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Seek to enable disk capability, esp dual floppy cable
Posted: Thu Mar 27, 2014 4:20 am
by aisling42
I think all I need is a cable pre-made to operate a pair of dual floppies "as in the old days".
I have a pair of almost recent, still-in-the box 3.5s. Note: they are jumperless, unlike my first pair of 3.5 years ago (Roy [Wood], John I. and Don W. all tried to either repair the drives or determine the sort of cable needed for those drives). I have an original Black Box with an SGC and disk interfaces. (These 3.5s are from the former CompUSA). Jumperless drives apparently need a specially done cable.
If I can't get dual 3.5s going on the Black Box QL (my original QL heavily upgraded) I will then pursue something more modern, true. Or in addition maybe.
Let me know what you have or could create and likely fees.
Thanks,
Doug L. aisling42 SE USA
Re: Seek to enable disk capability, esp dual floppy cable
Posted: Thu Mar 27, 2014 8:55 am
by Derek_Stewart
Hi,
The drive select pins will be hard wired and the drives will be assumed to be used on a PC. I think all you need is a standard floppy drive cable with twist in the cable between Drive 1 & 2.
I have a few of these, if you send your address in a Private Message I will send you one to try.
Derek
Re: Seek to enable disk capability, esp dual floppy cable
Posted: Thu Mar 27, 2014 9:03 am
by prime
Derek_Stewart wrote:Hi,
The drive select pins will be hard wired and the drives will be assumed to be used on a PC. I think all you need is a standard floppy drive cable with twist in the cable between Drive 1 & 2.
I don't think it's a standard PC floppy cable. The cable you need will have a twist that reverses pins 10 and 12 between the two drives.
If you connect a single PC 1.44 drive to a QL controller with a straight cable (or a twisted one with it connected before the twist), it will work as flp2_ which should at least allow you to verify that the drive is working.
Cheers.
Phill.
Re: Seek to enable disk capability, esp dual floppy cable
Posted: Thu Mar 27, 2014 9:14 am
by XorA
Chances are if you open the drive you can locate where the drive select jumper "used" to be. You can then just move the 0Ohm resistor to the one you need.
G
Re: Seek to enable disk capability, esp dual floppy cable
Posted: Thu Mar 27, 2014 10:08 am
by Derek_Stewart
Hi,
Which is what I said, I had made up many Floppy Drive cables to reverse the Drive Select Pins.
Derek
Re: Seek to enable disk capability, esp dual floppy cable
Posted: Thu Mar 27, 2014 10:29 am
by 1024MAK
XorA wrote:Chances are if you open the drive you can locate where the drive select jumper "used" to be. You can then just move the 0Ohm resistor to the one you need.
G
Yes, the newer drives use SMD zero ohm (links) so it can be a bit fiddly. Most drives only give you a choice of drive 1(2)(as shipped for PCs) or drive 0(1).
Mark
Re: Seek to enable disk capability, esp dual floppy cable
Posted: Thu Mar 27, 2014 11:18 am
by prime
Derek_Stewart wrote:Hi,
Which is what I said, I had made up many Floppy Drive cables to reverse the Drive Select Pins.
Ahh but you also said "you need is a standard floppy drive cable with twist in the cable between Drive 1 & 2" which some might take to imply a standard PC drive cable, which won't work as it has too many pins swapped. You can of course take a standard PC cable and modify it.
Cheers.
Phill.