to why the light and the drive powers up on boot.

    Leave a comment:


  • SpidersWeb
    replied
    Originally posted by SpookyZalost View Post
    well the drive lights up on bootup, it recieves signal, and I'm guessing there is some hardware communication, and the driver I used was the free dos one, as well as a few other generic ones, which seem to get part way but won't detect the drive completely, my thoughts are that it's because it's not internal, but that's just a guess.
    Well the PS/2 has no CD-ROM support whatsoever. If the drive flashes on startup it's probably just the computer initialising the printer port.
    I was hoping you had a driver installed which was detecting it. The generic ATAPI drivers wont work, but a generic one designed for parallel port drives might - what drivers have you tried? What do they say?

    Leave a comment:


  • Chuck(G)
    replied
    Can you post a clear photo of the back of the unit, please?

    Leave a comment:

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