ali99@bsu-cs.bsu.edu (Mohammad Ali) (07/19/90)
Hi! Need some help.... I am trying to connect a third floppy drive to a Mac SE/30. I am trying to use the connector from the floppy which is already connected to it externally ...but due to some reason it would not recognise it at all....What is going wrong and to start with can it handle more than two floppies....?? Please help!! Thanks in advance Ali!
stevec@Apple.COM (Steve Christensen) (07/19/90)
In article <11501@bsu-cs.bsu.edu> ali99@bsu-cs.bsu.edu (Mohammad Ali) writes: > I am trying to connect a third floppy drive to a Mac SE/30. I am trying to > use the connector from the floppy which is already connected to it > externally ...but due to some reason it would not recognise it at all.... > What is going wrong and to start with can it handle more than two floppies?? > Please help!! I presume what you mean is that you are trying to daisy-chain a second external drive onto the external drive connected to the SE/30. Well, you can't do that even though there's a connector on the drive. It's set up to handle only one internal and one external drive... steve -- ____________________________________________________________________ Steve Christensen Internet: stevec@goofy.apple.com Apple Computer, Inc. AppleLink: CHRISTENSE1 20525 Mariani Ave, MS 81-CS CompuServe: 76174,1712 Cupertino, CA 95014 "You just contradicted me." "No I didn't." ____________________________________________________________________
calvinc@sandstorm.Berkeley.EDU (Calvin Cheng) (07/19/90)
In article <11501@bsu-cs.bsu.edu> ali99@bsu-cs.bsu.edu (Mohammad Ali) writes: >Hi! Need some help.... > > I am trying to connect a third floppy drive to a Mac SE/30. I am trying to > use the connector from the floppy which is already connected to it externally ...but due to some reason it would not recognise it at all....What is going wrong and to start with can it handle more than two floppies....?? Please help!! > > All Macs and Apple IIs are designed around the IWM (Integrated or Incredible Woz Machine) and its direct descendent, the SIWM. Both of these chips are only designed to work with 2 floppy drives connected. If you examine the pin-out to your floppy port (nearly identical on the Apple IIs and Mac, not too sure about the FDHD), to you'll find that one of the lines is a drive select line. This is what differentiates between the internal and external or in the case of the IIGS, 2 external floppy drives. There are 3rd party solutions such as the Rapport that allows floppy drives to be hooked up via the SCSI port but I think it's a really brain-damaged way of doing things.
chma@iceman.jcu.oz (Michael Antolovich) (07/19/90)
In article <1990Jul19.043349.4506@agate.berkeley.edu>, calvinc@sandstorm.Berkeley.EDU (Calvin Cheng) writes: > In article <11501@bsu-cs.bsu.edu> ali99@bsu-cs.bsu.edu (Mohammad Ali) writes: > >Hi! Need some help.... > > > > I am trying to connect a third floppy drive to a Mac SE/30. I am trying to > > use the connector from the floppy which is already connected to it externally ...but due to some reason it would not recognise it at all....What is going wrong and to start with can it handle more than two floppies....?? Please help!! > > > > > All Macs and Apple IIs are designed around the IWM (Integrated or Incredible > Woz Machine) and its direct descendent, the SIWM. Both of these chips are > only designed to work with 2 floppy drives connected. If you examine the > pin-out to your floppy port (nearly identical on the Apple IIs and Mac, not > too sure about the FDHD), to you'll find that one of the lines is a drive > select line. This is what differentiates between the internal and external > or in the case of the IIGS, 2 external floppy drives. There are 3rd party > solutions such as the Rapport that allows floppy drives to be hooked up > via the SCSI port but I think it's a really brain-damaged way of doing things. This may seem silly, but can't a third drive be attached to a twin drive SE ? (Isn't CMD-SHFT 0 used for ejecting the third floppy ?) Do the Twin SE's have a different scheme to the rest of the Apple line ? Just wondering, Michael padding padding padding padding padding padding padding padding padding padding padding
stevec@Apple.COM (Steve Christensen) (07/20/90)
In article <846@iceman.jcu.oz> chma@iceman.jcu.oz (Michael Antolovich) writes: >In article <1990Jul19.043349.4506@agate.berkeley.edu>, calvinc@sandstorm.Berkeley.EDU (Calvin Cheng) writes: >> In article <11501@bsu-cs.bsu.edu> ali99@bsu-cs.bsu.edu (Mohammad Ali) writes: >> >[stuff about trying to connect a 3rd floppy to a Mac SE/30] >> [history of Apple disk controllers plus 3rd part solutions] > This may seem silly, but can't a third drive be attached to a twin >drive SE ? (Isn't CMD-SHFT 0 used for ejecting the third floppy ?) Do the >Twin SE's have a different scheme to the rest of the Apple line ? Yes, but that's an SE not an SE/30. The SE/30 is essentially a IIx in a different package so it's limited to 2 drives. The SE lets you have 3 drives because there is an extra drive selection toggle that's used in conjunction with the internal drive select to let you select one of 2 internal drives. steve -- ____________________________________________________________________ Steve Christensen Internet: stevec@goofy.apple.com Apple Computer, Inc. AppleLink: CHRISTENSE1 20525 Mariani Ave, MS 81-CS CompuServe: 76174,1712 Cupertino, CA 95014 "You just contradicted me." "No I didn't." ____________________________________________________________________
chma@iceman.jcu.oz (Michael Antolovich) (07/20/90)
In article <9265@goofy.Apple.COM>, stevec@Apple.COM (Steve Christensen) writes: > In article <846@iceman.jcu.oz> chma@iceman.jcu.oz (Michael Antolovich) writes: > >In article <1990Jul19.043349.4506@agate.berkeley.edu>, calvinc@sandstorm.Berkeley.EDU (Calvin Cheng) writes: > >> In article <11501@bsu-cs.bsu.edu> ali99@bsu-cs.bsu.edu (Mohammad Ali) writes: > >> >[stuff about trying to connect a 3rd floppy to a Mac SE/30] > > >> [history of Apple disk controllers plus 3rd part solutions] > > > This may seem silly, but can't a third drive be attached to a twin > >drive SE ? (Isn't CMD-SHFT 0 used for ejecting the third floppy ?) Do the > >Twin SE's have a different scheme to the rest of the Apple line ? > > Yes, but that's an SE not an SE/30. The SE/30 is essentially a IIx in a > different package so it's limited to 2 drives. The SE lets you have 3 drives > because there is an extra drive selection toggle that's used in conjunction > with the internal drive select to let you select one of 2 internal drives. > > steve I understand that, I was only replying to the bit that said :- >All Macs and Apple IIs are designed around the IWM (Integrated or Incredible >Woz Machine) and its direct descendent, the SIWM. Both of these chips are >only designed to work with 2 floppy drives connected. If you examine the >pin-out to your floppy port (nearly identical on the Apple IIs and Mac, not >too sure about the FDHD), to you'll find that one of the lines is a drive >select line. Aren't Twin Drive SE's considered part of the 'Mac and Apple II' line ? (:-) Michael pad pad pad pad pad pad pad pad pad pad pad pad pad pad pad pad pad
wiseman@tellabs.com (Jeff Wiseman) (07/21/90)
In article <9265@goofy.Apple.COM> stevec@Apple.COM (Steve Christensen) writes: >Yes, but that's an SE not an SE/30. The SE/30 is essentially a IIx in a >different package so it's limited to 2 drives. The SE lets you have 3 drives >because there is an extra drive selection toggle that's used in conjunction >with the internal drive select to let you select one of 2 internal drives. Just a thought, could you bring that extra line out (say using an unused pin on the 25 pin connector) and use it to then select between 4 drives (2 internal and 2 external)? (I would prefer 4 800K floppies to 2 HD's any day what with the trouble to be had with the HD's :-) -- Jeff Wiseman: ....uunet!tellab5!wiseman OR wiseman@TELLABS.COM
stevec@Apple.COM (Steve Christensen) (07/21/90)
In article <3079@tellab5.tellabs.com> wiseman@tellabs.com (Jeff Wiseman) writes: >In article <9265@goofy.Apple.COM> stevec@Apple.COM (Steve Christensen) writes: >>Yes, but that's an SE not an SE/30. The SE/30 is essentially a IIx in a >>different package so it's limited to 2 drives. The SE lets you have 3 drives >>because there is an extra drive selection toggle that's used in conjunction >>with the internal drive select to let you select one of 2 internal drives. > >Just a thought, could you bring that extra line out (say using an unused pin on >the 25 pin connector) and use it to then select between 4 drives (2 internal >and 2 external)? No, the SE's floppy driver software only knows how to deal with 2 internal and one external drive at most. steve -- ____________________________________________________________________ Steve Christensen Internet: stevec@goofy.apple.com Apple Computer, Inc. AppleLink: CHRISTENSE1 20525 Mariani Ave, MS 81-CS CompuServe: 76174,1712 Cupertino, CA 95014 "You just contradicted me." "No I didn't." ____________________________________________________________________